The Barnacle Goose (Branta leucopsis) in the archipelago of southern Finland - population growth and nesting dispersal

Show full item record



Permalink

http://hdl.handle.net/10138/230267

Citation

Yrjölä , R A , Holopainen , S , Pakarinen , R , Tuoriniemi , S , Luostarinen , M , Mikkola-Roos , M , Nummi , P & Väänänen , V-M 2017 , ' The Barnacle Goose ( Branta leucopsis ) in the archipelago of southern Finland - population growth and nesting dispersal ' , Ornis Fennica , vol. 94 , no. 4 , pp. 161-171 .

Title: The Barnacle Goose (Branta leucopsis) in the archipelago of southern Finland - population growth and nesting dispersal
Author: Yrjölä, Rauno A.; Holopainen, Sari; Pakarinen, Raimo; Tuoriniemi, Sini; Luostarinen, Matti; Mikkola-Roos, Markku; Nummi, Petri; Väänänen, Veli-Matti
Contributor: University of Helsinki, Department of Forest Sciences
University of Helsinki, Department of Forest Sciences
University of Helsinki, Department of Forest Sciences
Date: 2017
Language: eng
Number of pages: 11
Belongs to series: Ornis Fennica
ISSN: 0030-5685
URI: http://hdl.handle.net/10138/230267
Abstract: We studied the population growth and expansion of Barnacle Goose (Branta leucopsis) in Helsinki archipelago, southern Finland. Barnacle Goose breeding was first recorded in Helsinki in 1989. During our study 1996-2013 the number of nesting geese increased from 24 to 740 pairs. We analyzed the role of protected islands in the population growth, and the factors behind differences in growth rates. Our study data consisted of 104 islands. Of these, 29 are protected from private recreational activity (nature reserve ormilitary areas) and were established prior to the start of our study. We predicted that protected areas would have a positive impact on Barnacle Goose population growth. In part of the study period (2002-2013) the population growth in our study area was much steeper in protected islands compared to islands with open access. However, breeding densities in those unprotected islands were higher than in protected islands in the early years of the study. We found that the most important factors affecting pair numbers in islands are island size and the time it has been inhabited, in addition to island distance from the islands southeast of Helsinki, where breeding expansion started. Island protection had no effect on the breeding geese numbers or current densities on the islands. Results indicate that early breeders like Barnacle Geese do not benefit from island protection probably because the recreational use of the islands is scant early in the spring.
Subject: HUNTING DISTURBANCE
LONG-TERM
DENSITY
GEESE
CONSEQUENCES
WATERBIRDS
ISLANDS
SUCCESS
1181 Ecology, evolutionary biology
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
174Yrjola.pdf 678.1Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record