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.
·
Primary
Succession: 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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