Video-6-Levels of Organization in Ecology-Individual, Population and Community-Major and Minor. скачать в хорошем качестве

Video-6-Levels of Organization in Ecology-Individual, Population and Community-Major and Minor.

Environment and Ecology for IAS, PCS, CTET, STET, and other exams by Learning Curve Ecology is the branch of biology concerned with the relations of organisms to one another (energy flow and mineral cycling) and their physical surroundings. Ecology encompasses the study of individuals, organisms, populations, community, ecosystem, biome and biosphere, which form the various levels of ecological organization. Individual and Species An organism is an individual living being that can act or function independently. Species are a group of living organisms consisting of similar individuals capable of exchanging genes or of interbreeding. Population The population is a community of the same species occupying a defined area during a specific time. Population growth rate can be positive due to birth and immigration or negative due to death and emigration. Community Communities, in most instances, are named after the dominant plant form. For example, a grassland community is dominated by grasses, though it may contain herbs, trees, etc. Major Communities These are large-sized and relatively independent. They depend only on the sun’s energy from outside. E.g., Tropical evergreen forests. Minor Communities These are dependent on neighboring communities. They are secondary aggregations within a major community. E.g., A mat of lichen on a cow dung pad.