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
Hounsfield Units: It is an arbitrary scale of gray values for CT. It is an indicator of bone density: - Trabecular bone has a range of 200 - Cortical bone has a range

function of epithelial tissue

What is signified by saying that in relation to a given trait conditioned by a gene with two different alleles the gametes are always "pure"? To say so that the gametes are pur

Assortment is a method in which the meiosis produces new combinations of the genetic information. The paternal and maternal chromosomes line up randomly during the process of syna

The Eukaryotic cells have five several DNA polymerases; α, β, γ, δ or ε. The DNA polymerases contained in replication of chromosomal DNA are α and δ. DNA polymerases β or ε are con

Explain about the Zone Electrophoresis? Zone electrophoresis which was introduced about a decade later describes the migration of charged macromolecules in a porous supporting

#question.3 different genera of invertebrates

In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube? 1. Embryo only, upto 8 cell stage 2. Either zygote or ear

Q. Various types of microorganisms? Microbes are single-cell organisms so tiny that millions can fit into the eye of a needle. They are the oldest form of life on earth. Micro

explain the relationship between concentration gradient and active and passive transport