Environmental Science 1021F/G Chapter Notes - Chapter 9: Ecological Niche, Ecosystem Services, Windbreak

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Tropical regions (warm, lush, close to the equator) contains the greatest concentration and variety of plant and animal life forms on earth. Biodiversity: the variety of life on earth; it includes species, genetic and ecological diversity. Species diversity: the variety of species, including how many are present (richness) and their abundance relative to each other (evenness) Genetic diversity: the heritable variation among individuals of a single population or within the species as a whole. Ecological diversity: the variety within an ecosystem"s structure, including many communities, habitats, niches, and trophic levels. It is impossible to know the amount of species that exist on earth estimated between 3 to. Humans have yet to discover to identify about 86% of the species on earth. Ecosystem services: benefits that are important to all life, including humans, providing by functional ecosystems, includes such things as nutrient cycles, air and water purification, and ecosystem goods, such as good and fuel.

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