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Chapter: 12th Botany : Chapter 7 : Ecosystem

Glossary

Botany : Ecosystem : Glossary

Botany : Ecosystem

Glossary

 

Ecosystem: Study of interaction between living and non-living components

 

Standing quality: Total inorganic substances presents in any ecosystem at a given time and given area

 

Standing crops: Amount of living material present in a population at any time.

 

Biomass: Can be measured as fresh weight or dry weight of organisms

 

Benthic: Bottom zone of the pond

 

Trophic: Refers to the position of organisms in food chain

 

Omnivores: Those eats both plants and animals

 

Food chain: Refers movement of energy from producers up to top carnivores

 

Food web: Interlocking pattern of food chain

 

Pyramid of number: Refers number of organisms in a successive trophic level

 

Pyramid of biomass: Refers to quantitative relationship of the standing crops

 

Pyramid of energy: Refers transformation of energy at successive trophic levels

 

Ten per cent law: refers only 10 per cent of energy is stored in each successive trophic levels

 

Bio geo chemical cycle: Exchange of nutrients between organisms and environments

 

Carbon cycle: Circulation of carbon among organisms and environments

 

Guano: It is a accumulated excrement of sea birds and bats.

 

Phosphorus cycle: Circulation of Phosphorus among organisms and environments

 

Succession: Successive replacement of one type of plant communities by other on barren or disturbed area.

 

Pioneers: Invaded plants on barren area

 

Primary succession: Plants colonising on barren area

 

Secondary succession: Plants colonising on disturbed area.

 

Climax communities: Final establishment of plant communities which are not replaced by others.


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