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Phytogeography (from Greek φυτόν, phytón = "plant" and γεωγραφία, geographía = "geography" meaning also distribution) or botanical geography is the branch of biogeography that is concerned with the geographic distribution of plant species and their influence on the earth's surface. [1]
The scheme is one of a number developed by Biodiversity Information Standards particularly aimed at taxonomic databases. [2] The starting point was the "need for an agreed system of geographical units at approximately 'country' level and upwards for use in recording plant distributions". [1]
The system provides clear definitions and codes for recording plant distributions at four scales or levels, from "botanical continents" down to parts of large countries. Current users of the system include the International Union for Conservation of Nature (IUCN), and the Germplasm Resources Information Network (GRIN). [ 1 ]
The following categorization scheme is the result of a project to have our flora geographic categories follow the World Geographical Scheme for Recording Plant Distributions: Brummitt, R. K. (2001). World Geographical Scheme for Recording Plant Distributions: Edition 2 (PDF). Biodiversity Information Standards—TDWG.
The geographic limits of a particular taxon's distribution is its range, often represented as shaded areas on a map. Patterns of distribution change depending on the scale at which they are viewed, from the arrangement of individuals within a small family unit, to patterns within a population, or the distribution of the entire species as a ...
[1] 30% of all evaluated plant species are listed as least concern. The IUCN also lists 131 subspecies and 118 varieties as least concern. No subpopulations of plants have been evaluated by the IUCN. This is a complete list of least concern plant species, subspecies and varieties evaluated by the IUCN.
Health geography is the application of geographical information, perspectives, and methods to the study of health, disease, and health care. Medical geography , a sub-discipline of, or sister field of health geography, [ 1 ] focuses on understanding spatial patterns of health and disease in relation to the natural and social environment.
Environments with a wide variety of habitats such as different topographies, soil types, and climates are able to accommodate a greater amount of species.The leading scientific explanation for this is that when organisms can finely subdivide a landscape into unique suitable habitats, more species can coexist in a landscape without competition, a phenomenon termed "niche partitioning."