Evaluating environmental drivers of spatial variability in free-living nematode assemblages along the Portuguese margin
Understanding processes responsible for shaping biodiversity patterns on continental margins is an important requirement for comprehending anthropogenic impacts in these environments and further management of biodiversity. Continental margins perform crucial functions linked to key ecological proces...
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ftunivgent:oai:archive.ugent.be:8516183 2023-06-11T04:17:03+02:00 Evaluating environmental drivers of spatial variability in free-living nematode assemblages along the Portuguese margin Lins Pereira, Lidia Leliaert, Frédérik Riehl, Torben Pinto Ramalho, Sofia Alfaro Cordova, Eliana Morgado Esteves, André Vanreusel, Ann 2017 application/pdf https://biblio.ugent.be/publication/8516183 http://hdl.handle.net/1854/LU-8516183 https://doi.org/10.5194/bg-14-651-2017 https://biblio.ugent.be/publication/8516183/file/8606327 eng eng https://biblio.ugent.be/publication/8516183 http://hdl.handle.net/1854/LU-8516183 http://dx.doi.org/10.5194/bg-14-651-2017 https://biblio.ugent.be/publication/8516183/file/8606327 No license (in copyright) info:eu-repo/semantics/openAccess BIOGEOSCIENCES ISSN: 1726-4189 Biology and Life Sciences Earth and Environmental Sciences WESTERN IBERIAN MARGIN DEEP-SEA BENTHOS SPECIES-DIVERSITY SOUTHERN-OCEAN CONTINENTAL-SHELF NE ATLANTIC COMMUNITY STRUCTURE MARINE NEMATODES NAZARE CANYON MIXED MODELS journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2017 ftunivgent https://doi.org/10.5194/bg-14-651-2017 2023-05-10T22:20:29Z Understanding processes responsible for shaping biodiversity patterns on continental margins is an important requirement for comprehending anthropogenic impacts in these environments and further management of biodiversity. Continental margins perform crucial functions linked to key ecological processes which are mainly structured by surface primary productivity and particulate organic matter flux to the seafloor, but also by heterogeneity in seafloor characteristics. However, to what extent these processes control local and regional biodiversity remains unclear. In this study, two isobathic parallel transects located at the shelf break (300-400 m) and upper slope (1000 m) of the western Iberian margin were used to test how food input and sediment heterogeneity affect nematode diversity independently from the spatial factors geographical distance and water depth. We also examined the potential role of connectedness between both depth transects through molecular phylogenetic analyses. Regional generic diversity and turnover were investigated at three levels: within a station, between stations from the same depth transect, and between transects. High variability in food availability and high sediment heterogeneity at the shelf-break transect were directly linked to high diversity within stations and higher variation in community structure across stations compared to the upper slope transect. Contrastingly, environmental factors (food availability and sediment) did not vary significantly between stations located at the upper slope, and this lack of differences were also reflected in a low community turnover between these deeper stations. Finally, differences in nematode communities between both transects were more pronounced than differences within each of the isobathic transects, but these changes were paralleled by the previously mentioned environmental changes. These results suggest that changes in community structure are mainly dictated by environmental factors rather than spatial differences at the western ... Article in Journal/Newspaper Southern Ocean Ghent University Academic Bibliography Southern Ocean Biogeosciences 14 3 651 669 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences Earth and Environmental Sciences WESTERN IBERIAN MARGIN DEEP-SEA BENTHOS SPECIES-DIVERSITY SOUTHERN-OCEAN CONTINENTAL-SHELF NE ATLANTIC COMMUNITY STRUCTURE MARINE NEMATODES NAZARE CANYON MIXED MODELS |
spellingShingle |
Biology and Life Sciences Earth and Environmental Sciences WESTERN IBERIAN MARGIN DEEP-SEA BENTHOS SPECIES-DIVERSITY SOUTHERN-OCEAN CONTINENTAL-SHELF NE ATLANTIC COMMUNITY STRUCTURE MARINE NEMATODES NAZARE CANYON MIXED MODELS Lins Pereira, Lidia Leliaert, Frédérik Riehl, Torben Pinto Ramalho, Sofia Alfaro Cordova, Eliana Morgado Esteves, André Vanreusel, Ann Evaluating environmental drivers of spatial variability in free-living nematode assemblages along the Portuguese margin |
