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A population density map of Australia. Most of the continent is very sparsely populated, but only a few areas are truly deserted. Even the driest regions of Australia have indigenous communities within them. In 1984, a previously uncontacted family of Pintupi emerged from the Gibson Desert. [4]
Population fragmentation causes inbreeding depression, which leads to a decrease in genetic variability in the species involved. [4] This decreases the fitness of the population for several reasons. First, inbreeding forces competition with relatives, which decreases the evolutionary fitness of the species. [ 4 ]
For example, if a cleared area is reforested or allowed to regenerate, the increasing structural diversity of the vegetation will lessen the isolation of the forest fragments. However, when formerly forested lands are converted permanently to pastures, agricultural fields, or human-inhabited developed areas, the remaining forest fragments, and ...
Range of the snail Elona quimperiana, an example of a disjunct distribution. In biology, a taxon with a disjunct distribution is one that has two or more groups that are related but considerably separated from each other geographically. The causes are varied and might demonstrate either the expansion or contraction of a species' range.
Population density is the number of people per unit of area, usually transcribed as "per square kilometer" or square mile, and which may include or exclude, for example, areas of water or glaciers. Commonly this is calculated for a county , city , country , another territory or the entire world .
Any geographical area that is remote, isolated, undeveloped, or difficult to access, as contrasted with frontcountry; sparsely populated or uninhabited wilderness. See also bush. backshore The part of a seashore lying inland from the mean high water line, landwards of the foreshore, from which it is often delineated by the presence of a ...
Rural development is the process of improving the quality of life and economic well-being of people living in rural areas, often relatively isolated and sparsely populated areas. [1] Often, rural regions have experienced rural poverty , poverty greater than urban or suburban economic regions due to lack of access to economic activities, and ...
The geographical limits to the distribution of a species are determined by biotic or abiotic factors. Core populations are those occurring within the centre of the range, and marginal populations (also called peripheral populations) are found at the boundary of the range.