Mass dispersal - population dispersal, Biology

Mass Dispersal - Population Dispersal

A population is inherently dynamic in nature since individuals are always leaving or entering the populations. But such changes normally do not affect the size of a population. It is because emigrations balance immigrations or because gains and losses in terms of entry and exit of individuals are compensated by changes in natality and mortality. However, mass dispersal may bring out rapid changes in the population e.g., immigration may speed up population growth or in case of extreme reduction may prevent extinction.

Mass dispersal affects the balanced population in other ways also e.g., the immigration of large number of blue gill fishes into a pond already full of blue gill population may result in reduced growth of the fish population and also result in smaller average size of fishes due to environmental limitations. So even though the biomass density remains unchanged, the size of fishes may be much reduced affecting the fishing process.

Posted Date: 1/21/2013 1:10:39 AM | Location : United States







Related Discussions:- Mass dispersal - population dispersal, Assignment Help, Ask Question on Mass dispersal - population dispersal, Get Answer, Expert's Help, Mass dispersal - population dispersal Discussions

Write discussion on Mass dispersal - population dispersal
Your posts are moderated
Related Questions
A diploid cell contains four pairs of homologous chromosomes designated C1 and C2, M1 and M2, S1 and S2, and W1 and W2. Predict the number of different haploid cells that could be

How Water Balance Take Place in Human Body? The amount of fluid in the body is tightly controlled because imbalance can be devastating. In a normal individual, the maintenance

how a simple medium can be converted into selective differential and enriched medium?

Explain how a water molecule is produced when glucose and fructose undergo a condensation reaction. The glucose molecule releases a hydroxide ion, OH -, and the fructose molec

What are cell movements? How are these movements created? Cell movements are movements done by cell structures, like the movements of cilia and flagella, the pseudopod movement

What would occur to the successive trophic levels in the pyramid of energy if the rate of reproduction of phytoplankton was slowed down? Suggest two factors, which could cause l

Q. What are the cell movements and how are these movements created? Cell movements are movements executed by cell structures, like the movements of flagella and cilia, the pseu

Q. What are the cnidocytes? What is the name of the capsule inside the cnidocyte? What are the biological functions of this structure? Cnidocytes are specific cells present in

Q. What is the difference between the concepts of genome and karyotype? Genome is the set of DNA molecules that characterizes each species or each living being. The concept the

The eukaryotic cell can be separated into two major portions: the cell membrane that divides the intracellular space from the outer space phisically delimiting the cell; the cytopl