savanna


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Related to savanna: savanna climate

savanna

or

savannah

(both: səvăn`ə), tropical or subtropical grassland lying on the margin of the trade windtrade winds,
movement of air toward the equator, from the NE in the Northern Hemisphere and from the SE in the Southern Hemisphere. The trade winds originate on the equatorial sides of the horse latitudes, which are two belts of high air pressure, one lying between 25° and
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 belts. The climate of a savanna is characterized by a rainy period during the summer when the area is covered by grasses, and by a dry winter when the grasses wither. Savannas near the equatorial belt, e.g., in Nigeria, support clumps of trees. The most extensive savannas—all important pasture lands—are in Africa; others include the llanos and the campos of South America.

Savanna

The term savanna was originally used to describe a tropical grassland with more or less scattered dense tree areas. This vegetation type is very abundant in tropical and subtropical areas, primarily because of climatic factors. The modern definition of savanna includes a variety of physiognomically or environmentally similar vegetation types in tropical and extratropical regions. The physiognomically savannalike extratropical vegetation types (forest tundra, forest steppe, and everglades) differ greatly in environment and species composition.

In the widest sense savanna includes a range of vegetation zones from tropical savannas with vegetation types such as the savanna woodlands to tropical grassland and thornbush. In the extratropical regions it includes the “temperate” and “cold savanna” vegetation types known under such names as taiga, forest tundra, or glades. See Grassland ecosystem, Taiga, Tundra

Savanna

 

a type of tropical and subtropical grassland with individual trees, groups of trees, and shrubbery. The plants are able to withstand long periods of drought. Their stiff leaves are heavily pubescent or reduced to thorns. Gramineous herbs predominate, sometimes growing to a height of 3–5 m. The trees are mostly low and have knotty trunks, thick bark, and, frequently, an umbrella-shaped crown. The trunks of some trees, such as the baobab and Brachychiton, contain large reserves of water.

savanna

[sə′van·ə]
(ecology)
Any of a variety of physiognomically or environmentally similar vegetation types in tropical and extratropical regions; all contain grasses and one or more species of trees of the families Leguminosae, Bombacaceae, Bignoniaceae, or Dilleniaceae.
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Some savanna experts have hypothesized that global climate change should favor woody plants and thus we may see a continued replacement of savanna with forest ecosystems.
At first glance, a savanna appears as an open woodland of scattered trees.
We are excited to have closed our fourth fund and expanded our New York City portfolio with the addition of five tremendous properties," said Nicholas Bienstock, Managing Partner at Savanna.
At one research site, a pasture with deep-rooted grass stored 13 percent more carbon than a neighboring savanna did.
We are pleased to realize this successful investment for our partners," said Andrew Fichte, vice president at Savanna.
Their findings challenge the theory, presented last year, that savanna environments rapidly took hold and expanded in regions throughout the world between 7 million and 5 million years ago.