Feeding by black fly (Diptera:Simuliidae) larvae causes downstream losses in phytoplankton, but not bacteria
| Autor: | Jacob Kalff, Jacques Boisvert, Gilbert Cabana, Alice H. Parkes |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Biomass (ecology)
animal structures biology fungi Filter feeder Bacterioplankton STREAMS Aquatic Science Bacillus thuringiensis israelensis biology.organism_classification Animal science parasitic diseases Phytoplankton Botany human activities Microbial loop Black fly Ecology Evolution Behavior and Systematics |
| Zdroj: | Journal of the North American Benthological Society. 23:780-792 |
| ISSN: | 1937-237X 0887-3593 |
| DOI: | 10.1899/0887-3593(2004)023<0780:fbbfdl>2.0.co;2 |
| Popis: | Experimental removal of early instar black fly larvae from 3 oligotrophic lake-outlet streams in southern Quebec showed that larvae reduced phytoplankton biomass, but had little effect on bacterioplankton biomass. The rates of decline in bacterioplankton and phytoplankton biomass with distance downstream from 6 lake outlets were determined before the insecticide Bacillus thuringiensis var. israelensis was used to remove black fly larvae from 3 of the streams. The rates of decline in bacterioplankton and phytoplankton biomass were measured again after the larvae were removed, and the differences in the rates of decline between before and after were used as indicators of the rates of biomass ingestion by the black fly larvae. The proportion of bacterioplankton ingested/m stream length was |
| Databáze: | OpenAIRE |
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