what is Ecosystem ?
Ecosystem-An ecosystem is a functional unit of nature consisting of biotic and abiotic factors, where the living organisms interact among themselves and also with their physical environment (abiotic factors).
what is Stratification ?
Stratification –Stratification in an ecosystem refers to the vertical distribution of different species occupying different levels.
Productivity-The rate of production of biomass, is called productivity.
What is primary productivity ?
Primary productivity –Primary productivity is defined as the amount of biomass or organic matter produced per unit area over a time period by the plants during photosynthesis.
What is secondary productivity ?
Secondary Productivity-Secondary productivity is defined as the rate of assimilation and formation of new organic matter by consumers.
What is decomposition ?
Decomposition-Decomposition is defined as the process in which the complex organic matter is broken down into simpler organic substances and ultimately into inorganic compounds.
what is Detritus ?
Detritus-The dead remains of plants and animals and also the faecal matter, constitute detritus.
Detritivorous-Detritivores are those organisms which feed on the detritus and break it down into smaller particles.
Food chain-Food chain refers to the transfer of energy (food )from the producer through a series of organisms.
Trophic level-Every steps or level in a food chain, is called a food web.
Consumers-All organisms/animals which depend directly or indirectly on plants for their food, are called consumers.
Herbivores-Herbivores are the primary consumers, which depend only on plants for their food needs.
Primary carnivores-These are the secondary consumers,which depend on the herbivores(primary consumers)for their food needs.
Secondary carnivores-These are the tertiary consumers,which depend on the primary carnivores(secondary consumers)for their food needs.
Biomass-The amount of living/organic matter present in an organism/a trophic level/an ecosystem,is known as biomass.
Standing crop-The amount of living matter (biomass)present at every trophic level,is known as standing crop.
Ecological Pyramids-The graphic representation of the trophic structure(organism in various trophic levels)of food chain, is called ecological pyramid.
Ecological succession-Ecological succession is community controlled phenomenon on which the structure and composition of communities change in an orderly and sequential manner, leading ultimately to the establishment of a climax community.
Sere-The entire sequence of communities that successively change in a given area resulting in a climax community, is called sere.
Pioneer species-The species which invade bare area and initiate the ecological succession,are called pioneer species.
Standing state-The amount of nutrients such as nitrogen,phosphorus,calcium etc,present in the soil,at any given time is called as standing state.
Biogeochemical Cylcle/Nutrient cycle-The continuous exchange of nutrients/elements among organisms and between organisms and their physical environment, is called Biogeochemical cycle.
Ecosystem services-The products of ecosystem processes are termed as ecosystem services.