Search results
Results from the WOW.Com Content Network
A population density map of Australia. Most of the continent is very sparsely populated, but only a few areas are truly deserted. Even the driest regions of Australia have indigenous communities within them. In 1984, a previously uncontacted family of Pintupi emerged from the Gibson Desert. [4]
A wetland (aerial view) Wetland conservation is aimed at protecting and preserving areas of land including marshes, swamps, bogs, and fens that are covered by water seasonally or permanently due to a variety of threats from both natural and anthropogenic hazards. Some examples of these hazards include habitat loss, pollution, and invasive species.
Most of the exponential human population growth worldwide is occurring in or close to biodiversity hotspots. [6] This may explain why human population density accounts for 87.9% of the variation in numbers of threatened species across 114 countries, providing indisputable evidence that people play the largest role in decreasing biodiversity. [18]
Wetlands are areas where water covers the soil, or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season ...
The local population is growing at about 3% per year, one of the highest rates in the world, placing growing stress on natural resources. [5] However, the region is still sparsely populated with 6–24 inhabitants per square kilometer. [5] About 90% of the people outside the urban centers live on under $1 per day, and few have access to clean ...
A simplified definition of wetland is "an area of land that is usually saturated with water". [14] More precisely, wetlands are areas where "water covers the soil, or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season". [15]
Wetland habitats contribute to environmental health and biodiversity. [60] Wetlands are a nonrenewable resource on a human timescale and in some environments cannot ever be renewed. [61] Recent studies indicate that global loss of wetlands could be as high as 87% since 1700 AD, with 64% of wetland loss occurring since 1900. [61]
By 2008, 75% of the marshes had been restored, including most of the Central Marshes. However, the wetlands have since shrunk to 58% of their pre-drainage area and are projected to drop below 50% as a result of Turkish and Iranian damming of the Tigris and Euphrates, which the UN reports has reduced the combined volume of the rivers by 60%.