subject %3e biology %3e biology i %3e ecology

which is defined as 'undesirable change in the physical, chemical or biological characteristics of air, water and land brought about by man's activities that may harmfully affect living organisms and other resources'. Based on the environmental component being polluted there are thre..

Biodiversity Changes in an ecosystem Fluctuations in population size in an ecosystem Water, carbon, and nitrogen - cycle between abiotic resources and organic matter in the ecosystem Oxygen cycles via photosynthesis and respiration Stability of producers and decomposers in an ecosystem ..

Biodiversity Changes in an ecosystem Fluctuations in population size in an ecosystem Water, carbon, and nitrogen - cycle between abiotic resources and organic matter in the ecosystem Oxygen cycles via photosynthesis and respiration Stability of producers and decomposers in an ecosystem ..

Ecological pyramids are also called 'Eltonian pyramids' after C. Elton. Charles Elton (1927) developed the concept of ecological pyramids who noted that "the animals at the base of a food chain are relatively abundant while those at the end are relatively few in numbe..

Ecological pyramids are also called 'Eltonian pyramids' after C. Elton. Charles Elton (1927) developed the concept of ecological pyramids who noted that "the animals at the base of a food chain are relatively abundant while those at the end are relatively few in number" Eco..

Ecological Succession - "The occurrence of relatively definite sequence of communities over a long period of time in the same area resulting in establishment of stable or climax community, is known as ecological or biotic succession". The first community which is inhabiting the ..

Ecological Adaptations - The part of the earth in which life exists is called biosphere. The biosphere consists of 3 major types of habitats. Aquatic habitat Terrestrial habitat Aerial or Arboreal habitat The special characteristics of plants and animals that enalbe them to be successful ..

The part of the earth in which life exists is called biosphere. The biosphere consists of 3 major types of habitats. Aquatic habitat Terrestrial habitat Aerial or Arboreal habitat The special characteristics of plants and animals that enalbe them to be successful in certain environmental conditions..

Causes of ecological succession are classified under two categori..

Ecological Adaptations - Xerophytes - These are plants adapted to grow in dry habitats. They are classified into three categories on the basis of their morphology and life - cycle patte..