Ecosystem as a unit of nature , Biology

Assignment Help:

Ecosystem as a Unit of Nature

An ecosystem can be visualised as a functional unit of nature representing complex interactions between living and non-living components. The study of any ecosystem involves systematic description of the components and understanding of the close relationship between the biotic and the abiotic components. Why consider ecosystem as a unit of study? This, perhaps, is the question arising in your mind presently. If one wishes to study the various aspects of relationships of living and non-Jiving components of the environment, it would be easy to understand and interpret these relationships in a smaller component of the biosphere that is the ecosystem. We shall elaborate this further with the help of an example. Let us consider a village ecosystem. It is depicted here by the area enclosed within the dotted lines. The boxes within the village ecosystem represent three sub-systems namely: producers or 'crop plants, cattle and humans. The solid lines connecting the boxes represent the interactions. Solar energy, fertilisers and pesticides are the major inputs brought from outside the village ecosystem. These inputs determine the quantum of output, that is, food grain, fodder and other animal products which are exported from the village. So, you see that, the village ecosystem could be considered as a model to study the organisms and their environment as an integrated unit.

1909_Ecosystem as a Unit of Nature.png

Figure: A model of village ecosystem

Ecosystems are conceptual models and these models can be applied at any scale, from a bowl of water to the whole earth. Ecosystems represent enormous contrast in size and complexity. For the purpose of study, an ecosystem can be delineated in almost any way convenient to the interest of the investigator. In the case of some ecosystems such as lake, river or pond, distinct boundaries can be recognised but in the case of other ecosystems, such as a grassland, forest, village or town, boundaries are not so sharp however, they can be delineated according to the object of study or any other practical consideration.


Related Discussions:- Ecosystem as a unit of nature

Locomotion, discuss locomotion in annelids

discuss locomotion in annelids

Explain phylum coelentrat, Phylum Coelentrat a : (9,000 'species) The ...

Phylum Coelentrat a : (9,000 'species) The body is radial and made up of two cell layers. Gastro-Vascular cavity is saclike, tentacles and stinging cells are present. They may

Cytokinins and Cell Division, α - amylase activity by GA 3 - Dormancy ...

α - amylase activity by GA 3 - Dormancy Of the enzymes required for the digestion of starch α-amylase appears immediately after the start of germination. It was found that

Predisposing factors and pathphysiology of meningitis, Predisposing Factors...

Predisposing Factors The patients with diabets mellitus, malignancies and those on immunosuppressive drugs have reduced resistance and are more susceptible to develop meningi

Explain adverse effects of abacavir, Adverse effects of Abacavir  In 3-...

Adverse effects of Abacavir  In 3-9% of patients, a severe hypersensitivity reaction, usually with fever and sometimes with respiratory or gastrointestinal symptoms, malaise an

Classification levels of blood pressure, Table gives the current classifica...

Table gives the current classification of hypertension as recommended by JNC VII. The classification is based on the mean of two or more seated readings on two or more occasions.

Feeding mechanism in holozoic organism, write short note on feeding mechani...

write short note on feeding mechanism in holozoic organism

Foods incriminated, Foods that are frequently incriminated in staphylococca...

Foods that are frequently incriminated in staphylococcal food poisoning include meat and meat products, poultry and egg products, egg, tuna, chicken, potato and macaroni, bakery pr

Common disease of cattle & buffaloes, COMMON DISEASE OF CATTLE & BUFFALOES ...

COMMON DISEASE OF CATTLE & BUFFALOES - 1 .      Anthrax - Its symptoms are high temp, painless & warmthless swellings on different body parts. Bloody discharge from na

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd