We examined the bioavailability of mercury in sediments from the contaminated Sudbury River (Massachusetts, U.S.A.). Mayfly nymphs (Hexagenia) were exposed in four 21-day bioaccumulation tests to contaminated and reference sediments (treatments) from reservoirs, flowing reaches, palustrine wetlands, and a riverine lake. Mean total mercury (Sigma Hg) ranged from 880 to 22 059 ng.g dry weight(-1) in contaminated sediments and from 90 to 272 ng.g(-1) in reference sediments. Mean final concentrations of methyl mercury (MeHg) in test water were greatest (8-47 ng Hg.L-1) in treatments with contaminated wetland sediments, which had mean Sigma Hg ranging from 1200 to 2562 ng.g(-1). In mayflies, final mean concentrations of MeHg were highest in treatments with contaminated wetland sediments (122-183 ng Hg.g(-1)), intermediate in treatments with contaminated sediments from reservoirs, flowing reaches, and a riverine lake (75-127 ng Hg.g(-1)), and lowest in treatments with reference sediments (32-41 ng Hg.g(-1)). We conclude that the potential entry of MeHg into the benthic food chain was greater in contaminated palustrine wetlands than in the contaminated reservoirs, which had the most contaminated sediments.
机构:
US FISH & WILDLIFE SERV, NATL FISHERIES CONTAMINANT RES CTR, FIELD RES STN, LA CROSSE, WI 54602 USAUS FISH & WILDLIFE SERV, NATL FISHERIES CONTAMINANT RES CTR, FIELD RES STN, LA CROSSE, WI 54602 USA
DUKERSCHEIN, JT
WIENER, JG
论文数: 0引用数: 0
h-index: 0
机构:
US FISH & WILDLIFE SERV, NATL FISHERIES CONTAMINANT RES CTR, FIELD RES STN, LA CROSSE, WI 54602 USAUS FISH & WILDLIFE SERV, NATL FISHERIES CONTAMINANT RES CTR, FIELD RES STN, LA CROSSE, WI 54602 USA
WIENER, JG
RADA, RG
论文数: 0引用数: 0
h-index: 0
机构:
US FISH & WILDLIFE SERV, NATL FISHERIES CONTAMINANT RES CTR, FIELD RES STN, LA CROSSE, WI 54602 USAUS FISH & WILDLIFE SERV, NATL FISHERIES CONTAMINANT RES CTR, FIELD RES STN, LA CROSSE, WI 54602 USA
RADA, RG
STEINGRAEBER, MT
论文数: 0引用数: 0
h-index: 0
机构:
US FISH & WILDLIFE SERV, NATL FISHERIES CONTAMINANT RES CTR, FIELD RES STN, LA CROSSE, WI 54602 USAUS FISH & WILDLIFE SERV, NATL FISHERIES CONTAMINANT RES CTR, FIELD RES STN, LA CROSSE, WI 54602 USA
机构:
Univ Nebraska Lincoln, Peter Kiewit Inst, Dept Civil Engn, Omaha, NE 68182 USAUniv Nebraska Lincoln, Peter Kiewit Inst, Dept Civil Engn, Omaha, NE 68182 USA
Sangster, Jodi L.
Ali, Jonathan M.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Nebraska, Med Ctr, Dept Environm Agr & Occupat Hlth, 986805 Nebraska Med Ctr, Omaha, NE 68198 USAUniv Nebraska Lincoln, Peter Kiewit Inst, Dept Civil Engn, Omaha, NE 68182 USA
Ali, Jonathan M.
Snow, Daniel D.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Nebraska, Nebraska Water Ctr, Lincoln, NE 68583 USA
Univ Nebraska, Sch Nat Resources, Lincoln, NE 68583 USAUniv Nebraska Lincoln, Peter Kiewit Inst, Dept Civil Engn, Omaha, NE 68182 USA
Snow, Daniel D.
Kolok, Alan S.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Nebraska, Med Ctr, Dept Environm Agr & Occupat Hlth, 986805 Nebraska Med Ctr, Omaha, NE 68198 USA
Univ Nebraska, Dept Biol, 6001 Dodge St, Omaha, NE 68182 USAUniv Nebraska Lincoln, Peter Kiewit Inst, Dept Civil Engn, Omaha, NE 68182 USA
Kolok, Alan S.
Bartelt-Hunt, Shannon L.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Nebraska Lincoln, Peter Kiewit Inst, Dept Civil Engn, Omaha, NE 68182 USAUniv Nebraska Lincoln, Peter Kiewit Inst, Dept Civil Engn, Omaha, NE 68182 USA
机构:
Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R ChinaSo Illinois Univ, Fisheries & Illinois Aquaculture Ctr, Carbondale, IL 62901 USA
You, Jing
Brennan, Amanda
论文数: 0引用数: 0
h-index: 0
机构:
So Illinois Univ, Fisheries & Illinois Aquaculture Ctr, Carbondale, IL 62901 USA
So Illinois Univ, Dept Zool, Carbondale, IL 62901 USASo Illinois Univ, Fisheries & Illinois Aquaculture Ctr, Carbondale, IL 62901 USA
Brennan, Amanda
Lydy, Michael J.
论文数: 0引用数: 0
h-index: 0
机构:
So Illinois Univ, Fisheries & Illinois Aquaculture Ctr, Carbondale, IL 62901 USA
So Illinois Univ, Dept Zool, Carbondale, IL 62901 USASo Illinois Univ, Fisheries & Illinois Aquaculture Ctr, Carbondale, IL 62901 USA