|
|
|
| Registros recuperados: 47 | |
|
|
| 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 |
| |
|
|
| Pigeot, J; Miramand, P; Guyot, T; Sauriau, Pierre-guy; Fichet, D; Le Moine, Olivier; Huet, V. |
| The Marennes-Oleron Bay is subject to chronic pollution by cadmium (Cd) from the Gironde watershed. An ecosystem approach was used to study the fate of cadmium in the different biological compartments. The median Cd concentration was 0.4 mu g g(-1) dry weight for the 63 benthic species measured. When combined with the respective biomasses for the different species studied, we estimated that 7 kg of Cd is partitioned into the soft tissues of the benthic species in the bay. The majority of this cadmium was distributed between primary producers, mainly microphytobenthos (40 %), and suspension-feeders, mainly oysters (40 %). All other benthic species measured were associated with negligible masses of Cd. Two trophic levels contained 98 % of the Cd: 3 kg was... |
| Tipo: Text |
Palavras-chave: Marennes Oleron Bay; Trophic food web; Bioaccumulation; Cadmium; Macrofauna; Microphytobenthos; Macrophytes. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-3615.pdf |
| |
|
|
| 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 (< 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 |
| |
|
| |
|
|
| Galeron, Joelle; Menot, Lenaick; Renaud, Nolwenn; Crassous, Philippe; Khripounoff, Alexis; Treignier, C.; Sibuet, M.. |
| Density, taxonomic composition at higher taxon level and vertical distribution of benthic macrofaunal communities and sediment characteristics (pore water, nitrogen, organic carbon, sulfur, C/N ratio, n-alcohol biomarkers) were examined at three deep sites on the Congo-Gabon continental margin. This study was part of the multidisciplinary BIOZAIRE project that aimed at studying the deep benthic ecosystems in the Gulf of Guinea. Sampling of macrofaunal communities and of sediment was conducted during three cruises (January 2001, December 2001 and December 2003) at two downslope sites (4000 m depth), one located near the Congo submarine channel (15 km in the south) and the other one far from the channel (150km in the South). The third area located 8 km north... |
| Tipo: Text |
Palavras-chave: Deep sea; Distribution; Community structure; Macrofauna; Congo canyon; Congo Angola margin; Equatorial west Africa margin; Atlantic. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-7315.pdf |
| |
|
|
| Dreujou, Elliot; Desroy, Nicolas; Carrière, Julie; Tréau De Coeli, Lisa; Mckindsey, Christopher W.; Archambault, Philippe. |
| With the widespread influence of human activities on marine ecosystems, evaluation of ecological status provides valuable information for conservation initiatives and sustainable development. To this end, many environmental indicators have been developed worldwide and there is a growing need to evaluate their performance by calculating ecological status in a wide range of ecosystems at multiple spatial and temporal scales. This study calculated and contrasted sixteen indicators of ecological status from three methodological categories: abundance measures, diversity parameters and characteristic species. This selection was applied to coastal benthic ecosystems at Sept-Îles (Québec, Canada), an important industrial harbor area in the Gulf of St. Lawrence,... |
| Tipo: Text |
Palavras-chave: Environmental indicators; Ecological status; Coastal benthos; Macrofauna; Gulf of St; Lawrence. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00687/79910/82820.pdf |
| |
|
|
| Denoyelle, Marieva; Jorissen, Frans J.; Martin, Daniel; Galgani, Francois; Mine, Jacques. |
| We compare foraminifera and macrofauna as bio-indicators of oil-based drill mud disposal site off Congo. The most polluted sites are characterized by poor faunas, dominated by some very tolerant taxa. Slightly further from the disposal site, there is an area with strongly increased densities, heavily dominated by opportunistic taxa. Still further, macrofauna appears to be similar to that at the reference area, but the foraminiferal meiofauna still suggests a slight environmental perturbation. The foraminiferal FIEI index, based on the species distribution in the study area, appears to be more discriminative than the macrofaunal ITI index, based on a priori definitions of the trophic guilds of the various taxa. Our comparative approach allows us to point... |
| Tipo: Text |
Palavras-chave: Bio-indicators; Biotic index; Drilling mud; Foraminifera; Macrofauna. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00019/13027/10203.pdf |
| |
|
|
| Riehl, Torben; De Smet, Bart. |
