Seasonal periodicity of planktonic desmids in oligotrophic lake Grane Langsø, Denmark

Autor:	Nygaard, Gunnar
Zdroj:	Hydrobiologia; March 1991, Vol. 211 Issue: 3 p195-226, 32p
Abstrakt:	60 desmids were identified from plankton samples collected during 20 years, bimonthly, or monthly in 5 of the years. Only 5 desmids were perennial, performing cell divisions in a frozen lake at PAR at only 5 cal cm −2 day −1, below ice-cover. The greatest number of desmids per 100 ml lake water was found in September; it never exceeded 150. Owing to a concentration of free CO2 of only 0.02 mM l−1 and a HCO
Databáze:	Supplemental Index
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