Abstract:Herring gulls (Larus argentatus) are used as ecological indicators of the coastal Lake Superior ecosystem in Pukaskwa National Park. Their populations have declined by 70% over the last 40 years, suggesting changes in the park ecosystem. Previous studies highlighted declining prey abundance as a possible contributing factor to population declines. Populations of avian predators that prey on herring gulls have simultaneously increased which could be a significant factor impacting gull population trends. Here, I… Show more
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