Recreation-induced changes in boreal bird communities in protected areas.
Kangas
K
K
Oulanka Research Station and Department of Biology, University of Oulu, P.O. Box 3000, Oulu FI-90014, Finland. katja.kangas@oulu.fi
Luoto
M
M
Ihantola
A
A
Tomppo
E
E
Siikamäki
P
P