Context-dependent colonization of terrestrial habitat 'islands' by a long-distance migrant bird

Proceedings. Biological Sciences
Robin C WhytockKirsty J Park

Abstract

Landscape context can affect how individuals perceive patch quality during colonization. However, although context-dependent colonization has been observed in aquatic environments, it has rarely been studied in terrestrial environments or at large spatial scales. In this paper, we assessed how landscape context influenced colonization rates in a large-scale (ca 7000 km2) terrestrial system where colonizers (Willow Warbler Phylloscopus trochilus) are capable of rapid, long-distance movements. Bioacoustic recorders were used to detect first song dates (an indicator of colonization or re-colonization) and settlement in 23 naturally replicated habitat patches. We compared support for three competing hypotheses describing colonization patterns that depend on landscape context ('redirection', 'landscape-selection' and 'relative patch size') with two patch-level hypotheses (patch 'quality' and 'heterospecific attraction'). First song was earlier when habitat availability in the landscape was low, supporting the 'redirection' hypothesis. Settlement probability was best predicted by patch 'quality' and was lower in woodlands with a dense understorey. Results suggest that colonization of habitat patches by male P. trochilus after spring ...Continue Reading

References

May 20, 2009·Ecology·William J Resetarits, Christopher A Binckley
Jun 13, 2013·Trends in Ecology & Evolution·Bruce A RobertsonAndrew Sih
May 1, 2015·Conservation Biology : the Journal of the Society for Conservation Biology·Alessio Mortelliti, David B Lindenmayer
Nov 26, 2015·Science Advances·Nick M HaddadJohn R Townshend
Jan 25, 2017·The Journal of Animal Ecology·Jelmer M Samplonius, Christiaan Both
Jul 8, 2017·Conservation Biology : the Journal of the Society for Conservation Biology·Robin C WhytockKirsty J Park

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