La Tour du Valat

Article

The ability of forest reserves to maintain original fauna - why has the Chiffchaff (Phylloscopus collybita abietinus) disappeared from eastern central Finland?

Petri Lampila, Auteur ; Mikko Monkkonen, Auteur ; Ari Rajasarkka, Auteur

Dans Ornis Fennica (86(2) 2009)

We studied the occurrence of Chiffchaff Phylloscopus collybita at the Finnish and Russian border at ca. 65 degrees N. This species shows an interesting distribution in the region, being virtually absent from the Finnish side (Kainuu) but being a[...]

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Article

The Red-flanked Bluetail in Europe: range expansion and population trends

Heimo Mikkola, Auteur ; Ari Rajasarkka, Auteur

Dans British Birds (107(9) SEP 2014)

Data are presented to illustrate the population increase and expansion in the breeding range of the Red-flanked Bluetail in Finland during the past 40 years. The changing status of this species in the rest of Europe over the same time period is [...]

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Article

Uneven regional distribution of protected areas in Finland: Consequences for boreal forest bird populations

Raimo Virkkala, Auteur ; Ari Rajasarkka, Auteur

Dans Biological Conservation (134(3) JAN 2007)

The significance of reserves in maintaining forest bird species of conservation concern (N=36) was studied by large-scale quantitative line transect bird censuses in Finland, which stretches 1100 km through the boreal zone from the hemiboreal to[...]

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