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Cereal productivity in sub-Saharan Africa under a projected Intergovernamental Panel on Climate Change (IPCC) scenario Cereal productivity in sub-Saharan Africa under a projected Intergovernamental Panel on Climate Change (IPCC) scenario
A majority of the population in sub-Saharan African lives in rural areas, where income and employment depend almost entirely on rain-fed agriculture. This population is today at high risk. Sub-Saharan Africa already has a highly variable and unpredictable climate and is acutely vulnerable to floods and droughts. A third of the people in the region live in drought-prone areas, and floods are a recurrent threat in several countries. With climate ch...
26 Jan 2009 - by Philippe Rekacewicz
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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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Trends in capture fisheries and aquaculture Trends in capture fisheries and aquaculture
The levelling off of the global fisheries catch reflects a growing decline in most major fishing areas. Today, these fishing areas are producing lower yields than in the past, and it is unlikely that substantial increases will ever again be possible (FAO, 2000). Inland and marine aquaculture production grew by about 5% annually during the 1950s and 1960s, by about 8% per year during the 1970s and 1980s, and by some 10% per year during the 1990s ...
26 Jan 2009 - by Philippe Rekacewicz
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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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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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Victims and affected people in Pakistan flood, August 2010 Victims and affected people in Pakistan flood, August 2010
Seasonal fooding can occur along all the major watersheds in the Himalayan region (Figure 11–14). The largest problems occur in food prone areas with high population densities. This includes parts of northeast India, south-central Nepal, central and southern Pakistan, large parts of Bangladesh and lower reaches of the large rivers in China. In India around 40 million people are affected by fooding annually and the damage has been estimated...
15 Feb 2010 - by Riccardo Pravettoni
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Working for the Coast Working for the Coast
Working for the Coast is a programme initiated under the Social Responsibility Programme, which provides jobs and training for unemployed people in coastal communities to create and maintain a cleaner coastal environment. The programme works towards protecting the coastal ecosystems which are essential in providing food and sustenance for the many people living in urban and rural coastal areas.
21 Jun 2011 - 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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Hunting of orangutans Hunting of orangutans
Orangutans are also still regularly killed or captured. This occurs for three main reasons: first, even today some people still hunt orangutans for food, most notably in the non-Muslim parts of North Sumatra. Second, when orangutans enter farms or plantations at the for-est edge, for example to feed on fruit trees or other crops, they are often shot or otherwise killed, and any surviving infant eventually ends up in trade or as someone’s illegal ...
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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