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Vegetation density/distribution in the high Arctic Vegetation density/distribution in the high Arctic
The current vegetation density and distribution in the high Arctic can be calculated using satellite images. The vegetation index, 'greenness' (NDVI) represents a benchmark of the presence and ratio of photosynthesis. In monitoring the vegetation, scientists can keep an eye on the situation and use the index as an indicator of climate change - increased temperatures would enable the forest and tundra to move further north.
31 Jul 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Temperate forests Temperate forests
Temperate forests are active carbon sinks and deforestation in the temperate zone has largely stopped. Where demand for land and/or water allows, reforestation would enable carbon sequestration and could provide other benefits including higher biodiversity and recreation opportunities.
06 Nov 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Boreal forest Boreal forest
The boreal forest biome holds the second largest stock of carbon; most of this is stored in the soil and litter. The draining of boreal forest peatlands, inappropriate forestry practices and poor fire management may all cause significant losses of the carbon stored in this ecosystem.
27 May 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Temperate Forests Temperate Forests
Temperate forests are active carbon sinks and deforestation in the temperate zone has largely stopped. Where demand for land and/or water allows, reforestation would enable carbon sequestration and could provide other benefits including higher biodiversity and recreation opportunities.
13 Sep 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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The vicious cycle of depletion The vicious cycle of depletion
Agricultural systems in the temperate zone tend to occupy fertile soils that would have formerly supported temperate grassland or forest. Land clearance for croplands and pasture has greatly reduced above ground carbon stocks from their original state and soil carbon stocks are also often depleted as tillage disrupts the soil, opening it to decomposer organisms and generating aerobic conditions that stimulate respiration and release of carb...
27 May 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Tropical forests Tropical forests
Tropical forests hold the largest terrestrial carbon store and are active carbon sinks. Reducing emissions from deforestation and degradation is a vital component of tackling dangerous climate change. In addition, tackling illegal and ill-managed logging will be an important part of reducing emissions from forestry.
06 Nov 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Logging in the Congo river basin forest Logging in the Congo river basin forest
China is the largest consumer of logs from the DRC, buying near 38% of the roundwood produced in official statistics in 2008 (Ministère des Eaux, Forêts, Chasses et Pêches du DRC, 2009). However, the official numbers only reflect approximately half of what is being cut, the remaining illegally, often transported across borders to neighboring countries.
17 Mar 2010 - by Riccardo Pravettoni
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Mining the forest Mining the forest
Mining and deforestation.
01 Mar 2010 - by Riccardo Pravettoni
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Distribution and trends of wild Rangifer in the Arctic Distribution and trends of wild Rangifer in the Arctic
Distribution and observed trends of wild Rangifer populations throughout the circumpolar Arctic (from The Circum Arctic Rangifer Monitoring and Assessment Network, CARMA). Note: Wild boreal forest reindeer have not been mapped by CARMA and thus are not represented here. Currently wild reindeer and caribou have declined by about 33% since populations (herds) peaked in the 1990s and early 2000s (3.8 million compared to 5.6 million) which followed ...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
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Trends in Arctic vegetation productivity 1982-2005 (Greening of the Arctic) Trends in Arctic vegetation productivity 1982-2005 (Greening of the Arctic)
Arctic vegetation has undergone enormous change in the past, most notably in response to the glacial and interglacial periods of the Quaternary. Data from many sources and at several scales suggest that recent climate change is already affecting terrestrial Arctic ecosystems. Comparisons of historical and contemporary aerial photographs provide evidence that Arctic vegetation has already undergone significant shifts in recent decades, foreshadowi...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
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Arctic genetic trends - lemming in Arctic Russia Arctic genetic trends - lemming in Arctic Russia
Nucleotide diversity estimates based on the complete sequences of mitochondrial genome in the collared lemming indicate how past climate has structured the genetic component of biodiversity. Lower diversity in regions (green) affected by the northward forest expansion during the Holocene warm climatic events compared to Western Beringia, where there was no forest expansion, suggests a reduction of effective size due to regional range contracti...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
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Distribution and trends of wild Rangifer in the Arctic Distribution and trends of wild Rangifer in the Arctic
Distribution and observed trends of wild Rangifer populations throughout the circumpolar Arctic (from The Circum Arctic Rangifer Monitoring and Assessment Network, CARMA). Note: Wild boreal forest reindeer have not been mapped by CARMA and thus are not represented here. Currently wild reindeer and caribou have declined by about 33% since populations (herds) peaked in the 1990s and early 2000s (3.8 million compared to 5.6 million) which followed ...
