Nematode absolute densities and genus counts from four stations near the Antarctic Peninsula, collected with a multicorer device during POLARSTERN cruise ANT-XXIX/3 in January-March 2013

Marine free-living nematode communities were studied at similar depths (~500m) at two sides of the Antarctic Peninsula, characterised by different environmental and oceanographic conditions. At the Weddell Sea side, benthic communities are influenced by cold deep-water formation and seasonal sea-ice...

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Bibliographic Details
Main Authors: Hauquier, Freija, Durán Suja, Laura, Gutt, Julian, Veit-Köhler, Gritta, Vanreusel, Ann
Format: Dataset
Language:English
Published: PANGAEA 2015
Subjects:
Acantholaimus
Actarjania
Actinonema
Aegialoalaimus
Alaimella
Amphimonhystera
Amphimonhystrella
Anoplostoma
Anticoma
Antomicron
ANT-XXIX/3
Axonolaimus
Bolbolaimus
Calomicrolaimus
Camacolaimus
Campylaimus
Cervonema
Chromadora
Chromadoridae
Chromadorita
Cobbia
Comesa
Comesoma
Comesomatidae
Comment
Counting
compound microscope
Crenopharynx
Cyartonema
Cyatholaimidae
Cylindrolaimus
Daptonema
Date/Time of event
Depth
bottom/max
sediment/rock
top/min
Desmodora
Desmolaimus
Desmolorenzenia
Desmoscolex
Dichromadora
Diplolaimelloides
Diplopeltoides
Doliolaimus
Dorylaimopsis
DP-243
DP-250
Antarctic
Antarctic Peninsula
Drake Passage
The Antarctic
Weddell
Weddell Sea
Antarc*
Sea ice
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.846306
https://doi.org/10.1594/PANGAEA.846306
Description
Summary:Marine free-living nematode communities were studied at similar depths (~500m) at two sides of the Antarctic Peninsula, characterised by different environmental and oceanographic conditions. At the Weddell Sea side, benthic communities are influenced by cold deep-water formation and seasonal sea-ice conditions, whereas the Drake Passage side experiences milder oceanic conditions and strong dynamics of the Antarctic Circumpolar Current. Surface primary productivity contrasted with observed benthic pigment patterns and varied according to the area studied: chlorophyll a concentrations (as a proxy for primary production) were high in the Weddell Sea sediments, but low in the surface waters above; this pattern was reversed in the Drake Passage. Differences between areas were largely mirrored by the nematode communities: nematode densities peaked in Weddell stations and showed deeper vertical occurrence in the sediment, associated with deeper penetration of chlorophyll a. Generic composition did not differ markedly between both areas, but rather showed distinct community shifts with depth in the sediment.

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