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Registros recuperados: 31
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A new species of Elasmopus (Amphipoda: Hadzioidea: Maeridae) from Suape Harbor, Northeastern Brazilian coast Anais da ABC (AABC)
Senna,André R..
A new amphipod species of the genus Elasmopus Costa, 1853 is described based on material collected from intertidal rocky shore, near the Suape Harbor, coast of the Brazilian state of Pernambuco. The new species may be recognized by the propodus of gnathopod 2 suboval, slightly tapering distally, palmar margin not defined by a stout seta, spine, or palmar corner, with a subdistal blunt tubercle, posterior margin covered by a dense fringe of plumose setae, and posterior margin of basis of pereopod 7 castelloserrate. This is the ninety-fifth species of the genus Elasmopus described worldwide, the most diverse genus in the family Maeridae Krapp-Schickel, 2008, and the eighth species recorded from Brazilian waters. An identification key to Brazilian species of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazil; Elasmopus souzafilhoi sp. nov; Gammaridea; Intertidal; Pernambuco; Taxonomy.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300021
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Benthic metabolism in shallow coastal ecosystems of the Banc d'Arguin, Mauritania ArchiMer
Clavier, Jacques; Chauvaud, Laurent; Amice, Erwan; Lazure, Pascal; Van Der Geest, Matthijs; Labrosse, Pierre; Diagne, Ahmed; Carlier, Antoine; Chauvaud, Sylvain.
Benthic primary production and respiration were investigated at 4 sites representative of the major coastal communities bordering the Sahara Desert in the Banc d'Arguin, Mauritania, Western Africa. These sites correspond to intertidal Zostera noltii beds (270 km(2)), intertidal bare sediments (88 km(2)), subtidal Cymodocea nodosa beds (374 km(2)), and subtidal bare sediments (311 km(2)). At each site, production-irradiance relationships were established in situ in November 2008 and January 2010, and used to calculate daily carbon fluxes for these communities. In intertidal areas, compared to emersion, the gross maximal photosynthetic rates for Z. noltii bed and bare sediment communities were on average 8-and 7-fold higher during immersion, respectively;...
Tipo: Text Palavras-chave: Seagrass; Carbon metabolism; Intertidal; Subtidal; Respiration; Primary; Production; Western Africa.
Ano: 2014 URL: https://archimer.ifremer.fr/doc/00189/29987/28460.pdf
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Biodiversity of shallow-water sponges (Porifera) in Singapore and description of a new species of Forcepia (Poecilosclerida: Coelosphaeridae) Naturalis
Lim, S.-C.; Voogd, N.J. de; Tan, K.-S..
A surprisingly high number of shallow water sponge species (197) were recorded from extensive sampling of natural intertidal and subtidal habitats in Singapore (Southeast Asia) from May 2003 to June 2010. This is in spite of a highly modified coastline that encompasses one of the world’s largest container ports as well as extensive oil refining and bunkering industries. A total of 99 intertidal species was recorded in this study. Of these, 53 species were recorded exclusively from the intertidal zone and only 45 species were found on both intertidal and subtidal habitats, suggesting that tropical intertidal and subtidal sponge assemblages are different and distinct. Furthermore, only a third of the fouling species of sponges from a previous study was...
Tipo: Article / Letter to the editor Palavras-chave: Intertidal; Southeast Asia; Sponge assemblage; Subtidal; Tropical; 42.72.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/447989
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Change in the meiofauna community structure of sandy beaches of the Nuevo Gulf (Chubut, Argentina) Pap. Avulsos de Zool. (São Paulo)
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
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Comparaison démographique des populations de deux annélides polychètes seIon l'orientation des baies dans l'estuaire du Saint-Laurent ArchiMer
Caron, A; Desrosiers, G; Retiere, C; Hudier, E.
