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Tag: Biodiversity

Distribution of polar bear populations in the Arctic Distribution of polar bear populations in the Arctic
Worldwide there are thought to be 22,000-27,000 polar bears (Ursus maritimus)in 20 separate populations. They can be found in the United States, Canada, Russia, Greenland and on the Arctic islands of Norway.
04 Oct 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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How much sea ice will be left in 2050? How much sea ice will be left in 2050?
Climate simulations suggest continued rapid loss of Arctic sea-ice. The observations of indigenous peoples also indicate unprecedented change. The loss of the Arctic sea-ice will have vast impacts on climate, livelihoods and biodiversity.
21 Mar 2006 - by Author: K. Dixon & H. Vahlenkamp, October 1998, December 1999, February 2004; Layout: Petter Sevaldsen (UNEP/GRID-Arendal)
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Defining and measuring biodiversity Defining and measuring biodiversity
No data
28 Mar 2006 - by Bounford.com and UNEP/GRID-Arendal
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Status of terrestrial ecoregions - threats and vulnerabilities Status of terrestrial ecoregions - threats and vulnerabilities
In a World Wildlife Fund for Nature (WWF) study, experts identified 200 periority terrestrial ecoregions - defined as large scale ecological systems with characteristic flora, fauna and climate with high priority for conservation. Furthermore, as presented in this map, the 200 ecoregions were ranked based on their current and future threats and conservation status. From the study - 47% of the terrestrial ecorgions are considered critical or endan...
01 Nov 2006 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Namibia case study locator map, with protected areas network Namibia case study locator map, with protected areas network
Namibia case study locator map, with protected areas network
11 Jul 2006 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Routes for exports of illegally logged ramin timber in Indonesia Routes for exports of illegally logged ramin timber in Indonesia
Ramin, Gonystylus sp., is a group of tropical hardwood species in South East Asia, listed as vulnerable on the IUCN red list, and the trade of the timber is regulated under CITES. Illegal logging of these species is common in Indonesia, even in protected areas. The timber is transported to sawmills in Indonesia and Malaysia and further exported to destinations in Asia, North America, Europe and elsewhere. Final market prices might amount to as hi...
22 Jan 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Extent of deforestation in Borneo 1950-2005, and projection towards 2020 Extent of deforestation in Borneo 1950-2005, and projection towards 2020
The tropical lowland and highland forests of Borneo, including vast expanses of rainforest, have decreased rapidly after the end of the second world war. Forests are burned, logged and clear, and commonly replaced with agricultural land, built-up areas or palm oil plantations. These areas represent habitat for species, such as Orangutan and elephants.
01 Nov 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Tigris and Euphrates rivers fragmentation Tigris and Euphrates rivers fragmentation
It has been predicted that access to water will create conflict between countries. In Africa, central Asia, west Asia and the Americas, some countries are already arguing fiercely over access to rivers and inland seas, and confrontations could arise as water shortages grow (Gleick, 2000). Countries currently or potentially involved in international disputes over access to river water and aquifers include: - Turkey, Syria and Iraq (the Tigris and...
26 Jan 2009 - by Philippe Rekacewicz
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Fish diversity in freshwater systems Fish diversity in freshwater systems
Although freshwater ecosystems such as rivers, lakes and wetlands occupy less than 2% of the earth’s total land surface, they provide a wide range of habitats for a significant proportion of the world’s plant and animal species. Many are yet to be discovered, but the number of freshwater species worldwide is estimated at between 9,000 and 25,000 (Cosgrove and Rijsberman, 2000). However, this number is rapidly decreasing due to human interference....
26 Jan 2009 - by Philippe Rekacewicz
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Coral reefs at risks Coral reefs at risks
There are two distinct regions in which coral reefs are primarily distributed: the Wider Caribbean (Atlantic Ocean) and the Indo-Pacific (from East Africa and the Red Sea to the Central Pacific Ocean). - The diversity of coral is far greater in the Indo-Pacific, particularly around Indonesia, the Philippines, and Papua New Guinea. Many other groups of marine fauna show similar patterns, with a much greater diversity in the Indo-Pacific region. ...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
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Damming the world Damming the world
The construction of large dams - defined as those with walls at least 15 metres high - has increased significantly over the past 50 years. The average height of new dams, estimated at 30-34 m from 1940-1990, increased to about 45 m in the 1990s, due largely to construction trends in Asia. The average area and volume of freshwater reservoirs have also steadily increased, rising to about 50 km2 between 1945 and1970, declining through the 1980s to 1...
26 Jan 2009 - by Phillippe Rekacewicz, February 2006
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Industrial areas and seasonal zones of oxygen depleted waters Industrial areas and seasonal zones of oxygen depleted waters
This graphic illustrates the strong link between areas with high densities of industrial activity and zones of seasonally oxygen-depleted waters. There is a strong link between areas with high densities of industrial activity and zones of seasonal oxygen-depleted waters. In recent years there has been an increasing focus on treating and reducing municipal and industrial waste, and on reducing nitrogen levels in agricultural runoff. However, less...
26 Jan 2009 - by Phillipe Rekacewicz, (Le Monde diplomatique) February 2008
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Marine species diversity Marine species diversity
Limited information is available on species diversity and the condition of coastal and marine ecosystems (Burke et al., 2001). There is growing evidence that many marine species are less widely distributed, and therefore more vulnerable to extinction, than previously thought (GESAMP, 2001a). The protection and sustainable use of marine resources and biodiversity are governed by several international conventions, including the Convention on Biolog...
26 Jan 2009 - by World Resource Institute (WRI), Washington Dc, 1998, based on data from UNEP-WCMC.
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Ecological Footprint and Biodiversity Ecological Footprint and Biodiversity
No data
06 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Economic Worldwide Benefits Coming From Biodiversity Economic Worldwide Benefits Coming From Biodiversity
No data
06 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Species Turnover Species Turnover
Change in the initial species richness in 2005 relative to 2001-2005 average (high-range climate change scenario). Studies predict species invasion will be profound in the Arctic and Southern Oceans. Among others these changes could result in a significant turnover of species of more than 60% of present biodiversity. This has the potential to disrupt a range of marine ecosystem services including food provisioning.
06 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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South Africa biomes South Africa biomes
South Africa is blessed with a rich abundance of biodiversity and a wide range of ecosystems and biomes. Among them are the wetland ecosystems, which occupy approximately seven per cent of South Africa’s total land area. Wetlands are regarded as one of the most productive ecosystems because of all the ecosystem services they provide. But the country’s wetlands are under pressure from both natural and human threats and approximately sixty per cen...
21 Jun 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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National environmental legislation, South Africa National environmental legislation, South Africa
The Working for the Environment programmes (water, fire, wetland, coast) are all supported by important national environmental legislation including the National Environmental Management: Biodiversity Act, the Disaster Management Act, the National Veld and Forest Fire Act, the National Environmental Management: Biodiversity Act, and the National Environment Management: Integrated Coastal Management Act.
21 Jun 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Invasive alien plant species potential distribution Invasive alien plant species potential distribution
Alien plant species pose a major threat to South Africa’s native biodiversity. It is estimated that more than 9 000 plant species have been introduced so far. Of these, about 198 species are deemed invasive, covering 10 per cent of the country. Since the invasive plants grow by an estimated 5 per cent a year, their presence has dramatic effects on both native species and ecosystems as well as economic activities in the area. In particular, alien ...
21 Jun 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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