Abstract for C02

Shrub & Herb Vegetation
Arbustaies et végétation herbacée

Shrubs and herbs with broadly mesomorphic (including scleromorphic) growth forms (including broad-leaved, needle-leaved, and sclerophyllous shrubs, some types of rosette shrubs, and forb and graminoid herbs) dominate this type. Vegetation structure is typically moderately open to closed canopy, with irregular horizontal canopy spacing and variable height, but typically less than 5 m, and where mesomorphic trees have <10% cover and mesomorphic shrub and herb growth forms have the majority of cover compared to xeromorphic or cryomorphic growth forms. But in tropical upland savanna regions, trees may have up to 40% cover, are <8 m tall, and the vegetation has a substantial graminoid layer. Climates range from tropical humid to (seasonal) dry to boreal and subalpine, with fairly moderate moisture and temperature conditions. Substrate moisture conditions vary from dry to wet. Vegetation includes upland grasslands, shrublands, open tree savannas, wetland emergent marshes, bogs and fens.

Source: Faber-Langendoen, D., T. Keeler-Wolf, D. Meidinger, C. Josse, A. Weakley, D. Tart, G. Navarro, B. Hoagland, S. Ponomarenko, J.-P. Saucier, G. Fults, E. Helmer. 2014. Classification and description of world formation types. Part I (Introduction) and Part II (Description of world formations). Hierarchy Revisions Working Group, Federal Geographic Data Committee, FGDC Secretariat, U.S. Geological Survey. Reston, VA, and NatureServe, Arlington, VA.

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