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Does one community ...
Does one community shape the other? Dragonflies and fish in Swedish lakes
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- Wittwer, Torben (författare)
- Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science,Department of Earth and Ecosystem Sciences, Lund University
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- Sahlén, Göran (författare)
- Högskolan i Halmstad,Bio- och miljösystemforskning (BLESS)
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- Suhling, Frank (författare)
- Institut für Geoökologie, Technische Universität Braunschweig, Braunschweig, Germany
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(creator_code:org_t)
- London : Wiley, 2010
- 2010
- Engelska.
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Ingår i: Insect Conservation and Diversity. - London : Wiley. - 1752-4598 .- 1752-458X. ; 3:2, s. 124-133
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Abstract
Ämnesord
Stäng
- 1. Freshwater communities are often structured by predation. In permanent lentic freshwater habitats dragonfly larvae are major predators which, in return, suffer predation by fish. Antipredator traits vary between the dragonfly species, and the dragonfly communities are therefore shaped by the presence of fish. But fish communities vary, and as different fish species affect dragonflies in different ways, the species composition of the fish community may affect the composition of the dragonfly community. 2. We sampled dragonfly larvae in 24 lakes with a known fish stock in south-western Sweden, and explored the impact of fish as well as vegetation structure on dragonfly communities by means of multivariate analyses. 3. We found that the presence of four fish species affected the community structure of dragonflies. The impact strength depended mainly on the abundance of Perca fluviatilis, with which most dragonfly species were negatively correlated. Many dragonfly species were also positively correlated with the occurrence of at least one fish species, which may reflect similar habitat requirements or imply indirect positive effects of these fish species. 4. Of the 24 recorded dragonfly species, four did not occur in lakes dominated by P. fluviatilis, whereas only one species was lacking in lakes dominated by Rutilus rutilus. The dragonfly species diversity was higher in R. rutilus lakes than in P. fluviatilis lakes. 5. Our results suggest that the fish species composition is a major determinant of the dragonfly community, which in turn will influence the lower trophic levels.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- Odonata
- predation
- trophic interactions
- analysis
- multivariate
- fish
- Antipredator traits
- community composition
- NATURAL SCIENCES
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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