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Tag: Forest

Forest vs. Agriculture – the case of the Mabira forest reserve, Uganda
The Mabira forest reserve, on the shores of Lake Victoria hosts valuable wildlife, serves as a timber resource, provides ecosystem services for the water balance and the rainforests represents a tourist destination. Foll...
12 May 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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...
12 May 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Reforestation, town of Galma and surroundings, Niger 1975 and 2003
In 1970s and 1980s - years of environmental crisis, there were few trees remaining in Niger. Wind-blown sands razed farmers' young crops and they often had to plant crops three times to succeed. Since the middle of the 1...
01 Oct 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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...
31 Jul 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
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 be...
06 Nov 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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 al...
27 May 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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 ...
13 Sep 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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 carbo...
27 May 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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, tack...
06 Nov 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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 onl...
17 Mar 2010 - by Riccardo Pravettoni
Mining the forest
Mining and deforestation.
01 Mar 2010 - by Riccardo Pravettoni
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 ...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
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 ch...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
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 ...
17 Mar 2010 - by Hugo Ahlenius, GRID-Arendal & CAFF
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 ...
01 May 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
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...
21 May 2010 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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...
06 Nov 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
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 ...
21 May 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
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 decline...
01 Oct 2010 - by Hugo Ahlenius, UNEP/GRID-Arendal
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 mos...
22 Nov 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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