Environmental Science
112 ENVIRONMENTAL SCIENCE (i) Addition Recruitment into the population is a function of birth rate and immigration rate. (ii) Re ...
ENVIRONMENTAL SCIENCE : ECOSYSTEM 113 among themselves besides with their environment. Biocoenosis and bioecocoenois are roughly ...
114 ENVIRONMENTAL SCIENCE STRUCTURE OF ECO-SYSTEMS Meaning of Structure By structure of an eco-system we mean as under. (i) The ...
ENVIRONMENTAL SCIENCE : ECOSYSTEM 115 (iii) Members of the autotrophic component are known as eco-system producers because they ...
116 ENVIRONMENTAL SCIENCE Decomposers In the absence of decomposers, no ecosystem could function long. In their absence, dead or ...
ENVIRONMENTAL SCIENCE : ECOSYSTEM 117 Saprotrophs The ecosystem is completed by saprotrophs or decomposer organisms such as bact ...
118 ENVIRONMENTAL SCIENCE (ii) The herbivores, which are smaller fish; rotifers etc are less in number than the producers; (iii) ...
ENVIRONMENTAL SCIENCE : ECOSYSTEM 119 practically very much difficult. The producers, green plants, fix radiant energy and with ...
120 ENVIRONMENTAL SCIENCE The Growth and Development of Plants In the biogeochemical cycles are included the uptake of nutrien ...
ENVIRONMENTAL SCIENCE : ECOSYSTEM 121 DECOMPOSERS In this world all living organisms require a constant supply of nutrients for ...
122 ENVIRONMENTAL SCIENCE Most of these micro-arthropods are predominantly fungal-feeders. They can do as under: (1) They can de ...
ENVIRONMENTAL SCIENCE : ECOSYSTEM 123 DECOMPOSERS WITH VARYING RELATIONS Some decomposer organism’s cannot be assigned a rigid o ...
124 ENVIRONMENTAL SCIENCE ENERGY-ITS FLOW IN ECOSYSTEM Energy-Defined Energy can be defined as the capacity to do work, whether ...
ENVIRONMENTAL SCIENCE : ECOSYSTEM 125 for ecosystem. The solar radiation, which originates from sun is the source of energy for ...
126 ENVIRONMENTAL SCIENCE (2) Again 21 per cent of this energy, or 23 gcal/cm^2 /yr (show on the bottom as respiration) is consu ...
ENVIRONMENTAL SCIENCE : ECOSYSTEM 127 Trophic levels Green plants producers Consumers 2 Herbivores NU NA 3 Carnivores Tota l lig ...
128 ENVIRONMENTAL SCIENCE It is very simplified energy flow model of three trophic levels Apparently the energy flows is greatly ...
ENVIRONMENTAL SCIENCE : ECOSYSTEM 129 On the basis of the studies E.P. Odum pointed out that in nature there are present two bas ...
130 ENVIRONMENTAL SCIENCE The three major steps in energy flow correspond to:— (a) Exploitation efficiency, (b) Assimilation eff ...
ENVIRONMENTAL SCIENCE : ECOSYSTEM 131 spans and that account for much larger changes in community composition and structure. The ...
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