Consulta: subjectFacets:"Meiofauna"
Registros recuperados: 49
Data/hora: 03/06/2024 02:55:06

Checklist de Gastrotricha do Estado do Mato Grosso do Sul, Brasil
Provedor de dados: 76
Autores: Garraffoni,André Rinaldo Senna.
RESUMO Neste estudo é apresentada uma lista atualizada das espécies de Gastrotricha que ocorrem nos corpos de água do estado de Mato Grosso do Sul. A grande maioria das espécies de Gastrotricha pertence a Chaetonotidae (quatro gêneros, nove espécies), seguida por Dasydytidae (três gêneros, três espécies) e Neogosseidae (um gênero, uma espécie). Como apenas um estudo foi realizado até hoje no estado do Mato Grosso do Sul, é mais do que evidente que o conhecimento da biodiversidade dos Gastrotricha está totalmente subestimado neste estado.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Meiofauna; Chaetonotidae; Dasydytidae; Neogosseidae; Programa Biota-MS.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212017000200204

Composição e variabilidade espaço-temporal da meiofauna de uma praia arenosa na região amazônica (Ajuruteua, Pará)
Provedor de dados: 76
Autores: Gomes,Tatianne P.; Rosa Filho,José S.
Este trabalho avalia a variabilidade espaço-temporal da meiofauna do médiolitoral na praia de Ajuruteua, Estado do Pará. As coletas foram realizadas a cada dois meses, entre abril de 2003 a fevereiro de 2004 durante as marés de sizígia, em diferentes zonas da praia. As amostras foram retiradas com um amostrador cilíndrico de 3,14 cm² e fixadas em formalina salina a 5%. Em laboratório, as amostras foram passadas em malha de 0,063 mm de abertura e os organismos retidos identificados em nível de grandes grupos taxonômicos, contados e fixados em álcool etílico a 70%. A meiofauna esteve representada por oito grupos: Turbellaria, Nematoda, Tardigrada, Polychaeta, Oligochaeta, Acari, adultos de Copepoda Harpacticoida e juvenis de Copepoda Harpacticoida. Nematoda...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bentos; Meiofauna; Distribuição espaço-temporal; Amazônia.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000200015

A closer look at Batillipes dicrocercus and new records of Batillipes potiguarensis (Tardigrada: Arthrotardigrada) from the Brazilian coast with comments on intra- and interspecific variability
Provedor de dados: 76
Autores: Santos,Érika; Gomes Jr,Edivaldo; Rocha,Clélia M. C. da; Bartels,Paul J.; Fontoura,Paulo.
ABSTRACT Batillipes specimens collected in the Southwestern Atlantic Ocean, on the Brazilian Coast (Campos Basin and Potiguar Basin) with a bifurcated caudal appendage similar to B. dicrocercus Pollock, 1970 were assigned to B. potiguarensis Santos, da Rocha, Gomes Jr &amp; Fontoura, 2017. This species was described as having a roundish caudal protrusion but, as shown in this study, it exhibits intraspecific variability of the morphology of the caudal apparatus. The examination of specimens of B. dicrocercus from the type locality (Massachussetts, U.S.A.) and the analysis of the original description and two subsequent emended descriptions, one from the Gulf of Mexico (U.S.A.) and another from the Mediterranean Sea, used for comparison, revealed important...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Batillipedidae; Biogeography; Meiofauna; Atlantic Ocean; Taxonomy.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100241

Stable isotope analysis position of intertidal of food source and trophic nematodes and copepods
Provedor de dados: 5
Autores: Rzeznik Orignac, J; Boucher, G; Fichet, Denis; Richard, P.
Four dominant nematode species and various copepods from an intertidal mudflat in Marennes-Oleron Bay were analyzed for delta C-13 and delta N-15 ratios together with their potential food source, the microphytobenthos. It was shown that microphytobenthic C is passed to nematodes either by grazing or predation on herbivorous meiofauna by other nematodes. Diatoms of different sizes exhibited different C-13 content, which can be reflected in herbivorous meiofauna, such as the nematodes Daptonema oxycerca and Metachromadora remanei and the bulk of copepods, indicating they can select different sizes of diatoms. Results confirm the need to analyze meiofauna feeding habits at the species or genera level since the delta N-15 and delta C-13 signatures differed...
Tipo: Text
Palavras-chave: Stable isotopes; Marennes Oleron; Mudflat; Food web; Benthic diatoms; Microphytobenthos; Meiofauna; Copepods; Nematodes.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4292.pdf

Meiofauna assemblages of the Condor Seamount (North-East Atlantic Ocean) and adjacent deep-sea sediments
Provedor de dados: 5
Autores: Zeppilli, Daniela; Bongiorni, Lucia; Cattaneo, Antonio; Danovaro, Roberto; Santos, R.
Seamounts are currently considered hotspots of biodiversity and biomass for macro- and megabenthic taxa, but knowledge of meiofauna is still limited. Studies have revealed the existence of highly diverse meiofauna assemblages; however most data are mainly qualitative or focused only on specific groups, thus preventing comparisons among seamounts and with other deep-sea areas. This study, conducted on Condor Seamount (Azores, North-East Atlantic Ocean), describes variation in abundance, biomass, community structure and biodiversity of benthic meiofauna from five sites located on the Condor Seamount: and one site away from the seamount. While the summit of the seamount hosted the highest alpha biodiversity, the flanks and the bases showed a rich meiofauna...
Tipo: Text
Palavras-chave: Condor Seamount; Meiofauna; Biodiversity; Deep-sea sediments; Azores.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00152/26324/24398.pdf

Four new species of Kinorhyncha from the Gulf of California, eastern Pacific Ocean
Provedor de dados: 5
Autores: Cepeda, Diego; Álvarez-castillo, Lucia; Hermoso-salazar, Margarita; Sanchez, Nuria; Gomez, Samuel; Pardos, Fernando.
Several meiofaunal samples from the central and lower Gulf of California were studied. Four new species of kinorhynchs, Cristaphyes fortis sp. nov., Higginsium mazatlanensis sp. nov., Cephalorhyncha teresae sp. nov. and Echinoderes xalkutaat sp. nov., are described herein. Cristaphyes fortis sp. nov. may be distinguished from its most similar congeners by its more strongly developed pachycycli and ball-and-socket joints and the presence of unpaired paradorsal setae on segments 2, 4 and 6, two pairs of ventrolateral setae on segment 5, one pair of ventrolateral setae on segments 2–4, 6–7 and 10, and one pair of ventromedial setae on segments 8–9. Higginsium mazatlanensis sp. nov. is easily distinguished from its congeners by the combined presence of...
Tipo: Text
Palavras-chave: Kinorhynchs; Meiofauna; Biodiversity; Taxonomy; Pycnophyidae; Echinoderidae.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00501/61246/64824.pdf

