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Note: This section provides a general summary of niche apportionment theory, more information can be found under niche apportionment models. Most mechanistic approaches to species abundance distributions use niche-space, i.e. available resources, as the mechanism driving abundances.
The fisher (Pekania pennanti) is a carnivorous mammal native to North America, a forest-dwelling creature whose range covers much of the boreal forest in Canada to the northern United States. It is a member of the mustelid family, and is the only living member of the genus Pekania. It is sometimes referred to as a fisher cat, although it is not ...
It uses between 20 and 33% of the world's fresh water, [81] Livestock, and the production of feed for them, occupy about a third of the Earth's ice-free land. [82] Livestock production contributes to species extinction, desertification, [83] and habitat destruction. [84] and is the primary driver of the Holocene extinction.
Common in captivity, rare in native habitat, common in introduced range 1e Other mammals: Koi (Cyprinus rubrofuscus) Amur carp (Cyprinus rubrofuscus) the 11th century CE: Japan: ornamental, show, pets Tame, considerable physical changes Fairly common in captivity, threatened in the wild 5a Cyprinidae: Japanese quail (C. japonica) or ...
The eastern cattle egret (Ardea coromanda) is a species of heron (family Ardeidae) found in the tropics, subtropics and warm temperate zones.Formerly, most taxonomic authorities lumped this species and the western cattle egret together (called the cattle egret), but the two cattle egrets are now treated as separate species.
The livestock sector also includes wool, egg and dairy production, the livestock used for tillage, and fish farming. Animal agriculture is a significant contributor to greenhouse gas emissions . Cows, sheep, and other ruminants digest their food by enteric fermentation , and their burps are the main source of methane emissions from land use ...
On average, cattle will consume 1.4 to 4% of their body weight daily. [8] There is a range of types of feed available for these animals. The standard text in the United States, Nutrient Requirements of Beef Cattle, has been through eight editions over at least seventy years. [9]
Agricultural expansion describes the growth of agricultural land (arable land, pastures, etc.) especially in the 20th and 21st centuries.. The agricultural expansion is often explained as a direct consequence of the global increase in food and energy requirements due to continuing population growth (both which in turn have been attributed to agricultural expansion itself [1] [2]), with an ...