ECOLOGY AND ENVIRONMENT

Organisms and Environment: Ecology, population, communities, habitat, niche, biome and ecosphere (definitions only) Ecosystem: Elementary aspects onlyAbiotic factors- Light, Temperature & Water(Biological effects only), Ecological adaptationsPopulation interactions Ecosystems: Types, Components, Lake ecosystem Food chains, Food web, Productivity and Energy flow in Ecosystem, Ecological pyramids– Pyramids of numbers, biomass and energy.Nutritient cycling – Carbon, Nitrogen, & Phosphorous cycles (Brief account)Population attributes: Growth, Natality and Mortality, Age distribution, Population regulation,Environmental issues.