The Paraguay Chaco's western two-thirds belong to the semi-arid tropics with annual precipitations between, vegetation being dry low scrub in the west to higher growth xerophytic ( semi-arid impenetrable thorn ) forest towards the east.

Chaco's economy, like most in the region, is relatively underdeveloped yet has recovered vigorously, since 2002.

Chaco's economy is diversified ; but, its agricultural sector has suffered from recurrent droughts over the past decade.

The fertility of the Chaco's deep sedimentary soils is generally high, except in the westernmost parts, where there are very sandy soils, and some seasonal wetlands in the eastern plain.

In addition, the Chaco's economic potential intrigued the Bolivians.

One Argentine company, whose owner had purchased 15 percent of the immense Chaco region, processed massive quantities of tannin, which were extracted from the bark of the Chaco's ubiquitous quebracho ( break-axe ) hardwood.

The central Chaco's Mennonite colonies are a notable exception.

The central Sahelian zone receives between rainfall and has vegetation ranging from grass / shrub steppe to thorny, open savanna.

Over a large part of the region, however, natural vegetation has yielded to agriculture.

Once this islands were covered with savanna on the plains and arid shrubland on the mountainsides, but over 500 years of human habtitation, since colonisation by the Portuguese in the 15th century, nearly all the original vegetation has been cleared by widespread agriculture including the grazing of goats, sheep and cattle and the planting of imported crop species.

However, most vegetation has now been converted to agriculture and forest fragments are now restricted to areas where cultivation is not possible, such as mountain peaks and steep slopes.

The elimination of these pigs in 1958 has caused most of this vegetation to disappear as millions of crabs ( Gecarcinus planatus ) have returned.

A recent report ( 2006 ) by the NOAA's Southwest Fisheries Science Center in La Jolla, California, indicates that the increased rat presence on Clipperton Island has led to a decline in both crab and bird populations, causing a corresponding increase in both vegetation and coconut palms on the island.

It is commonly found on sites where the ground has been disturbed, such as recently cleared woodland, or where the vegetation has been burnt.

In this clearcut, almost all of the vegetation has been stripped from surface of steep slopes, in an area with very heavy rains.

It may persist in native vegetation that has been grazed.

Borneo is the third largest island in the world and the original vegetation was mostly Borneo lowland rain forests although much of this has been cleared with wildlife retreating to the Borneo montane rain forests inland.

Although most of Jamaica's native vegetation has been stripped in order to make room for cultivation, some areas have been left virtually undisturbed since the time of Columbus.

As in the case of vegetation, considerable loss of wildlife has occurred beginning with the settlement of native peoples in the region millennia ago.

Rugged scenery predominates because river erosion over thousands of years has left a varied, low mountain landscape, densely covered with vegetation, sometimes with considerable variations in height.

Hybridization with the subspecies that evolved southwestwards of its range, S. c. massaicus, has apparently been prevented from occurring on a significant scale by ecological separation, the Somali Ostrich preferring bushland where it browses middle-height vegetation for food while the Masai Ostrich is, like the other subspecies, a grazing bird of the open savanna and miombo habitat.

A belt about in length along the Paraguay River again has a different evergreen vegetation of wetlands and palm tree forests ( Bajo Chaco ).

The Total vegetation density, including trees, shrubs, herbs and seedlings has been estimated to be around 240, 000 individuals per hectare.

Senegal has a number of vegetation zones: sahel, Sahel-Soudan, Sudan_ ( region ), Soudan-Guinea, tropical rainforest, and Guinean mangroves.

The government has attempted to preserve sanctuaries for natural vegetation and animal life, however.

Svalbard has permafrost and tundra, with both low, middle and high Arctic vegetation.

Because it was once part of South America, Trinidad has an assortment of tropical vegetation and wildlife considerably more varied than that of most West Indian islands.

In some locations, semi-cultivating Japanese knotweed for food has been used as a means of controlling knotweed populations that invade sensitive wetland areas and drive out the native vegetation .. Use in Japan as sansai or wild foraged vegetable is discussed below under (# Japan ).

It has been hypothesised that bonobos are able to live a more peaceful lifestyle in part because of an abundance of nutritious vegetation in their natural habitat, allowing them to travel and forage in large parties.

Some treatment of mining tailings has occurred where the vegetation is then incinerated to recover the heavy metals.

Attempts were made in 1871 to eradicate the vegetation, because of concerns over the damage that was being caused to the masonry, but much of it has returned.

In fact outside marsh and riparian zones, most of Nepal's native vegetation is adapted to withstand drought, although less so at higher elevations where cooler temperatures mean less water stress.

In the southwest, the vegetation is adapted to desert conditions.

Primarily, the factor that distinguishes wetlands from other land forms or water bodies is the characteristic vegetation that is adapted to its unique soil conditions: Wetlands consist primarily of hydric soil, which supports aquatic plants.

For example, in the United States, wetlands are defined as " those areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions.

A wetland is a term used to describe areas that are often saturated by enough surface or groundwater to sustain vegetation that is usually adapted to saturated soil conditions, such as cattails, bulrushes, red maples, wild rice, blackberries, cranberries, and peat moss.

Salt marshes are dominated by specially adapted rooted vegetation, primarily salt-tolerant grasses.

Populated areas of the province are largely cleared of natural vegetation and adapted for farming.

Rather, he employed the idea of a climax community -- of the form of vegetation best adapted to some idealized set of environmental conditions -- as a conceptual starting point for describing the vegetation in a given area.

The Western Capercaillie is adapted to its original habitats-old coniferous forests with a rich interior structure and dense ground vegetation of Vaccinium species under a light canopy.

Some species are insectivorous burrowing animals, but others are adapted to moving through dense spinifex or other vegetation.

Where it has been introduced, it changes the chemistry of the soil, and therefore allows other exotics to establish themselves, to the detriment of native vegetation adapted to low nitrogen levels.

This vegetation is adapted to the different altitudes, weathers and kinds of soil of the state.

Much of the vegetation in this cape are low-lying and adapted to saltwater and windy conditions.

Rainforests are divided into different strata, or layers, with vegetation organized into a vertical pattern from the top of the soil to the canopy Each layer is a unique biotic community containing different plants and animals adapted for life in that particular strata.

Understory vegetation is of plants that are well adapted to droughty conditions, as well as the frequent lightning-induced fires typical of the region.

In its natural state, the sertão was covered by a distinctive scrubby caatinga vegetation, consisting generally of low thorny bushes adapted to the extreme climate.

Roads, footpaths, buildings and open space have replaced native vegetation adapted to use up every drop of rain.

On the cliffs of the Cap de Sant Antoni, the vegetation is characterised by plants adapted to growing in the fissures, cracks and sherves of the cliff, and able to withstand contact with salt water.

The moist soils of the hammocks support broadleaf trees and more low vegetation, while the swamp areas only support flora and fauna adapted to year-around wet conditions.

This xericity associated with the salt spray conditions the subsistence of an adapted vegetation.

The remaining teeth were large and adapted for eating tough vegetation.