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Overwintering of Invertebrates in a Shallow Northern Swedish Lake
Author(s) -
Danell Kjell
Publication year - 1981
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19810660606
Subject(s) - chironomidae , overwintering , invertebrate , benthic zone , isopoda , spring (device) , ecology , hydrology (agriculture) , oceanography , environmental science , fishery , geology , larva , biology , crustacean , mechanical engineering , geotechnical engineering , engineering
During two winters, the benthic invertebrates in a shallow northern Swedish lake (66 °N) were studied. The lake is ice‐covered for about 200 days a year. Live Lamellibranchiata, Oligochaeta. Hydracarina, Isopoda, Heteroptera, Cole optera and Diptera were found in samples of ice and of frozen lake‐bottom sediments. During the winter in which the bottom froze deepest, a 70–90% decrease in numbers of live Chironomidae larvae was recorded between the autumn and following early spring.