Shrub stage - xerarch, Biology

Shrub Stage - Xerarch

Sufficient soil is formed in the herbs stage, for supporting the woody plants or the shrubs. They migrate with the help of seeds or rhizomes from the adjacent areas. Examples are: species of Rhus and Physocarpus. The shrubs soon develop into dense vegetation. The habitat is considerably modified. The herbs are shaded by the overgrowing shrubs. They no longer find it possible to thrive in such a situation and are, therefore, completely replaced by the shrubs.

The shrubby vegetation adds a lot of organic matter to the soil, through leaves and other plant parts. The soil is thus enriched with considerable amount of humus. The huge mass of roots of the shrubs corrodes the rocks. The enriched soil attains greater capacity for holding water. The soil is shaded, and, therefore, evaporation of water is considerably reduced. The humidity is increased over such areas. All these favour the growth of seedlings of trees which start invading the area.

Posted Date: 1/21/2013 12:23:07 AM | Location : United States







Related Discussions:- Shrub stage - xerarch, Assignment Help, Ask Question on Shrub stage - xerarch, Get Answer, Expert's Help, Shrub stage - xerarch Discussions

Write discussion on Shrub stage - xerarch
Your posts are moderated
Related Questions
Explain Asystole and Pulseless Electrical Activity (PEA) The outcomes from these rhythms are generally much worse than for VT/VF, unless a readily correctable cause is identif

Is a viral infection treated with the same kind of drug that treats bacterial infections? Antibacterial drugs, potent against a great variety of bacteria, are not effective aga

EXTINCTIO N  - It refers to disappearance of a species from earth when its last surviving member dies. Organic evolution not only creats new sps. but also eliminates some ol

Explain Mechanism of Absorption of Haem Iron? Haem iron is soluble in the alkaline environment of the intestine. It binds to the receptor on the enterocytes and is internalized

Explain Cooperative behaviours of social animal group Group living, specialist roles, eg bees, ants Altruism, eg social insects, meerkats Group defence, eg social

Global Air Circulation The major wind systems of the earth result because large masses of air around the earth's equator are forced to rise from the bottom due to surface heati


Water has key participation in organic reactions. What are examples of two types of organic reactions in which water is respectively incorporated or liberated in the products of th

Q. What is the average incubation period of Chagas' disease? What are some signs and symptoms of the acute phase of Chagas' disease? The Chagas' disease may or may not present

Define Physical and Physiological Changes? Every stage has its unique requirements due to different changing needs. With respect to nutrition and health, four different basic a