topic_facet |
Biology and Life Sciences Earth and Environmental Sciences WESTERN IBERIAN MARGIN DEEP-SEA BENTHOS SPECIES-DIVERSITY SOUTHERN-OCEAN CONTINENTAL-SHELF NE ATLANTIC COMMUNITY STRUCTURE MARINE NEMATODES NAZARE CANYON MIXED MODELS |
description |
Understanding processes responsible for shaping biodiversity patterns on continental margins is an important requirement for comprehending anthropogenic impacts in these environments and further management of biodiversity. Continental margins perform crucial functions linked to key ecological processes which are mainly structured by surface primary productivity and particulate organic matter flux to the seafloor, but also by heterogeneity in seafloor characteristics. However, to what extent these processes control local and regional biodiversity remains unclear. In this study, two isobathic parallel transects located at the shelf break (300-400 m) and upper slope (1000 m) of the western Iberian margin were used to test how food input and sediment heterogeneity affect nematode diversity independently from the spatial factors geographical distance and water depth. We also examined the potential role of connectedness between both depth transects through molecular phylogenetic analyses. Regional generic diversity and turnover were investigated at three levels: within a station, between stations from the same depth transect, and between transects. High variability in food availability and high sediment heterogeneity at the shelf-break transect were directly linked to high diversity within stations and higher variation in community structure across stations compared to the upper slope transect. Contrastingly, environmental factors (food availability and sediment) did not vary significantly between stations located at the upper slope, and this lack of differences were also reflected in a low community turnover between these deeper stations. Finally, differences in nematode communities between both transects were more pronounced than differences within each of the isobathic transects, but these changes were paralleled by the previously mentioned environmental changes. These results suggest that changes in community structure are mainly dictated by environmental factors rather than spatial differences at the western ... |
format |
Article in Journal/Newspaper |
author |
Lins Pereira, Lidia Leliaert, Frédérik Riehl, Torben Pinto Ramalho, Sofia Alfaro Cordova, Eliana Morgado Esteves, André Vanreusel, Ann |
author_facet |
Lins Pereira, Lidia Leliaert, Frédérik Riehl, Torben Pinto Ramalho, Sofia Alfaro Cordova, Eliana Morgado Esteves, André Vanreusel, Ann |
author_sort |
Lins Pereira, Lidia |
title |
Evaluating environmental drivers of spatial variability in free-living nematode assemblages along the Portuguese margin |
title_short |
Evaluating environmental drivers of spatial variability in free-living nematode assemblages along the Portuguese margin |
title_full |
Evaluating environmental drivers of spatial variability in free-living nematode assemblages along the Portuguese margin |
title_fullStr |
Evaluating environmental drivers of spatial variability in free-living nematode assemblages along the Portuguese margin |
title_full_unstemmed |
Evaluating environmental drivers of spatial variability in free-living nematode assemblages along the Portuguese margin |
title_sort |
evaluating environmental drivers of spatial variability in free-living nematode assemblages along the portuguese margin |
publishDate |
2017 |
url |
https://biblio.ugent.be/publication/8516183 http://hdl.handle.net/1854/LU-8516183 https://doi.org/10.5194/bg-14-651-2017 https://biblio.ugent.be/publication/8516183/file/8606327 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
BIOGEOSCIENCES ISSN: 1726-4189 |
op_relation |
https://biblio.ugent.be/publication/8516183 http://hdl.handle.net/1854/LU-8516183 http://dx.doi.org/10.5194/bg-14-651-2017 https://biblio.ugent.be/publication/8516183/file/8606327 |
op_rights |
No license (in copyright) info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-14-651-2017 |
container_title |
Biogeosciences |
container_volume |
14 |
container_issue |
3 |
container_start_page |
651 |
op_container_end_page |
669 |
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1768375853204373504 |