Skip to Main Content
Response of benthic macroinvertebrates to whole-lake, non-native fish removals in mid-elevation lakes of the Trinity Alps, CaliforniaAuthor(s): Karen Pope; Erin C. Hannelly
Source: Hydrobiologia. 714: 201-215
Publication Series: Scientific Journal (JRNL)
Station: Pacific Southwest Research Station
Download Publication (351.33 KB)
DescriptionIntroduced fish reduce the abundance and diversity of native aquatic fauna, but the effect can be reduced in complex habitats. We manipulated fish populations in forested mountain lakes to determine whether or not fish affected benthic macroinvertebrate composition across lakes with differing habitat complexity. We compared abundance, biomass, body-length, and community structure of benthic macroinvertebrates from 16 lakes with three treatments (fish stocked, suspended stocking, fish removed) and unstocked fishless “controls.” Over four years, we assessed the relative importance of fish and environmental variables influencing the composition of benthic macroinvertebrates. Control lakes had the greatest overall abundance of macroinvertebrates when chironomid midges were excluded. Abundances of insects in the clinger/swimmer functional group and caddisflies were greatest in the control lakes but were primarily influenced by habitat variables including the availability of aquatic vegetation and wood. Total biomass and mean body length of macroinvertebrates were not affected by treatment. Taxon richness of macroinvertebrates was about 40% greater in the control lakes compared to the treatment lakes but did not differ among treatments. Our results suggest that fish reduce susceptible macroinvertebrate richness and abundances, but that changes associated with alterations of fish composition are confounded by other factors in complex lake habitats.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationPope, K.L.; Hannelly, E.C. 2013. Response of benthic macroinvertebrates to whole-lake, non-native fish removals in mid-elevation lakes of the Trinity Alps, California. Hydrobiologia. 714: 201-215.
KeywordsAquatic insects, introduced trout, habitat complexity, Libellula, Chironomidae, Klamath Mountains
- Changes in aquatic insect emergence in response to whole-lake experimental manipulations of introduced trout
- Resistance and resilience of alpine lake fauna to fish introductions
- Effects of forest fire on headwater stream macroinvertebrate communities in eastern Washington, U.S.A.
XML: View XML