Populationstructure is what the population is composed of, or it shows what is the makeup of a population. It divides the different gender of a place or communityspecifically males and females of different age groups.
The population pyramidshows how the males and females of different age group is divided, it is thegraphical illustration of the division of the two. Below is an example of apopulation pyramid. Thefigure above shows how the two gender with different age groups are dividedconsiderably.
The widest bar at the left side means that the largest populationin Kentucky are males with the age of 20-24 years old. While on the femaleside, the largest population among the age groups are 0-4 years old. The reasonof the large number of males in Kentucky is because it is the location of alarge military installation. So the bars on the side determine the gender andestimate the number of them while the middle part determine the age of thedifferent groups.PopulationDensity is the number of individuals per unit area.
Population density is determined by dividing the population by thearea. For example, if the Philippines has a population of 103 million peopleand an area of 300,000 km so the population density is 323.33 persons per square kilometer. Thereare two reasons that can affect population density, the input and the output.The inputs can be high birth rate or immigration. High immigration or birthrate can affect the density if it is not balanced with the output which isdeath or emigration.
If there is high inputs and low output, it can causeoverpopulation. Population,Energetic, Biomass and ProductionEnergyflow is the transfer of energy from trophic level to another trophic level.Solar energy is transferred from the sun to the plants or the producers andwill be taken in by the primary consumer whereas the energy transfers, it onlytransfer 90% of energy will be lost due to respiration. So the first consumeronly get 10% of energy while 1% for the secondary consumer and only 0.1% leftfor the tertiary consumer.
A lot of energy is lost between trophic levels, as aresult the last consumer receives the lowest energy. PopulationStrategies Thereare two general life strategists; these are the r and k strategists.Thoseliving beings portrayed as r-strategists regularly live in unsteady, eccentricconditions. Here the capacity to recreate quickly (exponentially) isimperative. Such life forms have high fertility (glossary) and generally littleinterest in any one descendants singular, they are normally powerless andsubject to predation and the changes of their condition. The “vitalplan” is to surge the living space with descendants so that, paying littleheed to predation or mortality, at any rate a portion of the offspring willmake due to recreate. Living beings that are r-chosen have short lifeexpectancies, are by and large little, snappy to develop and squander aconsiderable measure of vitality. Examples of these are salmon, corals, insectsand bacteria.
K-strategists,then again involve more steady situations. They are bigger in estimate and havelonger futures. They are more grounded or are better secured and by and largeare more vitality productive. They deliver, amid their life expectancies, lessdescendants, yet put a more prominent interest in each. Their regenerativeprocedure is to develop gradually, live near the conveying limit of theirliving space and deliver a couple of offspring each with a high likelihood ofsurvival.
Normal K-chose living beings are elephants, and people. The tablebeneath compresses a portion of the contrasts between r-life forms and K-lifeforms. Examples of these are monkeys, humans, and elephants.