Variations in demographic parameters between intertidal populations of Nereis virens and Nephtys caeca were studied. These polychaetes are major component of the Macoma balthica community in the Lower St. Lawrence estuary (Quebec, Canada). We compared spatial distribution between differently oriented shores in a small geographic area. Our results revealed an interpopulation variability that appears to be dependent on hydrodynamical processes, edaphic parameters and biological interactions. In north and northeast oriented flats, the higher densities of young individuals of Nereis virens are found in the higher tidal levels where we observed larval recruitment and the highest organic matter contents. On the other hand, the lower densities of adult worms are...
Tipo: Text Palavras-chave: Orientation; Intertidal; Nereis virens; Nephtys caeca; Interpopulation variability; ORIENTATION; INTERTIDAL; NEREIS-VIRENS; NEPHTYS-CECA; INTERPOPULATION VARIABILITY.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/00323/43390/43114.pdf
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Do natural disturbances have significant effects on sandy beach macrofauna of Southeastern Brazil? Rev. Bras. Zool.
Costa,Leonardo Lopes; Machado,Phillipe Mota; Zalmon,Ilana Rosental.
ABSTRACT The role of morphodynamic features such as grain size, swash climate and wave action on the macrofauna of beaches are well-known. However, few studies have investigated natural disturbances as potential drivers of temporal community variations. In southeastern Brazil, we sampled the intertidal macrofauna of two sandy beaches to test whether seasonal disturbances as the frequency of storm wave events (SWE) and rainfall have significant influence on their composition and abundance. The macrofauna assemblage differed significantly between the rainy and the dry seasons, but rainfall was not the main driver of community changes, although both beaches are in the vicinity of extensive river plumes. Actually, SWE explained most macrofauna richness...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Community structure; Benthic community; Intertidal; Morphodynamics; Seasonality.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702019000100321
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DYNAMICS OF A MACROALGAL ROCKY INTERTIDAL COMMUNITY IN THE COLOMBIAN CARIBBEAN Boletín de Investigaciones
García,Camilo B.; Díaz Pulido,Guillermo.
The macroalgal intertidal community at a tropical location (Punta de la Loma, Colombian Caribbean) was monitored at irregular intervals from 1992 to 1995. The highly diverse macroalgal community was relatively invariant in cover, taxa and biomass from small spatial scales (square centimeters). At larger spatial scales (square meters), however, there was a small but definitive seasonal pulse in dominance and composition. Sand intrusions over the rocky intertidal represents a b disturbance reducing macroalgal cover during the dry season. Interannual variation was also detected. La Punta de la Loma appears to be influenced by the regional upwelling conditions.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dynamics; Macroalgal landscape; Intertidal; Colombian Caribbean.
Ano: 2006 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612006000100001
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Effects of short-term environmental disturbances on living benthic foraminifera during the Pacific oyster summer mortality in the Marennes-Oléron Bay (France) ArchiMer
Bouchet, Vincent; Debenay, Vincent; Sauriau, Pierre-guy; Radford Knoery, Joel; Soletchnik, Patrick.
Sediment cores were collected from April to August 2004 on tidal mudflats of the macrotidal Marennes-Oléron Bay (SW France), famous for the cultivation of Pacific oysters (Crassostrea gigas). The response of living (stained) benthic foraminifera to short-term biogeochemical disturbances in the sediment and overlying water, which may be involved in oyster summer mortality, was monitored. Short-term hypoxia occurred in early June, in conjunction with a sudden rise in temperature. In mid-June, the ammonia content of sediment porewater increased, leading to potentially maximal flux towards overlying waters. Foraminiferal assemblages, particularly in the topmost layer, were altered. Ammonia tepida was the most tolerant to temperature increase and hypoxic...
Tipo: Text Palavras-chave: Marennes Oléron bay; Aquaculture; Crassostrea gigas; Intertidal; Ammonium; Hypoxia; Organic matter; Living benthic foraminifera.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2586.pdf
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Exposure to solar radiation drives organismal vulnerability to climate: evidence from an intertidal limpet ArchiMer
Chapperon, Coraline; Volkenborn, Nils; Clavier, Jacques; Seite, Sarah; Seabra, Rui; Lima, Fernando P..
