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Tag: Marine pollution

Sources of environmental impact on the Mediterranean Sea Sources of environmental impact on the Mediterranean Sea
The National Center for Ecological Analysis and Synthesis (NCEAS) has undertaken modelling to perform comprehensive spatial analysis and mapping of human pressures throughout the Mediterranean Basin. This work builds on a previous global analysis of cumulative human impacts (Halpern et al. 2008), including additional information to better reflect the specific pressures and ecosystems of the Mediterranean Sea and coasts. A total of 22 spatial da...
19 Nov 2013 - by GRID-Arendal
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Composition of benthic communities Composition of benthic communities
Benthic communities are among the first to disappear under conditions of heavy stress. Benthic organisms play an important ecological role by reworking the sediments, which affects the flux of nutrients across the sediment-water interface. Thus their loss is a liability to the ecosystem as a whole. In undisturbed areas in the eastern Mediterranean, benthic communities have a high diversity of species, consisting of polychaetes (50–65%),molluscs...
19 Nov 2013 - by GRID-Arendal
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Sources of emissions of nutrients in the Mediterranean region, 2008 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 diverse. At the same time, many Mediterranean nearshore areas are threatened by nutrient over-enrichment due to coastal and watershed development. Many developed coastal areas suffer particularly from increased influx of dissolve...
19 Nov 2013 - by GRID-Arendal
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Major types of marine litter in the Mediterranean Major types of marine litter in the Mediterranean
A large proportion of marine litter is plastics (UNEP 2009). The impact of large plastic material on the environment has been widely studied. Effects include entanglement of marine animals in plastic and ingestion of plastic by marine organisms.
19 Nov 2013 - by GRID-Arendal
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Chlorinated pesticides and HCB/PCBs releases by sector, 2008 Chlorinated pesticides and HCB/PCBs releases by sector, 2008
HCB and PCBs are mostly released as unwanted by-products in the cement and metal industry, while chlorinated pesticides are emitted by the organic chemical industry, or by wastewater treatment plants, which may collect pesticides contained in sewage and runoff waters.
19 Nov 2013 - by GRID-Arendal
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Dissolved Inorganic Nitrogen export by rivers for world regions Dissolved Inorganic Nitrogen export by rivers for world regions
The figure shows the amounts of nitrogen exported by rivers per year and provides a forecast for the future.
16 Oct 2013 - by GRID-Arendal
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Oil spills from 1970 to 2010 Oil spills from 1970 to 2010
The most obvious potential source of serious pollution from ships is the discharge of oil (cargoes or bunkers) as a result of ship losses. However, there has been a dramatic reduction in the number of major oil spills over the last four decades, including since the 1992 Rio Earth Summit.
16 Oct 2013 - by GRID-Arendal
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Projected annual CO2 emissions from the shipping sector Projected annual CO2 emissions from the shipping sector
In July 2011, international shipping became the first industrial sector to adopt binding international rules for the adoption of technical measures to reduce CO2 emissions. These technical measures were adopted by IMO as amendments to MARPOL Annex VI which is expected to enter into force in 2013.
16 Oct 2013 - by GRID-Arendal
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Seaborne oil trade and tanker spills Seaborne oil trade and tanker spills
The ultimate goal of the shipping industry and its regulators is zero accidents and zero pollution. Although these goals have not yet been fully achieved, considerable progress has been made, especially in the context of pollution from ships, an achievement all the more impressive when it is considered that the total amount of seaborne trade, measured in tonne-miles, has almost doubled since the Rio Earth Summit in 1992 – from 17.54 billion tonne...
16 Oct 2013 - by GRID-Arendal
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Threats to the World's coral reefs Threats to the World's coral reefs
Major observed threats to the world's coral reefs include tourism, poison fishing, overexploitation, sedimentation, coral harvesting, dynamite fishing and pollution. This graphic explains which activities or conditions are affecting various coral reefs throughout the world. The graphic 'Major Threats to Reefs' shows the percentage of reefs that are threatened by overexploitation, coastal development, inland pollution and marine pollution, and the...
17 May 2005 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Murre colonies and human activities Murre colonies and human activities
The thick-billed murre and common murre have ranges 1,000,000 km2 and number in the millions or tens of millions of breeding pairs. However global populations are declining, although increases have occurred in some regions. These seabirds, together with other species of alcids, face a number of direct and indirect marine and terrestrial threats, which influence their survival and reproductive success. These include transboundary pollutants, by-ca...
13 Oct 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Industrial areas and seasonal zones of oxygen depleted waters Industrial areas and seasonal zones of oxygen depleted waters
This graphic illustrates the strong link between areas with high densities of industrial activity and zones of seasonally oxygen-depleted waters. There is a strong link between areas with high densities of industrial activity and zones of seasonal oxygen-depleted waters. In recent years there has been an increasing focus on treating and reducing municipal and industrial waste, and on reducing nitrogen levels in agricultural runoff. However, less...
26 Jan 2009 - by Phillipe Rekacewicz, (Le Monde diplomatique) February 2008
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