Invertebrate communities of the High Arctic ponds in Hornsund
Luoto, T., Oksman, M., & Ojala, A. E. (2016). Invertebrate communities of the High Arctic ponds in Hornsund. Polish Polar Research, 37(1), 105-119. https://doi.org/10.1515/popore-2016-0003
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Polish Polar ResearchDate
2016Copyright
© the Authors, 2016. This is an open access article publisher under the terms of the Creative Commons Attribution-Non-Commercial-NoDerivs license.
How environmental conditions influence current distributions of organisms at the
local scale in sensitive High Arctic freshwaters is essential to understand in order to better
comprehend the cascading consequences of the ongoing climate change. This knowledge is
also important background data for paleolimnological assessments of long−term limno−
ecological changes and in describing the range of environmental variability. We sampled five
limnologically different freshwater sites from the Fuglebergsletta marine terrace in Horn−
sund, southern Svalbard, for aquatic invertebrates. Invertebrate communities were tested
against non−climatic environmental drivers as limnological and catchment variables. A clear
separation in the communities between the sites was observed. The largest and deepest lake
was characterized by a diverse Chironomidae community but Cladocera were absent. In a
pond with marine influence, crustaceans, such as Ostracoda, Amphipoda, and calanoid
Copepoda were the most abundant invertebrates. Two nutrient−rich ponds were dominated by
a chironomid, Orthocladius consobrinus, whereas the most eutrophic pond was dominated by
the cladoceran Daphnia pulex, suggesting decreasing diversity along with the trophic status.
Overall, nutrient related variables appeared to have an important influence on the invertebrate
community composition and diversity, the trophic state of the sites being linked with their ex−
posure to geese guano. Other segregating variables included water color, presence/absence of
fish, abundance of aquatic vegetation and lake depth. These results suggest that since most of
these variables are climate−driven at a larger scale, the impacts of the ongoing climate change
will have cumulative effects on aquatic ecosystems.
...
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Polish Academy of Sciences; Walter de Gruyter GmbHISSN Search the Publication Forum
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Except where otherwise noted, this item's license is described as © the Authors, 2016. This is an open access article publisher under the terms of the Creative Commons Attribution-Non-Commercial-NoDerivs license.
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