aquatic ecosystems

An ecosystem is a self sustaining structural and functional unit of the biosphere. The ecosystem may be large or small. In the biosphere several ecosystems exist. Usually there is exchange of material and energy between adjoining ecosystems. Ecosystems..

An ecosystem may be natural (like forest, lake, ocean etc) or man-made (such as an aquarium, a crop field etc), temporary (like a rainfed pond) or permanent (like a lake, forest, etc), aquatic (such as pond, ocean etc) or terrestrial (like grassland, forest, etc..

Biome is a large, regional or sub continental biosystem characterized by a major vegetation type or other distinct landscape characters such as tropical deciduous forest, tundra biome, etc. "The major terrestrial ecosystems (largest ecological units) of distinctive terrestrial areas with ..

Pyramid of Numbers - "Pyramid of numbers is the graphic representation of number of individuals per unit area of various trophic levels stepwise with producers forming the base and top carnivores the tip..

.g., tigers normally do not eat fish or crabs, but Sunderbans they are forced to feed on them in the absence of their natural pre..

"Pyramid of biomass is the graphic representation of biomass present per unit area of different trophic levels, with producers at the base and top carnivores at the tip". The total amount of living or organic matter in an ecosystem at any time is called 'Biomass'. In a terrestrial ec..

Water is essential for life. The types of plants and animals distributed in water bodies greatly depends upon the nature of water, fresh water or sea water. The organisms have to face different problems of water scarcity or abundance, so osmoregulation is required for their proper functioning. Wat..

. Certain food chains may be very long and may extend to fourth, fifth or even higher order consumers. Food Chains in Aquatic Ecosystems In aquatic ecosystems of the biosphere, like fresh water ponds, lakes or sea, the food chain starts with microscopic free ..

o C to 9 o C. The metalimnion or thermocline which has rapid temperature changes between 9 o C to 21 o C. In the terrestrial environment the seasonal and daily fluctuations in temperature are varied and marked. The lowest temperature recorded for any land mass is - 70 o C (Siberia). Higher te..

: Include different types of soils, their fertility and vast biological wealth in them. Forest resource: Include all types of forests and other naturally grown plant sources. Crop resources: include all cultivated crops and their potentialities. Marine and aquatic resources: Include plant..