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Changes in numbers and distribution of breeding waterfowl in the Swedish mountain chain between 1972–1975 and 2009

Förändringar i antal och utbredning av häckande sjöfåglar i svenska fjällkedjan mellan 1972–1975 och 2009
Author:
  • Leif Nilsson
  • Johan Nilsson
Publishing year: 2012
Language: English
Pages: 107-126
Publication/Series: Ornis Svecica
Volume: 22
Issue: 3-4
Document type: Journal article
Publisher: Sveriges Ornitologiska Förening

Abstract english

During 1972–1975, the breeding waterfowl populations of the northern parts of Fennoscandia (south to 65° N in Sweden) were surveyed for the first time. In 2009, a new survey was undertaken in the Swedish part of the mountain chain. Censuses were performed from the air in transects of 5×5 km squares and in special areas. The distribution of the different species was largely similar between the two periods but there were a number of differences on the regional level. Most species had more or less the same population sizes but there were some variation in the different parts of the mountains. Three species showed clear increases between the periods. Cygnus cygnus had the same increase in the mountain chain as in the rest of the country. Melanitta nigra was about four times as common in 2009 compared to the 1970s and Mergus merganser also had higher counts in 2009. Melanitta fusca decreased

Keywords

  • Biological Sciences
  • Ecology

Other

Published
  • ISSN: 1102-6812
Leif Nilsson
E-mail: leif.nilsson [at] biol.lu.se

Professor emeritus

Biodiversity

+46 46 222 37 09

+46 70 525 57 09

E-C253

Sölvegatan 37, Lund

50

Centre for Animal Movement Research
Evolutionary Ecology, Department of Biology
Ecology building S-223 62 Lund Sweden