Physical factors such as extreme cold, snow cover, storm, drought, etc will kill animals regardless of how many are present and thus are called density independent factors. Control of population numbers is usually effected by a whole range of factors rather than any single factor - these may be biotic or physical. Factors Affecting Speciation Top Reasons for Animal Population Decreases. The reason is that many things limit a population’s growth and size. Genetics of populations, also known as population biology, is a field of biology that studies the genetic makeup of animal populations as well as changes that occur as a product of various factors, such as natural selection. Students will work with a partner to create a visual representing the factors that affect animal populations. AnswerWhile there are clearly more than three things that influence animal population size, they can generally be divided into two main groups, abiotic (non-living) and biotic (living) factors. Wildlife refers to all the plant and animal species that survive in natural, wild areas throughout the world. Researchers also commonly study animal disease as it affects conservation of endangered populations. Population ecology is the study of the factors that determine the abundance of species and is concerned with the identification and mode of action of those environmental factors that cause fluctuations in population size and of those which determine the extent of these fluctuations. Factors could include predation, parasitism, food, … Human population density and land use is changing animal genetic diversity, according to a new study. Prompt students to list factors that could limit a population’s growth and size by asking them to think about the animals they saw in the previous video clip. population dynamics The study of the fluctuations that occur in the numbers of individuals in animal and plant populations and the factors controlling these fluctuations. In this, the populations are prevented from exchanging genes Therefore, it is difficult to distinguish between them. Population ecology, study of the processes that affect the distribution and abundance of animal and plant populations. Sympatric Speciation. Interbreeding and long-term survival often depend on connectedness between populations, closed populations being more isolated and having less contact with one another than more open populations. Animal Population Ecology focuses on the interaction between the various factors that affect an animal population. An important distinction is maintained between those factors that are dependent on population density and have a stabilizing effect (e.g. By Amber Pariona on August 14 2018 in Environment. The genetics of populations and the animal population . The factors affecting species and their habitats are often intertwined, and anthropogenic impacts may be exacerbated by … As human populations and activities in and around Oregon nearshore waters increase, so too do the impacts on fish, wildlife and the habitats they utilize. Habitat destruction is a major threat facing species. It refers to the evolution of new species from the surviving ancestral species in which both the species continue to live in the same geographical region.