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title The Effects of Habitat Type and Volcanic Eruptions on the Breeding Demography of Icelandic Whimbrels Numenius phaeopus
authors Katrinardottir, B; Alves, JA; Sigurjonsdottir, H; Hersteinsson, P; Gunnarsson, TG
author full name Katrinardottir, Borgny; Alves, Jose A.; Sigurjonsdottir, Hrefna; Hersteinsson, Pall; Gunnarsson, Tomas G.
title The Effects of Habitat Type and Volcanic Eruptions on the Breeding Demography of Icelandic Whimbrels Numenius phaeopus
nationality internacional
source PLOS ONE
language English
document type Article
abstract Distinct preference of species for habitats is most often driven by long term differences in demographic rates between habitats. Estimating variation in those rates is key for developing successful conservation strategies. Stochastic events can interact with underlying variation in habitat quality in regulating demography but the opportunities to explore such interactions are rare. Whimbrels in Iceland show a strong preference for sparsely vegetated riverplains. Such habitats in Iceland face various threats, e.g., climate change, river regulation and spread of alien plant species. In this study we compared demographic parameters of breeding Whimbrels between riverplains and other habitats before, during and after volcanic eruption events to estimate the importance of the habitats for the species and the effect of ash deposit on breeding success. We found that an estimated minimum of 23% of the Icelandic population of Whimbrels and c. 10% of the world population of the species breed in riverplain habitats in Iceland. Whimbrels bred consistently at much higher densities in riverplain habitats than in other habitats and riverplains also had higher densities of pairs with fledglings although the proportion of successful breeders was similar between habitats. Predation by livestock may have had a considerable negative effect on breeding success on our study sites. Breeding was negatively affected by the volcanic activity, probably through the effects of ash on the invertebrate food supply, with breeding success being gradually worse closer to the eruption. Breeding success was equally affected by volcanism across habitats which differed in underlying habitat quality. This study gives an example of how populations can be regulated by factors which operate at different spatial scales, such as local variation in habitat quality and stochastic events which impact larger areas.
author address [Katrinardottir, Borgny] Iceland Inst Nat Hist, Dept Ecol, Gardabaer, Iceland; [Katrinardottir, Borgny; Alves, Jose A.; Gunnarsson, Tomas G.] Univ Iceland, South Iceland Res Ctr, Selfoss Gunnarsholt, Iceland; [Alves, Jose A.] Univ Aveiro, CESAM, P-3800 Aveiro, Portugal; [Sigurjonsdottir, Hrefna; Hersteinsson, Pall] Univ Iceland, Dept Life & Environm Sci, Reykjavik, Iceland
reprint address Katrinardottir, B (reprint author), Iceland Inst Nat Hist, Dept Ecol, Gardabaer, Iceland.
e-mail address borgny@ni.is
funding agency and grant number University of Iceland Research Fund; Icelandic Research Fund for Graduate Students; Palmi Jonsson's Conservation Fund (Natturuverndarsjodur Palma Jonssonar)
funding text The work was supported by the following: 2010 - University of Iceland Research Fund, http://www.sjodir.hi.is/english, TGG - 900.000 ISK; 2010 - Icelandic Research Fund for Graduate Students (has now been joined with another fund), http://www.rannis.is/, BK 840.000 ISK; and 2009 - Palmi Jonsson's Conservation Fund (Natturuverndarsjodur Palma Jonssonar), http://www.natturuverndarsjodur.is/, BK - 850.000 ISK. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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cited reference count 77
publisher city SAN FRANCISCO
publisher address 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
issn 1932-6203
29-character source abbreviation PLOS ONE
iso source abbreviation PLoS One
publication date JUL 10
year published 2015
volume 10
issue 7
article number e0131395
digital object identifier (doi) 10.1371/journal.pone.0131395
page count 15
web of science category Multidisciplinary Sciences
subject category Science & Technology - Other Topics
document delivery number CN1FD
unique article identifier WOS:000358162300037
link http://dx.doi.org/10.1371/journal.pone.0131395
CESAM authors