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Ecohydrology for Ethiopia – regulation of water biota interactions for sustainable water resources and ecosystem services for societies

100%

Zalewski M., Negussie Y. Z., Urbaniak M.

International Journal of Ecohydrology and Hydrobiology

2010

tom 10

nr 2-4

This article introduces the rationale and the brief review of the content of the selected papers from the International Symposium “Ecohydrology for sustainable water ecosystems and society in Ethiopia” held on 18th-21st of November 2009 in Addis Ababa, Ethiopia” organized by the European Regional Centre for Ecohydrology under the auspices of UNESCO and the Ministry of Water and Energy of Ethiopia, financed by Ministry of Foreign Affairs of the Republic of Poland – within the Polish Aid Programme. The major criterion of papers selection, above scientific quality, was the perspective of use of the information and knowledge provided in their content to improve the sustainability of water, ecosystems and society, for further development of the wisdom and competences applying the theory of Ecohydrology – one of the priorities of the International Hydrological Programme of UNESCO – as a framework.

Bioaccumulation of DDT and its metabolites in the Miedzyodrze ecosystem, Poland

80%

Tomza-Marciniak A., Witczak A.

Polish Journal of Environmental Studies

2009

tom 18

nr 3

467-474

The aim of this study was to estimate the degree of DDT and its metabolite bioaccumulation (biotasediment accumulation factor, BSAF and biota-water accumulation factor, BCF) in certain aquatic biota collected from the lower Oder River. The study comprised surface water and sediments, as well as soft tissue of compressed river mussel (Anodonta complanata) and certain organs of roach (Rutilus rutilus) and spinycheek crayfish (Orconectes limosus). Regarding a 30-year-old ban on DDT use in Poland, relatively low concentrations of the compound were expected. DDT and its metabolites were detected in all the examined samples. ΣDDT levels in water and sediments averaged 0.157 ± 0.068 µg/dm³ and 11.478 ± 2.292 µg/kg d.w., respectively. Roach organs contained higher levels of these compounds than crayfish and bivalves. DDT was accumulated mainly in the liver and gonads (45.823 ± 9.845 and 19.815 ± 4.854 µg ΣDDT/kg w.w., respectively). In roach organs p,p’ DDE predominated. BSAF values for p,p’ DDE and p,p’ DDD in the liver and p,p’ DDE in the gonads exceeded the predicted theoretical value (2.4). In water and sediment samples from several sites, the DDT/DDE ratio was higher than 1, which indicated fresh input of DDT in the studied area or inhibition of its breakdown.

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Concentrations and profiles of brominated diphenyl ethers (BDEs) in Baltic and Atlantic herring

80%

Roots O., Zitko V., Kiviranta H., Rantakokko P., Ruokojarvi P.

Oceanologia

2009

tom 51

nr 4

The total concentrations of BDEs in Baltic herring, caught in different years (2002–08) from various areas of the Baltic, and in Atlantic herring (2006) can be reasonably well described by a single concentration vs weight relationship. Samples collected a few years earlier and analysed by others show a slightly different relationship. This indicates that the weight of the fish is an important factor determining the level of contamination and that the contamination apparently did not increase between 1999 and 2008. However, two Baltic herring samples collected in 2007 contained, for reasons unknown, very high concentrations of BDE 209. The BDE profiles (concentrations scaled to a sum of 100) varied a great deal. It is impossible to determine how much of this variation is real and how much is caused by errors in the analyses. The concentration of the BDE 75 was much higher in the Atlantic than in the Baltic herring. Even after taking this into consideration, however, the BDE profile in Atlantic herring is different from the BDE profiles in Baltic herring.

Ograniczanie wyników

1 International Journal of Ecohydrology and Hydrobiology

1 Oceanologia

1 Polish Journal of Environmental Studies

1 Kiviranta H.

1 Negussie Y. Z.

1 Rantakokko P.

1 Roots O.

1 Ruokojarvi P.

1 Tomza-Marciniak A.

1 Urbaniak M.

1 Witczak A.

1 Zalewski M.

1 Zitko V.

1 2010

2 2009

Wyniki wyszukiwania

Ecohydrology for Ethiopia – regulation of water biota interactions for sustainable water resources and ecosystem services for societies

Bioaccumulation of DDT and its metabolites in the Miedzyodrze ecosystem, Poland

Concentrations and profiles of brominated diphenyl ethers (BDEs) in Baltic and Atlantic herring