Plant functional types (PFTs) refers to a grouping or classification system often used by ecologists and climatologists to classify plant species based on their similar functions and performances in an ecosystem. It is a way to simplify the complexity of plant diversity and behaviour in ecological models by grouping plants into categories that share common functional characteristics. This simplification helps researchers model vegetation dynamics which can be used in land use studies and climate models.[1]
PFTs provide a finer level of modeling than biomes,[1] which represent gross areas such as desert, savannah, deciduous forest. In creating models with PFTs, areas as small as 1 km2 are modeled by defining the predominant plant type for that area, interpreted from satellite data[1] or other means. For each plant functional type, a number of key parameters are defined, such as fecundity, competitiveness, resorption (rate at which plant decays and returns nutrients to the soil after death), etc. The value of each parameter is determined or inferred from observable characteristics such as plant height, leaf area, etc.[2]
Plant Functional Type (PFT) models have some limitations and problems. For example, it is difficult for climatologists and ecologists to determine which minimal set of plant characteristics best model the actual responses of the biosphere in response to climate changes.[2] Furthermore, by oversimplifying species to a few key traits, researchers may not capture the full diversity and variability of plant species within a given ecosystem or represent rare or unique species. As such, researchers are developing more sophisticated models, such as trait-based models, to address these problems.[3]
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"Plant Functional Types". Community Land Model. National Center for Atmospheric Research.
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Lavorel, Sandra; Díaz, Sandra; Cornelissen, J. Hans C.; Garnier, Eric; Harrison, Sandy P.; McIntyre, Sue; Pausas, Juli G.; Pérez-Harguindeguy, Natalia; Roumet, Catherine; Urcelay, Carlos (2007). "Plant Functional Types: Are We Getting Any Closer to the Holy Grail?". In Canadell, JG; Pataki, D; Pitelka, L (eds.). Terrestrial Ecosystems in a Changing World(PDF). The IGBP Series. Berlin: Springer-Verlag. ISBN 9783540327295.
^Van Bodegom, P. M.; Douma, J. C.; Witte, J. P. M.; Ordoñez, J. C.; Bartholomeus, R. P.; Aerts, R. (2011-12-20). "Going beyond limitations of plant functional types when predicting global ecosystem-atmosphere fluxes: exploring the merits of traits-based approaches". Global Ecology and Biogeography. 21 (6): 625–636. doi:10.1111/j.1466-8238.2011.00717.x. ISSN 1466-822X.
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