Sampling information on lysianassoid amphipod crustaceans from the expedition PS82 (ANT-XXIX/9) to the Filchner area, Weddell Sea, Antarctica in 2013/2014


An integrative inventory, combining morphological identifications with DNA barcoding, of the amphipod scavenging fauna (Lysianassoidea) of the Filchner area in the south-eastern Weddell Sea is provided here. This understudied area, neighbouring the Filchner-Ronne Ice Shelf, represents a key oceanographic region for the global circulation but is, however, likely to be impacted by a myriad of consequences of warming waters. It also represents a biological hotspot and therefore, this area has been recently included as a candidate for a Marine Protected Area in the Southern Ocean (Weddell Sea MPA). Over 4400 lysianassoids were investigated for species richness and abundances at 20 different stations using different sampling devices, including the southernmost baited traps deployed so far (76°S). A high species richness was observed: 29 morphospecies of which five were new to science. Molecular species delimitation methods indicated the presence of 42 lineages; for four species, several (cryptic) lineages were found. More than 96% of the lysianassoids collected with a baited trap belonged to the species Orchomenella pinguides s.l. The diversity of the amphipod scavenger guild in this ice-bound ecosystem of the Weddell Sea is discussed in the light of bottom-up selective forces. Harbouring spawning and nursery grounds for silverfish and icefishes, which are preyed upon by seal species, abundant fish and mammalian food falls are likely to represent the major food for scavengers in this southernmost part of the Weddell Sea. Finally, the importance of such biodiversity surveys to better understand the ecological role of scavengers in this system is highlighted.

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Metadata Access
Creator Havermans, Charlotte
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2017
Funding Reference German Science Foundation, 5472008
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 228 data points
Discipline Earth System Research
Spatial Coverage (-37.709W, -77.724S, -10.475E, -70.928N); Weddell Sea
Temporal Coverage Begin 2014-01-03T12:11:00Z
Temporal Coverage End 2014-02-16T17:28:00Z