Understanding the physiological abilities of organisms to cope with heat stress is critical for predictions of species’ distributions in response to climate change. We investigated physiological responses (respiration and heart beat rate) of the ectotherm limpet Patella vulgata to heat stress events during emersion and the role of seasonal and microclimatic acclimatization for individual thermal tolerance limits. Individuals were collected from 5 microhabitats characterized by different exposure to solar radiation in the high intertidal zone of a semi-exposed rocky shore in winter and summer of 2014. Upper thermal tolerance limits (heat coma temperatures - HCTs, and heart rate Arrhenius break temperatures - ABTs) were determined for individuals from each...
Tipo: Text Palavras-chave: Patella vulgata; Heat stress; Acclimatization; Thermal tolerance; Microhabitat; Intertidal.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00318/42939/42447.pdf
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Hyperspectral and Lidar: Complementary Tools to Identify Benthic Features and Assess the Ecological Status of Sabellaria alveolata Reefs ArchiMer
Bajjouk, Touria; Jauzein, Cecile; Drumetz, Lucas; Dalla Mura, Mauro; Duval, Audrey; Dubois, Stanislas.
Sabellaria alveolata is a sedentary gregarious tube-building species widely distributed from southwest Scotland to Morocco. This species builds what are currently considered the largest European biogenic reefs in the bay of Mont-Saint-Michel (France). As an ecosystem engineer, S. alveolata generates small to large scale topographic complexity, creating numerous spatial and trophic niches for other species to colonize. Sabellaria reefs are also under anthropogenic pressures, leading locally to massive degradation. However, stakeholders lack spatially explicit measures of reef ecological status, at adapted spatial resolution to provide key management information for this protected habitat. Traditional field surveys are extremely time-consuming and rely on...
Tipo: Text Palavras-chave: Benthic habitats; Biogenic reefs; Ecological status; Hyperspectral; Intertidal; Lidar; Mapping.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00654/76574/77710.pdf
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Impact of the Phaeocystis globosa spring bloom on the intertidal benthic compartment in the eastern English Channel: A synthesis ArchiMer
Spilmont, Nicolas; Denis, Lucie; Artigas, Luis Felipe; Caloin, Frederic; Courcot, Lucie; Creach, Anne; Desroy, Nicolas; Gevaert, Francois; Hacquebart, Pascal; Hubas, Cedric; Janquin, Marie-andree; Lemoine, Yves; Luczak, Christophe; Migne, Aline; Rauch, Mathieu; Davoult, Dominique.
From 1999 to 2005, studies carried out in the frame of regional and national French programs aimed to determine whether the Phaeocystis globosa bloom affected the intertidal benthic communities of the French coast of the eastern English Channel in terms of composition and/or functioning. Study sites were chosen to cover most of the typical shore types encountered on this coast (a rocky shore, an exposed sandy beach and a small estuary). Both the presence of active Phaeocystis cells and their degradation product (foam) did have a significant impact on the studied shores. The primary production and growth rates of the kelp Saccharina latissima decreased during the bloom because of a shortage of fight and nutrient for the macroalgae. On sandy sediments, the...
Tipo: Text Palavras-chave: Macrozoobenthos; Bacteria; Saccharina latissima; Benthic fluxes; Phaeocystis globosa; Intertidal.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6142.pdf
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Independent effects of grazing and tide pool habitats on the early colonisation of an intertidal community on western Antarctic Peninsula RChHN
Segovia-Rivera,V; Valdivia,N.
BACKGROUND: Prevailing environmental conditions can modulate the structuring role of biotic interactions. In intertidal habitats, less stressful environmental conditions and/or higher grazer densities may allow grazing effects to be stronger in tide pools than on emergent rocks. To test this hypothesis, we conducted a manipulative experiment on an intertidal rocky shore in Fildes Bay, King George Island, in which the effect of the dominant grazer Nacella polaris on the structure of benthic periphyton communities was compared between emergent rock and tide pool habitats. Also, we determined the spatial variation in density, weight, and maximum length of individuals of N. polaris in both habitats RESULTS: The density of N. polaris was significantly larger in...
