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The distribution of organisms in the biosphere is characterized by lack of uniformity; however, there is no organism that is distributed haphazardly on the earth’s surface. A close examination shows that the patterns of distribution are never even. Indeed each species exhibits variations in distribution, both in time and space. Spatial variation in abundance reflects the extent to which the local environment meets the niche requirements of a species. Each species tends to be most abundant where all niche parameters are in favourable range and to be rare or absent where one or more environmental factors are strongly limiting. Living organisms are not haphazardly distributed on the face of the earth; we can therefore identify different patterns of distribution. Generally, at any one place there exist patterns of distribution, which vary in space, called spatial patterns, and those which vary with time called temporal patterns. The spatial patterns, which occur in different aspects of measurements and identification, are a function of species richness or diversity, and continuity or discontinuity. The spatial patterns also are a function of species occurrence.
francis1897 answered the question on October 11, 2022 at 05:32
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