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 How are the concepts of chromosome, chromatids and chromatin related? In which phase of the cell cycle does the DNA duplicate? Chromatin is a set of filamentous the DNA molec
Q. Define Hepatic Cholesterol Synthesis? This is a highly complex process beginning with acetyl CoA formed from fatty acid oxidation or from carbohydrate breakdown. The rate-de
charactoristics of offset
regenerstion in invertebrates
Two homologous human chromosomes have the following structure: where the letters represent genetic markers and the black dot represents the centromere. 1. Diagram the two chromosom
Colibacillosis of poultry Colibacillosis is an important disease among poultry, especially among broiler chicks aged 6-9 weeks and less frequently of young chicks during first
What are nutritional issues related to neurological disorders? Nutritional management of the patients with neurological disease is complex, as mechanisms and abilities needed f
why is a potted plant destarched before starting the experiment to investigate the factors necessary for photosynthesis
S T ARC H - Polymer of a-D-glucose. Starch is glucosan homopolysaccharide which is the major reserve food of plants. Starch is formed as an end product of photosynt
Why Capsulate Staining is Difficult? Capsule staining is difficult because capsular material is soluble in water and may be dislodged or removed during vigorous washing. Negati
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd