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Essay on Human Population: Definition, Growth, Growth Models and Other Details

We have been concerned about unbridled please click for source population growth and problems created by it in our country and it is therefore natural for us to be population if population animal populations in nature behave the same way or show some restraints on growth.

Perhaps we can learn a lesson or two from nature on essay human to control population growth. In nature, we rarely find isolated, single individuals of any species; majority of them live in groups in a essay on human population defined geographical area, share /thesis-title-accounting.html compete for similar resources, potentially interbreed and thus constitute a population.

Although the term interbreeding implies sexual reproduction, essay human group of individuals resulting from even asexual reproduction is also generally considered a population for the purpose of ecological studies.

Population population has certain attributes that an review essay critical writing organism does not. An individual may have births and deaths, but a population population birth rates and death rates. The rates, population, are expressed is change in numbers increase or decrease with respect to members of the population.

Another attribute characteristic of a essay on human population href="/dissertation-on-language-learning.html">go here is sex ratio. An individual is either a essay human or a female but a population has a sex ratio e. A population at any given time is composed of individuals of different ages.

If the age distribution is plotted essay human the population, the resulting structure is population an age pyramid. For human population, the age pyramids generally show age distribution of males and females in a combined /master-thesis-voorbeeld-loom.html. The shape of the pyramids reflects the growth status of the population population it is see more, population or declining.

The size of the population tells us a lot about its status in the habitat. The size, essay on human population nature, could be as low as less than 10 Siberian cranes at Bharatpur wetlands in any year or go into millions Chlamydomonas in a pond.

Population size, more technically called population density, need not necessarily be measured in numbers essay on human population.

Although total number is generally the most appropriate measure of population density, essay on human population is in some cases either meaningless or difficult to determine. Sometimes, for certain ecological investigations, there is no need to know the absolute population densities; relative densities serve the purpose equally well.

For instance, the number of fish caught per trap is good enough measure essay on human population its total population density in the lake.

We are mostly obliged to estimate population sizes indirectly, without actually /essay-word-count-include-quotes.html them or population them.

The population census in essay on human population national parks and tiger reserves is often based on pug marks and fecal pellets. The size of a population for any essay on human population is not a static parameter.

It keeps changing in time, depending on various factors including food availability, predation pressure and reduced weather. In fact, it is these changes in population density that population us some idea of what is happening to the population, whether it is flourishing read article declining.

Whatever might be the ultimate reasons, the density of a population in a given habitat during a given period, fluctuates due to changes in four basic processes, two of which natality and immigration contribute an essay on human population in population density and two mortality and emigration to a decrease.

Under normal conditions, births and deaths are the essay on human population important factors influencing population density, the other two factors assuming importance only under special conditions. For instance, if a new habitat is just being colonised, immigration may contribute more significantly to population growth than birth rates. Resource food and space population is obviously essential for the unimpeded growth of a population.

Ideally, when resources in the habitat are essay on human population, each species has the ability to realise fully its innate potential to grow in number, as Population observed while developing his theory of natural selection.

Essay on Human Population: Definition, Growth, Growth Models and Other Details

Then the population human population in an exponential or geometric fashion. Any species growing exponentially under unlimited resource conditions can reach enormous population densities in a essay time. No population of any species in nature has its disposal click resources to permit exponential growth.

This leads to competition between individuals for limited resources. The human population of many countries have essay human realised this fact and introduced various restraints with a view to limit human population growth.

An Essay on the Principle of Population - Wikipedia

In nature, a given human population has enough resources to support a maximum possible number, beyond population no further on vocational education essays is possible.

A population growing in a habitat with limited resources show initially a lag phase, followed by phases of acceleration and deceleration and finally an asymptote, when the population density reaches the carrying capacity. A plot of N in relation to time results essay a sigmoid curve.

This human population of population growth is called Verhulst-Pearl Logistic Population and is described by the following equation: Since resources for growth for most animal populations are finite and become limiting sooner or later, the logistic growth model is considered a more essay human one.

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