Macrofaunal diversity gradients in Antarctic rocky benthic communities: Effects of glaciers and depth
Western Antarctic shows one of the fastest responses to climate change on Earth. Glacier meltdown and freshening are perhaps the most conspicuous evidence of anthropogenic impacts, that together with ice scouring can strongly modify benthic communities. The spatial extension of these impacts has bee...
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crpeerj:10.7287/peerj.preprints.26846v1 2024-06-02T07:58:13+00:00 Macrofaunal diversity gradients in Antarctic rocky benthic communities: Effects of glaciers and depth Pardo, Luis Miguel Garrido, Ignacio Bruning, Paulina Carrier, Charlotte Reveco, Rossana Valdivia, Nelson 2018 http://dx.doi.org/10.7287/peerj.preprints.26846v1 https://peerj.com/preprints/26846v1.pdf https://peerj.com/preprints/26846v1.xml https://peerj.com/preprints/26846v1.html unknown PeerJ http://creativecommons.org/licenses/by/4.0/ posted-content 2018 crpeerj https://doi.org/10.7287/peerj.preprints.26846v1 2024-05-07T14:14:39Z Western Antarctic shows one of the fastest responses to climate change on Earth. Glacier meltdown and freshening are perhaps the most conspicuous evidence of anthropogenic impacts, that together with ice scouring can strongly modify benthic communities. The spatial extension of these impacts has been rarely explored in rocky subtidal environments. This study describes changes in benthic communities across glacier and bathymetric gradient in Fildes Bay, Antarctica. Suction samples were taken from four sites at increasing distance from the Collin glacier (0 - 2.5 – 5 - 7 km) and three depths (5 – 10 - 15 m). Macrofaunal diversity increased with depth across all distances from the glacier; these changes were associated with the increase in diversity of amphipods and echinoderms. The lowest and highest species diversity occurred at zero and two km from the glacier, indicating a strong, but localized, glacier effect. Variation in salinity tolerance and the abundance of key habitat forming algae could explain the spatial variation in these communities. This result remarks the importance of facilitation as a structuring force in Antarctic benthic communities. We suggest that the fate of communities in future climate-change scenarios will depend on how habitat-forming species respond to these environmental changes. Other/Unknown Material Antarc* Antarctic Antarctica PeerJ Publishing Antarctic Fildes ENVELOPE(-58.817,-58.817,-62.217,-62.217) |
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PeerJ Publishing |
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description |
Western Antarctic shows one of the fastest responses to climate change on Earth. Glacier meltdown and freshening are perhaps the most conspicuous evidence of anthropogenic impacts, that together with ice scouring can strongly modify benthic communities. The spatial extension of these impacts has been rarely explored in rocky subtidal environments. This study describes changes in benthic communities across glacier and bathymetric gradient in Fildes Bay, Antarctica. Suction samples were taken from four sites at increasing distance from the Collin glacier (0 - 2.5 – 5 - 7 km) and three depths (5 – 10 - 15 m). Macrofaunal diversity increased with depth across all distances from the glacier; these changes were associated with the increase in diversity of amphipods and echinoderms. The lowest and highest species diversity occurred at zero and two km from the glacier, indicating a strong, but localized, glacier effect. Variation in salinity tolerance and the abundance of key habitat forming algae could explain the spatial variation in these communities. This result remarks the importance of facilitation as a structuring force in Antarctic benthic communities. We suggest that the fate of communities in future climate-change scenarios will depend on how habitat-forming species respond to these environmental changes. |
format |
Other/Unknown Material |
author |
Pardo, Luis Miguel Garrido, Ignacio Bruning, Paulina Carrier, Charlotte Reveco, Rossana Valdivia, Nelson |
spellingShingle |
Pardo, Luis Miguel Garrido, Ignacio Bruning, Paulina Carrier, Charlotte Reveco, Rossana Valdivia, Nelson Macrofaunal diversity gradients in Antarctic rocky benthic communities: Effects of glaciers and depth |
author_facet |
Pardo, Luis Miguel Garrido, Ignacio Bruning, Paulina Carrier, Charlotte Reveco, Rossana Valdivia, Nelson |
author_sort |
Pardo, Luis Miguel |
title |
Macrofaunal diversity gradients in Antarctic rocky benthic communities: Effects of glaciers and depth |
title_short |
Macrofaunal diversity gradients in Antarctic rocky benthic communities: Effects of glaciers and depth |
title_full |
Macrofaunal diversity gradients in Antarctic rocky benthic communities: Effects of glaciers and depth |
title_fullStr |
Macrofaunal diversity gradients in Antarctic rocky benthic communities: Effects of glaciers and depth |
title_full_unstemmed |
Macrofaunal diversity gradients in Antarctic rocky benthic communities: Effects of glaciers and depth |
title_sort |
macrofaunal diversity gradients in antarctic rocky benthic communities: effects of glaciers and depth |
publisher |
PeerJ |
publishDate |
2018 |
url |
http://dx.doi.org/10.7287/peerj.preprints.26846v1 https://peerj.com/preprints/26846v1.pdf https://peerj.com/preprints/26846v1.xml https://peerj.com/preprints/26846v1.html |
long_lat |
ENVELOPE(-58.817,-58.817,-62.217,-62.217) |
geographic |
Antarctic Fildes |
geographic_facet |
Antarctic Fildes |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.7287/peerj.preprints.26846v1 |
_version_ |
1800741489985191936 |