population ecology, study of the processes that affect the distribution and abundance of animal and plant populations. A population is a subset of individuals of one species that occupies a particular geographic area and, in sexually reproducing species, interbreeds.

2025年1月7日 · Population ecology, or autecology, examines single species. One immediate question that the subject addresses is why some species are rare while others are abundant. Interactions with other species may supply some of the answers.

Population ecology - Population Density, Growth, Interactions: An organism’s life history is the sequence of events related to survival and reproduction that occur from birth through death. Populations from different parts of the geographic range that a species inhabits may exhibit marked variations in their life histories.

Population ecology - Logistic Growth, Carrying Capacity, Density-Dependent Factors: The geometric or exponential growth of all populations is eventually curtailed by food availability, competition for other resources, predation, disease, or some other ecological factor.

Overall, the population ecology and dynamics of all species is a complex result of their genetic structure, the life histories of the individuals, fluctuations in the carrying capacity of the environment, the relative influences of all the different kinds of density-dependent and density-independent factors that limit population growth, the ...

2025年1月7日 · Ecology, study of the relationships between organisms and their environment. Some of the most pressing problems in human affairs—expanding populations, food scarcities, environmental pollution including global warming, extinctions of plant and animal species, and all the attendant sociological and

Population ecology - Life Tables, Growth Rate: Differences in life history strategies, which include an organism’s allocation of its time and resources to reproduction and care of offspring, greatly affect population dynamics.

Metapopulation, in ecology, a regional group of connected populations of a species. For a given species, each metapopulation is continually being modified by increases (births and immigrations) and decreases (deaths and emigrations) of individuals, as …

A population is made up of all members of the same species living within a given area. A single member of a population is called an individual. The area where a population lives can vary in size. The pine trees in a forest are a population as are the great white sharks in an ocean.

A growing population has more individuals in the lower age classes than does a stable population, and a declining population has more individuals in the older age classes than does a stable population (see population: Population composition).