title: Climate change risks and conservation implications for a threatened small-range mammal species.
abstract: BACKGROUND
  Climate change is already affecting the distributions of many species and may lead to numerous extinctions over the next century. Small-range species are likely to be a special concern, but the extent to which they are sensitive to climate is currently unclear. Species distribution modeling, if carefully implemented, can be used to assess climate sensitivity and potential climate change impacts, even for rare and cryptic species.
  
  
  RESULTS
  We used species distribution modeling to assess the climate sensitivity, climate change risks and conservation implications for a threatened small-range mammal species, the Iberian desman (Galemys pyrenaicus), which is a phylogenetically isolated insectivore endemic to south-western Europe. Atlas data on the distribution of G. pyrenaicus was linked to data on climate, topography and human impact using two species distribution modeling algorithms to test hypotheses on the factors that determine the range for this species. Predictive models were developed and projected onto climate scenarios for 2070-2099 to assess climate change risks and conservation possibilities. Mean summer temperature and water balance appeared to be the main factors influencing the distribution of G. pyrenaicus. Climate change was predicted to result in significant reductions of the species' range. However, the severity of these reductions was highly dependent on which predictor was the most important limiting factor. Notably, if mean summer temperature is the main range determinant, G. pyrenaicus is at risk of near total extinction in Spain under the most severe climate change scenario. The range projections for Europe indicate that assisted migration may be a possible long-term conservation strategy for G. pyrenaicus in the face of global warming.
  
  
  CONCLUSIONS
  Climate change clearly poses a severe threat to this illustrative endemic species. Our findings confirm that endemic species can be highly vulnerable to a warming climate and highlight the fact that assisted migration has potential as a conservation strategy for species threatened by climate change.
authors.affiliation: Ecoinformatics and Biodiversity Group, Department of Biological Sciences, Aarhus University, Aarhus, Denmark. morueta.holme@biology.au.dk
authors.forename: Naia
authors.initials: N
authors.lastname: Morueta-Holme
authors.forename: Camilla
authors.initials: C
authors.lastname: Fløjgaard
authors.forename: Jens-Christian
authors.initials: JC
authors.lastname: Svenning
mesh_terms: D000465:Algorithms; D025041:Animal Migration; D000818:Animals; D057231:Climate Change; D003247:Conservation of Natural Resources / Q000379:methods*; D056727:Endangered Species; D005060:Europe; D053476:Extinction, Biological; D017752:Greenhouse Effect; D008322:Mammals; D011156:Population Density; D012306:Risk
references.citation: Science. 2000 Mar 10;287(5459):1770-4
references.pmid: 10710299
references.citation: Gene. 2006 Jun 21;375:1-13
references.pmid: 16624502
references.citation: Nature. 2008 May 15;453(7193):353-7
references.pmid: 18480817
references.citation: Proc Biol Sci. 2003 Sep 22;270(1527):1887-92
references.pmid: 14561301
references.citation: Trends Ecol Evol. 2009 Sep;24(9):473-4; author reply 476-7
references.pmid: 19595474
references.citation: Conserv Biol. 2009 Aug;23(4):788-9
references.pmid: 19627304
references.citation: Biol Lett. 2008 Oct 23;4(5):568-72
references.pmid: 18664421
references.citation: Proc Natl Acad Sci U S A. 2009 Jun 16;106(24):9721-4
references.pmid: 19509337
references.citation: Ecol Lett. 2005 Sep;8(9):993-1009
references.pmid: 34517687
references.citation: Nature. 2004 Jan 8;427(6970):145-8
references.pmid: 14712274
references.citation: Science. 2008 Jul 18;321(5887):345-6
references.pmid: 18635780
references.citation: Trends Ecol Evol. 2009 May;24(5):248-53
references.pmid: 19324453
references.citation: Science. 2008 Oct 10;322(5899):261-4
references.pmid: 18845755
references.citation: Oecologia. 2009 Feb;159(1):237-47
references.pmid: 18987895
references.citation: Dokl Biol Sci. 2007 May-Jun;414:219-20
references.pmid: 17668626
references.citation: Science. 2002 Aug 30;297(5586):1548-51
references.pmid: 12202829
references.citation: PLoS Biol. 2008 Apr 1;6(4):e79
references.pmid: 18384234
references.citation: Ecol Lett. 2008 Apr;11(4):357-69
references.pmid: 18279357
references.citation: Conserv Biol. 2007 Apr;21(2):297-302
references.pmid: 17391179
references.citation: Proc Biol Sci. 2008 Feb 22;275(1633):419-25
references.pmid: 18048286
references.citation: Proc Natl Acad Sci U S A. 2005 Jun 7;102(23):8245-50
references.pmid: 15919825
references.citation: Trends Ecol Evol. 2007 Jan;22(1):42-7
references.pmid: 17011070
references.citation: Nature. 2002 Mar 28;416(6879):389-95
references.pmid: 11919621
references.citation: Nature. 2003 Jan 2;421(6918):57-60
references.pmid: 12511952
references.citation: Proc Biol Sci. 2003 Mar 22;270(1515):583-90
references.pmid: 12769457