sang asked in Science & MathematicsBiology · 1 decade ago

how population size and density affects sustainability of an ecosystem?

explain how population size and density affects sustainability of an ecosystem?

4 Answers

  • 1 decade ago
    Favorite Answer

    Density Dependent Factors. Increasing population size reduces available resources limiting population growth. In restricting population growth, a density-dependent factor intensifies as the population size increases, affecting each individual more strongly. Population growth declines because of death rate increase, birth rate decrease or both. There is a reduction in the food supply which restricts reproduction resulting in less offspring. The competition for space to establish territories is a behavioral mechanism that may restrict population growth. Predators concentrate in areas where there is a high concentration of prey. As long as the natural resources are available, in sufficient quantity, the population will remain constant. As the population decreases so do the predators. The accumulation of toxic wastes may also limit the size of a population. Intrinsic factors may play a role in limiting a populations size. High densities may cause stress syndromes resulting in hormonal changes that may delay the onset of reproduction. Immune disorders are also reported to be related to stress in high densely populated areas.

    Density-Independent Factors. Weather, climate, and natural disasters such as freezes, seasonal changes, hurricanes, and fires are examples. These factors are unrelated to population size and affect everyone in the population regardless of population size.

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  • ?
    Lv 7
    1 decade ago

    an ecosystem can maintain a certain population and for the earth we are about there with 6 billion alive.

    population density does not affect the ecosystems ability to hold that size but it does effects the populations ability to gain access to food as the higher the density the better the transport and distributions the populations must use to deliver the food and remove wastes.

    if there was a breakdown of society the ecosystem can maintain the same population but those in high density situations would suffer as they would lose access to food,water and waste disposal while those in rural areas would basically be unaffected but have an large excess of food!

    if society is breaking down move to the country to increase your survival.

    with higher population densities the birthrate tends to be higher are people are more likely to mix however as the population density increases linearly nature has its own inbuilt population control in that the incidence of disease and homosexual tendencies will increase proportional to the square of the population density making it a self limiting factor.

    Source(s): socio-economic research on effects of increasing population density on incidence of homosexuality. University of London & UCLA
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  • Anonymous
    1 decade ago

    Living organisms use resources and generate waste. If a place is overpopulated, that means that there population size and density is so high that there are not enough resources to support the number of living organisms in that place. This may lead to deaths due to lack of food, water etc. This results in the place being unsustainable, that is, the amount of resources present in that place are not able to support the present and future populace.

    Deaths of any type of living organisms will affect food chains as well as the ecosystem in general.

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  • Phil
    Lv 5
    1 decade ago

    In natural systems, most species populations are regulated by the available habitat, resources, energy entering the system (or primary productivity), and the number and type of competitors in the area. A population will grow until it reaches it's carrying capacity. Carrying capacity is defined as the maximum population size that a given ecosystem can sustainably support.

    Human's have increased our carrying capacity with agriculture and technology.

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