Is the meiofauna a good indicator for climate change and anthropogenic impacts?
Provedor de dados: 5
Autores: Zeppilli, Daniela; Sarrazin, Jozee; Leduc, Daniel; Arbizu, Pedro Martinez; Fontaneto, Diego; Fontanier, Christophe; Gooday, Andrew J.; Kristensen, Reinhardt Mobjerg; Ivanenko, Viatcheslav N.; Sorensen, Martin V.; Vanreusel, Ann; Thebault, Julien; Mea, Marianna; Allio, Noemie; Andro, Thomas; Arvigo, Alexandre; Castrec, Justine; Danielo, Morgan; Foulon, Valentin; Fumeron, Raphaelle; Hermabessiere, Ludovic; Hulot, Vivien; James, Tristan; Langonne-augen, Roxanne; Le Bot, Tangi; Long, Marc; Mahabror, Dendy; Morel, Quentin; Pantalos, Michael; Pouplard, Etienne; Raimondeau, Laura; Rio-cabello, Antoine; Seite, Sarah; Traisnel, Gwendoline; Urvoy, Kevin; Van Der Stegen, Thomas; Weyand, Mariam; Fernandes, David.
Our planet is changing, and one of the most pressing challenges facing the scientific community revolves around understanding how ecological communities respond to global changes. From coastal to deep-sea ecosystems, ecologists are exploring new areas of research to find model organisms that help predict the future of life on our planet. Among the different categories of organisms, meiofauna offer several advantages for the study of marine benthic ecosystems. This paper reviews the advances in the study of meiofauna with regard to climate change and anthropogenic impacts. Four taxonomic groups are valuable for predicting global changes: foraminifers (especially calcareous forms), nematodes, copepods and ostracods. Environmental variables are fundamental in...
Tipo: Text
Palavras-chave: Meiofauna; Climate change; Anthropogenic impacts; Biomonitoring; Natural observations and experimental studies.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00278/38938/37521.pdf

Trophic role of large benthic sulfur bacteria in mangrove sediment
Provedor de dados: 5
Autores: Pascal, Pierre-yves; Dubois, Stanislas; Boschker, Henricus T. S.; Gros, Olivier.
Large filamentous sulfur-oxidizing bacteria belonging to the Beggiatoacae family can cover large portions of shallow marine sediments surrounding mangroves in Guadeloupe (French West Indies). In order to assess the importance of Beggiatoa mats as an infaunal food source, observations were conducted of the area within mats and at increasing distances from mats. We used natural isotopic compositions and a C-13 enrichment study. Both revealed an ingestion of bacterial mats by associated meiofauna, dominated by rotifers and to a smaller extent by small polychaetes and nematodes. Compared to adjacent sites, sediment covered by bacterial mats presented a higher abundance of diatoms, whereas the total biomass of bacteria did not vary. This constant bacterial...
Tipo: Text
Palavras-chave: Beggiatoa; Mangrove; Benthic food web; Sulfur bacteria; Meiofauna; Nematode; Rotifers; Stable isotope.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00248/35919/34449.pdf

The contribution of deep-sea macrohabitat heterogeneity to global nematode diversity
Provedor de dados: 5
Autores: Vanreusel, Ann; Fonseca, Gustavo; Danovaro, Roberto; Da Silva, Maria Cristina; Esteves, Andre M.; Ferrero, Tim; Gad, Gunnar; Galtsova, Valentina; Gambi, Cristina; Genevois, Veronica Da Fonseca; Ingels, Jeroen; Ingole, Baban; Lampadariou, Nikolaos; Merckx, Bea; Miljutin, Dmitry; Miljutina, Maria; Muthumbi, Agnes; Netto, Sergio; Portnova, Daria; Radziejewska, Teresa; Raes, Maarten; Tchesunov, Alexei; Vanaverbeke, Jan; Van Gaever, Saskia; Venekey, Virag; Bezerra, Tania Nara; Flint, Hannah; Copley, John; Pape, Ellen; Zeppilli, Daniela; Martinez, Pedro Arbizu; Galeron, Joelle.
The great variety of geological and hydrological conditions in the deep sea generates many different habitats. Some are only recently explored, although their true extent and geographical coverage are still not fully established. Both continental margins and mid-oceanic seafloors are much more complex ecologically, geologically, chemically and hydrodynamically than originally thought. As a result, fundamental patterns of species distribution first observed and explained in the context of relatively monotonous slopes and abyssal plains must now be re-evaluated in the light of this newly recognized habitat heterogeneity. Based on a global database of nematode genus composition, collected as part of the Census of Marine Life, we show that macrohabitat...
Tipo: Text
Palavras-chave: Biodiversity; Census of marine life; Deep sea; Habitat heterogeneity; Meiofauna; Nematode genera.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11280/11783.pdf

First Assessment of the Benthic Meiofauna Sensitivity to Low Human-Impacted Mangroves in French Guiana
Provedor de dados: 5
Autores: Michelet, Claire; Zeppilli, Daniela; Hubas, Cédric; Baldrighi, Elisa; Cuny, Philippe; Dirberg, Guillaume; Militon, Cécile; Walcker, Romain; Lamy, Dominique; Jézéquel, Ronan; Receveur, Justine; Gilbert, Franck; Houssainy, Amonda El; Dufour, Aurélie; Heimbürger-boavida, Lars-eric; Bihannic, Isabelle; Sylvi, Léa; Vivier, Baptiste; Michaud, Emma.
Bioindicators assess the mangroves ecological state according to the types of pressures but they differ with the ecosystem’s specificities. We investigated benthic meiofauna diversity and structure within the low human-impacted mangroves in French Guiana (South America) in response to sediment variables with various distances to the main city. Contaminant’s concentrations differed among the stations, but they remained below toxicity guidelines. Meiofauna structure (Foraminifera, Kinorhyncha, Nematoda) however varied accordingly. Nematode’s identification brought details on the sediment’s quality. The opportunistic genus Paraethmolaimus (Jensen, 1994) strongly correlated to the higher concentrations of Hg, Pb. Anoxic sediments were marked by organic...
Tipo: Text
Palavras-chave: Mangroves; Biodiversity; Meiofauna; Nematode; Anthropogenic pressures; Natural contamination; South America.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00684/79587/82274.pdf

Characteristics of meiofauna in extreme marine ecosystems: a review
Provedor de dados: 5
Autores: Zeppilli, Daniela; Leduc, Daniel; Fontanier, Christophe; Fontaneto, Diego; Fuchs, Sandra; Gooday, Andrew J.; Goineau, Aurelie; Ingels, Jeroen; Ivanenko, Viatcheslav N.; Kristensen, Reinhardt Mobjerg; Neves, Ricardo Cardoso; Sanchez, Nuria; Sandulli, Roberto; Sarrazin, Jozee; Sorensen, Martin V.; Tasiemski, Aurelie; Vanreusel, Ann; Autret, Marine; Bourdonnay, Louis; Claireaux, Marion; Coquille, Valerie; De Wever, Lisa; Rachel, Durand; Marchant, James; Toomey, Lola; Fernandes, David.
Extreme marine environments cover more than 50% of the Earth’s surface and offer many opportunities for investigating the biological responses and adaptations of organisms to stressful life conditions. Extreme marine environments are sometimes associated with ephemeral and unstable ecosystems, but can host abundant, often endemic and well-adapted meiofaunal species. In this review, we present an integrated view of the biodiversity, ecology and physiological responses of marine meiofauna inhabiting several extreme marine environments (mangroves, submarine caves, Polar ecosystems, hypersaline areas, hypoxic/anoxic environments, hydrothermal vents, cold seeps, carcasses/sunken woods, deep-sea canyons, deep hypersaline anoxic basins [DHABs] and hadal zones)....
Tipo: Text
Palavras-chave: Extreme environments; Meiofauna; Mangroves; Submarine caves; Polar ecosystems; Melting ice; Hypersaline areas; Anoxic and hypoxic zones; Hydrothermal vents; Cold seeps; Carcasses and sunken woods; Deep sea; Submarine canyons; Deep hypersaline anoxic basins (DHABs); Hadal zones.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00410/52140/52851.pdf

