what is biodiversity ecosystems populations

The most distinguishing characteristic of life is the boundless diversity in living forms. It is the total living (biotic) component of our bioshpere. Biodiversity can be defined as the variety and variability of all animals, plants and micro organisms found on earth. The diversity is due..

Biodiversity - Biodiversity refers to the totality of genes, species and ecosystems of a region. Biodiversity differs from place to place. The living world abounds with enormous biodiversity..

2 per litre of water. A weak organic waste has a BOD less then 1500 mg/ litre, a strong one has higher than this. A survey of the river Yamuna recorded BOD of 2000 at Delhi, 9000 at Mathura and 12,000 at Agra. Shifts in biodiversity of animals and plants in polluted ecosystem. ..

Habitat loss and fragmentation, disturbance and introduction of alien species pore greatest threats to biodiversity. Exotic species have large impacts in island ecosystems..

Levels of Biodiversity - Biological diversity includes 3 hierarchical levels. a) Genetic diversity b) Species diversity c) Community and ecosystem diversi..

It refers to the variation of genes within a species. The genetic diversity enables a population to adapt to its environment and to respond to natural selection. The amount of genetic variation is the basis of speciation. Genetic diversity within a species often increases with envir..

The word 'resource' means supplying a material generally held in reserve. The common natural resources include energy, air, water, land, minerals, microorganisms plants and animal..

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..

Diversity at the level of community and ecosystem exists along 3 levels. It could be within-community diversity (alpha diversity), between-communities diversity (beta diversity) or diversity of the habitats over the total landscape or geographical area (gamma diversity). Biogeographical r..

The characteristic structure of an ecosystem is obtained by the systematic physical organisation of the abiotic and biotic components of that particular ecosystem. The two main structural features of any ecosystem are its 'species composition' and 'stratification'. An ..