NDLI: Unusual reaction of diatom assemblage on climate changes during the last millennium: a record from Spitsbergen lake

Content Provider	Springer Nature Link
Author	Sienkiewicz, Elwira Gąsiorowski, Michał Migała, Krzysztof
Copyright Year	2017
Abstract	A sediment core from the Arctic Revvatnet (Hornsund area, SW Spitsbergen, Svalbard) provided data on environmental changes over the last 3100 years. Diatom analysis showing the domination of planktonic Cyclotella forms suggested good edaphic conditions until the middle of the nineteenth century, even during the Little Ice Age. A thermally stratified and relatively stable water column with good mixing allowed small, less heavily silicified Cyclotella sensu lato to develop during this time. The climate warming at the beginning of the twentieth century induced intensification of erosion processes in the catchment of the lake and caused an increase in the sedimentation rate. These processes have caused a lack of thermal stratification by disturbances in the water column and an increase of nutrients, consequently driving changes in the diatom species composition, which became dominated by benthic forms. In this period, almost all planktonic taxa disappeared or abruptly decreased in frequency. Higher temperatures accelerated the melting of nearby glaciers, which caused an increase in the activity of diatoms typical of running waters. Also a few Cladocera species appeared at the first time in the youngest samples.
Starting Page	73
Ending Page	87
Page Count	15
File Format	PDF
ISSN	09212728
Journal	Journal of Paleolimnology
Volume Number	58
Issue Number	1
e-ISSN	15730417
Language	English
Publisher	Springer Netherlands
Publisher Date	2017-03-28
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Climate warming High Arctic Svalbard Diatoms Chrysophyceae Isotopic data Paleontology Sedimentology Climate Change Physical Geography Freshwater & Marine Ecology Geology
Content Type	Text
Resource Type	Article
Subject	Earth-Surface Processes Aquatic Science

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