Deep-sea Kinorhyncha diversity of the polymetallic nodule fields at the Clarion-Clipperton Fracture Zone (CCZ)
Provedor de dados: 5
Autores: Sánchez, Nuria; Pardos, Fernando; Arbizu, Pedro Martínez.
Kinorhynch specimens were studied from abyssal sediment samples collected during seven cruises at the Clarion-Clipperton Fracture Zone (Eastern Central Pacific), a vast area that will be mined for polymetallic nodules in a near future. This study is the first in a series focused on kinorhynchs mainly collected at the German zone following requirements of the International Seabed Authority (ISA), who demands identification of fauna associated with nodules previous to the concession of the exploitation license. A total of 18 species were found, of which three new Echinoderidae species are described herein. Cephalorhyncha polunga sp. nov. is easily discriminated from its congeners by the presence of pointed and prominent tergal extensions together with...
Tipo: Text
Palavras-chave: Cephalorhyncha; Cyclorhagida; Echinoderidae; Echinoderes; Meiofauna; Meristoderes; Taxonomy.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00502/61330/64902.pdf

Evolution des caractéristiques chimiques et biologiques des sédiments en circuit clos. II. Effets de la matière organique circulante sur la méiofaune de systèmes polytrophes
Provedor de dados: 5
Autores: Boucher, G.
Chemical and Biological evolution of sediments in closed circuit : II. Effect of soluble organic matter input on meiofauna in poly­trophic systems. The effect on meiofauna of the input of soluble organic matter in clo­sed circuit sand filters was followed during two years for an oligotrophic, a mesotrophic and an eutrophic tank, and during one year for an atrophic tank. In the case of no input, the density, biomass and species richness of nematodes decreases even if equitability remains constant. Oligotrophy main­tains the stability and diversity. Mesotrophy changes the community composition by species succession. Eutrophy allows biomass increase, due to one dominant species.
Tipo: Text
Palavras-chave: Circuit clos; Matière organique; Meiofaune; Closed circuit; Organic matter; Meiofauna.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00305/41653/40862.pdf

Meiofauna communities’ response to an anthropogenic pressure: The case study of green macroalgal bloom on sandy beach in Brittany
Provedor de dados: 5
Autores: Baldrighi, Elisa; Grall, Jacques; Quillien, Nolwenn; Carriço, Rita; Verdon, Valentin; Zeppilli, Daniela.
Open sandy beaches support key ecological functions and a distinctive biodiversity, but are threatened by an increasing anthropogenic pressure. Among these threats is the occurrence of green tides of Ulva spp., expression of the eutrophication phenomenon. Our study aimed at determining the impact of green macroalgal accumulations on benthic meiofauna inhabiting two macrotidal sandy beaches of Brittany: Saint Nic (impacted) and Anse de Dinan (unimpacted). The presence of Ulva enhanced total meiofaunal abundance and nematode functional diversity when compared to a state free from macroalgal mats. The stranded Ulva supported high values of meiofaunal β-diversity as well. This unexpected response was likely due to the highly dynamic nature of open sandy...
Tipo: Text
Palavras-chave: Meiofauna; Macroalgal bloom; Sandy beach; Nematodes; Brittany; Anthropogenic impact; Ulva spp.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62069/66249.pdf

Dragons of the Deep Sea: Kinorhyncha Communities in a Pockmark Field at Mozambique Channel, With the Description of Three New Species
Provedor de dados: 5
Autores: Cepeda, Diego; Pardos, Fernando; Zeppilli, Daniela; Sánchez, Nuria.
Cold seep areas are extremely reduced habitats with spatiotemporal variation of hydrocarbon-rich fluid seepage, low oxygen levels, and great habitat heterogeneity. Cold seeps can create circular to ellipsoid shallow depressions on the seafloor called pockmarks. We investigated two selected pockmarks, characterized by different gas emission, and two sites outside these geological structures at the Mozambique Channel to understand whether and how their environmental conditions affect the kinorhynch fauna in terms of density, richness, and community composition. A total of 11 species have been found living in the studied area, of which three are new species: Fissuroderes cthulhu sp. nov., Fujuriphyes dagon sp. nov., and Fujuriphyes hydra sp. nov. Densities...
Tipo: Text
Palavras-chave: Cold seeps; Deep sea; Ecology; Kinorhynchs; Meiofauna; Diversity; Taxonomy.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00648/75992/76894.pdf

Xylocythere sarrazinae, a new cytherurid ostracod (Crustacea) from a hydrothermal vent field on the Juan de Fuca Ridge, northeast Pacific Ocean, and its phylogenetic position within Cytheroidea
Provedor de dados: 5
Autores: Tanaka, Hayato; Lelièvre, Yann; Yasuhara, Moriaki.
This paper described Xylocythere sarrazinae sp. nov. (Ostracoda: Cytheroidea: Cytheruridae: Eucytherurinae), collected at 2196 m depth from the Grotto hydrothermal edifice (Main Endeavor Field, Juan de Fuca Ridge) in the northeastern Pacific Ocean. This new species was found living in association with Ridgeia piscesae tubeworm assemblages. It is the second representative of Xylocythere described from such vents. Xylocythere sarrazinae sp. nov. is easily distinguished from the seven described species of Xylocythere by the surface ornamentations of its carapace, with the most similar species to it being Xylocythere pointillissima Maddocks &amp; Steineck, 1987. However, Xylocythere sarrazinae sp. nov can be distinguished from X. pointillissima based on the...
Tipo: Text
Palavras-chave: Chemosynthetic habitat; Crustacea; Eucytherurinae; Meiofauna; Pore clusters.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00511/62292/66569.pdf

Meiofauna and sedimentary organic matter off Central Chile: response to changes caused by the 1997-1998 El Nino
Provedor de dados: 5
Autores: Neira, C; Sellanes, J; Soto, A; Gutierrez, D; Gallardo, Va.
Quantitative surveys of metazoan meiofauna were carried out in an upwelling region off Central Chile (36 degreesS). During May 1997 and May 1998, coinciding with the onset and end of Fl Nino, five benthic stations (respectively 27, 34, 64, 88, and 120 m depth), from the middle of Concepcion Bay to the edge of the adjacent continental shelf, were sampled. The sedimentary organic matter biopolymeric fraction (proteins, carbohydrates and lipids) and chloroplastic pigments were also assessed. Total meiofauna abundance and biomass increased significantly between sampling dates at the mid-bay and inner shelf sites, from 1474 +/- 354 to 5035 +/- 291 individuals 10 cm(-2) and from 2618 +/- 332 to 5241 +/- 903 individuals 10 cm(-2), respectively. The relative...
Tipo: Text
Palavras-chave: Chili central; El Niño; Méiofaune; Matière organique; Thioploca; Central Chile; El Nino; Meiofauna; Organic matter; Thioploca.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43358/42857.pdf

