Tag: biotic
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Soil as Ecological Factor
Introduction Soil consists of weathered layer of Earth’s crust with products of decay of living organisms intermingled. In soil, thus, abiotic & biotic components are intimate. Soil is considered to be chief organizing centre for land ecosystems. Pedosphere: Outermost layer of earth that is composed of soil & subject to its formation. Pedogenesis: Process of…
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Ecosystem Structure
On the basis of trophic structure, ecosystem is two layered: “trophe = nourishment” Autotrophic Stratum (Green Belt): Upper, self-nourishing layer of chlorophyll-containing plants. Fix the light energy, convert inorganic substances into complex organic compounds which predominate in the stratum. The most intensive autotrophic metabolism occurs in this layer where light energy is available. Heterotrophic Stratum…