Scholes, RJArcher, SR2007-06-292007-06-291997Scholes. RJ and Archer, SR. Tree-grass interactions in savannas. Annual Review Of Ecology And Systematics, Vol. 8, pp 517-5440066-4162http://hdl.handle.net/10204/771Copyright: 1997 Annual Reviews IncSavannas occur where trees and grasses interact to create a biome that is neither grassland nor forest. Woody and gramineous plants interact by many mechanisms, some negative (competition) and some positive (facilitation). The strength and sign of the interaction Varies in both time and space, allowing a rich array of possible outcomes but no universal predictive model. Simple models of coexistence of trees and grasses, based on separation in rooting depth, are theoretically and experimentally inadequate. Explanation of the widely observed increase in tree biomass following introduction of commercial ranching into savannas requires inclusion of interactions among browsers, grazers, and fires, and their effects on tree recruitment. Prediction of the consequences of manipulating tree biomass through clearing further requires an understanding of how trees modify light, water, and nutrient environments of grasses. Understanding the nature of coexistence between trees and grass, which under other circumstances are mutually exclusive or unequal partners, yields theoretical insights and has practical implications.enCompetitionFacilitationHerbivoryStabilityFireArticleScholes, R., & Archer, S. (1997). Tree-grass interactions in savannas. http://hdl.handle.net/10204/771Scholes, RJ, and SR Archer "Tree-grass interactions in savannas." (1997) http://hdl.handle.net/10204/771Scholes R, Archer S. Tree-grass interactions in savannas. 1997; http://hdl.handle.net/10204/771.TY - Article AU - Scholes, RJ AU - Archer, SR AB - Savannas occur where trees and grasses interact to create a biome that is neither grassland nor forest. Woody and gramineous plants interact by many mechanisms, some negative (competition) and some positive (facilitation). The strength and sign of the interaction Varies in both time and space, allowing a rich array of possible outcomes but no universal predictive model. Simple models of coexistence of trees and grasses, based on separation in rooting depth, are theoretically and experimentally inadequate. Explanation of the widely observed increase in tree biomass following introduction of commercial ranching into savannas requires inclusion of interactions among browsers, grazers, and fires, and their effects on tree recruitment. Prediction of the consequences of manipulating tree biomass through clearing further requires an understanding of how trees modify light, water, and nutrient environments of grasses. Understanding the nature of coexistence between trees and grass, which under other circumstances are mutually exclusive or unequal partners, yields theoretical insights and has practical implications. DA - 1997 DB - ResearchSpace DP - CSIR KW - Competition KW - Facilitation KW - Herbivory KW - Stability KW - Fire LK - https://researchspace.csir.co.za PY - 1997 SM - 0066-4162 T1 - Tree-grass interactions in savannas TI - Tree-grass interactions in savannas UR - http://hdl.handle.net/10204/771 ER -