Ecotope

Ecotopes are the smallest ecologically distinct <a href="/facts/Landscape/pU9HneR0">landscape</a> features in a landscape mapping and classification system. As such, they represent relatively <a href="/facts/Homogeneous/y84KQJxl">homogeneous</a>, spatially explicit landscape functional units that are useful for stratifying landscapes into ecologically distinct features for the measurement and mapping of landscape structure, function and change. 
Like <a href="/facts/Ecosystems/kVE8mSmR">ecosystems</a>, ecotopes are identified using flexible criteria, in the case of ecotopes, by criteria defined within a specific ecological mapping and classification system. Just as ecosystems are defined by the interaction of <a href="/facts/Biotic_component/fzEc9c8k">biotic</a> and <a href="/facts/Abiotic/CA3Dwtta">abiotic</a> components, ecotope classification should stratify landscapes based on a combination of both biotic and abiotic factors, including vegetation, soils, hydrology, and other factors. Other parameters that must be considered in the classification of ecotopes include their period of stability (such as the number of years that a feature might persist), and their spatial scale (minimum mapping unit). 
The first definition of ecotope was made by <a href="/facts/Thorvald_S%25C3%25B8rensen/RcpVpv5E">Thorvald Sørensen</a> in 1936. <a href="/facts/Arthur_Tansley/DuadhovW">Arthur Tansley</a> picked this definition up in 1939 and elaborated it. He stated that an ecotope is "the particular portion, [...], of the physical world that forms a home for the organisms which inhabit it". In 1945 <a href="/facts/Carl_Troll/lG4npJUP">Carl Troll</a> first applied the term to <a href="/facts/Landscape_ecology/dHH4IgVp">landscape ecology</a> "the smallest spatial object or component of a geographical landscape". Other academics clarified this to suggest that an ecotope is ecologically homogeneous and is the smallest ecological land unit that is relevant. 
The term "patch" was used in place of the term "ecotope", by Foreman and Godron (1986), who defined a patch as "a nonlinear surface area differing in appearance from its surroundings". However, by definition, ecotopes must be identified using a full suite of ecosystem characteristics: patches are a more general type of spatial unit than ecotopes. 
In <a href="/facts/Ecology/YE8upuJU">ecology</a> an ecotope has also been defined as "The species relation to the full range of environmental and biotic variables affecting it" (Whittaker et al., 1973), but the term is rarely used in this context, due to confusion with the <a href="/facts/Ecological_niche/YnhNkL2e">ecological niche</a> concept.

Ecotope open-in-new

Ecotope