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Regions with sparse vegetation and a low vegetation index are shown in tan. Based on measurements from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite. Areas where there is no data are gray. [1] Vegetation is an assemblage of plant species and the ground cover they provide. [2]
Barren vegetation describes an area of land where plant growth may be sparse, stunted, and/or contain limited biodiversity. Environmental conditions such as toxic or infertile soil , high winds, coastal salt-spray , and climatic conditions are often key factors in poor plant growth and development.
Alpine vegetation belt, above 2,100 m; sparse vegetation. Indicator plants : Rock Speedwell ( Veronica fruticans ), Potentilla crassinervia , Armeria pusilla , Cerastium thomasii , Phyteuma serratum , Stachys corsica and Helichrysum frigidum .
The other type is the lichen woodland or sparse taiga, with trees that are farther-spaced and lichen groundcover; the latter is common in the northernmost taiga. [32] In the northernmost taiga, the forest cover is not only more sparse, but often stunted in growth form; moreover, ice-pruned , asymmetric black spruce (in North America) are often ...
The lack of vegetation exposes the unprotected surface of the ground to denudation. About one-third of the land surface of the Earth is arid or semi-arid. This includes much of the polar regions, where little precipitation occurs, and which are sometimes called polar deserts or "cold deserts".
There are three regions and associated types of tundra: Arctic, [2] Alpine, [2] and Antarctic. [3] Tundra vegetation is composed of dwarf shrubs, sedges, grasses, mosses, and lichens. Scattered trees grow in some tundra regions. The ecotone (or ecological boundary region) between the tundra and the forest is known as the tree line or timberline
This region mostly lies between 4,500 to 6,000 metres (14,800 to 19,700 ft) and is very cold and arid. The only vegetation is a sparse alpine steppe. Extensive areas consist of bare rock and glaciers. [2] [13] The Trans-Himalayan region with its sparse vegetation has the richest wild sheep and goat community in the world.
Simiyu Region (Mkoa wa Simiyu in ... sparse vegetation and, in some areas, ... efforts have been made to plant trees to improve the amount of vegetation cover ...