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The role of ecological and environmental conditions on the nesting success of waders in sub-Arctic Sweden
Stockholm University, Faculty of Science, Department of Zoology.
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Number of Authors: 62019 (English)In: Polar Biology, ISSN 0722-4060, E-ISSN 1432-2056, Vol. 42, no 8, p. 1571-1579Article in journal (Refereed) Published
Abstract [en]

Waders that breed in the sub-Arctic are one of the groups most threatened by climate change. At the same time, wader breeding success also can vary as a function of fluctuations in the numbers of predators and rodents (an alternative prey for the predators). How climate change could influence these foodweb interactions remains poorly studied. In this study, we analysed the effects of ecological (e.g. vole/lemming and predator abundance) and environmental factors (e.g. snow cover) on the breeding success of waders in sub-Arctic Lapland. We monitored more than 500 wader nests during six breeding seasons, which spanned a full rodent cycle and one year of exceptionally late snow melt. Nest predation rate, and thus wader breeding success, did not vary as a function of predator or rodent abundance. However, predation rate was exceptionally high in the year with a late snow melt. More variability in climate is expected for the future, where more precipitation and cold spring temperatures resulting in late snow melt will be more frequent, influencing the rodent and predator numbers, and therefore wader breeding success in the sub-Arctic. Snow would limit the number of open areas for nesting and hence predators would then be able to find these nests more easily. Additionally, predators might concentrate their efforts on alternative prey if snow has reduced their capacity to find other food sources. And, ultimately, changes in the rodent fluctuations could affect the final outcome of predators.

Place, publisher, year, edition, pages
2019. Vol. 42, no 8, p. 1571-1579
Keywords [en]
Snow, Predation, Survival, Breeding, Year differences
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-173192DOI: 10.1007/s00300-019-02544-xISI: 000482050500014OAI: oai:DiVA.org:su-173192DiVA, id: diva2:1351890
Available from: 2019-09-17 Created: 2019-09-17 Last updated: 2019-09-17Bibliographically approved

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CiteExportLink to record
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