The Cost for Biodiversity: Records of Ciliate–Nematode Epibiosis with the Description of Three New Suctorian Species
Provedor de dados: 5
Autores: Baldrighi, Elisa; Dovgal, Igor; Zeppilli, Daniela; Abibulaeva, Alie; Michelet, Claire; Michaud, Emma; Franzo, Annalisa; Grassi, Eleonora; Cesaroni, Lucia; Guidi, Loretta; Balsamo, Maria; Sandulli, Roberto; Semprucci, Federica.
Epibiosis is a common phenomenon in marine systems. In marine environments, ciliates are among the most common organisms adopting an epibiotic habitus and nematodes have been frequently reported as their basibionts. In the present study, we report several new records of peritrich and suctorian ciliates-nematode association worldwide: from a deep-sea pockmark field in the NW Madagascar margin (Indian Ocean), from a shallow vent area in the Gulf of Naples (Mediterranean, Tyrrhenian Sea), in a MPA area in the Gulf of Trieste (Mediterranean, Adriatic Sea), from a mangrove system in French Guiana (South America, Atlantic Ocean), and from the Maldivian Archipelago. In addition, three new species of Suctorea from the Secca delle Fumose shallow vent area (Gulf of...
Tipo: Text
Palavras-chave: Epibiosis; Ciliophora; Suctorea; Nematoda; Meiofauna; Biodiversity.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00632/74417/74132.pdf

Variation in structure and biomass of the benthic communities at three contrasting sites in the tropical Northeast Atlantic
Provedor de dados: 5
Autores: Galeron, Joelle; Sibuet, Myriam; Mahaut, Ml; Dinet, A.
Three major size classes of the benthic metazoan communities (megafauna, macrofauna and meiofauna) were investigated simultaneously at 3 sites in the tropical Northeast Atlantic. The sites varied in their level of surface primary productivity (eutrophic, mesotrophic and oligotrophic). Results for 3 cruises in 3 seasons (Eumeli 2, winter 1991; Eumeli 3, autumn 1991; Eumeli 4, spring 1992) are given for each size class in terms of taxonomic composition, density and biomass. The benthic communities did not exhibit evidence of seasonal variation, but there were substantial differences in the quantitative structure of the metazoan communities between the 3 sites. Total metazoan density and biomass, as well as density and biomass of each size class, decreased...
Tipo: Text
Palavras-chave: Deep sea; Tropical Atlantic; Meiofauna; Macrofauna; Megafauna; Taxonomic composition; Density; Biomass; Environmental conditions.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00000/10519/7602.pdf

Seasonal dependence on seagrass detritus and trophic niche partitioning in four copepod eco-morphotypes
Provedor de dados: 5
Autores: Mascart, Thibaud; De Troch, Marleen; Remy, François; Michel, Loic; Lepoint, Gilles.
Benthic copepods dominate meiofaunal communities from marine phytodetritus, both in terms of numerical abundance and species diversity. Nevertheless, ecological factors driving copepod co-existence and population dynamics are still largely unknown. Here, we aimed to explore feeding habits of four copepod species commonly found in Mediterranean seagrass detritus accumulations, representing distinct eco-morphotypes (planktonic, phytal, epibenthic and mesopsammic). Joint use of fatty acid and stable isotope trophic markers showed that co-occurring harpacticoid copepods have diversified diets. Contrary to what was expected, microphytobenthos does not serve as their main food source. Instead, we found evidence from both techniques that major food items include...
Tipo: Text
Palavras-chave: Macrophytodetritus; Posidonia oceanica; Meiofauna; Stable isotopes; Fatty acids; Isotopic niche; Mixing models; Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00440/55187/60472.pdf

Composition en cires, triglycérides, protéines et sucres du mésozooplancton
Provedor de dados: 5
Autores: Alayse-danet, Anne-marie; Daniel, Jean-yves; Le Coz, Jean-rene.
Analyses effectuées sur le zooplancton total des pêches verticales au WP2 et sur des animaux triés à partir des pêches horizontales (Campagne RCA sur les côtes Atlantiques du Portugal). On ne signale pas de différence significative entre la composition biochimique des populations du large et de la côte
Tipo: Text
Palavras-chave: Zooplancton; Milieu marin; Composition chimique; Glucide; Cire animale; Triglycéride; Protéine; Océan Atlantique Nord; Upwelling; Méiofaune; Portugal; France; Zone côtière; Zooplankton; Marine environment; Chemical composition; Carbohydrate; Animal wax; Triglyceride; Proteins; North Atlantic; Upwelling; Meiofauna; Portugal; France; Coastal zone.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00189/29976/28429.pdf

Endogenous versus exogenous factors: What matters for vent mussel communities?
Provedor de dados: 5
Autores: Sarrazin, Jozee; Portail, Marie; Legrand, E.; Cathalot, Cecile; Laes, Agathe; Lahaye, Noe; Sarradin, Pierre-marie; Husson, Berengere.
The factors influencing the structure of hydrothermal communities are not necessarily similar across geographical regions and vent fields. In the present study, we explore the role of environmental conditions on vent community structure at local and regional spatial scales, focusing on the assemblages dominated by the engineer species Bathymodiolus azoricus. Their presence in several vent fields on the northern Mid-Atlantic Ridge (MAR) represents a unique opportunity to compare their associated fauna and to better understand large-scale biodiversity patterns. Two types of factors were considered: exogenous ones such as the presence of biogeographical barriers, depth, and distance between sites, and those linked to the intrinsic characteristics of each...
Tipo: Text
Palavras-chave: Intra-field variability; Inter-field variability; Hydrothermal fauna; Abiotic factors; Diversity measures; Macrofauna; Meiofauna; Environmental drivers; Community structure; Habitats.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00615/72661/71671.pdf

First report of the family Zelinkaderidae (Kinorhyncha: Cyclorhagida) for the Caribbean Sea, with the description of a new species of Triodontoderes Sørensen and Rho, 2009 and an identification key for the family
Provedor de dados: 5
Autores: Cepeda, Diego; Sanchez, Nuria; Pardos, Fernando.
A new species of Kinorhyncha, Triodontoderes lagahoo sp. nov., is described from Tobago Island, Caribbean Sea (western Atlantic Ocean) from a coastal, sandy habitat using both light and scanning electron microscopy. The species is characterized by the presence of middorsal acicular spines on segments 1–11 (that on segment 10 crenulated in males), laterodorsal crenulated spines on segment 10 only in males, lateroventral acicular spines on segments 3–4 and 6–8 (lateroventral spines also on segment 10 in females), lateroventral cuspidate spines on segments 5 and 9, lateral accessory acicular spines on segments 5 and 9, lateral accessory cuspidate spines on segment 8, ventrolateral acicular spines on segment 2 and ventrolateral cuspidate spines on segment 2....
Tipo: Text
Palavras-chave: Kinorhynchs; Biodiversity; Meiofauna; Morphology; Taxonomy; Triodontoderes lagahoo sp. nov.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00502/61325/64897.pdf

