{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T06:13:04Z","timestamp":1770358384689,"version":"3.49.0"},"reference-count":44,"publisher":"Oxford University Press (OUP)","issue":"10","license":[{"start":{"date-parts":[[2011,10,1]],"date-time":"2011-10-01T00:00:00Z","timestamp":1317427200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"},{"start":{"date-parts":[[2011,8,17]],"date-time":"2011-08-17T00:00:00Z","timestamp":1313539200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["setac.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2011,10,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Patterns of spatial variation of mercury and methylmercury (MeHg) were examined in sediments and muscle tissue of largemouth bass (Micropterus salmoides) from Amistad International Reservoir, a large and hydrologically complex subtropical water body in the Rio Grande drainage. The distributions of both Hg and MeHg were compared with environmental and biological factors known to influence production of MeHg. The highest concentrations of total Hg (THg) in sediment were found in the Rio Grande arm of the reservoir, whereas MeHg was highest at sites in the Devils River arm and inundated Pecos River (often more than 3.0\u2009ng\/g). Conditions in the sediments of the Devils River arm and Pecos River channel were likely more favorable to the production of MeHg, with higher sediment porewater dissolved organic carbon, and porewater sulfate levels in the optimal range for methylation. Although the detection of different groups of sulfate-reducing bacteria by polymerase chain reaction (PCR) was generally correlated with MeHg concentrations, bacterial counts via fluorescent in situ hybridization (FISH) did not correlate with MeHg. A sample of 156 largemouth bass (&amp;lt;30\u2009cm) showed a spatial pattern similar to that of MeHg in sediments, where fish from the Devils River arm of the reservoir had higher muscle Hg concentrations than those collected in the Rio Grande arm. In 88 bass of legal sport fishing size (&amp;gt;35\u2009cm), 77% exceeded the 0.3\u2009mg\/kg U.S. Environmental Protection Agency screening value. This study shows that significant variation in sediment MeHg and biotic Hg concentration can exist within lakes and reservoirs and that it can correspond to variation in environmental conditions and Hg methylation. Environ. Toxicol. Chem. 2011;30:2300\u20132311. \u00a9 2011 SETAC<\/jats:p>","DOI":"10.1002\/etc.626","type":"journal-article","created":{"date-parts":[[2011,7,18]],"date-time":"2011-07-18T11:27:42Z","timestamp":1310988462000},"page":"2300-2311","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Spatial variability in the speciation and bioaccumulation of mercury in an arid subtropical reservoir ecosystem"],"prefix":"10.1093","volume":"30","author":[{"given":"Jesse C","family":"Becker","sequence":"first","affiliation":[{"name":"Department of Biology, Texas State University\u2013San Marcos, Aquatic Station, San Marcos, Texas, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alan W","family":"Groeger","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weston H","family":"Nowlin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Matthew M","family":"Chumchal","sequence":"additional","affiliation":[{"name":"Department of Biology, Texas Christian University, Fort Worth, Texas, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dittmar","family":"Hahn","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2011,10,1]]},"reference":[{"key":"2026020510273754600_bib1","doi-asserted-by":"crossref","first-page":"241","DOI":"10.1080\/20016491089226","article-title":"Mercury in the aquatic environment: A review of factors affecting methylation","volume":"31","author":"Ullrich","year":"2001","journal-title":"Crit Rev Environ Sci Technol"},{"key":"2026020510273754600_bib2","first-page":"262","volume-title":"Biogeochemistry of Environmentally Important Trace Elements","author":"Benoit","year":"2003"},{"key":"2026020510273754600_bib3","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1579\/0044-7447(2007)36[33:ROMF]2.0.CO;2","article-title":"Recovery of mercury-contaminated fisheries","volume":"36","author":"Munthe","year":"2007","journal-title":"Ambio"},{"key":"2026020510273754600_bib4","doi-asserted-by":"crossref","first-page":"29","DOI":"10.1641\/B570107","article-title":"Biological mercury hotspots in the northeastern United States and southeastern