Biogeography and Dynamics of Global Tropical and Subtropical Savannas: A Spatiotemporal View
2010
The global savanna biome is a complex entity. Savannas occupy the continuum between forest and grassland steppe with a variable mixture of trees
and grassland. A range of definitions is provided by Mistry (2000), some of
which are climatic and some of which are based on vegetation. In our opinion, the best definition is provided by Dansereau (1957): “a mixed physiognomy of grasses and woody plants in any geographical area.” However, this
mixture may encompass a very wide set of ecosystems: McPherson (1997)
considers that savannas of various types covered much of North America,
including many systems in which the woody plants are shrubs and grass
cover is extremely sparse. Most of temperate and tropical Australia was originally covered in savanna (Moore, 1975a; Harrington et al., 1984a). At theCONTENTSIntroduction 3
Concept and Assumptions 5
Spatial Definition of Global Savannas: Ecoregions and Land Cover 8
Vegetation and Biodiversity 14
Climate and Soils of Global Savannas 19
Fire 24
Rural Population, Livestock, and Human Appropriation ofNet Primary Productivity 25
Temporal Dynamics 30
Conclusions 32
Acknowledgments 33
References 33
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References
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Citations
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