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Environ Pollut

Title:		Associations between environmental pollutants and larval amphibians in wetlands contaminated by energy-related brines are potentially mediated by feeding traits
Author(s):		Smalling KL; Anderson CW; Honeycutt RK; Cozzarelli IM; Preston T; Hossack BR;
Address:		"U.S. Geological Survey, New Jersey Water Science Center, 3450 Princeton Pike, Suite 110, Lawrenceville, NJ, 08648, USA. Electronic address: ksmall@usgs.gov. U.S. Geological Survey, Oregon Water Science Center, 2130 SW 5th Ave, Portland, OR, 97215, USA. U.S. Geological Survey, Northern Rocky Mountain Science Center, 800 E. Beckwith Ave., Missoula, MT, 59801, USA. U.S. Geological Survey, Earth System Processes Division of Water Mission Area, 12201 Sunrise Valley Dr., Reston, VA, 20192, USA. U.S. Geological Survey, Northern Rocky Mountain Science Center, 2327 University Way, Suite 2, Bozeman, MT, 59715, USA"
Journal Title:		Environ Pollut
Year:		2019
Volume:		20190214
Issue:
Page Number:		260 - 268
DOI:		10.1016/j.envpol.2019.02.033
ISSN/ISBN:		1873-6424 (Electronic) 0269-7491 (Linking)
Abstract:		"Energy production in the Williston Basin, located in the Prairie Pothole Region of central North America, has increased rapidly over the last several decades. Advances in recycling and disposal practices of saline wastewaters (brines) co-produced during energy production have reduced ecological risks, but spills still occur often and legacy practices of releasing brines into the environment caused persistent salinization in many areas. Aside from sodium and chloride, these brines contain elevated concentrations of metals and metalloids (lead, selenium, strontium, antimony and vanadium), ammonium, volatile organic compounds, hydrocarbons, and radionuclides. Amphibians are especially sensitive to chloride and some metals, increasing potential effects in wetlands contaminated by brines. We collected bed sediment and larval amphibians (Ambystoma mavortium, Lithobates pipiens and Pseudacris maculata) from wetlands in Montana and North Dakota representing a range of brine contamination history and severity to determine if contamination was associated with metal concentrations in sediments and if metal accumulation in tissues varied by species. In wetland sediments, brine contamination was positively associated with the concentrations of sodium and strontium, both known to occur in oil and gas wastewater, but negatively correlated with mercury. In amphibian tissues, selenium and vanadium were associated with brine contamination. Metal tissue concentrations were higher in tadpoles that graze compared to predatory salamanders; this suggests frequent contact with the sediments could lead to greater ingestion of metal-laden materials. Although many of these metals may not be directly linked with energy development, the potential additive or synergistic effects of exposure along with elevated chloride from brines could have important consequences for aquatic organisms. To effectively manage amphibian populations in wetlands contaminated by saline wastewaters we need a better understanding of how life history traits, species-specific susceptibilities and the physical-chemical properties of metals co-occurring in wetland sediments interact with other stressors like chloride and wetland drying"
Keywords:		"Ambystoma Animals Anura/*physiology *Environmental Monitoring Geologic Sediments Larva/drug effects Metals/toxicity North America Salts/*toxicity Wastewater/*toxicity Water Pollutants, Chemical/analysis/*toxicity *Wetlands Amphibian Brines Energy developm;"
Notes:		"MedlineSmalling, Kelly L Anderson, Chauncey W Honeycutt, R Ken Cozzarelli, Isabelle M Preston, Todd Hossack, Blake R eng England 2019/02/25 Environ Pollut. 2019 May; 248:260-268. doi: 10.1016/j.envpol.2019.02.033. Epub 2019 Feb 14"