Characterstics of ecological population in india

standing crop) is a measurement of population per unit area

or unit volume; it is a quantity of type number density. It is frequently applied to living organisms, and particularly to humans. It is a key geographic term.

which the number of individuals in a population increases in

a given time period as a fraction of the initial population. Global human population growth amounts to around 75 million annually, or 1.1% per year.

rate) is the total number of live
births per 1,000 of

a population in a year.

a measure of the number of deaths (in general, or

due to a specific cause) in a particular population, scaled to the size of that population, per unit of time.

to females in a population. In the majority of species,

this is 1:1, the reasons for which are described in Fisher's principle. Some eusocial wasps, such as the Polistes fuscatus and the Polistes exclamans, seem to defy this ratio at times.

biotic potential of an organism is restricted by environmental resistance,

any condition that inhibits the increase in number of the population. It is generally only reached when environmental conditions are very favourable.

Shaped
Urn Shaped

India

country to which they are not native or do not

possess its citizenship in order to settle or reside there, especially as permanent residents or naturalized citizens, or to take-up employment as a migrant worker or temporarily as a foreign worker.

Immigration means the movement of people to a country.

with the intent to settle elsewhere. Conversely, immigration describes the

movement of persons into one country from another. Both are acts of migration across national boundaries.

Emigration means
m country.

is increasing, while a
Negative growth rate indicates that the population

is decreasing.

the replacement level of fertility), is a condition of demographic

balance where the number of people in a specified population neither grows nor declines, considered as a social aim by some. According to some, zero population growth is the ideal towards which countries and the whole world should aspire in the interests of accomplishing long-term environmental sustainability. What it means by ‘the number of people neither grows nor declines’ is that births plus in-migrants equal deaths plus out-migrants.