22 results found in 3 ms Page 1 of 3
Indicator-based status assessment of commercial fish species in the North Sea according to the EU Marine Strategy Framework Directive (MSFD)
Created: 2017-05-04 11:18:30.918 by: Generation Service
The EU Marine Strategy Framework Directive (MSFD) is structured into eleven descriptors of good environmental status (GES). For each descriptor the current status of the marine environment should be assessed against its GES using ecosystem criteria and indicators. Within Descriptor 3 (D3) the MSFD addresses the status of exploited fish stocks according to three criteria (exploitation rate, stock size and size structure). This study performed an MSFD-compliant assessment of exploited fish stocks in the North Sea by aggregating data from analytical stock assessments and scientific research surveys to calculate indicator metrics for each criterion within each stock time-series. A stock achieved GES, when each indicator for each criterion had a good status. Of 43 assessed fish stock suggested by the EU Data Collection Framework, 63% (27) achieved GES. Though the MSFD explicitly demands that all exploited fish stocks achieve GES, this demand may be challenged by reality, because the status of exploited stocks depends not only on fishing impacts, but also on environmental conditions and ecological interactions. Therefore an alternative approach based on binomial distributions is presented to define limits for GES at the descriptor level. The implications and pitfalls of the applied assessment methods are discussed.
Places: North Sea
Trace metal variability, background levels and pollution status assessment in line with the water framework and Marine Strategy Framework EU Directives in the waters of a heavily impacted Mediterranean Gulf
Created: 2017-05-04 09:27:34.737 by: Generation Service
The aim of this work is to assess trace metal pollution status (Cd, Cu, Ni, Pb, Zn) in the waters of Saronikos Gulf, Greece, in line with the WFD and MSFD European Directives, based on data collected over a decade (2000-2010). Dissolved metal background levels are estimated for the first time for Greek marine waters and the upper limits are: Cd: 0.574 nmol L-1; Cu: 8.26 nmol L-1; Ni: 7.94 nmol L-1; Pb: 2.60 nmol L-1; Zn: 115 nmol L-1. The variability of dissolved and particulate metals reflected the presence of several point sources and revealed the importance of natural mechanisms acting as non-point sources. The status of Saronikos Gulf is classified as 'High' for most metals studied. An exception to this is the enclosed Elefsis Bay where Cu, Ni and Zn concentrations are found above background. Our work will assist the implementation of WFD and MSFD directives in Greece. (C) 2014 Elsevier Ltd. All rights reserved.
Created: 2017-05-04 09:22:03.352 by: Generation Service
There have been numerous anthropogenic-driven changes to our planet in the last half-century. One of the most evident changes is the ubiquity and abundance of litter in the marine environment. The EU Marine Strategy Framework Directive (MSFD, 2008/56/EC) establishes a framework within which EU Member States shall take action to achieve or maintain good environmental status (GES) of their marine waters by 2020. GES is based on 11 qualitative descriptors as listed in Annex I of the MSFD. Descriptor 10 (D 10) concerns marine litter. As a follow-up to the related Commission Decision on criteria and methodological standards (2010/477/EU) in which 56 indicators for the achievement of GES are proposed, the EC Directorate-General for the Environment, on the request of the European Marine Directors, established a Technical Subgroup on Marine Litter (TSG ML) under the Working Group on GES. The role of TSG ML is to support Member States through providing scientific and technical background for the implementation of MSFD requirements with regard to D 10. Started in 2011, TSG ML provides technical recommendations for the implementation of the MSFD requirements for marine litter. It summarizes the available information on monitoring approaches and considers how GES and environmental targets could be defined with the aim of preventing further inputs of litter to, and reducing its total amount in, the marine environment. It also identifies research needs, priorities and strategies in support of the implementation of D 10. The work of TSG ML also focuses on the specification of monitoring methods through the development of monitoring protocols for litter in the different marine compartments, and for microplastics and litter in biota. Further consideration is being given to monitoring strategies in general and associated costs. Other priorities include the identification of sources of marine litter and a better understanding of the harm caused by marine litter.
