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Coastal niches for terrestrial predators: a stable isotope study.
Stockholm University, Faculty of Science, Department of Botany. (Peter Hambäck)
Stockholm University, Faculty of Science, Department of Botany.
2010 (English)In: Canadian Journal of Zoology, ISSN 0008-4301, E-ISSN 1480-3283, Vol. 88, 1077-1085 p.Article in journal (Refereed) Published
Abstract [en]

The purpose of this study was to identify the use of marine versus terrestrial food items by terrestrial arthropod predators on Baltic Sea shores. The inflow of marine nutrients in the area consists mainly of marine algal detritus and emerging aquatic insects (e.g., chironomids). Diets of coastal arthropods were examined using carbon and nitrogen stable isotope analysis in a two source mixing model. The results suggest that spiders are the terrestrial predators mainly utilizing nutrients and energy of marine origin on Baltic Sea shores, whereas insect predators such as beetles and heteropterans mainly utilize nutrients and energy derived from terrestrial sources, possibly owing to differences in hunting behaviour. That spiders are the predators which 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.

Place, publisher, year, edition, pages
Ottawa: National Research Council of Canada , 2010. Vol. 88, 1077-1085 p.
National Category
Ecology
Identifiers
URN: urn:nbn:se:su:diva-51000DOI: 10.1139/Z10-074OAI: oai:DiVA.org:su-51000DiVA: diva2:383599
Funder
Formas, 2007-0458
Available from: 2011-01-05 Created: 2011-01-05 Last updated: 2017-12-11Bibliographically approved

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