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Tag: Nutrient

Sources of emissions of nutrients in the Mediterranean region, 2008
Nutrients in seawater present a paradox. Nutrients are, of course, essential for life. In the oligotrophic environment of the Mediterranean, the ecosystems with the most nutrients are generally the most productive and d...
19 Nov 2013 - by GRID-Arendal
Dead zones and fertilizers
The production and use of reactive nitrogen based artificial fertilizers has had huge global benefits providing food for billions through the green revolution. The down side of the increased availability of cheap manufac...
16 Oct 2013 - by GRID-Arendal
Production of nitrogen
The rapid increase in the production of reactive nitrogen via the Haber-Bosch process correlates closely with the increase in world population from about 2.6 billion in 1950 to over 6 billion in 2000 (figure page 78). B...
16 Oct 2013 - by GRID-Arendal
Contrast between contemporary and pre-disturbance transports of total nitrogen through inland aquatic systems resulting from anthropogenic acceleration of this nutrient cycle
While the peculiarities of individual pollutants, rivers, and governance define the specific character of water pollution, the general patterns observed for nitrogen are representative of anthropogenic changes to the tra...
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Contrast between contemporary and pre-disturbance transports of total nitrogen through inland aquatic systems resulting from anthropogenic acceleration of this nutrient cycle
While the peculiarities of individual pollutants, rivers, and governance define the specific character of water pollution, the general patterns observed for nitrogen are representative of anthropogenic changes to the tra...
30 Nov 2007 - by Philippe Rekacewicz, Emmanuelle Bournay, UNEP/GRID-Arendal
Global soil degradation
In many parts of the world natural resources have been treated as though unlimited, and totally resilient to human exploitation. This perception has exacerbated the conflicting agricultural demands on natural capital, as...
03 Jan 2008 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Global soil degradation
In many parts of the world natural resources have been treated as though unlimited, and totally resilient to human exploitation. This perception has exacerbated the conflicting agricultural demands on natural capital, as...
03 Jan 2008 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Arable land in the Baltic Sea region
Ratio of arable land out of total land use in the Baltic Sea drainage basin. Agriculture is one of the main contributors to the nutrient (in this case, primarily nitrogen) influx into the Baltic Sea, and thus a main driv...
04 Oct 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Arable land in the Baltic Sea region
Ratio of arable land out of total land use in the Baltic Sea drainage basin. Agriculture is one of the main contributors to the nutrient (in this case, primarily nitrogen) influx into the Baltic Sea, and thus a main driv...
04 Oct 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Pasture Land - Baltic Sea drainage basin
Ratio of pasture land total land use in the Baltic Sea drainage basin. Agriculture is one of the main contributors to the nutrient (in this case, primarily nitrogen) influx into the Baltic Sea, and thus a main driver for...
04 Oct 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Pasture Land - Baltic Sea drainage basin
Ratio of pasture land total land use in the Baltic Sea drainage basin. Agriculture is one of the main contributors to the nutrient (in this case, primarily nitrogen) influx into the Baltic Sea, and thus a main driver for...
04 Oct 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Mean nutrient concentration in the coast of Romania
Illustration in a set of graphics prepared for a pilot assessment report on the Black Sea drainage basin, for the UNEP Global Impact on Waters Assessment (GIWA). All data and information were prepared in close collaborat...
10 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Mean nutrient concentration in the coast of Romania
Illustration in a set of graphics prepared for a pilot assessment report on the Black Sea drainage basin, for the UNEP Global Impact on Waters Assessment (GIWA). All data and information were prepared in close collaborat...
10 Mar 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Sites with dead zones (oxygen depletion on the sea bottom)
Dead zones (hypoxic i.e. oxygen deficient water) in the coastal zones are increasing, typically surrounding major industrial and agricultural centers. This is commonly occuring due to nutrient pollution, in the form of n...
01 Feb 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Sites with dead zones (oxygen depletion on the sea bottom)
Dead zones (hypoxic i.e. oxygen deficient water) in the coastal zones are increasing, typically surrounding major industrial and agricultural centers. This is commonly occuring due to nutrient pollution, in the form of n...
01 Feb 2008 - by Hugo Ahlenius, UNEP/GRID-Arendal
Phosphate levels in major basins
A comparison of the major watersheds between the two decades showed that Northern Europe and North America had lower phosphate concentrations, while the Ganges and Brahmaputra watersheds in South Central Asia had higher ...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Phosphate levels in major basins
A comparison of the major watersheds between the two decades showed that Northern Europe and North America had lower phosphate concentrations, while the Ganges and Brahmaputra watersheds in South Central Asia had higher ...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Nitrate in major rivers
Considering the data for all the rivers at the continental level, there has been little change in nitrate (NO3-N) concentrations between the two decades under comparison. Changes in the median value were not statisticall...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
Land cover - Baltic Sea region
The Baltic Sea region is covered in primarily forested land and crop land, in the taiga and temperate forest regions. Agricultural land is a main driver for nutrient inputs to the Baltic Sea, and thus eutorphication, and...
04 Oct 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
Land cover - Baltic Sea region
The Baltic Sea region is covered in primarily forested land and crop land, in the taiga and temperate forest regions. Agricultural land is a main driver for nutrient inputs to the Baltic Sea, and thus eutorphication, and...
04 Oct 2005 - by Hugo Ahlenius, UNEP/GRID-Arendal
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