Tipo: Journal article Palavras-chave: Antarctica; Environmental stress model; Grazing; Herbivory; Intertidal; Nacella polaris; Periphyton.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2016000100003
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Malacofauna da região entremarés de praias da ilha de São Sebastião (São paulo, Brasil) Zoologia
Salvador,Lara Bellintani; Domaneschi,Osmar; Amaral,Antonia Cecília Zacagnini; Morgado,Eloisa Helena; Henriques,Silvaria Aparecida.
This paper reports a concise characterization, based on shell morphology, of 52 species collected dunng one year at intertidal regions of Barra Velha, Perequê and Engenho D'água beaches. Substrate information, species occurrence and geographic distribution are also provided.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mollusca; Sandy beaches; Intertidal; São Paulo; Brazil.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000400020
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Metabolomics based on UHPLC-QToF- and APGC-QToF-MS reveals metabolic pathways reprogramming in response to tidal cycles in the sub-littoral species Mimachlamys varia exposed to aerial emergence ArchiMer
Ory, Pascaline; Bonnet, Antoine; Mondeguer, Florence; Breitwieser, Marine; Dubillot, Emmanuel; Graber, Marianne.
Mimachlamys varia is a sub-littoral bivalve encountered from Norway to the Mediterranean Sea, which lives mostly byssally attached to rocks. During the low tide period, M. varia individuals, located highest on the shore, may experience short time of aerial exposure and face a low availability of oxygen. Here we report a comparative metabolomic profiling of gill samples of M. varia obtained by both LC-QToF and APGC-QToF mass spectrometry, to analyze metabolic changes occurring during emersion in comparison with immersion. Scallops were grown in aquaria with a simulated intertidal environment mimicking short-duration air exposure that they might experience during extreme tides: alternating 2 h emersion and 10 h immersion. Our results show a switch from...
Tipo: Text Palavras-chave: Anaerobic; APGC-QToF mass spectrometry; Hypoxia; Intertidal; LC-QToF mass spectrometry; Metabolomics; Mimachlamys varia; PLS-DA.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00466/57741/59936.pdf
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Microphytobenthic primary production, biomass, nutrients and pollutants of Santos Estuary (24ºS, 46º20'W). São Paulo, Brazil BABT
Sousa,Eduinetty Ceci Pereira Moreira de; Tommasi,Luiz Roberto; David,Carlos João.
The present study aimed to evaluate the seasonal variation of microphytobenthic biomass and its primary production in the intertidal zone in Santos Estuary (São Paulo, Brazil). This estuary is on the tropical region and it is regarded as a polluted area. The samples were collected at 3 sites, and environmental parameters, nutrients and heavy metals were analyzed. The primary production was evaluated according to GRφNTVED (1960) method whereas chlorophyll a and phaeopigment a were estimated by TETT et al. (1975) method. Total nitrogen K ranged from 20.0 to 115.0 µg·g-1 while total phosphate ranged from 26.0 to 223.0 µg·g-1. No significant seasonal variation of benthic primary production or chlorophyll a and phaeopigment a were observed. Significant positive...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomass; Primary production; Microphytobenthic; Intertidal; Pollutants; Biomassa; Produção primária; Microfitobentos; Entremarés; Poluentes.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000100004
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Mise en place d'indicateurs opérationnels de suivi des couvertures de fucales dans le cadre de l'avant projet détaillé "REBENT" ArchiMer
Guillaumont, Brigitte.
Un-quantified observations seem to indicate a decrease in brown algae blanket in inter-tidal zones along several coastlines. The goal of this contract, which is CEVA's contribution to REBENT- Bretagne_ year 2003, regards the quantitative evaluation and long term follow up of fucales in inter-tidal zones. The work that was accomplished during a previous contract with CEVA had allowed defining a SPOT image processing protocol used to evaluate and follow up, in time, global vegetal blankets. A methodology form had been written up and two SPOT images from the Trégor region had been processed as a vegetal blanket. Results analysis showed how being able to isolate fucales, and for that matter, its various species, was necessary in order to create more pertinent...
