Diversity of hard-bottom fauna relative to environmental gradients in Kongsfjorden, Svalbard

Polar research

Bjørn Gulliksen¹  Haakon Hop²  Andrey Voronkov⁴ 

[1] Faculty of BiosciencesFisheries and Economics, University of Tromsø, NO-9037 Tromsø, NorwayCorrespondence;Norwegian Polar InstituteFram Centre, NO-9296 Tromsø, Norway;Faculty of BiosciencesFisheries and Economics, University of Tromsø, NO-9037 Tromsø, Norway;Institute of Marine ResearchPO Box 6404, NO-9294 Tromsø, Norway;Norwegian Polar InstituteFram Centre, NO-9296 Tromsø, Norway

关键词: Zoobenthos;    hard substrata;    Svalbard;    Kongsfjorden;    biodiversity;    environmental gradients;   

DOI  :  10.3402/polar.v32i0.11208

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

A baseline study of hard-bottom zoobenthos in relation to environmental gradients in Kongsfjorden, a glacial fjord in Svalbard, is presented, based on collections from 1996 to 1998. The total species richness in 62 samples from 0 to 30 m depth along five transects was 403 species. Because 32 taxa could not be identified to species level and because 11 species are probably new to science, the total number of identified species was 360. Of these, 47 species are new for Svalbard waters. Bryozoa was the most diverse group. Biogeographic composition revealed features of both Arctic and sub-Arctic properties of the fauna. Species richness, frequency of species occurrence, mean abundance and biomass generally decreased towards the tidal glaciers in inner Kongsfjorden. Among eight environmental factors, depth was most important for explaining variance in the composition of the zoobenthos. The diversity was consistently low at shallow depths, whereas the non-linear patterns of species composition of deeper samples...

【 授权许可】

CC BY-NC