Primary succession - community change, Biology

Assignment Help:

Primary Succession - Community Change

In primary succession on a terrestrial site the new site is first colonised by a few hardy pioneer species that are often microbes, lichens and mosses. The pioneers over a few generations alter the habitat conditions by their growth and development. These new conditions may be conducive to the establishment of additional organisms that may subsequently arrive at the site. The pioneers through their death any decay leave patches of organic matter in which protists and small animals can live.

'The organic matter produced by these pioneer species produce organic acids during decomposition that dissolve and etch the substratum releasing nutrients to the substratum. Organic debris accumulates in pockets and crevices, providing soil in which seeds can become lodged and grow. As the community of organisms continues to develop, it becomes more diverse and competition increases, but at the same time new niche opportunities develops. The pioneer species disappear as the habitat conditions change and invasion of new species progresses, leading to the replacement of the preceding community. Similarly, primary succession in aquatic habitat also develops through a number of seral communities.


Related Discussions:- Primary succession - community change

Explain about health economics and economics of malnutrition, Explain about...

Explain about the Health Economics and Economics of Malnutrition? In the earlier units on nutritional problems, we learnt that there are many causes of malnutrition, socioecono

Explain enzyme inhibition, ENZYME INHIBITION Enzymes are often inhibite...

ENZYME INHIBITION Enzymes are often inhibited by  the presence of  suitable inhibitors. Much of current drug therapy  is based  on this. Basically, there  are  three major  cla

What are the stages of soil, What are the Stages of soil The developmen...

What are the Stages of soil The development of soil takes place in two stages. In the first stage there is formation of parent material which is generally consolidated and cons

What is the numeric relation between purine bases, Q. What is the numeric r...

Q. What is the numeric relation between purine and pyrimidine bases in the DNA molecule? Is that relation valid in the RNA molecules? The DNA molecule is made of two bound poly

Define multiple tube fermentation test, Define Most Probable Number Test (M...

Define Most Probable Number Test (Multiple Tube Fermentation Test)? Presence of coliforms in the water sample can be detected by performing multiple tube fermentation test whic

Emergence of contemporary biology, EMERGENC E OF CONTEMPORARY BIOLOGY - ...

EMERGENC E OF CONTEMPORARY BIOLOGY - 1 .       Aristotle (384-322BC) - Greek Classified animal species and arranged them in hierarchies. Formulated 'Great chain of

What are the advantages of yoga, What are the advantages of Yoga Yoga h...

What are the advantages of Yoga Yoga has been derived from the Sanskrit word Yuj which means union. It is popular since ancient times. It is also one of the means to maintain f

What are the functions of the spleen, Q. What are the functions of the sple...

Q. What are the functions of the spleen? Why is a total splenectomy (surgical removal of the spleen) compatible with life? The spleen has many functions: it participates in the

Define phosphorous distribution in plasma, Define Phosphorous distribution ...

Define Phosphorous distribution in plasma? In plasma, phosphorus is distributed in different forms. Figure: Phosphorous distribution in plasma Inorg

How much fats should be taken for management of obesity, How much Fats shou...

How much Fats should be taken for management of obesity? Fats, being a concentrated source of energy need to be restricted. Excess dietary fat promotes much more weight gain th

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