A population of great tit enjoy limited competition for nest…
A population of great tit enjoy limited competition for nesting sites in Wytham Woods (near Oxford, UK). However, a population of door mice expand their range into the western portion of this forest. They too nest in small cavities, and they are more formidable competitors. As a result, they functionally exclude the great tits from using the western portion of the forest entirely. This situation describes a reduction of the great tits’ (choose one: realized or fundamental) niche.
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