Change search
ReferencesLink to record
Permanent link

Direct link
Dynamics and reproduction of a nest-box breeding population of Pied Flycatcher Ficedula hypoleuca in a subalpine birch forest in Swedish Lapland during a period of 46 years
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2011 (English)In: Ornis Svecica, ISSN 1102-6812, Vol. 21, 133-156 p.Article in journal (Other (popular science, discussion, etc.)) Published
Abstract [en]

A nest-box breeding population of Pied Flycatcher Ficedula hypoleuca in subalpine birch forest at Ammarnäs in northern Sweden was studied in 1965–2010. The population showed on average a significantly decreasing trend during the initial 25 years, after which it remained on a static level. The yearly variation of the population size was significantly correlated with breeding result in preceding years, which in turn was affected by e.g. nest predation, adverse climatic factors, clutch size, and incidence of defective egg shell formation. It is also suggested that the population decline during the initial 10–15 study years followed from over-establishment of the breeding habitat. The average breeding result was 2.3 fledglings per pair, which is far below the number needed for the population to be self-reproducing. The occurrence of unusually high rates of nest predation and defective egg shells seems to be passing phenomena, predicted to approach zero after about 30 and 60 years, respectively, after the start of the study. But even with these factors eliminated and with other conditions remaining unchanged, the Ammarnäs population will continue to be a sink population.

Place, publisher, year, edition, pages
Stockholm: Sveriges ornitologiska förening , 2011. Vol. 21, 133-156 p.
National Category
Biological Sciences
URN: urn:nbn:se:umu:diva-52235OAI: diva2:501474
Available from: 2012-02-14 Created: 2012-02-14 Last updated: 2012-03-13Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Nyholm, Erik
By organisation
Department of Ecology and Environmental Sciences
In the same journal
Ornis Svecica
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 111 hits
ReferencesLink to record
Permanent link

Direct link