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Comparative Study
. 2008 Jun;33(1):150-7.
doi: 10.3376/1081-1710(2008)33[150:comdcp]2.0.co;2.

Comparison of mosquito (Diptera: Culicidae) populations by wetland type and year in the lower river Dalälven region, Central Sweden

M L Schäfer  1 , J O Lundström, E Petersson
Affiliations
Comparative Study

Comparison of mosquito (Diptera: Culicidae) populations by wetland type and year in the lower river Dalälven region, Central Sweden

M L Schäfer et al. J Vector Ecol. 2008 Jun.

Abstract

We studied adult mosquito assemblages in six wetlands, representing three types (wet meadow, alder swamp, and bog), in the lower part of the River Dalälven in Central Sweden during three consecutive years (2000-2002) and evaluated the influence of wetland type and year. Mosquito abundance differed significantly between years but not between wetland types. Mosquito species richness showed no significant variation between years or wetland types. Cluster analysis based on percentage of similarity resulted in three clusters, with high similarity between all wetlands in 2000. Ordination analysis showed that mosquito assemblages were mainly correlated with wetland type and water level increase in the previous month. Hydrological conditions varied between the years and between the wetland types, and our collections also included a year (2000) with extreme flood situations. The floodwater mosquito species Ochlerotatus sticticus was the predominant species with a strong influence on the whole study due to its long-range dispersal ability. The entire region suffered from enormous numbers of Oc. sticticus in 2000. The data from this study provided the basis for the initiation of a mosquito control project in the region.

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