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Lower abundance of flood water mosquito larvae in managed wet meadows in the lower Dalalven floodplains, Sweden
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- Östman, Örjan (author)
- Uppsala universitet,Zooekologi,Uppsala University
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- Wengström, Åsa (author)
- Uppsala universitet,Zooekologi
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- Grandin, Ulf (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment
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- Wissman, Jörgen (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Centrum för biologisk mångfald,Swedish Biodiversity Centre
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Schafer, Martina (author)
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- Lundström, Jan O. (author)
- Uppsala universitet,Zooekologi
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(creator_code:org_t)
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- 2014-08-27
- 2015
- English.
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In: Wetlands Ecology and Management. - : Springer Science and Business Media LLC. - 0923-4861 .- 1572-9834. ; 23:2, s. 257-267
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://res.slu.se/i...
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Abstract
Subject headings
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- To investigate the effect of vegetation management on mosquito abundance on the floodplains of the River Dalalven, central Sweden, we studied abundance of floodwater mosquito larvae (mainly Aedes sticticus) using a paired design, comparing flooded wet meadows that were mowed or grazed by cattle to those that were unmanaged. Two floods occurred during the study year (2012), the first in conjunction with the spring flood in May and the second after heavy rainfall in July. We used the standard mosquito dipper to estimate mosquito larval abundance along transects from the shore towards permanent water on each meadow. The number of mosquito larvae was on average lower in each managed wet meadow compared to the corresponding unmanaged meadow, both in May (71 % reduction, SD = 28 %) and in July (35 % reduction, SD = 79 %). However, there was substantial variation in the difference between managed and unmanaged meadows among pairs. We measured water depth, temperature, estimated proportion of open water surface, soil nutrient levels and micro-topology. Some of the variation in larval abundance could be explained by differences in local conditions. Mosquito larval abundance increased with nutrient levels and occurrence of tussocks, and decreased with water depth and percentage open water surface, especially among unmanaged wetlands. This study suggests that mowing or grazing may reduce the abundance of floodwater mosquito larvae in flooded wet meadows. In addition, vegetation management seem to have the greatest effect on mosquito larval abundance in nutrient-rich wet meadows where tussocks are abundant.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- Grassland management
- Control
- Floods
- Floodplain
- Mosquito
- Nuisance
Publication and Content Type
- ref (subject category)
- art (subject category)
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