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Registros recuperados: 35 | |
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Заика, В. Е.. |
Обсуждаются находки представителей эукариот микро- и мейобентоса на дне континентальных склонов и ложа Чёрного моря. Эти находки необычны для заражённой сероводородом зоны и противоречат укоренившимся представлениям: 1) об отсутствии жизни, кроме бактериальной, на глубинах Чёрного моря, и 2) о невозможности жизни в среде, содержащей сероводород. Приведена краткая история изучения глубин Чёрного моря. Даётся комментарий к находкам Н. Г. Сергеевой. Приводятся доводы, почему эти находки не могут быть трупами, занесёнными из верхней, аэрируемой части моря. Дан обзор литературы по находкам эукариот в других аноксических биотопах, содержащих сероводород, а также сведения о стратегиях животных мейобентоса по детоксикации сероводорода. |
Tipo: Journal Contribution |
Palavras-chave: Бентос склона и ложа; Микробентос; Мейобентос; Чёрное море; Benthos of bottom bed and slope; Microbenthos; Meiobenthos; Black Sea; Бентос схилу та ложа; Мікробентос; Чорне море. |
Ano: 2008 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/827 |
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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 (<61 ind. 10 cm(-2)) and was higher at Tica (20 to 976 ind. 10 cm(-2)) than at Riftia Field (< 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 |
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Zekely, J; Gollner, S; Van Dover, C; Govenar, B; Le Bris, Nadine; Nemeschkal, H; Bright, M. |
The meiobenthic nematode community of three different vent sites at the East Pacific Rise was studied in order to determine whether the abundance, species richness, diversity and trophic structure were similar. The sites Tica and Riftia Field were dominated by the tubeworm, Riftia pachyptila, and the Buckfield site was dominated by the mussel Bathymodiolus thermophilus. The nematode communities of all three sites were low in abundance (< 1 up to 46 ind. 10 cm(-2)), except one sample from Tica with almost 1000 ind. 10 cm(-2). The communities at all sites consisted entirely of primary consumers, mostly deposit feeders. Species richness and Shannon-Wiener diversity indices were low and similar at both tubeworm sites and slightly but significantly higher at... |
Tipo: Text |
Palavras-chave: East Pacific Rise; Bathymodiolus thermophilus; Riftia pachyptila; Nematodes; Meiobenthos; Hydrothermal vent. |
Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-3608.pdf |
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Spedicato, Adriana; Sánchez, Nuria; Pastor, Lucie; Menot, Lenaick; Zeppilli, Daniela. |
The risk assessment of seafloor massive sulfide (SMS) mining on meiobenthic organisms, specifically on soft-sediment meiofauna, is impeded by a lack of knowledge on the biology and ecology of these communities. In this study, we investigated sediment samples taken in proximity of active vents at Trans-Atlantic Geotraverse (TAG) and Snake Pit, two hydrothermal vent fields of the Mid-Atlantic Ridge, in order to explore metazoan meiofauna, particularly nematode community, and its relation to organic carbon, total nitrogen, total sulfur, and dissolved oxygen. Organic carbon and nitrogen contents were low at both sites. High concentrations of total sulfur and low oxygen penetration were found at Snake Pit compared to TAG. Snake Pit showed approximately four... |
Tipo: Text |
Palavras-chave: Meiobenthos; Nematoda; Mid-Atlantic Ridge; Seafloor massive sulfides; Biodiversity. |
Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00629/74061/73507.pdf |
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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 |
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Essid, N.; Mahmoudi, E.; Beyrem, H.; Aissa, P.; Hedfi, A.. |
The survey of sediment and hydrological parameters in the old harbor of Bizerte has revealed that this ecosystem knows a high anthropogenic pressure. In this area waters were characterized by weak contents in dissolved oxygen and sediments, rich in fine fraction, were loaded in hydrocarbons and in organic matter. The free-living nematodes, predominant taxa, responded to these disturbances by a significant decrease in their densities and their biomasses and had tendency, notably at the most isolated sites, to penetrate deeply to escape surface sediments highly loaded in hydrocarbons and in organic matter. |
Tipo: Journal Contribution |
Palavras-chave: Hydrocarbons; Pollution effects; Pollution indicators; Meiobenthos; Harbours; Man-induced effects; Bioindicators; Hydrocarbons; Http://aims.fao.org/aos/agrovoc/c_3719. |
Ano: 2003 |
URL: http://hdl.handle.net/1834/1115 |
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Nasri, A.; Boufahja, F.; Hedfi, A.; Mahmoudi, E.; Aissa, P.; Essid, N.. |
Une étude microcosmique a été réalisée pour déterminer l’effet d’un antibiotique (la Pénicilline G) sur une communauté méiofaunistique prélevée au niveau des sédiments de la lagune de Bizerte (Nord de la Tunisie).Cinq doses croissantes de ce contaminant émergent (D1 : 3 mg.L-1, D2 : 30 mg. L-1, D3 : 300 mg. L-1, D4 : 600 mg. L-1 et D5 : 700 mg. L-1), ont été mises en examen pendant 30 jours d’exposition. Les densités méiofaunistiques moyennes ont été très fluctuantes en comparant les microcosmes témoins avec ceux traités. Les microcosmes témoins ont été associés à une densité moyenne de 91 ± 22 ind. mic-1. Une prolifération numérique de la méiofaune a été observée lors de son exposition aux doses les plus faibles du contaminant. Ainsi, une valeur moyenne... |
Tipo: Journal Contribution |
Palavras-chave: Meiobenthos; Density; Microcosms; Sediments. |
Ano: 2013 |
URL: http://hdl.handle.net/1834/5907 |
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Moens, T.; Vincx, M.. |
Observations on living estuarine nematodes show that previous feeding type classifications do not accurately represent the trophic structure of an intertidal mudflat in the Westerschelde Estuary (Netherlands). A new scheme with six major nematode feeding guilds is proposed: (1) microvores; (2) ciliate feeders; and (3) deposit feeders sensu stricto are all nematodes without a distinct buccal armature. In the first two groups bacteria and protozoa, respectively are the major particulate food sources, while other items are included in the diet of the third. The three other categories are recognized among the nematodes with a buccal armature: (4) epigrowth feeders; (5) facultative predators; and (6) predators. Diatoms and other microalgae are an important... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biology; Biomass; Carbon; Habits; Habits; Meiobenthos; Water. |
Ano: 1997 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7298 |
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Gyedu-Ababio, T.; Furstenberg, J.P.; Baird, D.J.; Vanreusel, A.. |
Nematodes from the sediments of the Swartkops estuary in Port Elizabeth, South Africa were investigated at 10 selected sites along a salinity gradient in the subtidal region at neap tide. The relation between nematode density, genera, community structure and environmental parameters including concentrations of seven heavy metals, Mn, Ti, Cr, Pb, Fe, Sn and Zn in the sediment were investigated. The nematode community structure was significantly influenced by the chlorophyll a concentration and sediment particle-size distribution. The number of genera had significant negative correlation with chlorophyll a and two heavy metals, Fe and Zn in the sediment. The habitat preferences of the genera were also assessed. A combination of the Shannon-Wiener Diversity... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Check lists; Density; Diversity; Ecology; Meiobenthos; Pollution; Sediment; Sediments; Nematoda [Nematodes]. |
Ano: 1999 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7328 |
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Registros recuperados: 35 | |
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