A substance given to stimulate the bodys production of antibodies and provide immunity against a disease, prepared from the agent that causes the disease, or a synthetic substitute. We compare the two in a bid to find out what they are responsible for. Density dependent factors affect a population through increasing or decreasing birth and death rates, in a way that is directly related to the density of the population. However, the field of population biology is different. The degree of control imposed by a density dependent factor correlates to population size such that the effect of the limitation will be more pronounced as population increases. The maximum number of individuals that can live in an area based on the density. Densitydependent limiting factors cause a populations per capita growth rate to.
In population ecology, densitydependent processes occur when. Densitydependent regulation can be affected by factors that affect birth and. A comparison of densitydependent and densityindependent. Explain the difference between density independent and density dependent limiting factors. Pdf density dependence and independence researchgate. Limiting factors that are density dependent usually cause the per capita growth rate to decrease, acting as a negative feedback loop to control the size of the population. A limiting factor is a resource or environmental condition which limits the growth, distribution or abundance of an organism or population within an ecosystem. Usually, the denser a population is, the greater its mortality rate. Density dependent limiting factors cause the per capita per individual growth rate of a population to change as the population gets larger.
Density independent factors, such as weather and climate, exert their influences on population size regardless of the populations density. To be specific, both densitydependent selection and. Such as food, water, and space density independent factors are factors that the population density depends on. Some relationships between densityindependent selection and. Negative density dependence may be an encouraging sign for the. Densitydependent and densityindependent population. In population ecology, density dependent processes occur when population growth rates are regulated by the density of a population. What is the difference between density dependent and. When a population of organisms becomes too large, the individuals will suffer because there will not be enough resources for everyone.
Density dependent factors density independent factors environmental resistance er population ecology a factor that causes higher mortality or reduced birth rates as a population becomes more dense is referred to as a density dependent factor. Density dependent and independent limiting factors. Various factors are employed to chart the population growth of species in order to ensure that it doesnt have any untoward effect on the ecosystem. Processes that occur when population growth rates are regulated by the size of a population in a given amount of resources such as food or habitat area vaccine. These determining factors are classified into density dependent and density independent factors. From the article yellow perch in lake winnipeg, identify and describe 5 of each type of limiting factor in the. Other articles where densitydependent factor is discussed.
Most density dependent factors, which are biological in nature biotic, include predation, inter and intraspecific competition, accumulation of waste, and diseases such as those caused by parasites. Density independent and dependent factors effects on population. Densitydependent factors include competition, predation, parasitism and disease. Unlike density independent factors, which are not tied to the population density, density dependent factors change how they affect the population as the population changes in size. Pdf density dependence occurs when the population growth rate, or constituent gain. Density independent and dependent factors effects on.