Assemblages and habitat preferences of soft bottom Antarctic Amphipoda: Admiralty Bay case study

Jażdżewska, Anna; Siciński, Jacek

doi:10.1007/s00300-017-2107-2

Cited by 8 publications

(2 citation statements)

References 67 publications

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“…Water depth is proposed to regulate benthic food input, its quantity and quality, by modifying particle residence time in the water column (Smith et al 2006), thus also regulating benthic distribution. This could explain why some TUs such as polychaetes, isopods, amphi pods, and bryozoans have been described as water-depth-dependent groups on Antarc-tic shelves (Elling sen et al 2007, Saiz et al 2008, Jazdzewska & Sicinski 2017. In contrast, e.g.…”

Section: Environmental Drivers For Benthic Distributionmentioning

confidence: 99%

Benthic communities of the Filchner Region (Weddell Sea, Antarctica)

Pineda-Metz¹,

Isla²,

Gerdes³

2019

Mar. Ecol. Prog. Ser.

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Due to extreme pack ice, the Filchner Region in the southern Weddell Sea is one of the least studied regions on the planet. Here, we provide a detailed description of the benthic communities of this high-Antarctic ecosystem, and assess the relationship between environmental factors and benthic distribution patterns. Fieldwork was performed in the austral summers of 2013− 14 and 2015−16 during the R/V 'Polarstern' cruises PS82 and PS96. Using a combination of multibox corer (MBC) and seabed image data from 37 stations (water depths 243−1217 m), we differentiated 6 station groups. While 1 of these groups was comprised of a single station, the other 5 groups represented distinct benthic communities. Three of these correspond to the previously described Eastern Shelf, Southern Shelf, and Southern Trench communities. However, we found distribution shifts and MBC abundance and biomass reductions when comparing our results with earlier studies. The other 2 groups have novel characteristics and are presented here as an Ice/Ice Shelf Water-related community and a Continental slope community. Water depth in combination with 2 or 3 other environmental variables (out of 7 available) explained < 30% of the benthic distribution and composition. We found a tighter relationship between water mass circulation and spatial distribution of the communities; we suggest using water-mass-related characteristics (e.g. productivity regimes, water currents) to better explain benthic spatial distribution patterns.

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Section: Environmental Drivers For Benthic Distributionmentioning

confidence: 99%

Benthic communities of the Filchner Region (Weddell Sea, Antarctica)

Pineda-Metz¹,

Isla²,

Gerdes³

2019

Mar. Ecol. Prog. Ser.

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“…This study investigated amphipod FD patterns with reference to the taxonomic diversity patterns in the GoK MNPS. Most amphipod species are mobile in intertidal habitats with relatively high swimming abilities, so they can freely move between the areas rich in food and also to protect them from predation (Jażdżewska and Siciński, 2017). In the current study, mobile epifaunal amphipod abundances were observed to be higher at the LW of the all intertidal transects except T-I.…”

Section: Discussionmentioning

confidence: 99%

Diversity and Functional Patterns of Benthic Amphipods in the Coralline Intertidal Zones of a Marine National Park, India

et al. 2020

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Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

et al. 2017

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Isopods belong to the most speciose groups of the Antarctic benthic fauna, although the knowledge on their diversity and small-scale distribution patterns is still limited. Here we analyze the diversity of the isopod fauna in the Admiralty Bay, a glacial fjord on the King George Island. The basin is located in the region of the Antarctic Peninsula, the fastest warming area of the Southern Ocean. The study provides important baseline data for future research, particularly with respect to temporal fluctuations in benthic fauna, associated with global changes observed in that part of the world. Forty species of isopods representing 19 families were recorded on the soft bottom of the Admiralty Bay. The analyses were based on 99 quantitative samples collected, within the 20-502-m depth range, with a 0.1 m 2 van Veen grab. The materials for the analyses were obtained in the austral summer seasons of 1984/1985 and 1985/1986. The data revealed a high number of isopod species occurring at a low abundance, the mean abundance amounting to 4.8 ± 8.6 ind./0.1 m 2 . Most of the species occurred at low abundances, 25% of the species being represented by singletons. Caecognathia polaris, the most abundant species, showed the mean abundance of merely 1.2 ± 4.2 ind./0.1 m 2 . Species richness, diversity and abundance of the isopod fauna were much higher in the central basin of the Admiralty Bay than in the Ezcurra Inlet, an area affected by a strong disturbance of glacial origin.

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Assemblages and habitat preferences of soft bottom Antarctic Amphipoda: Admiralty Bay case study

Cited by 8 publications

References 67 publications

Benthic communities of the Filchner Region (Weddell Sea, Antarctica)

Benthic communities of the Filchner Region (Weddell Sea, Antarctica)

Diversity and Functional Patterns of Benthic Amphipods in the Coralline Intertidal Zones of a Marine National Park, India

Low abundance and high species richness: the structure of the soft-bottom isopod fauna of a West Antarctic glacial fjord

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