Differential effects of various types of disturbances on the structure of nematode assemblages: an experimental approach
Nothing is known about the structure of free-living marine nematode communities in the high Antarctic. Our attempt at surveying this numerically most abundant meiobenthic taxon along the continental shelf and slope (200 to 2000 m) furnished information on generic, trophic and age composition in 2 re...
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ftmurdochunivall:oai:alma.61MUN_INST:11136493670007891 2024-09-15T17:46:10+00:00 Differential effects of various types of disturbances on the structure of nematode assemblages: an experimental approach Schratzberger, M. Warwick, R.M. 1999 pdf http://www.int-res.com/articles/meps/181/m181p227.pdf https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Differential-effects-of-various-types-of/991005544954307891 https://researchportal.murdoch.edu.au/view/delivery/61MUN_INST/12136493660007891/13136803240007891 eng eng Inter-Research ispartof: Marine Ecology Progress Series spage 227 epage 236 vol 181 0171-8630 http://www.int-res.com/articles/meps/181/m181p227.pdf 991005544954307891 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Differential-effects-of-various-types-of/991005544954307891 https://researchportal.murdoch.edu.au/view/delivery/61MUN_INST/12136493660007891/13136803240007891 alma:61MUN_INST/bibs/991005544954307891 © 1999 Inter-Research. Open text Article 1999 ftmurdochunivall 2024-08-15T00:52:47Z Nothing is known about the structure of free-living marine nematode communities in the high Antarctic. Our attempt at surveying this numerically most abundant meiobenthic taxon along the continental shelf and slope (200 to 2000 m) furnished information on generic, trophic and age composition in 2 regions in the Weddell Sea (Kapp Norvegia, 6 stations, 71-72 °S, 12-13 °W; Halley Bay, 11 stations, 74-75 °S, 25-29 °W). A total of 7300 nematode identifications to generic level were analyzed by means of a variety of statistical techniques. The spatial structure indicated the existence of 4 major nematode genus associations colonizing the upper slope, downslope, Halley shelf and a muted habitat consisting of shelf break and Kapp Norvegia shelf. Dominated by genera like Sabatiena, Molgolaimus, Microlaimus, Monhystera, Daptonema, Leptolaimus, Acantholaimus and Dichromadora, these habitats often contained distinct associations of less abundant genera. The trophically diverse communities exhibited an equal sharing of epistrate, nonselective and selective deposit feeders, with a slight dominance of the first feeding category. Each feeding guild was considered in light of the correlations with microbial food and fresh versus decomposing organic matter, leading to the conclusion that the applied classification does not adequately explain the trophic status of the deep-water communities. Global-scale comparisons with literature data indicated the broad geographical distribution of predominant nematode taxa and a lack of Antarctic endemism. Only a weak separation of the entire nematode communities on a geographical basis was suggested by multivariate techniques. Although ocean-wide comparison was hampered by limited comparable literature data, diversity indices scored high and surpassed the Arctic bathyal assemblage The major agents behind the observed patterns involved sediment grain size and food content, operating over different scales. Depth per se had no major effect. Underlying mechanisms included water-column ... Article in Journal/Newspaper Antarc* Antarctic Weddell Sea Murdoch University Research Portal |
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Open Polar |
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Murdoch University Research Portal |
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ftmurdochunivall |
language |
English |
description |
Nothing is known about the structure of free-living marine nematode communities in the high Antarctic. Our attempt at surveying this numerically most abundant meiobenthic taxon along the continental shelf and slope (200 to 2000 m) furnished information on generic, trophic and age composition in 2 regions in the Weddell Sea (Kapp Norvegia, 6 stations, 71-72 °S, 12-13 °W; Halley Bay, 11 stations, 74-75 °S, 25-29 °W). A total of 7300 nematode identifications to generic level were analyzed by means of a variety of statistical techniques. The spatial structure indicated the existence of 4 major nematode genus associations colonizing the upper slope, downslope, Halley shelf and a muted habitat consisting of shelf break and Kapp Norvegia shelf. Dominated by genera like Sabatiena, Molgolaimus, Microlaimus, Monhystera, Daptonema, Leptolaimus, Acantholaimus and Dichromadora, these habitats often contained distinct associations of less abundant genera. The trophically diverse communities exhibited an equal sharing of epistrate, nonselective and selective deposit feeders, with a slight dominance of the first feeding category. Each feeding guild was considered in light of the correlations with microbial food and fresh versus decomposing organic matter, leading to the conclusion that the applied classification does not adequately explain the trophic status of the deep-water communities. Global-scale comparisons with literature data indicated the broad geographical distribution of predominant nematode taxa and a lack of Antarctic endemism. Only a weak separation of the entire nematode communities on a geographical basis was suggested by multivariate techniques. Although ocean-wide comparison was hampered by limited comparable literature data, diversity indices scored high and surpassed the Arctic bathyal assemblage The major agents behind the observed patterns involved sediment grain size and food content, operating over different scales. Depth per se had no major effect. Underlying mechanisms included water-column ... |
format |
Article in Journal/Newspaper |
author |
Schratzberger, M. Warwick, R.M. |
spellingShingle |
Schratzberger, M. Warwick, R.M. Differential effects of various types of disturbances on the structure of nematode assemblages: an experimental approach |
author_facet |
Schratzberger, M. Warwick, R.M. |
author_sort |
Schratzberger, M. |
title |
Differential effects of various types of disturbances on the structure of nematode assemblages: an experimental approach |
title_short |
Differential effects of various types of disturbances on the structure of nematode assemblages: an experimental approach |
title_full |
Differential effects of various types of disturbances on the structure of nematode assemblages: an experimental approach |
title_fullStr |
Differential effects of various types of disturbances on the structure of nematode assemblages: an experimental approach |
title_full_unstemmed |
Differential effects of various types of disturbances on the structure of nematode assemblages: an experimental approach |
title_sort |
differential effects of various types of disturbances on the structure of nematode assemblages: an experimental approach |
publisher |
Inter-Research |
publishDate |
1999 |
url |
http://www.int-res.com/articles/meps/181/m181p227.pdf https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Differential-effects-of-various-types-of/991005544954307891 https://researchportal.murdoch.edu.au/view/delivery/61MUN_INST/12136493660007891/13136803240007891 |
genre |
Antarc* Antarctic Weddell Sea |
genre_facet |
Antarc* Antarctic Weddell Sea |
op_relation |
ispartof: Marine Ecology Progress Series spage 227 epage 236 vol 181 0171-8630 http://www.int-res.com/articles/meps/181/m181p227.pdf 991005544954307891 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Differential-effects-of-various-types-of/991005544954307891 https://researchportal.murdoch.edu.au/view/delivery/61MUN_INST/12136493660007891/13136803240007891 alma:61MUN_INST/bibs/991005544954307891 |
op_rights |
© 1999 Inter-Research. Open |
_version_ |
1810494145155825664 |