| Background: The Clarion-Clipperton Fracture Zone (CCFZ) in the Northeast Central Pacific Ocean is a region of heightened scientific and public interest because of its wealth in manganese nodules. Due to a poor ecological understanding at the abyssal seafloor and limited knowledge of the organisms inhabiting this area, huge efforts in alpha taxonomy are required. To predict and manage potential hazards associated with future mining, taxonomy is an essential first step to grasp fundamental ecosystem traits, such as biogeographic patterns, connectivity, and the potential for post-impact recolonization. Amongst samples from the Global Sea Mineral Resources NV exploration area (EA) in the CCFZ an undescribed species of the isopod crustacean family Macrostylidae... |
| Tipo: Text |
Palavras-chave: Taxonomy; Janiroidea; Macrostylidae; Crustacea; Deep-sea mining impact; Manganese nodules; CCFZ; CCZ; Macrofauna; Abyssal. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00611/72349/71247.pdf |
| |
|
| |
|
|
| Gittenberger, A.; Rensing, M.; Stegenga, H.; Hoeksema, B.W.. |
| Bij een inventarisatie van hard substraat in 83 locaties in de Nederlandse Waddenzee, in zoutgehaltes van 10-32 ppt, werden in juli/augustus 2009 in totaal 129 soorten planten en dieren waargenomen. Van deze soorten hadden er 29 een uitheemse of onbekende oorsprong. In aanvulling hierop werd een inventarisatie gemaakt van nog ongepubliceerde waarnemingen in de Waddenzee. Elf soorten en één ondersoort waren nog niet eerder geregistreerd in de Nederlandse Waddenzee. Eén alg, Ceramiaceae sp., met onbekende oorsprong, is vermoedelijk een nieuwe soort voor Europa. Eén zakpijpsoort, Molgula socialis, is nieuw voor Nederland. Deze soort is waarschijnlijk algemeen verspreid in Nederland en is mogelijk zelf inheems. In het verleden was hij vermoedelijk vaak... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Marine algae; Macrofauna; Nederland; Waddenzee; Hard substraat; 42.75. |
| Ano: 2010 |
URL: http://www.repository.naturalis.nl/record/441406 |
| |
|
| |
|
|
| Armenteros, M.; Ruiz-Abierno, A.; Sosa, Y.; Pérez-García, J. A.. |
| Benthic macrofauna and meiofauna distribution patterns were described in a tropical coral reef (Punta Francés, Cuban Archipelago, Caribbean Sea). Density and main taxa composition for macrofauna and meiofauna and species diversity and organismal traits for free-living nematodes were compared among four habitats: seagrass bed, sand flat, dead coral and hard bottom. Strong spatial patterns of distribution across habitats were detected and explained by a complex combination of habitat features. Signal/noise ratio for macrofauna data of distribution was enough strong to detect changes across habitats but the sizes of sampling devices were not adequate to represent the real patterns in the nature. Meiofauna patterns of distribution were driven by the... |
| Tipo: Journal Contribution |
Palavras-chave: Coral reefs; Distribution; Diversity index; Macrofauna. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4552 |
| |
|
|
| Lazo,Jatnel Alonso; Valdés,Nurys Valenciaga; Sampaio,Regynaldo Arruda; Leite,Germano Leão Demolin. |
| El objetivo de este trabajo fue evaluar la diversidad zoológica asociada a un silvopastoreo con leucaena-guinea, por medio de la caracterización de la composición y estructura de las aves, insectos y la macrofauna del suelo, en cuatro edades de establecimiento (3, 4, 5 y 6 años de explotación). Con las especies registradas en cada uno de estos grupos zoológicos, se calcularon los índices ecológicos: número de individuos, riqueza, diversidad y abundancia de especies, en diferentes edades del sistema. En todos los grupos, se apreció el aumento significativo en la riqueza de especies y en el índice de diversidad biológica de Shannon, en la medida que se desarrolló el sistema. Se observó incremento en la abundancia de insectos biorreguladores y, en relación... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leucaena leucocephala; Panicum maximum; Aves; Insectos; Macrofauna; Sostenibilidad. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007001200001 |
| |
|
|
| Baretta,Dilmar; Mafra,Álvaro Luiz; Santos,Julio Cesar Pires; Amarante,Cassandro Vidal Talamini do; Bertol,Ildegardis. |
