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T1  - North by north-west : climate change and directions of density shifts in birds 
SN  -  /  
UR  - http://hdl.handle.net/10138/308648 
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A1  - Lehikoinen, Aleksi; Virkkala, Raimo 
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Y1  - 2016 
LA  - eng 
AB  - There is increasing evidence that climate change shifts species distributions towards poles and mountain tops. However, most studies are based on presence-absence data, and either abundance or the observation effort has rarely been measured. In addition, hardly any studies have investigated the direction of shifts and factors affecting them. Here, we show using count data on a 1000km south-north gradient in Finland, that between 1970-1989 and 2000-2012, 128 bird species shifted their densities, ... 
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KW  - distribution changes; ecological traits; global warming; habitat selection; monitoring censuses; species distribution models; RANGE SHIFTS; POLEWARD SHIFTS; PROTECTED AREAS; POPULATION TRENDS; BOREAL BIRDS; LAND-USE; DISTRIBUTIONS; BUTTERFLIES; BOUNDARIES; PHENOLOGY; 1181 Ecology, evolutionary biology 
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