Community dynamics of nematodes after Larsen ice-shelf collapse in the eastern Antarctic Peninsula

Free-living marine nematode communities of the Larsen B embayment at the eastern Antarctic Peninsula were investigated to provide insights on their response and colonisation rate after large-scale ice-shelf collapse. This study compares published data on the post-collapse situation from 2007 with ne...

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Bibliographic Details
Published in:Ecology and Evolution
Main Authors: Hauquier, Freija, Ballesteros-Redondo, Laura, Gutt, Julian, Vanreusel, Ann
Format: Article in Journal/Newspaper
Language:English
Published: 2016
Subjects:
Biology and Life Sciences
biodiversity
colonisation
Larsen B
ice-shelf collapse
community dynamics
marine free-living Nematoda
Microlaimus
Halomonhystera
LIVING MARINE NEMATODES
CLIMATE-CHANGE
GENETIC-STRUCTURE
SOUTHERN-OCEAN
B EMBAYMENTS
WEDDELL SEA
MEIOFAUNA
SEDIMENTS
ASSEMBLAGES
DIVERSITY
Antarctic
Southern Ocean
Antarctic Peninsula
Weddell Sea
Weddell
Larsen Ice Shelf
Antarc*
Ice Shelf
Online Access:https://biblio.ugent.be/publication/7023066
http://hdl.handle.net/1854/LU-7023066
https://doi.org/10.1002/ece3.1869
https://biblio.ugent.be/publication/7023066/file/7045114
Description
Summary:Free-living marine nematode communities of the Larsen B embayment at the eastern Antarctic Peninsula were investigated to provide insights on their response and colonisation rate after large-scale ice-shelf collapse. This study compares published data on the post-collapse situation from 2007 with new material from 2011, focusing on two locations in the embayment that showed highly divergent communities in 2007 and that are characterised by a difference in timing of ice-shelf breakup. Data from 2007 exposed a more diverse community at outer station B.South, dominated by the genus Microlaimus. On the contrary, station B.West in the inner part of Larsen B was poor in both numbers of individuals and genera, with dominance of a single Halomonhystera species. Re-assessment of the situation in 2011 showed that communities at both stations diverged even more, due to a drastic increase in Halomonhystera at B.West compared to relatively little change at B.South. On a broader geographical scale, it seems that B.South gradually starts resembling other Antarctic shelf communities, although absence of the genus Sabatieria and high abundance of Microlaimus still set it apart nine years after the main Larsen B collapse. In contrast, thriving of Halomonhystera at B.West further separates its community from other Antarctic shelf areas.

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