Wind as a medium for dispersal, Biology

Wind as a medium for Dispersal

Many microorganisms, fungal spores and bacteria are freely transported over long distances even by moderate winds. In wind pollinated plants, the amount of pollen grains is relatively large because a large fraction of it may be wasted. Pollen grains in some genera like Pinus are specially adapted to float in air due to the presence of air bladders. Many plants produce extremely small seeds, others develop winglike structures or fine silky hairs that help them to float in air (Figure shown below). Wind is a universal agent for the dispersal of fruits and seeds which helps in better establishment of seedlings resulting in greater success of survival and healthy growth by avoiding competition.

Dispersal of pollutants

Wind determines the extent of initial dilution of pollutants, emissidn, direction and rate of dispersal. The more widely and rapidly they are dispersed, lesse~w ill be their impact on the environment. If the wind speed is high, pollutant concentrations are likely to be relatively low, while low wind or absence of wind builds up high concentration of pollutants.

2190_wind as dispersal.jpg

Figure: Fruits (a) and seeds (b) d plants adapt for distance transportation by wind.

Posted Date: 12/10/2012 7:25:00 AM | Location : United States







Related Discussions:- Wind as a medium for dispersal, Assignment Help, Ask Question on Wind as a medium for dispersal, Get Answer, Expert's Help, Wind as a medium for dispersal Discussions

Write discussion on Wind as a medium for dispersal
Your posts are moderated
Related Questions
How many different molecules composed of (A) two (B) three, and (C) four amino acids, linked together by peptide bonds, can be made from the set of 20 naturally occurring amino aci

Q. Why is the Krebs cycle also called the final common pathway of the degradation of organic compounds? The Krebs cycle is known as the final common pathway of the degradation

State in brief about the nuclear DNA The nuclear DNA is distributed between two or more chromosomes, the number of which varies among different eukaryotes, and is characterist

Explain about the Gel bands detection techniques? Gel bands, resulting from a gel electrophoretic separation, may be detected by staining, radioactive counting or immunoblottin

Define Malnutrition - Effects on Milk and Effects on Mothers? Milk is the sole source of nourishment for many infants for upto 6 months or a year or even more. Therefore, the r

Determine about the Sense of  Contrast It is  the ability to  perceive  slight changes  in  luminance between  regions which  are not  separated by  definite borders. This  is

what''s a mature female sheep called


How do sponges try to protect themselves against harm from the environment? Is that method efficient or rudimentary? Sponges can close their pores to avoid the entrance of wate

A flashlight with a 6-volt bulb draws 2 amps from its batteries. What is the resistance of its circuitry?