Are the larvae ofPropsilocerus lacustrisKieffer 1923 (Diptera: Chironomidae) favoured by nutrient-rich lakes?
| Autor: | Ryszard Kornijów, Anna Halkiewicz |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Larva Subfossil biology Ecology Sediment Aquatic Science biology.organism_classification Chironomidae chemistry.chemical_compound Pore water pressure chemistry Insect Science Chlorophyll Environmental chemistry parasitic diseases Organic matter Ecology Evolution Behavior and Systematics Trophic level |
| Zdroj: | Aquatic Insects. 29:187-194 |
| ISSN: | 1744-4152 0165-0424 |
| DOI: | 10.1080/01650420701474158 |
| Popis: | The larvae of Propsilocerus lacustris were found at densities ranging from 30 to 150 ind. m−2 in the hypertrophic Lake Syczynskie, eastern Poland. They burrowed in the top 5 cm of soft sediment at a water depth of ca. 1 m along the reed belt. The sediment was well decomposed, with fair contribution of organic matter (16.5 – 31.6%) and of neutral pH (6.5 – 7.7). Concentrations of total phosphorus in the sediments ranged from 1.64 to 5.04 mg g DW−1. The sediment pore water contained cyanobacterial microcystins (1 – 2 μg MC-LR eq. l−1). The analysis of subfossil remains indicates that the larvae appeared in the lake in the middle 1960s, i.e. a few years before the system switched from eutrophy to hypertrophy. Densities increased parallel to the increase in the lake trophic status, estimated as concentrations of organic matter and total chlorophyll in the sediment. The results suggest that P. lacustris, as its close relative P. akamusi, favours nutrient-rich lakes. |
| Databáze: | OpenAIRE |
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