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Air pollution
1998
Wark, Kenneth | Warner, Cecil Francis | Davis, Wayne T.
Agricultural pesticide residues in oysters and water from two Chesapeake Bay tributaries Full text
1998
Lehotay, S.J. | Harman-Fetcho, J.A. | McConnell, L.L.
Little is known of the impact of agricultural activity on oysters in Chesapeake Bay tributaries. As a preliminary assessment of pesticide residues in oyster tissues, this study monitored more than 60 pesticides in oysters and overlying water in two tributaries of the Chesapeake Bay. Paired water and oyster samples were collected throughout 1997 from the Patuxent and Choptank Rivers which discharge into opposite shores of the Chesapeake Bay in Maryland. In water, herbicides such as atrazine, simazine, cyanazine, and metolachlor were present throughout the year with individual water concentrations peaking as high as 430 ng/1 in the late spring and summer and subsiding in the fall. These herbicides were not detected in the oysters even when concentrations were highest in the water. Another herbicide, trifluralin, was detected throughout the year at concentrations of less than 0.6 ng/1 and 0.4 ng/g (wet weight) in water and oyster samples, respectively. Several insecticides, such as endosulfans I and II, endosulfan sulfate, chlorpyrifos, α- and γ-HCH, p,p'-DDE, o,p'-DDT, trans-nonachlor, and trans-chlordane were also measured in both oysters and water at low concentrations.
Show more [+] Less [-]Agricultural nutrient balances as agri-environmental indicators: an OECD perspective
1998
Parris, K. (Directorate for Food, Agriculture and Fisheries, OECD, Paris (France))
Dispersion, deposition and impacts of atmospheric ammonia: quantifying local budgets and spatial variability
1998
Sutton, M.A. | Milford, C. | Dragosits, U. | Place, C.J. | Singles, R.J. | Smith, R.I. | Pitcairn, C.E.R. | Fowler, D. | Hill, J. | ApSimon, H.M. | Ross, C. | Hill, R. | Jarvis, S.C. | Pain, B.F. | Phillips, V.C. | Harrison, R. | Moss, D. | Webb, J. | Espenhahn, S.E. | Lee, D.S. | Hornung, M. | Ullyett, J. | Bull, K.R.
Comparison of emissions of nitrogen and sulfur oxides to deposition of nitrate and sulfate in the USA by state in 1990
1998
Furiness, C. | Smith, L. | Ran, L. | Cowling, E. (North Carolina State University, College of Forest Resources, Raleigh, NC (USA))
Changes in tree ring chemistry in sugar maple (Acer saccharum) along an urban-rural gradient in southern Ontario
1998
Watmough, S.A. | Hutchinson, T.C. | Sager, E.P.S. (Environmental Resource Studies Program, Trent University, Peterborough, Ontario, K9J 7B8 (Canada))
Imposex in the commercial snail Bolinus brandaris in the northwestern Mediterranean
1998
Sole, M. | Morcillo, Y. | Porte, C. (Environmental Chemistry Department, CID-CSIC, Jordi Girona, 18-26, 08034 Barcelona (Spain))
Germination and seedling development of switchgrass and smooth bromegrass exposed to 2,4,6-trinitrotoluene
1998
Peterson, M.M. | Horst, G.L. | Shea, P.J. | Comfort, S.D. (Horticulture Department, University of Nebraska-Lincoln, Lincoln, NE 68583-0724 (USA))
Temporal trends of organochlorines in northern Europe, 1967-1995. Relation to global fractionation, leakage from sediments and international measures
1998
Bignert, A. | Olsson, M. | Persson, W. | Jensen, S. | Zakrisson, S. | Litzen, K. | Eriksson, U. | Haggberg, L. | Alsberg, T. (Contaminant Research Group, Swedish Museum of Natural History Box 50007, SE-104 05 Stockholm (Sweden))
Further studies of the air-pasture transfer of polychlorinated biphenyls
1998
Thomas, G.O. | Smith, K.E.C. | Sweetman, A.J. | Jones, K.C. (Environmental Science Department, Institute of Environmental and Natural Sciences, Lancaster University, Lancaster LA1 4YQ (United Kingdom))
