Uptake of arsenic and metals by tadpoles at an historically contaminated Texas site
Tóm tắt
On 14 May 1994, tadpoles were collected from Lateral Pond and Municipal Lake in Bryan, Texas. These waters are immediately downstream from Finfeather Lake which was directly contaminated during 53 years of industrial production of arsenic (As)-based cotton defoliants. The tadpoles contained elevated levels of arsenic, chromium (Cr) and zinc (Zn). As far as it is known, the mean concentrations of As (6.87 p.p.m. wet weight) and Cr (6.91 p.p.m. wet weight) in cricket frog (Acris crepitans) tadpoles were the highest ever reported in tadpoles. The Zn in the tadpoles exceeded the levels found in sediments by six to 11 times. The concentrations of As, Cr and Zn in Finfeather Lake in 1994 may have been toxic because tadpoles could not be found there. Ranid tadpoles and a newly transformed ranid frog found dead in Lateral Pond and Municipal Lake in 1994 may indicate that the elements reached toxic levels in some individual amphibians. The concentrations of As, Cr and Zn found in the tadpoles in this study might be toxic to predators. Mortality of turtles showing symptoms linked to chronic exposure to As was reported in Finfeather Lake in 1973. Turtles were not reported in Finfeather Lake again until 1996. Observations at Municipal Lake in 1994–1996 showed abundant tadpoles and turtles but no snakes, which also have not been seen at Finfeather Lake. This absence of snakes may indicate that their sensitivity or exposure to the existing contaminants is greater than that of frogs and turtles.
Tài liệu tham khảo
Altig, R. (1970) A key to the tadpoles of the continental United States and Canada. Herpetologica 26, 180–207.
Baudo, R. (1976) Heavy metals concentrations (Cr, Cu, Mn and Pb) in tadpoles and adults of Rana esculenta L. Mem. Ist. Ital. Idrobiol. 33, 325–44.
Birge, W.J. (1978) Aquatic toxicology of trace elements of coal and fly ash. In J.H. Thorp and J.W. Gibbons (eds) Energy and environmental stress in aquatic systems, pp. 219–40. Augusta, GA: USDOE Technical Information Center.
Brown, K. (1993) Atochem No Stranger to Lawsuits. The Bryan-College Station Eagle: Bryan, Texas.
Camardese, M.B., Hoffman, D.J., LeCaptain, L. and Pendleton, G.W. (1990) Effects of arsenate on growth and physiology in mallard ducklings. Environ. Toxicol. Chem. 9, 785–95.
Cantu, R., Stacell, M. and Webb, M. (1991) Observations of Abnormalities in Largemouth Bass Fry Exposed to Arsenic Contaminated Water. Austin, TX: Texas Parks and Wildlife.
Cearley, J.E. (1973) Arsenic Contamination of Finfeather and Municipal Lakes in the City of Bryan. Austin, TX: Texas Water Quality Board.
Eisler, R. (1986) Chromium hazards to fish, wildlife, and invertebrates: a synoptic review. US Fish Wildl. Serv., Biol. Rep. 85(1.6), 1–60.
Elf Atochem (1994) Semi-annual Report, Volume 4, Facility Data, August 1994. Bryan, TX: Elf Atochem North America, Inc.
Gosner, K.L. (1960) A simplified table for staging anuran embryos and larvae with notes on identification. Herpetologica 16, 183–90.
Hall, R.J. and Mulhern, B.M. (1984) Are anuran amphibians heavy metal accumulators? In R.A. Seigel, L.E. Hunt, J.L. Knight, L. Malaret and N.L. Zuschlag (eds) Vertebrate ecology and systematics — a. tribute to Henry S. Fitch, pp. 123–33. Lawrence, KS: Museum of Natural History, University of Kansas.
Jennett, J.C., Wixson, B.G., Lowsley, I.H., Purushothaman, K., Bolter, E., Hemphill, D.D., Gale, N.L. and Tranter, W.H. (1979) Transport and distribution from mining, milling, and smelting operations in a forest ecosystem. In W.R. Boggess and B.G. Wixson (eds) Lead in the environment, pp. 135–78. Castle House Publications, Ltd: National Science Foundation RANN Program NSF/RA 770214, Washington, D.C.
NAS (1979) Zinc. Baltimore, MD: United States National Academy of Sciences, National Research Council, Subcommittee on Zinc. University Park Press.
Parametrix (1993) Sediment Characterization of Municipal Lake and Burton Creek, Bryan, Texas. Kirkland, WA: Parametrix, Inc.
Parametrix (1994) Biological Assessment and Remedial Investigation of Lakes, Tributaries and Streams in the Finfeather-Bryan Municipal Lake drainage Basin, Bryan, Texas: Phase I Morphometric Mapping and Lake Sediment Coring. Kirkland, WA: Parametrix, Inc.
SAS Institute (1994) JMP Statistics and Graphics Guide. Version 3. Cary, NC: SAS Institute.
Snyder, W.G., Conry, T.M., Watson, J.L. and Bowles, W.F., Jr (1992) Arsenic Contamination and Toxicity: Finfeather and Municipal Lakes, Brazos County. Austin, TX: Texas Water Commission.
Sorensen, E.M., Mitchell, R.R., Pradzynski, A., Bayer, T.L. and Wenz, L.L. (1985) Stereological analyses of hepatocyte changes parallel arsenic accumulation in the livers of green sunfish. J. Environ. Pathol. Toxicol. Oncol. 6, 195–210.
Sparling, D.W. and Lowe, T.P. (1996) Metal concentrations of tadpoles in experimental ponds. Environ. Pollut. 91, 149–59.
Texas Water Commission (1991) Executive Director's Preliminary Report to the Commission. Austin, TX: Texas Water Commission.