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The Mekong River - survival for millions The Mekong River - survival for millions
The Mekong River - survival for millions Following the course of the Mekong River helps to understand the human/river hydrological interdependence. From its source on the Tibetan Plateau it drops 5,000 metres and flows across six countries before reaching its delta. More than a third of the population of Cambodia, Lao PDR, Thailand and Vietnam - some 60 million people - live in the Lower Mekong Basin, using the river for drinking water, food, ir...
26 Jan 2009 - by Philippe Rekacewicz
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Coastal populations and shoreline degradation Coastal populations and shoreline degradation
Unsurprisingly, the coastal areas with the greatest population densities are also those with the most shoreline degradation. The areas surrounding the Black Sea, the Mediterranean and southern Asia have the highest proportion of altered land, while the coastal zones of the Arctic, northeast Pacific, south Pacific, West and Central Africa, East Africa, the Red Sea/Gulf of Aden, and Kuwait have the highest proportions of least modified land. In o...
01 Oct 2009 - by Phillippe Rekacewicz, February 2006
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Impact of sea level rise in Bangladesh Impact of sea level rise in Bangladesh
Impact of sea level rise in Bangladesh. three maps in a time relapse resulting in 18 million people affected, 22,000 km2 of land submerged by flooding.
26 Jan 2009 - by Phillipe Rekacewicz, February 2008
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Impact of sea level rise on the Nile delta Impact of sea level rise on the Nile delta
Impact of sea level rise on the Nile delta. Sea level elevation model used to produce impact of nile delta sea level rise.
26 Jan 2009 - by Phillipe Rekacewicz, Otto Simonett - February 2008
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Global sea-level rise Global sea-level rise
According to the 2007 IPCC report, global average sea level rise will vary from 18 cm to 59 cm by 2100. The IPCC models did not account for the accelerated melting of ice sheets in Greenland and Antarctica. Some of the latest research, however, estimates a global sea level rise of between 0.6 and 1.2 metres by 2100.
01 Oct 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Mean annual coastal erosion in arctic Alaska (Beaufort Sea shoreline) Mean annual coastal erosion in arctic Alaska (Beaufort Sea shoreline)
In the Arctic, impacts of climate change will include increased coastal erosion. For Arctic human communities impacts are projected to be mixed, with detrimental impacts expected on infrastructure and traditional indigenous ways of life in these regions. Food security for some subsistence systems will be threatened through changes in natural ecosystems.
03 Feb 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Arctic ice cover extent Arctic ice cover extent
The greatest reduction in Arctic summer sea ice extent since satellite observations began occurred in 2007, with the following two years experiencing the second and third biggest reductions. The Greenland ice sheet is currently losing more than 250 cubic km a year – faster than can be explained by natural melting.
03 Feb 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Pressures on the South African coast Pressures on the South African coast
Population growth puts pressure on coastal ecosystems. Increased population means growing demand for land for housing and infrastructure, increased use of living resources for food, and more use of available freshwater resources. The negative environmental impacts of the shipping industry also harm the coastal ecosystem. Impacts from shipping include oil spills and the discharge of ballast water and waste into the sea, which affect the quality of...
21 Jun 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Tourism Tourism
Sumatran orangutan habitat offers excellent opportunities for tourism, including direct viewing of orangutans and other diverse wildlife, jungle treks and caving, rafting and bathing in rivers and hot springs, and even unspoilt sandy beaches where the forest meets the sea.
13 Sep 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Water catchments Water catchments
Orangutan habitat overlaps the catchments of 44 major rivers in Sumatra, each of which reaches the coast and discharges into the sea. Thus it is very important to guarantee proper functioning of ecosystem services related to water.
13 Sep 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Elevation Elevation
The Bukit Barisan mountain range that runs down the full length of Sumatra reach altitudes of over 3,000 meters above sea level (m asl), with the highest peaks being Gunung Kerinci in West Sumatra (3,800 m asl) and Gunung Leuser (3,404 m asl) in Aceh. Sumatran orangutan habitat is primarily in lowland areas. The highest densities are found below 500 m asl, but individuals can still be encountered on occasion as high as 2,000 m asl.
13 Sep 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Global flyways of the six subspecies of Red Knot Global flyways of the six subspecies of Red Knot
The Red Knot is a migratory shorebird that travels up to 20,000 km twice a year from its breeding grounds on the high Arctic tundra to its southern non-breeding sites. Along with having one of the longest total migrations of any bird, some populations also fly as much as 8,000–9,000 km between stopover sites in a single flight. As a shellfish-eating specialist avoiding pathogen-rich freshwater habitats, the Red Knot relies on the few large ti...
15 Nov 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Red Knot migration along the East Atlantic flyway Red Knot migration along the East Atlantic flyway
Red Knots set off in April with large fat reserves (fuel) from the airport “West Coast National Park” (the Langebaan Lagoon tidal flats in South Africa) to fly 7,000–8,000 km until they reach the tidal flats of Guinea Bissau, the airport “Banc d’Arguin National Park” in Mauritania or another appropriate refuelling site. They recover the resources they lost and intensively feed for three weeks on protein-rich shellfish allowing them to almost do...
15 Nov 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Leatherback Turtle migration in the Pacific Leatherback Turtle migration in the Pacific
The Leatherback Turtle is a long-distance migratory sea turtle, travelling between tropical breeding grounds and multiple pelagic and coastal foraging regions located in temperate and tropical waters. There are effectively two breeding stocks in the Pacific: a western Pacific stock that nests in Indonesia (Papua Barat), Papua New Guinea, Solomon Islands, and Vanuatu; and an eastern Pacific stock that nests in Mexico, Costa Rica, and Nicar...
15 Nov 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Yellow Sea, the flyway hub Yellow Sea, the flyway hub
The East Asian-Australasian flyway for migratory birds
15 Nov 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Nathusius’ Pipistrelle distribution and migration Nathusius’ Pipistrelle distribution and migration
The tiny Nathusius’ Pipistrelle, weighing only 6–10 grams, travels almost 2000 km from its breeding grounds in north-eastern Europe to its main hibernation areas in south-west Europe. Populations in Russia are thought to winter in the eastern Caucasus and the Volga Delta. Recently, the breeding range of Nathusius’ Pipistrelle has expanded towards the west and the south. New nursery colonies have been found in Ireland, the Netherlands, France, and...
15 Nov 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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