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Long-term data reveal contrasting impacts of native versus invasive nest predators in Iceland

Jónsson, J.E.; Rickowski, F.S.; Ruland, F.; Ásgeirsson, A.; Jeschke, J.M. – 2023

Bird species on islands are strongly impacted by biological invasions, with the Icelandic common eider (Somateria mollissima borealis) being particularly threatened. Down collection by local families in Breiðafjörður, West Iceland, provided long-term datasets of nests from two archipelagos, covering 95 islands over 123 years and 39 islands over 27 years, respectively. Using these exceptional datasets, we found that the arrival of the invasive semi-aquatic American mink (Neogale vison) was a more impactful driver of population dynamics than climate. This invasive predator heavily reduced eider nest numbers by ca. 60% in the Brokey archipelago. In contrast, we detected an apparently adaptive response to the return of the native fox in the Purkey archipelago, with dense nests on islands inaccessible to the fox and no apparent impact on eider populations. This difference might be due to the eiders lacking a joint evolutionary history with the mink and therefore lacking appropriate antipredator responses.

Titel
Long-term data reveal contrasting impacts of native versus invasive nest predators in Iceland
Verfasser
Jónsson, J.E.; Rickowski, F.S.; Ruland, F.; Ásgeirsson, A.; Jeschke, J.M.
Verlag
Wiley
Datum
2023-10-11
Kennung
http://doi.org/10.1111/ele.14313
Erschienen in
Ecology Letters 26, 2066-2076
Zitierweise
Jónsson, J.E.; Rickowski, F.S.; Ruland, F.; Ásgeirsson, A.; Jeschke, J.M. 2023. Long-term data reveal contrasting impacts of native versus invasive nest predators in Iceland. Ecology Letters 26, 2066-2076. http://doi.org/10.1111/ele.14313
Sprache
eng
Art
Text