BSC 385 Lecture Notes - Lecture 28: Fractal Dimension, Normalized Difference Vegetation Index, Covariance
27 Apr 2017
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Document Summary
Abiotic causes of landscape patterns: the primary causes of landscape patterns are climate and landform, landform is a geological term referring to surface shape, elevation and slope. Landscape patterns: biotic factors contribute to landscape patterns/ mosaic, ecosystem engineers, ex. Beavers, alligators: keystone species, predators, competitors, mutualists, parasites. Recovery of the black-footed ferret: the black-footed ferret is a specialized predator of prairie dogs, susceptible to sylvatic plague, thought to be extinct until a colony was discovered near meeteetse, Wyoming in 1981: 1981 a captive breeding program using 18 surviving individuals, 1991 reintroduction into the wild began, 300+ animals now in wild. What was killing the prairie chickens: habitat destruction, directly reduced the size of the population. Computer algorithms can identify landscape patches: patch surface area that differs ecologically from its surroundings, characteristics measured in cells, patch is a contiguous group of cells with the same characteristics. Properties of the landscape patches: proximity (px) the relative isolation of patches.