Reference: Mirlean N.-Mercury pollution sources in sediments of Patos Lagoon Estuary, Southern Brazil
Created: 2018-08-01 14:58:23.682 by: Generation Service
Paper abstract:Present study is an attempt to evaluate the contribution of anthropogenic effluents on mercury pollution in sediments. Comparison of mercury concentrations from different sources indicated that domestic effluent was prevalent. Insufficient control on waste collecting and absence of sewage treatment are considered the principal causes of mercury pollution in estuarine sediments.
Reference: Maanan M.-A long-term record of land use change impacts on sediments in Oualidia lagoon, Morocco
Created: 2018-08-01 15:16:30.782 by: Generation Service
Paper abstract:An integrated approach, involving land use patterns and heavy metal contents of the surficial and cored sediment, was proposed to detect the characteristic spatial and temporal scale of point and non-point source human disturbances on the Oualidia lagoon in Morocco. Land-use types affected lagoon sediment pollution in different ways: 1) agricultural areas had the highest potential for sediment contamination by heavy metals, particularly Pb, Cu and Hg, 2) Ni and Cr are the main pollutants originating from urban sewage and 3) oyster farming and traditional land uses such as salt flats, pastures showed low levels of others metals.
Reference: Kharroubi A.-Assessment of sediment quality in the Mediterranean Sea–Boughrara lagoon exchange areas (southeastern Tunisia): GIS approach-based chemometric methods
Created: 2018-08-01 15:05:24.624 by: Generation Service
Paper abstract:Concentrations of selected heavy metals (Cd, Pb, Zn, Cu, Mn, and Fe) in surface sediments from 66 sites in the Sea–Boughrara lagoon exchange areas were studied in order to understand current metal contamination due to the urbanization and economic development of nearby several coastal regions. Multiple approaches were applied for the sediment quality assessment. These approaches were based on GIS coupled with chemometric methods.
Places: Mediterranean Sea-Boughrara
Reference: Glasby G.P.-Heavy-metal pollution of sediments from Szczecin Lagoon and the Gdansk Basin, Poland
Created: 2018-08-01 14:58:00.569 by: Generation Service
Paper abstract:Concentrations of Al, V, Mn, Fe, Co, Cu, Ni, Zn, Sr, Mo, Cd, Sb, Pb, Th, U, REE, Na, K, Mg, Ca, Si, P, S, Ti, Cr and Ba were determined in the -63 mm fraction of bottom sediments of the Szczecin Lagoon and the Gdansk Basin. The sediments of the Szczecin Lagoon appear to be the most polluted with heavy metals (especially Cd, Zn and Pb) within the Polish Exclusive Economic Zone (EEZ) of the Baltic Sea.
Places: Gdansk Basin
Organizations: Fe, Co
Reference: Basaham A.S. -Distribution and Behaviour of Some Heavy Metals in the Surface Sediments of Al-Arbaeen Lagoon, Jeddah, Red Sea Coast
Created: 2018-08-01 15:03:43.692 by: Generation Service
Paper abstract:The concentrations of Fe, Mn, Zn, Pb, Ni, Cr, Co, Cu and organic carbon are higher in the lagoon sediments than the background levels of these elements measured in remote unpolluted marine sediments This is due to the large input of anthropogenic waste into the lagoon.
Organizations: Cr, Co
Reference: Tas E.C.-Distribution of some heavy metals in surface sediments from the Homa Lagoon (Izmir Bay, Turkey).
Created: 2018-08-01 15:01:42.851 by: Generation Service
Paper abstract:Homa Lagoon is one of the commercially important fishing areas in Izmir Bay (Aegean Sea, Turkey) which is under the influence of heavy metal pollution due to the urbanization, industrial and agricultural activities.The purpose of this study was to determine the levels of some heavy metals such as Cd, Cu, Pb, Zn, Cr, Fe in surface sediment.
Places: Izmir Bay
Reference: Huang L.-Heavy metal pollution status in surface sediments of Swan Lake lagoon and Rongcheng Bay in the northern Yellow Sea
Created: 2018-08-01 15:06:11.802 by: Generation Service
Paper abstract: Surface sediments collected from the largest swan habitat in Asia, the Swan Lake lagoon and the surrounding coastal area in Rongcheng Bay in northern Yellow Sea, were analyzed for the total metal concentrations and chemical phase partitioning of five heavy metals (Cu, Zn, Pb, Cd, and Cr). Metal contents in the studied region have increased significantly in the past decade.
People: Huang L.
Places: Swan Lake
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