01 May 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Distribution of lodgepole pine in Sweden Distribution of lodgepole pine in Sweden
Forest distribution in Scandinavia is affected by several different species. This is to demonstrate the concentration of lodgepole pine (pinus contorta) in Sweden. The lodgepole pine is a tall, slender tree with a narrow loose crown reaching up to 80 feet tall.
21 May 2010 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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World map of forest distribution (Natural resources - forests) World map of forest distribution (Natural resources - forests)
Approximately 240 million of the world's poor that live in forested areas of developing countries depend on forests for their livelihoods. Forest and its products provide cash income, jobs, and consumption goods for poor families. Forestry provides formal and informal employment for an estimated 40-60 million people. The sector contributes in some developing countries more than eight per cent to GDP. Timber may be the most important forest produc...
06 Nov 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Orangutan distribution on Borneo (Indonesia, Malaysia) Orangutan distribution on Borneo (Indonesia, Malaysia)
The distribution of Orangutan on Borneo is rapidly decreasing, as mankind is reducing the available habitat for the apes. The loss of forest, through logging, clearing and burning, means reduced opportunities for hiding and food collection. In addition, orangutans are hunted for food and to be held in captivity.
21 May 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Wild caribou (rangifer) herds and areas of reindeer husbandry Wild caribou (rangifer) herds and areas of reindeer husbandry
Distribution and observed trends of wild Rangifer populations throughout the circumpolar Arctic (from The Circum Arctic Rangifer Monitoring and Assessment Network, CARMA). Currently wild reindeer and caribou have declined by about 33% since populations (herds) peaked in the 1990s and early 2000s (3.8 million compared to 5.6 million) which followed almost universal increases in the 1970s and 1980s. In Arctic Eurasia reindeer herding represents a l...
01 Oct 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Deteriorated forest hotspots Deteriorated forest hotspots
Despite showing signs of slowing at the global level, the present pace of deforestation continues to be a source of serious concern for Latin America and the Caribbean. While the region’s forests represent one of the most important potential sources for mitigating greenhouse gas emissions, it equally accounted for approximately 70% of the world’s decrease in forests between 2005 and 2010 (FAO 2010). The global forest resource assessment (FRA) con...
22 Nov 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Forest conservation and sustainable management initiatives Forest conservation and sustainable management initiatives
In November 2009, in an attempt to preserve the forests and slow deforestation, the Governments of Guyana and Norway signed a memorandum of understanding for cooperation on issues related to combating climate change, protecting biodiversity and improving sustainable development, with a particular focus on reducing emissions from deforestation and forest degradation in the framework of REDD-plus. Within the region, Panama, the Plurinational State ...
22 Nov 2010 - by Nieves López Izquierdo, Associate Consultant UNEP/GRID-Arendal
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Emissions of the Brazilian Amazon Emissions of the Brazilian Amazon
Brazil has been recognized as the fifth highest emitter of greenhouse gasses in the world, and is also the highest emitter within the Latin American and Caribbean region. This high level of emission is first and foremost due land use changes within the country. In 2005, forest and grassland conversion was responsible for emitting more than one billion of metric tons of CO2 equivalent (MtCO2-e) in the Brazilian Amazon.
22 Nov 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Hydrometeorological events in Latin America and the Caribbean Hydrometeorological events in Latin America and the Caribbean
Latin America and the Caribbean has seen a recent increase in extreme climatic events, and with it a rise in the number of people affected. The number of storms between 2000 and 2009 increased by 12 compared to the period between 1970 and 1979. In this same time period, floods quadrupled. The number of people affected by extreme temperatures, forest fires, droughts, storms and floods grew from 5 million in the 1970s to more than 40 million in the...
22 Nov 2010 - by Nieves López Izquierdo, Associate Consultant UNEP/GRID-Arendal
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