| http://www.w3.org/ns/prov#value | - Thus although our study provides support for the hypothesis that intense ungulate browsing negatively impacts willow ptarmigan, our study also suggests that causes of the current steep decline of ptarmigan populations in northern Fennoscandia should be sought in factors other than habitat fragmentation and changed rodent population dynamics Die derzeitigen Verkleinerungen der Verbreitungsgebiete u
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