Setaphyes elenae sp. nov., a new species of mud dragon (Kinorhyncha: Allomalorhagida) from Skagerrak (north-eastern Atlantic Ocean)
Provedor de dados: 5
Autores: Cepeda, Diego; González-casarrubios, Alberto; Sánchez, Nuria; Pardos, Fernando.
Meiofauna sampling in the proximity of Syd-Hällsö Island (Strömstad, Sweden) revealed a new species of Kinorhyncha from the Skagerrak. The species, Setaphyes elenae sp. nov., is distinguished from its congeners by the arrangement of the middorsal cuticular specializations (it has shortened, distally rounded middorsal processes on segments 1 and 9 and middorsal elevations throughout segments 2–8), as well as by the presence of paired laterodorsal setae on segments 3, 5, 7 and 9 and ventromedial setae on segments 3, 5 and 7 in both males and females. The finding of a new species from the northeastern Atlantic Ocean, provides new valuable information for the recently established genus in the Allomalorhagida.
Tipo: Text
Palavras-chave: Meiofauna; Taxonomy; Scalidophora; Biodiversity; Invertebrates.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00627/73912/73248.pdf

Meiofauna distribution in a mangrove forest exposed to shrimp farm effluents (New Caledonia)
Provedor de dados: 5
Autores: Della Patrona, Luc; Marchand, C.; Hubas, C.; Molnar, N.; Deborde, J.; Meziane, T.
Meiofauna abundance, biomass and individual size were studied in mangrove sediments subjected to shrimp farm effluents in New Caledonia. Two strategies were developed: i) meiofauna examination during the active (AP) and the non-active (NAP) periods of the farm in five mangrove stands characteristics of the mangrove zonation along this coastline, ii) meiofauna examination every two months during one year in the stand the closest to the pond (i.e. Avicennia marina). Thirteen taxonomic groups of meiofauna were identified, with nematodes and copepods being the most abundant ones. Meiofauna abundance and biomass increased from the land side to the sea side of the mangrove probably as a result of the increased length of tidal immersion. Abundance of total...
Tipo: Text
Palavras-chave: Mangrove; Meiofauna; Shrimp farming; Environmental status; New Caledonia.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00341/45170/44620.pdf

Dungeons and Dragons: two new species and records of Kinorhyncha from anchialine cenotes and marine lava tubes
Provedor de dados: 5
Autores: Sánchez, Nuria; Martínez, Alejandro.
Caves are natural laboratories to investigate evolutionary processes in the ocean. In contrast to the many described lineages of cave exclusive crustaceans and annelids, very little is known about cave scalidophorans. We here describe two new species of kinorhynchs from a lava tube in the Canary Islands and a cenote in the Yucatan Peninsula. Leiocanthus bretti sp. nov., from Tenerife, is mainly characterized by the lack of middorsal structure specializations on all trunk segment, middorsal line covered by hairs on segments 3-9, unpaired paradorsal setae on segments 2–9, middorsal seta on segment 10, and laterodorsal setae on segments 2–9 and 11. Pycnophyes kukulkan sp. nov. from Yucatan is defined by the strong denticulation in the tergal anterior margin,...
Tipo: Text
Palavras-chave: Leiocanthus; Loricifera; Meiofauna; Marine cave; Priapulida; Pycnophyes.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00501/61245/64823.pdf

Modification de l'équilibre démographique de la meiofaune dans les lagunes aménagées de Certes
Provedor de dados: 5
Autores: Castel, J.; Lasserre, P.
Monthly sampling for a 2-year period allowed comparisons between the communities of meiofauna living in fish ponds ("reservoirs a poissons de Certes") and those inhabiting a contiguous tidal pool ("lac de tonne"). Nematods and copepods constitute the bulk of the meiofaunal populations. The community structure of co­pepods is considered in detail.The communities of copepods are clearly separated between the two areas. In terms of abundance, diversity and species persistence, the meiofauna is more stable in the intertidal pool than in the fish ponds. When the seasons are well marked, the community structure of the cope­pods in the fish ponds is nearly equilibrated in spring, with a maximum of diver­sity in May-June. During high eutrophication periods, in...
Tipo: Text
Palavras-chave: Lagunes; Diversité; Distribution différentielle; Meiofaune; Copépodes; Bassin d'Arcachon; Lagoons; Diversity; Differential distribution; Meiofauna; Copepods; Arcachon Bay.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00306/41681/40890.pdf

Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America
Provedor de dados: 5
Autores: Egger, Christina; Neusser, Timea P.; Norenburg, Jon; Leasi, Francesca; Buge, Barbara; Vannozzi, Angelo; Cunha, Regina L.; Cox, Cymon J.; Jörger, Katharina M.
Caecidae is a species-rich family of microsnails with a worldwide distribution. Typical for many groups of gastropods, caecid taxonomy is largely based on overt shell characters. However, identification of species using shell characteristics is problematic due to their rather uniform, tubular shells, the presence of different growth stages, and a high degree of intraspecific variability. In the present study, a first integrative approach to caecid taxonomy is provided using light-microscopic investigation with microsculptural analyses and multi-marker barcoding, in conjunction with molecular species delineation analyses (ABGD, haplotype networks, GMYC, and bPTP). In total 132 specimens of Caecum and Meioceras collected during several sampling trips to...
Tipo: Text
Palavras-chave: DNA taxonomy; Marine biodiversity; Meiofauna; Molecular species delineation; Mollusca.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00651/76325/77304.pdf

Tubeworm-associated permanent meiobenthic communities from two chemically different hydrothermal vent sites on the East Pacific Rise
Provedor de dados: 5
Autores: Gollner, Sabine; Zekely, Julia; Govenar, Breea; Le Bris, Nadine; Nemeschkal, Hans L.; Fisher, Charles R.; Bright, Monika.
The permanent meiobenthic community associated with aggregations of the tubeworm Riftia pachyptila was characterized at 2 different hydrothermal vent sites, Tica and Riftia Field, on the East Pacific Rise near 9 degrees 50'N. The maximum effluent temperatures were similar at both sites, but the chemistry of the hydrothermal fluids differed between sites. The abundance of meiobenthos was very low in 5 out of 6 samples (&lt;61 ind. 10 cm(-2)) and was higher at Tica (20 to 976 ind. 10 cm(-2)) than at Riftia Field (&lt; 1 to 12 ind. 10 cm(-2)). Meiobenthos abundance was positively correlated with the volume of sediment within the tubeworm aggregations. Sediment consisted mainly of particulate organic material and contained only a few mineral grains. A total of...
Tipo: Text
Palavras-chave: Riftia pachyptila; Community study; Copepods; Nematodes; East Pacific Rise; Hydrothermal vent; Meiofauna; Meiobenthos.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2623.pdf

Kinorhyncha from the Caribbean, with the description of two new species from Puerto Rico and Barbados
Provedor de dados: 5
Autores: Cepeda, Diego; Pardos, Fernando; Sánchez, Nuria.
Two new kinorhynch species from Puerto Rico (Greater Antilles) and Barbados (Lesser Antilles) are described herein from Dr R. P. Higgins unexamined Caribbean meiofaunal samples, which have been stored in the Smithsonian Institution collections. The species from Puerto Rico, Cristaphyes cornifrons sp. nov., belongs to the class Allomalorhagida, whereas the species from Barbados, Echinoderes barbadensis sp. nov., belongs to the class Cyclorhagida. Cristaphyes cornifrons sp. nov. is easily distinguished from most of its congeners by the presence of lateral terminal spines and the absence of male, sexually dimorphic, ventromedial tubes on segment 2, as only other two species of the genus lack these features. Of these, C. cornifrons sp. nov. may be easily...
Tipo: Text
Palavras-chave: Kinorhynchs; Biodiversity; Meiofauna; Morphology; Taxonomy.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00501/61249/64829.pdf

