Biology 2483A Lecture Notes - Lecture 23: Old-Growth Forest, Passenger Pigeon, Landscape Ecology
14 Jan 2019
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Bio 2483 lecture 23- landscape ecology and ecosystem management. Loss and fragmentation of us old growth forest: decrease of passenger pigeon correlated to disappearance of oldgrowth forest continuous large patch of oldgrowth forest and then it becomes largely fragmented. Landscape: area in which at least 1 element is spatially heterogeneous; often includes multiple ecosystem: heterogeneity may involve different types of landscape elements, and how they are arranged, a mosaic is a composite of heterogeneous elements. Landscape ecologists look at the spatial arrangement of landscape elements: forest patches, soil types, lakes, etc. , across earth"s surface: these patterns influence what species live in an area and the dynamics of ecological processes. Fragmentation results in increasing degradation and edge effects. Fragmentation results in spatial isolation of populations, making them vulnerable to the problems of small populations: when habitat is fragmented, some species go extinct in many of the fragments.