| O objetivo deste trabalho foi avaliar o efeito de sistemas de preparo e cultivo do solo sobre a diversidade de animais da fauna edáfica, por meio de técnicas de análise multivariada. Na análise canônica discriminante, os preparos conservacionistas com sucessão de culturas foram separados em relação aos tratamentos com rotação de culturas. Os grupos Acarina, Hymenoptera, Isopoda e Collembola, e o índice de Shannon (H) foram os atributos que mais contribuíram para separar os tratamentos. A análise de correspondência mostrou forte associação dos grupos Acarina e Hymenoptera com o tratamento semeadura direta com sucessão de culturas, e do grupo Collembola com o preparo convencional. |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Biodiversidade; Bioindicadores; Semeadura direta; Preparo convencional; Mesofauna; Macrofauna. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006001100014 |
| |
|
|
| Fiuza,Denise Temporim Furtado; Kusdra,Jorge Ferreira; Fiuza,Sergio da Silva. |
| Chibui bari (Righi & Guerra, 1985) é um minhocuçu geófago, com tamanho até 60 cm, que tem como habitat vários solos no Acre. A atividade dessa espécie resulta na produção de grande quantidade de coprólitos ricos em nutrientes. O objetivo desta pesquisa foi avaliar o crescimento do milho em solo com presença da minhoca Chibui bari. O experimento foi conduzido em casa de vegetação da Universidade Federal do Acre, no município de Rio Branco, Acre, em 2009. O delineamento experimental foi inteiramente casualizado, com seis tratamentos (0, 1, 2, 3, 4 e 5 animais/tubo). O milho da variedade Bandeirante foi semeado em tubos de PVC com capacidade de 15,7 L, contendo solo de textura média. As variáveis avaliadas foram o diâmetro do colmo, as massas da... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Minhoca; Minhocuçu; Macrofauna; Zea mays. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200005 |
| |
|
|
| Macedo,Manuel Claudio Motta. |
| Sustentabilidade é tema atual e cada vez mais discutido no desenvolvimento agropecuário do Brasil. Este tem experimentado um grande desenvolvimento tecnológico e produtivo no agronegócio, ampliando as exportações, a renda dos produtores, a oferta de alimentos com melhor qualidade, e menor custo aos consumidores. No entanto, dois aspectos chamam a atenção quando se analisa sustentabilidade: o uso do solo com preparo excessivo e monocultivos, e a degradação das pastagens. O monocultivo e práticas culturais inadequadas têm causado perda de produtividade, degradação do solo e dos recursos naturais. Sistemas contínuos com monocultivos aumentam a ocorrência de pragas e doenças, tais como o percevejo castanho, nematóides e a ferrugem da soja, causando inúmeros... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria; Estoque de carbono; Lavoura-pecuária; Macrofauna; Qualidade do solo; SILPs; Sustentabilidade. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001300015 |
| |
|
|
| BERTRÁN,CARLOS; ARENAS,JOSÉ; PARRA,OSCAR. |
| Uno de los sistemas lóticos chilenos de mayor importancia de acuerdo a su caudal es el río Biobío (ca. 37º S). Su estuario es reducido, especialmente en las épocas de máximo caudal. Con el objetivo de poner a prueba la hipótesis de que en verano la disminución del caudal del río Biobío, determina una mayor depositación del material particulado fino y que el aumento del caudal en invierno resulta en el lavado y transporte del material depositado hacia el mar, y consecuentemente en una disminución de la macrofauna bentónica, se recolectaron muestras para análisis sedimentológicos y faunísticos en el curso inferior y estuario del río Biobío, durante agosto de 1993 y marzo de 1994. Los análisis sedimentológicos indican que el tamaño medio del sedimento... |
| Tipo: Journal article |
Palavras-chave: Macrofauna; Estuario del río Biobío; Cambios de caudal. |
| Ano: 2001 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000200010 |
| |
|
| |
|
|
| 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 |
| |
|
|
| Jacobucci,Giuliano B.; Leite,Fosca P. P.. |
| A biologia populacional de três espécies de anfípodes da família Ampithoidae (Ampithoe ramondi, Cymadusa filosa e Sunampithoe pelagica) associadas a Sargassum filipendula da Praia da Fortaleza, litoral norte do Estado de São Paulo foi estudada entre junho de 2000 e maio de 2001. Os anfípodes foram identificados, contados e separados em classes de tamanho através de um conjunto de peneiras agrupadas. Foram obtidos histogramas mensais de jovens, machos e fêmeas. A razão sexual dos ampitoídeos foi avaliada mensalmente. A biologia reprodutiva das espécies foi avaliada através freqüência relativa mensal de fêmeas ovígeras, de sua fecundidade, volume médio dos ovos e correlação do tamanho da cabeça com o número de ovos contidos em seus marsúpios. Ampithoe... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anfípodes; Dinâmica populacional; Fital; Macrofauna. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000400031 |
| |
| Registros recuperados: 47 | |
|
|
|