Deep-sea habitat heterogeneity influence on meiofaunal communities in the Gulf of Guinea
Provedor de dados: 5
Autores: Van Gaever, Saskia; Galeron, Joelle; Sibuet, Myriam; Vanreusel, Ann.
To estimate the degree of spatial heterogeneity of benthic deep-sea communities, we carried out a multiple-scale (from m's to 200km) investigation in the Congo-Angola margins (Equatorial West African margin, 3150-4800 m) in which we examined the metazoan meiofauna at a variety of habitats along the Congo Channel system and in the associated cold seep. We investigate the structure, density, vertical distribution patterns in the sediment and biomass of meiofaunal communities in the Gulf of Guinea and how they are controlled by hydrologic and biogeochemical processes The meiofaunal. communities in the Gulf of Guinea were shaped by heterogeneous conditions on the margin, and reflect the multiple-scale spatial variability that corresponds with the different...
Tipo: Text
Palavras-chave: Gulf of Guinea; Nematodes; Meiofauna; Cold seep; Congo canyon; West equatorial Africa margin deep sea.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7483.pdf

The influence of geological, geochemical, and biogenic habitat heterogeneity on seep biodiversity
Provedor de dados: 5
Autores: Cordes, Erik E.; Cunha, Marina R.; Galeron, Joelle; Mora, Camilo; Olu-le Roy, Karine; Sibuet, Myriam; Van Gaever, Saskia; Vanreusel, Ann; Levin, Lisa A.
Cold seeps are among the most heterogeneous of all continental margin habitats. Abiotic Sources of heterogeneity in these systems include local variability in fluid flow, geochemistry, and substrate type, which give rise to different sets of microbial communities, microbial symbiont-bearing foundation species, and associated heterotrophic species. Biogenic habitats created by microbial mats and the symbiotic species including vesicomyid clams, bathymodiolin mussels, and siboglinid tubeworms add an additional layer of complexity to seep habitats. These forms of habitat heterogeneity result in a variety of macrofaunal and meiofaunal communities that respond to changes in structural complexity, habitat geochemistry, nutrient sources, and interspecific...
Tipo: Text
Palavras-chave: Beta diversity; Chemosynthetic communities; Cold seep; Continental margin; Macrofauna; Meiofauna; Metacommunity; Species accumulation.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11281/7826.pdf

Biodiversity patterns, environmental drivers and indicator species on a High-temperature Hydrothermal edifice, mid-Atlantic ridge
Provedor de dados: 5
Autores: Sarrazin, Jozee; Legendre, Pierre; De Busserolles, Fanny; Fabri, Marie-claire; Guilini, Katja; Ivanenko, Viatcheslav N.; Morineaux, Marie; Vanreusel, Ann; Sarradin, Pierre-marie.
Knowledge on quantitative faunal distribution patterns of hydrothermal communities in slow-spreading vent fields is particularly scarce, despite the importance of these ridges in the global mid-ocean system. This study assessed the composition, abundance and diversity of 12 benthic faunal assemblages from various locations on the Eiffel Tower edifice (Lucky Strike vent field, Mid-Atlantic Ridge) and investigated the role of key environmental conditions (temperature, total dissolved iron (TdFe), sulfide (TdS), copper (TdCu) and pH) on the distribution of macro- and meiofaunal species at small spatial scales (&lt; 1 m). There were differences in macro- and meiofaunal community structure between the different sampling locations, separating the hydrothermal...
Tipo: Text
Palavras-chave: Biodiversity patterns; Environmental drivers; Indicator species; Hydrothermal vents; Mid-Atlantic Ridge; Meiofauna; Macrofauna; Lucky Strike.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00266/37713/35731.pdf

Colonization of synthetic sponges at the deep-sea Lucky Strike hydrothermal vent field (Mid-Atlantic Ridge): a first insight
Provedor de dados: 5
Autores: Baldrighi, Elisa; Zeppilli, Daniela; Crespin, Rosalie; Chauvaud, Pierre; Pradillon, Florence; Sarrazin, Jozee.
The main objective of the present study was to investigate invertebrate colonization processes at deep-sea hydrothermal vents in response to environmental factors and to the presence of complex artificial substrata (i.e., synthetic sponges). We set out a pilot experiment at 1700 m depth on the Lucky Strike vent field (Eiffel Tower, Mid-Atlantic Ridge). Synthetic sponges were deployed in 2011 at five sites along a gradient of hydrothermal activity and were recovered in 2013, and the composition of macro- and meiofauna was assessed on four of them. The influence of temperature and fluid inputs on colonizer faunal abundance and diversity was analyzed. Faunal abundance and diversity decreased with increasing distance from vent emission. The colonizers were...
Tipo: Text
Palavras-chave: Synthetic sponges; Colonization; Lucky Strike; Meiofauna; Macrofauna; Substratum type.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00410/52135/52937.pdf

Meiofaunal communities and nematode diversity characterizing the Secca delle Fumose shallow vent area (Gulf of Naples, Italy)
Provedor de dados: 5
Autores: Baldrighi, Elisa; Zeppilli, Daniela; Appolloni, Luca; Donnarumma, Luigia; Chianese, Elena; Russo, Giovanni Fulvio; Sandulli, Roberto.
Hydrothermal venting is rather prevalent in many marine areas around the world, and marine shallow vents are relatively abundant in the Mediterranean Sea, especially around Italy. However, investigations focusing on the characterization of meiofaunal organisms inhabiting shallow vent sediments are still scant compared to that on macrofauna. In the present study, we investigated the meiobenthic assemblages and nematode diversity inhabiting the Secca delle Fumose (SdF), a shallow water vent area located in the Gulf of Naples (Italy). In this area, characterized by a rapid change in the environmental conditions on a relative small spatial scale (i.e., 100 m), we selected four sampling sites: one diffusive emission site (H); one geyser site (G) and two...
Tipo: Text
Palavras-chave: Secca delle Fumose; Gulf of Naples; Shallow vent; Meiofauna; Nematode diversity.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00631/74343/73995.pdf

A Nematode of the Mid-Atlantic Ridge Hydrothermal Vents Harbors a Possible Symbiotic Relationship
Provedor de dados: 5
Autores: Bellec, Laure; Cambon-bonavita, Marie-anne; Cueff-gauchard, Valerie; Durand, Lucile; Gayet, Nicolas; Zeppilli, Daniela.
Deep-sea hydrothermal vent meiofauna have been the focus of recent research and the discovery of an abundant well-adapted free-living marine nematode on the Mid-Atlantic Ridge offers new perspectives on adaptations to the vent environment. Indeed, knowledge concerning biological interactions of microbes and meiofauna in marine extreme environments is scarce, especially for nematodes. In this study, we used microscopic observations [fluorescence in situ hybridization (FISH) and scanning electron microscopy (SEM)] and metabarcoding of 16S rRNA to characterize the bacterial community of the nematode species Oncholaimus dyvae, an overlooked but ecologically important vent organism. Detection of bacteria in the buccal cavity and on the cuticle (SEM) and...
Tipo: Text
Palavras-chave: Sulfur-oxidizing bacteria; Lucky Strike vent field; Meiofauna; Nematode; Endosymbiont.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00457/56846/58676.pdf

