caa a22 4500 467902747 CHVBK 20180406152823.0 cr unu---uuuuu 170328e20060701xx s 000 0 eng 10.1007/s10661-006-1499-1 doi (NATIONALLICENCE)springer-10.1007/s10661-006-1499-1 Trace Element Concentrations and Bioindicator Responses in Tree Swallows from Northwestern Minnesota [Elektronische Daten] [Christine Custer, Thomas Custer, David Warburton, David Hoffman, John Bickham, Cole Matson] Extremely high concentrations of cadmium (3.5 μg/g dry wgt.) and elevated concentrations of chromium (>10 μg/g dry wgt.) and mercury (1.6 μg/g dry wgt.) were reported in waterbird tissues at Agassiz National Wildlife Refuge in northwestern Minnesota in 1994. Tree swallows (Tachycineta bicolor) were studied during 1998-2001 at three drainages into the Refuge, two pools on the Refuge, and at a nearby reference location to document whether high levels of contaminants were still present, and if so to quantify the source and severity of the contamination. Trace elements were measured in tree swallow eggs, livers, and diet. Reproductive success and bioindicator responses were monitored. In 2000, water was drawn down on Agassiz Pool, one of the main pools on the Refuge. This presented an opportunity to evaluate the response of trace element concentrations in the diet and tissues of tree swallows after reflooding. High concentrations of trace elements were not detected in swallow tissues, nor were there differences among locations. Less than 20% of swallow samples had detectable concentrations of cadmium or chromium. Mercury concentrations were low and averaged <0.25 μg/g dry wgt. in swallow tissues. Trace elements, including mercury, did not increase in tree swallows following the 2000 drawdown at Agassiz Pool. Hatching success and survival of nestlings to 12 days-of-age for tree swallows on the Refuge were similar to the national average and consistent with background trace element concentrations. Bioindicator measurements were within the normal ranges as well. Springer Science + Business Media, Inc., 2006 Agassiz National Wildlife Refuge nationallicence mercury nationallicence Minnesota nationallicence Tachycineta bicolor nationallicence trace elements nationallicence tree swallows nationallicence Custer Christine U.S. Geological Survey, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, 54603, La Crosse, WI, USA aut Custer Thomas U.S. Geological Survey, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, 54603, La Crosse, WI, USA aut Warburton David U.S. Fish and Wildlife Service, 4101 E. 80th St., 55425, Bloomington, MN, USA aut Hoffman David U.S. Geological Survey, Patuxent Wildlife Research Center, c/o BARC-East, Bldg. 308, 10300 Baltimore Avenue, 20708, Beltsville, MD, USA aut Bickham John Department of Wildlife and Fisheries, Texas A&M University, 77843, College Station, TX, USA aut Matson Cole Department of Wildlife and Fisheries, Texas A&M University, 77843, College Station, TX, USA aut Environmental Monitoring and Assessment Kluwer Academic Publishers 118/1-3(2006-07-01), 247-266 0167-6369 118:1-3<247 2006 118 10661 https://doi.org/10.1007/s10661-006-1499-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-006-1499-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Custer Christine U.S. Geological Survey, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, 54603, La Crosse, WI, USA aut NATIONALLICENCE 700 1- Custer Thomas U.S. Geological Survey, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, 54603, La Crosse, WI, USA aut NATIONALLICENCE 700 1- Warburton David U.S. Fish and Wildlife Service, 4101 E. 80th St., 55425, Bloomington, MN, USA aut NATIONALLICENCE 700 1- Hoffman David U.S. Geological Survey, Patuxent Wildlife Research Center, c/o BARC-East, Bldg. 308, 10300 Baltimore Avenue, 20708, Beltsville, MD, USA aut NATIONALLICENCE 700 1- Bickham John Department of Wildlife and Fisheries, Texas A&M University, 77843, College Station, TX, USA aut NATIONALLICENCE 700 1- Matson Cole Department of Wildlife and Fisheries, Texas A&M University, 77843, College Station, TX, USA aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 118/1-3(2006-07-01), 247-266 0167-6369 118:1-3<247 2006 118 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer