Biology 12

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25.1 Ecosystem 25.1.1 Biosphere25.1.2 Autecology25.1.3 Synecology

25.2 Components of Ecosystem 25.2.1 Biotic Components25.2.2 Abiotic Components

25.3 Succession 25.3.1 Two Major forms of Succession25.3.2 Predation and its Significance25.3.3 Parasitism and its Significance25.3.4 Symbiosis25.3.5 Mutualism25.3.5 Commensalism25.3.6 Grazing

25.4 Biogeochemical Cycles 25.4.1 The Nitrogen Cycle25.4.2 Nitrogen Deplition and its Remedies25.4.3 The Flow of Energy in Food Chain of an Ecosystem