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The North American Model of Wildlife Conservation is a set of principles that has guided wildlife management and conservation decisions in the United States and Canada. [1] Although not formally articulated until 2001, [ 2 ] the model has its origins in 19th century conservation movements , the near extinction of several species of wildlife ...
Ecoregions of North America, featuring the 50 United States, the District of Columbia and the five inhabited territories. The following is a list of ecoregions in the United States as identified by the World Wide Fund for Nature (WWF). The United States is a megadiverse country with a high level of endemism across a wide variety of ecosystems.
Shown in a museum, various models of species across various taxa and orders visualize the variety of life on earth. Biologists most often define biodiversity as the "totality of genes, species and ecosystems of a region".
The GLOBIO Model is a global biodiversity model developed by the Netherlands Environmental Assessment Agency to support policy makers by quantifying global human impacts on biodiversity and ecosystems. [1] [2] [3] It is designed to quantify human impacts on biodiversity at large (regional to global) scales. [4]
The models allow for interpolation between a limited number of species occurrences. For these models to be effective, it is required to gather observations not only of species presences, but also of absences, that is, where the species does not live.
An all-taxa biodiversity inventory, or ATBI, is an attempt to document and identify all biological species living in some defined area, usually a park, reserve, or research area. The term was coined in 1993, in connection with an effort initiated by ecologist Daniel Janzen to document the diversity of the Guanacaste National Park in Costa Rica. [1]
The model then uses birth, death, immigration, extinction and speciation to modify community composition over time. Hubbell's theta. The UNTB model produces a dimensionless "fundamental biodiversity" number, θ, which is derived using the formula: θ = 2J m v. where:
International Cooperative Biodiversity Groups (or ICBG) is a program under National Institutes of Health, National Science Foundation and USAID established in 1993 to promote collaborative research between American universities and research institutions in countries that harbor unique genetic resource in the form of biodiversity—the practice known as bioprospecting.