Primary succession - community change, Biology

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.

Posted Date: 1/19/2013 8:12:06 AM | Location : United States







Related Discussions:- Primary succession - community change, Assignment Help, Ask Question on Primary succession - community change, Get Answer, Expert's Help, Primary succession - community change Discussions

Write discussion on Primary succession - community change
Your posts are moderated
Related Questions
#question.unique features of amoeba.

Explain the DNA structure in details? Structure :  Each DNA molecule is a double stranded polymer, consisting of perhaps thousands or millions of linked nucleotides. The two

Cleft grafting  The stem of the stock is cut across. A 'V' shaped insertion is made at the end of the stock. The scion is cut in shape. The scion is inserted into the 'V'

Explain about the Sensory Neuropathy There is decreased sensory perception by foot for any external stimuli making foot prone to various injuries. Due to lack of pain does not

Q. Do the arteries that carry blood from the heart to the lungs contain arterial or venous blood? What happens to the blood when it passes through the lungs? Arteries of the pu

you are setting up a pcr reaction to amplify a 1000 basepair long dna grament. in your 50 microliter reaction volume you have 100 nanogrM OD RWMPLrw sn QIRH eoufly 50/50 at/gc 100

Explain the process of Absorption of Fats? After digestion, only 25% of triglycerides are broken completely to glycerol and fatty acids. Major digestion product is 2-monoacylgl

which bone forms the non-moving muscle attachment in the hip joint

Sphaerosome Also known as Plant lysosome , because they contain hydrolytic enzymes. Hanstei n first observed them and called microsomes . Discovered by Dangeared

Q. Show Upsloping ST-Segment? There are few subjects in exercise literature that has generated more controversy than the significance of up sloping ST-segments. The up sloping