Table 3.5 The number of organisms, biomass and energy in each trophic level of Silver Springs, Florida Trophic level Number of organisms Energy (kJ m-² year-!) Biomass (g m¯2) Tertiary consumers T4 0.01 1.5 67 24 x 10 Secondary consumers T3 11.0 1602 41 x 104 14 x 103 Primary consumers T, 37.0

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Terrestrial Ecosystem

An ecosystem is a collection of interconnected communities. It includes both living and non-living elements of specific strata. The terrestrial ecosystem is solely related to the ecosystem present on the land and covers 25 to 30% of the total earth’s surface area.