Autor: |
Jouko Sarvala, Sari Halsinaho |
Rok vydání: |
1990 |
Předmět: |
|
Zdroj: |
Acidification in Finland ISBN: 9783642754524 |
DOI: |
10.1007/978-3-642-75450-0_51 |
Popis: |
The abundance and species diversity of crustacean zooplankton in 138 Finnish forest lakes were significantly reduced in lakes with a low pH (< 5.2); especially the abundance and species number of calanoids and Daphnia declined. The impoverishment of zooplankton fauna at low pH was less pronounced in polyhumic lakes, which also harbored much higher abundances of zooplankton than clearwater lakes. Sample size (in terms of individuals studied) had a major effect on the variation of species numbers. In spite of statistically significant relationships, abiotic environmental parameters could explain only a relatively minor fraction of the observed variation of zooplankton community structure; direct and indirect biotic interactions were probably more important. |
Databáze: |
OpenAIRE |
Externí odkaz: |
|