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The Spider and the ...
The Spider and the Sea : Effects of marine subsidies on the role of spiders in terrestrial food webs
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- Mellbrand, Kajsa, 1975- (author)
- Stockholms universitet,Botaniska institutionen
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- Hambäck, Peter, Lektor (thesis advisor)
- Stockholms universitet,Botaniska institutionen
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- Kautsky, Lena, Professor (thesis advisor)
- Stockholms universitet,Botaniska institutionen
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- Wise, David, Professor (opponent)
- University of Illinois in Chicago
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(creator_code:org_t)
- ISBN 9789171558770
- Stockholm : Department of Botany, Stockholm University, 2009
- English 44 s.
- Related links:
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https://su.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Subject headings
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- The purpose of this study was to identify if terrestrial arthropod predators on Baltic Sea shores vary in their use of marine versus terrestrial food items, and to construct a bottom-up food web for Baltic Sea shores. The inflow of marine nutrients in the area consists mainly of marine algal detritus and emerging aquatic insects (e.g. phantom midges, Chironomidae). Diets of coastal arthropods were examined using carbon and nitrogen stable isotope analysis, and a two source mixing model was used to examine proportions of marine carbon to diets. The results suggest that spiders are the terrestrial predators mainly utilizing nutrients and energy of marine origin on Baltic Sea shores, while insect predators such as beetles and hemipterans mainly utilize nutrients and energy derived from terrestrial sources, possibly due to differences in hunting behaviour. That spiders are the predators that benefit the most from the marine inflow suggest that eventual effects of marine subsidies for the coastal ecosystem as a whole are likely mediated by spiders.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- marine subsidies
- food webs
- stable isotopes
- shore ecosystems
- predators
- spiders
- Pardosa
- algae
- emerging insects
- Terrestrial, freshwater and marine ecology
- Terrestisk, limnisk och marin ekologi
- Plant Ecology
- växtekologi
Publication and Content Type
- vet (subject category)
- dok (subject category)
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