Co-occurring nematodes and bacteria in submarine canyon sediments
Provedor de dados: 5
Autores: Rzeznik-orignac, Jadwiga; Puisay, Antoine; Derelle, Evelyne; Peru, Erwan; Le Bris, Nadine; Galand, Pierre E.
In submarine canyon sediments, bacteria and nematodes dominate the benthic biomass and play a key role in nutrient cycling and energy transfer. The diversity of these communities remains, however, poorly studied. This work aims at describing the composition of bacteria and nematode communities in the Lacaze-Duthiers submarine canyon in the north-western Mediterranean Sea. We targeted three sediment depths for two consecutive years and investigated the communities using nuclear markers (18S rRNA and 16S rRNA genes). High throughput sequencing combined to maximal information coefficient (MIC) statistical analysis allowed us to identify, for the first time, at the same small scale, the community structures and the co-occurrence of nematodes and bacteria...
Tipo: Text
Palavras-chave: Bacteria; Meiofauna; Canyon Lacaze-Duthiers; Metabarcording; Molecular approach; Mediterranean Sea; Nematodes; Marine biodiversity; 18S; 16S.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56586/76447.pdf

Gnathostomulida from the (sub)tropical northwestern Atlantic
Provedor de dados: 16
Autores: Sterrer, Wolfgang.
Sterrer, W., 1997. Gnathostomulida from the (sub)tropical northwestern Atlantic. Studies Nat. Hist. Caribbean Region 74, Amsterdam, 1998: 1-178. Based on 1035 specimens of Gnathostomulida from 106 samples collected during the period 1968-1997 in the tropical and subtropical northwestern Atlantic, 45 species are presented, including one new family (Paucidentulidae nov. fam.), two new genera ( Vampyrognathia nov. gen. and Paucidentula nov. gen.), and 13 new species: Haplognathia belizensis, Cosmognathia aquila, Pterognathia alcicornis, P. pygmaea, Mesognatharia eastwardiae, Onychognathia rhombocephala, Vampyrognathia horribilis, V. minor, Paucidentula anonyma, Gnathostomula uncinata, Triplignathia (?) bathycola, Austrognatharia medusifera, and A. stirialis.
Tipo: Article / Letter to the editor
Palavras-chave: New species.; Marine; Free-living; Meiofauna; Taxonomy new genera.
Ano: 1998
URL: http://www.repository.naturalis.nl/record/503188

The Parotoplana jondelii species-group (Platyhelminthes: Proseriata): a microturbellarian radiation in the Mediterranean
Provedor de dados: 16
Autores: Delogu, V.; Curini-Galletti, M.
Seven new Parotoplana species (Proseriata: Otoplanidae) from the Mediterranean, belonging to the P. jondelii complex, are described. They are characterized by the presence of numerous (14-22) copulatory spines. These are characteristically broad, and arranged in a girdle around the distal portion of the ejaculatory duct. In most species, dorsal and ventral spines are distinctly different from the rest of the spines of the girdle. This morphology of the copulatory spines is apomorphic for the genus Parotoplana, and supports a close relationship among these species. The new species (P. axi sp. n., P. crassispina sp. n., P. carthagoensis sp. n., P. gracilispina sp. n., P. ichnusae sp. n., P. obtusispina sp. n., P. pulchrispina sp. n.) are distinguished by...
Tipo: Article / Letter to the editor
Palavras-chave: Biodiversity; Meiofauna; New species; Parotoplana; Taxonomy; Vicariance; 42.76.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/316129

Diversidad y distribución de la macro- y meiofauna (especialmente nemátodos) en el ecosistema arrecifal de Punta Francés, Cuba
Provedor de dados: 20
Autores: Ruiz Abierno, A.
Se estudió la diversidad y distribución de la macro-  y meiofauna  y los rasgos  funcionales de nemátodos marinos en dos sitios y cuatro hábitats dentro del ecosistema  arrecifal de Punta Francés, Isla de La Juventud, Cuba. Los hábitats seleccionados  fueron: seibadal,  arena, coral muerto y fondo duro, y se muestrearon en dos sitios  dentro del arrecife (Punta Francés y Cabezo de Moya) en Junio del 2010. Se  identificaron y contaron los organismos de la macro- y meiofauna en las muestras; los  nemátodos fueron identificados hasta especie, se calculó su tamaño y biomasa y se  clasificaron en grupos tróficos.  Los hábitats de coral muerto y fondo duro por su  heterogeneidad y cubierta de césped de algas  tuvieron  macro-  y meiofauna más  diversa. La...
Tipo: Theses and Dissertations
Palavras-chave: Microfauna; Meiofauna; Coral reefs; Ecosystems.
Ano: 2013
URL: http://hdl.handle.net/1834/5484

Composición y abundancia del meiobentos en el sublitoral de la  Habana, Cuba
Provedor de dados: 20
Autores: Armenteros Almanza, M.
En las regiones tropicales se han realizado estudios extensos sobre grupos  conspicuos como peces, corales y macroalgas, pero existe poca información  comparativa sobre la meiofauna (Gourbault et al., 1995). En Cuba se han publicado  varios trabajos sobre abundancia y distribución del meiobentos (Herrera y Del Valle,  1980; Herrera y Sánchez, 1982; Jiménez Ibarzábal, 1982; Herrera, 1983; Herrera y  Amador, 1983; Lalana-Rueda y Gosselck, 1986; López-Cánovas, 1987), pero en la  década pasada la ausencia de estos es notable.  En el sublitoral de La Habana se han realizado estudios de varias taxocenosis  correspondientes a la megafauna (ejemplos: peces, corales y gorgonias); la  complementación de tales estudios y el impacto que se  ejerce sobre esta zona...
Tipo: Theses and Dissertations
Palavras-chave: Meiofauna; Meiobenthic organisms; Coastal structures.
Ano: 2003
URL: http://hdl.handle.net/1834/5667

Estructura de las comunidades de la meiofauna de la Bahía de Nipe, Cuba
Provedor de dados: 20
Autores: Cuervo, Z.; Armenteros, M.; Capetillo, N.; Arencibia, G.; Pérez, I.; González, G.
The structure of meiofaunal communities was surveyed in 17 stations in Nipe Bay, Cuba in July, 2001. Levels of Nickel (all stations) are higher than in several bays in Cuba, probably due to natural causes. The levels of Copper, Zinc, Fe and Manganese indicate a relative low pollution, likely related to the presence of urban settlements. There is decrease in the total density and number of taxa of meiofauna in the stations with higher levels of metals; the copepods appear to be particularly sensitivity to metal pollution. The stations located at the mouth of the bay have the lowest levels of contamination and the highest total density of organisms and taxa richness, probably due to a more intense turnover of the waters in this area and consequent lower...
Tipo: Proceedings Paper
Palavras-chave: Heavy metals; Meiofauna; Meiobenthos; Heavy metals; Meiobenthos.
Ano: 2006
URL: http://hdl.handle.net/1834/2173

