ECOSYSTEM
IMPORTANT TERMS:
· Gross Primary Productivity (GPP): The rate at which energy captured of organic matter synthesized by the producers per unit area per unit time.
· Hydrach: Succession occurring in water bodies.
· Macrophytes: Rooted plants found in shallow water.
· Net Primary Productivity (NPP): The rate at which energy of organic matter stored by producers in their bodies per unit area unit time.
· Nutrient Immobilization: Incorporation of soil nutrients in living microbes making them temporarily unavailable to other organisms.
· Phagotrophs: Heterotrophic organisms, mostly animals, which generally ingest and swallow their food.
· Photosynthetically Active Rediation (PAR): Refers to visible light or effective radiation for photosynthetic activity of the producers.
· Pioneer Organisms: The organisms which inhabit a bare substratum and lay the foundation for the succession of biotic community.
· PrimarySuccession: Ecological succession on a surface where original community has been destroyed.
· Production Ecology: Refers to the study of biomass production by the organisms.
· Productivity: The rate of biomass or organic matter production by the organisms.
· Sod Formers: The grasses which form a solid mat of grass cover.
· Secondary Productivity: The rate of increase in the biomass of heterotrophs per unit area per unit time.
· Standing Crop: The amount of the living material present in different trophic levels at a given time.
· Stratification: Formation of different layers or strata of different species in a community.
· Transducers: Photosynthetic autotrophs which convert solar energy into chemical bond energy of organic compounds.
· Winogradsky(1891): Discovered nitrogen fixation.
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