|
|||||
|
|
Post World War II orcharding creates present day DDT-problems in The Sørfjord (Western Norway) - A case study |
|
| Authors: | Anders Ruus Norman W Green Carl Einar Amundsen Jens Skei |
| Institution: | a Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, N-0349 Oslo, Norway b Hardanger Miljøsenter, Alex Stewart Environmental Services AS, N-5750 Odda, Norway c National Institute of Nutrition and Seafood Research, P.O. Box 176 Sentrum, N-5804 Bergen, Norway d Norwegian Institute for Agricultural and Environmental Research (Bioforsk), Fr. A. Dahls vei 20, N-1432 Ås, Norway |
| Abstract: | The Sørfjord has a long history of agriculture and industry, and environmental monitoring has been conducted for decades, comprising analyses of contaminants in mussel, fish and sediments. DDT was used as an insecticide in orchards surrounding the fjord between World War II and 1970. Since the early 1990s, elevated concentrations of DDT were found in mussels and fish. Unexpectedly, DDT-concentrations increased towards present day, despite the discontinuation of use. The highest concentrations in mussels (in 2006) corresponded to about two orders of magnitude higher than background. Analyses of sediment core sections also indicated increased input towards present day. Shifts in climatic parameters, as well as increased amounts of soil dissolved organic carbon following a decline in atmospheric sulphate deposition may have contributed to this phenomenon. We warrant the need for increased knowledge of the effects of alterations in variables acting regionally and globally on the disposition of contaminants in ecosystems. |
| Keywords: | Sø rfjord DDT Blue mussel Fish Environmental monitoring Climate change |
| 本文献已被 ScienceDirect 等数据库收录！ | |