Tipo: Text Palavras-chave: Fucales; Staging; Intertidal; SPOT; Covers algales; Fucales; Etagement; Intertidal; SPOT; Couvertures algales.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/rapport-1657.pdf
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Morphometric analysis of Capitella capitata (Polychaeta, Capitellidae) Iheringia, Sér. Zool.
Pardo,Erica Veronica; Teixeira,Laura Laund S.; Amaral,Antônia Cecília Z..
Accurate size measurements are fundamental in characterizing the population structure and secondary production of a species. The purpose of this study was to determine the best morphometric parameter to estimate the size of individuals of Capitella capitata (Fabricius, 1780). The morphometric analysis was applied to individuals collected in the intertidal zones of two beaches on the northern coast of the state of São Paulo, Brazil: São Francisco and Araçá. The following measurements were taken: the width and length (height) of the 4th, 5th and 7th setigers, and the length of the thoracic region (first nine setigers). The area and volume of these setigers were calculated and a linear regression analysis was applied to the data. The data were log-transformed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capitellidae; Capitella capitata; Beaches; Intertidal; Morphometry.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000100002
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Onshore survey of macrobenthos along the Brittany coast following the Amoco Cadiz oil spill ArchiMer
Hyland, Jeffrey L..
A preliminary ecological survey was conducted along the northern Brittany coast for the purpose of evaluating the initial impact of the Amoco Cadiz oil spill on intertidal macrofaunal communities. Specific objectives were to observe obviously oiled, dead, or moribund organisms on contaminated beaches, and to conduct a limited examination of the structure and composition of benthic communities considered at risk to impact. Results reflecting these objectives are discussed for a variety of habitats.
Tipo: Text Palavras-chave: Amoco Cadiz; Pétrole brut; Étude écologique; Intertidal; Communautés macrofauniquëS; Impact de pétrole; Amoco Cadiz; Crude oil; Ecological survey; Intertidal; Macrofaunal communities; Oil impact..
Ano: 1978 URL: http://archimer.ifremer.fr/doc/00306/41727/40938.pdf
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Periwinkle (Gastropoda: Littorinidae) habitat selection and its impact upon microalgal populations BJB
APOLINÁRIO,M.; COUTINHO,R.; BAETA-NEVES,M. H..
The present study examines habitat selection and grazing pressure of the periwinkle Nodilittorina lineolata (Gmelin, 1791) on the rocky shore of Arraial do Cabo, RJ, Brazil (lat. 23°S, long. 43°W). Transfer experiments suggest that periwinkles actively select the mid intertidal, where the cirripede Chthamalus bisinuatus Pilsbry is the dominant sessile invertebrate. We also conducted a caging experiment in the middle intertidal, manipulating grazers and light, to assess the impact of grazing upon microalgal density. Grazing pressure significantly reduced microalgal abundance at the mid-intertidal level, suggesting that food availability plays an important role in the habitat selection of periwinkles on the studied shore.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazil; Habitat selection; Intertidal; Littorinidae; Microalgae.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000200005
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Population dynamics and secondary production of Euzonus furciferus Ehlers (Polychaeta, Opheliidae) in an exposed sandy beach of Southern Brazil Zoologia
Souza,José R. B. de; Borzone,Carlos A..
The distribution, population dynamics and secondary production of the polychaete Euzonus furciferus was studied in Atami Beach (Southern Brazil), from February 1992 to March 1993. Euzonus furciferus Ehlers, 1897 is the only deposit feeder species of the upper intertidal region. The organisms were present in the sandy beach all over the year, concentrated in a narrow band, and reaching maximal densities of 3,029 individuals m-2. Peaks of abundance occurred in September 1992, with a mean of 681.8 individuals m-2. Recruitment occurred in winter, with a peak in July. Mean annual biomass was estimated in 0.218 gAFDW m-2, with a total annual production of 0.466 gAFDW m-2 y-1, giving a P/B ratio of 2.13 y-1. Similar values were found for a filter-feeder...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Annelida; Benthos; Deposit feeder; Intertidal; Macrofauna.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000400034
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