Šumarski list, Vol. 137 No. 11-12, 2013.
Izvorni znanstveni članak
EFFECTS OF BEAVER DAMS ON INVERTEBRATE DRIFT IN FOREST STREAMS
Andreas Redin
; Department of Wildlife, Fish, and Environmental Studies, SLU, Umea°, Sweden
Göran Sjöberg
orcid.org/0000-0002-9908-0914
; Department of Wildlife, Fish, and Environmental Studies, SLU, Umea°, Sweden
Sažetak
Abstract
We aimed to assess the effects of beaver dams on the invertebrate drift fauna in five central Swedish boreal forest streams. Each stream was sampled once during the autumn, with drift traps placed upstream and downstream of the beaver dams. Drift densities (numbers/100 m3 water) were calculated. The invertebrates were determined, dried and weighed. No significant differences were noted in total drift densities or in the drift densities of pelagic species. The drift densities of benthic species were higher upstream of the dam, mainly because Ephemeroptera were more abundant in the upstream part. No significant difference was observed in diversity or dry weight. The functional feeding group ratio: filtering collectors/gathering collectors was significantly higher downstream of the dam.
Ključne riječi
stream invertebrates; drift fauna; beaver dam; beaver pond
Hrčak ID:
112498
URI
Datum izdavanja:
31.12.2013.
Posjeta: 2.126 *