Environmental effects on organisms
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Environmental effects on organisms. Ch 6.2 and 6.3. Distribution - where a particular species is found Abundance - number of the species in that locality Altitudinal zonation - zones of climate, vegetation, and crops that change with height above sea level.

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Environmental effects on organisms

  • Distribution - where a particular species is found

  • Abundance - number of the species in that locality

  • Altitudinal zonation - zones of climate, vegetation, and crops that change with height above sea level.

  • Latitudinal zonation - predictable changes in community composition as one moves away from the equator


Environmental effects on organisms

  • Ecological Succession - The gradual and orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established

  • Primary Succession - The series of changes that occur in an area where no ecosystem previously existed

  • Pioneer Species - The first species to live in an area of primary succession

  • Micro-environments - climate within a small area that differs significantly from the climate of the surrounding area eg a cave


Environmental effects on organisms

  • Dominant species - A species with substantially higher abundance or biomass than other species in a community. Dominant species exert a powerful control over the occurrence and distribution of other species.

  • Climax Community - A stable, mature community that undergoes little or no change in species over time.

  • Secondary Succession - The series of changes that occur after a disturbance of an existing ecosystem


Environmental effects on organisms

  • Invasive Species - Species that enter new ecosystems and multiply, harming native species and their habitats

  • Disclimax community - results from degradation of a community due to activities of organisms the eventually leads to desertification

  • Desertification - Degradation of land, especially in semiarid areas, primarily because of human actions like excessive crop planting, animal grazing, and tree cutting.


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