On the vertical distribution of metazoan meiofauna in shelf break and upper slope habitats of the NE Atlantic
Provedor de dados: 27
Autores: Vanreusel, A.; Vincx, M.; Schram, D.; Van Gansbeke, D.
The metazoan meiofauna of nine stations in shelf break and upper slope areas (70 to 1500 m water depth) of the N.E. Atlantic were investigated in order to assess which environmental factors are important in the control of densities and sediment profiles. Total meiofaunal densities (ranging between 368 and 1523 ind/10 cm&lt;sup&gt;2&lt;/sup&gt; were correlated with bacterial densities, an important food source for meiofauna. However, considering sediment vertical distribution profiles, the relative importance of both food and oxygen on the meiofauna became obvious. A combination of both bacterial densities and oxygen supply could explain about 95% of the variability in the vertical profiles of the meiofauna densities. Meiofauna numbers increase in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Meiofauna; Vertical profiles.
Ano: 1995
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7279

Chave de identificação de Gastrotricha de águas continentais e marinhas do Brasil
Provedor de dados: 84
Autores: Garraffoni,André R.S.; Araújo,Thiago Q.
Os Gastrotricha são microinvertebrados de vida livre, caracterizados por um estilo de vida meiobentônico em ambientes marinhos e de água doce. Apesar de este grupo ser abundante e ecologicamente importante nas teias alimentares, o seu conhecimento no Brasil é muito subestimado. Com este estudo, considerando a importância dos Gastrotricha nas comunidades bênticas intersticiais, esperamos ajudar e estimular novas pesquisas com este grupo no Brasil. Assim, esse trabalho fornece uma chave dicotômica para todas as espécies previamente reportadas em águas continentais brasileiras. Além disso, apresentamos informações sobre métodos de coleta, técnicas de preservação e de fotografias dos Gastrotricha. As terminologias, em português, das principais características...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Meiofauna; Bentos; Biodiversidade; Sistemática; Psâmico; Espécies marinhas; Espécies de água doce.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492010003300001

Change in the meiofauna community structure of sandy beaches of the Nuevo Gulf (Chubut, Argentina)
Provedor de dados: 84
Autores: Harguinteguy,Carlos A.; Cofré,M. Noelia; Pastor de Ward,Catalina T.
The composition and distribution of the benthic meiofauna assemblages of the Nuevo Gulf (Chubut, Argentina) are described in relation to abiotic variables. The meiofauna and sediment samples were collected in the intertidal zone of four sandy beaches with different anthropic disturbances in June 2005. The samples were obtained at 20 sampling sites using a 2.5 cm diameter core tube at a depth of 10 cm. A total of 13 meiofauna taxa were identified, with the meiofauna being primarily represented by nematodes, gastrotrichs, ciliates and polychaetes and the meiofauna abundances ranging from 1.5 × 10³ to 6.5 × 10³ ind. 10 cm‑2. Univariate (one-way ANOVA test) and multivariate (ANOSIM/MDS test) analyses showed clear dissimilarities in community structures between...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Meiofauna; Intertidal; Sandy sediment; Argentina.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492012021400001

A new species of Quinquelaophonte (Copepoda: Harpacticoida) from Argentina
Provedor de dados: 103
Autores: Sciberras,Michel; Bulnes,Verónica Natalia; Cazzaniga,Néstor J.
Quinquelaophonte aestuarii sp. nov. (Copepoda, Harpacticoida) from Bahía Blanca estuary is the first record of Quinquelaophonte Wells, Hicks &amp;amp; Coull, 1982 in Argentina and its southernmost location in the world. The setal formula (P2: exopod 1.2.3-endopod 1.2.0; P3: exopod 1.2.3-endopod 2.2.1; P4: exopod 1.2.3-endopod 1.2.0) of the last segment of P2-P4, in both the exopod and the endopod, distinguishes this species from all known species in Quinquelaophonte, except for Quinquelaophonte varians Bjornberg, 2010. The new species differs from the latter in the setal formula of the antennule, the mouth parts and maxillipeds, the absence of an inner seta on the second exopod segment of P2, the length of the second exopod segment of P4 and in the shape...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Buenos Aires province; Laophontidae; Meiofauna; Taxonomy.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000500010

Composición, estructura y flujo energético del meiobentos frente a Chile central
Provedor de dados: 97
Autores: SELLANES,JAVIER; NEIRA,CARLOS; QUIROGA,EDUARDO.
Se estudió la estructura de la meiofauna metazoaria (a nivel de grandes grupos taxonómicos) y su rol en el flujo de energía en el subsistema bentónico frente a Concepción (~3630' S). Las muestras se recolectaron en mayo y noviembre de 1997 y mayo de 1998 en cinco sitios correspondientes a: interior de la Bahía de Concepción (28 m), boca de la bahía (35 m), plataforma interior (64 m), plataforma intermedia (88 m) y plataforma externa (120 m). El periodo de estudio coincidió con el evento El Niño 1997-1998 (EN). El meiobentos resultó ser poco diverso a nivel de grandes grupos, pero con abundancias y biomasas moderadas a altas, en comparación con los valores promedio reportados en la literatura para el sublitoral fangoso. Nematoda fue el grupo dominante, con...
Tipo: Journal article
Palavras-chave: Meiofauna; Producción secundaria; Flujo energético; El Niño; Chile central.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000300006

Population structure of Comesoma arenae Gerlach (Nematoda, Comesomatidae) in a Brazilian tropical tidalflat, Rio de Janeiro, Brazil
Provedor de dados: 104
Autores: Esteves,André Morgado; Maria,Tatiana Fabricio; Wandeness,Adriane Pereira.
The objective is to describe the population structure of Comesoma arenae Gerlach, 1956 during a one-year period. The area studied, Coroa Grande, is located in Sepetiba Bay, State of Rio de Janeiro, Brazil. Sampling was carried out monthly, from May 1998 through April 1999. Most individuals in the population were adults, of which non-ovigerous females were the most abundant. The species showed its highest population densities during the colder months.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Marine nematodes; Meiofauna.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000400008

Effects of the burrowing crab Chasmagnathus granulata (Dana) on meiofauna of estuarine intertidal habitats of Patos Lagoon, Southern Brazil
Provedor de dados: 52
Autores: Rosa,Leonardo Cruz; Bemvenuti,Carlos Emilio.
This study aimed to evaluate the effects of the burrowing crab Chasmagnathus granulata on meiofauna at three intertidal habitats across a tidal exposure gradient (i.e., an emerged salt marsh, an emerged mudflat and a submerged mudflat) in an estuarine embayment of Patos Lagoon, Southern Brazil. Meiofauna community was dominated by nematodes and ostracods, following by copepods and turbellarians. Densities of all studied organisms varied significantly among habitats. Highest values were observed in submerged mudflat while lower in salt marsh. Nematodes were unaffected by crab in either habitat, whereas ostracod, copepod and turbellarian densities were significantly lower in disturbed than control areas in both mudflat habitats. Any meiofaunal group was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Burrowing crab; Chasmagnathus granulata; Meiofauna; Disturbance; Natural experiment; Southern Brazil.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000200014