Climate change causes rapid changes in the distribution and site abundance of birds in winter

Detecting coherent signals of climate change is best achieved by conducting expansive, long-term studies. Here, using counts of waders (Charadrii) collected from ca. 3500 sites over 30 years and covering a major portion of western Europe, we present the largest-scale study to show that faunal abundance is influenced by climate in winter. We demonstrate that the 'weighted centroids' of populations of seven species of wader occurring in internationally important numbers have undergone substantial shifts of up to 115 km, generally in a northeasterly direction. To our knowledge, this shift is greater than that recorded in any other study, but closer to what would be expected as a result of the spatial distribution of ecological zones. We establish that year-to-year changes in site abundance have been positively correlated with concurrent changes in temperature, but that this relationship is most marked towards the colder extremities of the birds' range, suggesting that shifts have occurred as a result of range expansion and that responses to climate change are temperature dependent. Many attempts to model the future impacts of climate change on the distribution of organisms, assume uniform responses or shifts throughout a species' range or with temperature, but our results suggest that this may not be a valid approach. We propose that, with warming temperatures, hitherto unsuitable sites in northeastern Europe will host increasingly important wader numbers, but that this may not be matched by declines elsewhere within the study area. The need to establish that such changes are occurring is accentuated by the statutory importance of this taxon in the designation of protected areas.

[1]  C. J. Camphuysen,et al.  Oystercatcher winter mortality in The Netherlands: the effect of severe weather and food supply , 1996 .

[2]  S. Levin.  THE PROBLEM OF PATTERN AND SCALE IN ECOLOGY , 1992 .

[3]  S. Fretwell,et al.  On territorial behavior and other factors influencing habitat distribution in birds , 1969 .

[4]  Nils Warnock.  Shorebirds. An Illustrated Behavioural Ecology , 2005 .

[5]  T. Dawson,et al.  Modelling potential impacts of climate change on the bioclimatic envelope of species in Britain and Ireland , 2002 .

[6]  S. Schneider,et al.  Fingerprints of global warming on wild animals and plants , 2003, Nature.

[7]  H. Skov,et al.  Numbers and Distribution of Waterbirds in Denmark 1987-1989 , 1997 .

[8]  C. J. Smit,et al.  Trends van benthivore watervogels in de Nederlandse Waddenzee 1975-2002: grote verschillen tussen schelpdiereneters en wormeneters , 2005 .

[9]  J. Connell.  The Influence of Interspecific Competition and Other Factors on the Distribution of the Barnacle Chthamalus Stellatus , 1961 .

[10]  G. Yohe,et al.  A globally coherent fingerprint of climate change impacts across natural systems , 2003, Nature.

[11]  W. Thuiller.  BIOMOD – optimizing predictions of species distributions and projecting potential future shifts under global change , 2003 .

[12]  S. Levin.  The problem of pattern and scale in ecology , 1992 .

[13]  B. Peterjohn,et al.  Birds in Europe: Population Estimates, Trends and Conservation Status , 2006 .

[14]  Andy J. Musgrove,et al.  Numbers of wintering waterbirds in Great Britain and the Isle of Man (1994/1995–1998/1999): II. Coastal waders (Charadrii) , 2003 .

[15]  C. Both,et al.  Adjustment to climate change is constrained by arrival date in a long-distance migrant bird , 2001, Nature.

[16]  C. Perrins.  Tits and their caterpillar food supply , 2008 .

[17]  W. Thuiller.  Biodiversity: Climate change and the ecologist , 2007, Nature.

[18]  L. Underhill,et al.  Index Numbers for Waterbird Populations. I. Review and Methodology , 1994 .

[19]  C. Berrevoets,et al.  Watervogels in de Zoute Delta 2001/2002 , 2002 .

[20]  Joseph H. Connell,et al.  On the Prevalence and Relative Importance of Interspecific Competition: Evidence from Field Experiments , 1983, The American Naturalist.

[21]  G. Austin,et al.  Population estimates of waders on the non-estuarine coasts of the UK and the Isle of Man during the winter of 1997–98 , 2003 .

[22]  C. Stern.  CONCLUDING REMARKS OF THE CHAIRMAN , 1950 .

[23]  P. Walker.  Modelling wildlife distributions using a geographic information system: kangaroos in relation to climate , 1990 .

[24]  C. Thomas,et al.  Birds extend their ranges northwards , 1999, Nature.

[25]  G. Austin,et al.  Shifting nonbreeding distributions of migratory fauna in relation to climatic change , 2005 .

[26]  I. Nisbet.  Waterbird Population Estimates—Fourth Edition , 2008 .

[27]  N. Burton,et al.  Impacts of sudden winter habitat loss on the body condition and survival of redshank Tringa totanus , 2006 .

[28]  William J. Sutherland,et al.  The buffer effect and large-scale population regulation in migratory birds , 2001, Nature.

[29]  D. Mehlman,et al.  The UK SPA network: Its Scope and Content , 2003 .

[30]  B. Manly.  Randomization, Bootstrap and Monte Carlo Methods in Biology , 2018 .

[31]  R. Briers,et al.  Ecology: From Individuals to Ecosystems , 2006 .

[32]  P. Atkinson,et al.  Changes in commercially fished shellfish stocks and shorebird populations in the Wash, England , 2003 .

[33]  D. J. Townshend.  Decisions for a lifetime: establishment of spatial defence and movement patterns by juvenile grey plovers (Pluvialis squatarola) , 1985 .

[34]  P. Harrison,et al.  Modelling climate change impacts on species’ distributions at the European scale: implications for conservation policy , 2006 .

[35]  Jerram L. Brown.  The Buffer Effect and Productivity in Tit Populations , 1969, The American Naturalist.

[36]  O. Phillips,et al.  Extinction risk from climate change , 2004, Nature.

[37]  S. Hurlbert.  Pseudoreplication and the Design of Ecological Field Experiments , 1984 .

[38]  D. Roy,et al.  Butterfly numbers and weather: predicting historical trends in abundance and the future effects of climate change , 2001 .

[39]  O. Hoegh‐Guldberg,et al.  Ecological responses to recent climate change , 2002, Nature.

[40]  B. Etheridge,et al.  Survival rates of Redshank Tringa totanus wintering on the Moray Firth , 1997 .

[41]  C. J. Camphuysen,et al.  Oystercatcher Haematopus ostralegus winter mortality in The Netherlands: The effect of severe weather and food supply , 1996 .

[42]  Niall H. K. Burton,et al.  The possible impact of climate change on the future distributions and numbers of waders on Britain's non‐estuarine coast , 2004 .