Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Community Change
Ecosystems are dynamic entities in which a number of events take place. Associated with the biotic communities of the ecosystem are some changes, which may be either small-scale changes or large-scale changes. Small-scale changes may be brought about by natural causes or by the activities of man. One of the examples of small-scale changes is a stream, in which some sewage is accidentally dumped. In such a case there would be an Increase in the organic and inorganic chemicals in the water. The organic molecules are consumed by bacteria. With the increased availability of organic matter, the number of bacteria would increase.
Bacteria use up oxygen as they consume organic materials, thus the level of oxygen in the stream usually drops. This can kill the fish and other organisms or cause them to migrate new areas. In due course of time, the stream will return to normal. The bacteria will die if the level of organic matter falls off, and dissolved oxygen will return to normal, thus allowing fish to return. This example, clearly shows that the biotic community of an ecosystem may be temporarily affected by the small scale changes. On the other hand, there are certain long-term changes in the ecosystem which can permanently change the organisation and composition of biotic communities. These long-term changes may be caused by factors like volcanic eruptions, landslides, earthquakes, floods, hurricanes, and of course human interventions such as mining and deforestation. All these disturbances, change the habitat considerably. A variety of species invade the changed or disturbed site, and eventually over a period of time, a new community develops there. This process continues - one community replacing another community, until a stable, mature community develops.
Q. What is the parasite that causes toxoplasmosis? How is the disease transmitted and what are its typical manifestations? The Toxoplasmosis is caused by the protozoan Toxoplas
Explain Strengthening the public health measures? Parasitic infestations and protozoal infections cause iron deficiency through loss of blood or destruction of red blood cells.
How can I fuck my girlfriend without taking out cum?
FOOD Food consists of H O, minerals, vitamins carbohydrate, lipid & protein. A person needs 1600 cal. per day. This is BMR (Basal metabolic rate). Needed 2500 cal. per
What are the advantages of the closed circulatory system over the open circulatory system? The closed circulatory system is more efficient. As blood circulates only inside bloo
by our eyes we can see the beautiful world but is there anything in our eyes which makes it beauiful??
Explain about the Drying - methods of food processing? Drying is the oldest and probably the simplest way of preserving food. It is usually accomplished by the removal of water
The cell membrane is a slim semi-permeable membrane which surroundings the cytoplasm of a cell. Membrane function is to defend the integrity of the interior of the cell by allowing
Q. Fats requirements for ulcerative colitis? Usual foods, which contain fats (invisible or inherent fat), are permitted but not fried foods, as they are not easily digested due
Question 1 Write a short note on the following- Theory of clonal selection Interferons Super antigens Helper T cells Auto immunity Active Immunization
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd