How does population size affect biodiversity?
Population growth and increasing resource consumption affect biodiversity in two ways: They create pressure to convert wildlife habitat into agricultural and urban land; and. They produce wastes that pollute habitat and poison wildlife.
How does population size affect an ecosystem?
As population size approaches the carrying capacity of the environment, the intensity of density-dependent factors increases. For example, competition for resources, predation, and rates of infection increase with population density and can eventually limit population size.
Why does biodiversity matter what is the relationship between biodiversity and number of populations?
Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play. For example, A larger number of plant species means a greater variety of crops. Greater species diversity ensures natural sustainability for all life forms.
Why is biodiversity important to population?
Biodiversity is important to humans for many reasons. Ecological life support— biodiversity provides functioning ecosystems that supply oxygen, clean air and water, pollination of plants, pest control, wastewater treatment and many ecosystem services.
What are the four factors that affect population size in an ecosystem?
The four factors that determine population size are birth rate, death rate, emigration, and immigration.
What are factors influencing population size?
Population Growth Rate The two main factors affecting population growth are the birth rate (b) and death rate (d). Population growth may also be affected by people coming into the population from somewhere else (immigration, i) or leaving the population for another area (emigration, e).
What is the difference between biodiversity and total population size?
Biodiversity: The range of variation found among microorganisms, plants, fungi, and animals. Also the richness of species of living organisms. Community: Populations of organisms of different species that interact with one another. Population: A group of individuals belonging to one species living in an area.
How does biodiversity help sustain a population in an area?
Biodiversity, n. Greater biodiversity in ecosystems, species, and individuals leads to greater stability. For example, species with high genetic diversity and many populations that are adapted to a wide variety of conditions are more likely to be able to weather disturbances, disease, and climate change.
What is biodiversity population?
A group of individuals of the same species, occupying a defined area, and usually isolated to some degree from other similar groups. Populations can be relatively reproductively isolated and adapted to local environments. Millennium Ecosystem Assessment 2005 1.
How do human population and pollution affect biodiversity?
The main threats facing biodiversity globally are: destruction, degradation and fragmentation of habitats. reduction of individual survival and reproductive rates through exploitation, pollution and introduction of alien species.
What affects population size?
What are the three things that affect the size of a population?
Population growth rate is affected by birth rates, death rates, immigration, and emigration. If a population is given unlimited amounts of food, moisture, and oxygen, and other environmental factors, it will show exponential growth.