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This territoriality only breaks down when there is a glut of food, for example when grizzly bears are attracted to migrating salmon. Food related territoriality is least likely with insectivorous birds, where the food supply is plentiful but unpredictably distributed. Swifts rarely defend an area larger than the nest.
Spatial ecology studies the ultimate distributional or spatial unit occupied by a species. In a particular habitat shared by several species, each of the species is usually confined to its own microhabitat or spatial niche because two species in the same general territory cannot usually occupy the same ecological niche for any significant ...
For example, if patch A contains twice as many resources as patch B, there will be twice as many individuals foraging in patch A as in patch B. The term "ideal" implies that animals are aware of each patch's quality, and they choose to forage in the patch with the highest quality. The term "free" implies that animals are capable of moving ...
Ecogovernmentality (or environmentality), is the application of Foucault's concepts of biopower and governmentality to the analysis of the regulation of social interactions with the natural world. The concept of Ecogovernmentality expands on Foucault's genealogical examination of the state to include ecological rationalities and technologies of ...
A map of the Amazon rainforest ecoregions. The yellow line encloses the ecoregions per the World Wide Fund for Nature. A map of the bioregions of Canada and the US. An ecoregion (ecological region) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm.
Each realm may include a number of different biomes. A tropical moist broadleaf forest in Central America, for example, may be similar to one in New Guinea in its vegetation type and structure, climate, soils, etc., but these forests are inhabited by animals, fungi, micro-organisms and plants with very different evolutionary histories.
In Britain Arthur Tansley was the first to apply phytosociological concepts to the vegetation of the kingdom in 1911 after learning of its application elsewhere in Europe. [19] Tansley eventually broadened the concept and thus came up with the idea of an ecosystem , combining all biotic and abiotic ecological aspects of an environment.
Terrestrial ecosystems occupy 55,660,000 mi 2 (144,150,000 km 2), or 28.26% of Earth's surface. [5] Major plant taxa in terrestrial ecosystems are members of the division Magnoliophyta (flowering plants), of which there are about 275,000 species, and the division Pinophyta (conifers), of which there are about 500 species.