𝔖 Bobbio Scriptorium
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Creating conditions for changes in prey community structure byChaoborusspp. in a lake in Sweden

✍ Scribed by Jan A. E. Stenson

Publisher
Springer
Year
1990
Tongue
English
Weight
675 KB
Volume
198
Category
Article
ISSN
1573-5141

No coin nor oath required. For personal study only.

✦ Synopsis

In Lake Gardsjon (Southwest Sweden), liming as an experimental improvement of living conditions for pelagic algae, resulted in a significant increase of algal biomass and a reduction of mean cell size . The algal development was beneficial for small sized filter feeding zooplankton, particularly rotifers, which showed a significant increase . The increase in abundance of small sized zooplankton created better food conditions for the smaller instars, and thus a much better overall survival of Chaoborus larvae . The resulting, 6-7 times larger population of Chaoborus larvae significantly changed the structure of the crustacean zooplankton community . Bosmina coregoni, the fastest swimmer of the crustacean species suffered most and was strongly reduced by the increased predation from Chaoborus . The share of cladocerans decreased, while copepods increased in importance .

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