Canada","volume":"57","author":"Evers","year":"2007","journal-title":"BioScience"},{"key":"2026020510273754600_bib5","doi-asserted-by":"crossref","first-page":"4095","DOI":"10.1016\/j.scitotenv.2009.03.010","article-title":"Sediment mercury dynamics and historical trends of mercury deposition in the St. Lawrence River area of concern near Cornwall, Ontario, Canada","volume":"407","author":"Delongchamp","year":"2009","journal-title":"Sci Total Environ"},{"key":"2026020510273754600_bib6","doi-asserted-by":"crossref","first-page":"226","DOI":"10.1016\/j.scitotenv.2008.06.034","article-title":"The competitive role of organic carbon and dissolved sulfide in controlling the distribution of mercury in freshwater lake sediments","volume":"405","author":"Belzile","year":"2008","journal-title":"Sci Total Environ"},{"key":"2026020510273754600_bib7","doi-asserted-by":"crossref","first-page":"429","DOI":"10.1007\/s00248-003-1005-z","article-title":"Sediment microbial community composition and methylmercury pollution at four mercury mine-impacted sites","volume":"46","author":"Batten","year":"2003","journal-title":"Microb Ecol"},{"key":"2026020510273754600_bib8","doi-asserted-by":"crossref","first-page":"2430","DOI":"10.1128\/AEM.66.6.2430-2437.2000","article-title":"Sulfate-reducing bacteria methylate mercury at variable rates in pure culture and in marine sediments","volume":"66","author":"King","year":"2000","journal-title":"Appl Environ Microbiol"},{"key":"2026020510273754600_bib9","doi-asserted-by":"crossref","first-page":"135","DOI":"10.1007\/s10646-004-6265-y","article-title":"Patterns of Hg bioaccumulation and transfer in aquatic food webs across multi-lake studies in the northeast US","volume":"14","author":"Chen","year":"2005","journal-title":"Ecotoxicology"},{"key":"2026020510273754600_bib10","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1577\/T07-009.1","article-title":"Habitat-specific differences in mercury concentration in a top predator from a shallow lake","volume":"137","author":"Chumchal","year":"2008","journal-title":"Trans Am Fish Soc"},{"key":"2026020510273754600_bib11","doi-asserted-by":"crossref","first-page":"1010","DOI":"10.1021\/es0704986","article-title":"Spatial characteristics of net methylmercury production hot spots in peatlands","volume":"42","author":"Mitchell","year":"2008","journal-title":"Environ Sci Technol"},{"key":"2026020510273754600_bib12","first-page":"1","article-title":"Limnological differences between deep valley reservoirs and deep lakes","volume":"83","author":"Stra\u0161kraba","year":"1998","journal-title":"Int Rev Hydrobiol"},{"key":"2026020510273754600_bib13","doi-asserted-by":"crossref","first-page":"1762","DOI":"10.1002\/etc.224","article-title":"Mercury contamination of the fish community of a semi-arid and arid river system: spatial variation and the influence of environmental gradients","volume":"29","author":"Smith","year":"2010","journal-title":"Environ Toxicol Chem"},{"key":"2026020510273754600_bib14","article-title":"Proceedings","author":"Groeger","year":"2011"},{"key":"2026020510273754600_bib15","author":"U.S. Geological Survey","year":"1997"},{"key":"2026020510273754600_bib16","author":"Texas Comission on Environmental Quality","year":"2004"},{"key":"2026020510273754600_bib17","doi-asserted-by":"crossref","first-page":"1940","DOI":"10.1016\/j.apgeochem.2006.08.016","article-title":"Mercury methylation influenced by areas of past mercury mining in the Terlingua district, Southwest Texas, USA","volume":"21","author":"Gray","year":"2006","journal-title":"Appl Geochem"},{"key":"2026020510273754600_bib18","doi-asserted-by":"crossref","first-page":"962","DOI":"10.1897\/08-197.1","article-title":"Ecological factors regulating mercury contamination of fish from Caddo Lake, Texas, USA","volume":"28","author":"Chumchal","year":"2009","journal-title":"Environ Toxicol Chem"},{"key":"2026020510273754600_bib19","first-page":"A177","article-title":"Spatiotemporal trends in fish mercury from a mine-dominated ecosystem: Clear Lake, California","volume":"18","author":"Suchanek","year":"2008","journal-title":"Ecol Appl"},{"key":"2026020510273754600_bib20","doi-asserted-by":"crossref","first-page":"309","DOI":"10.1007\/s00244-002-1191-6","article-title":"Mercury concentrations in fish from Lake Mead, USA, related to fish size, condition, trophic level, location, and consumption risk","volume":"43","author":"Cizdziel","year":"2002","journal-title":"Arch Environ Contam Toxicol"},{"key":"2026020510273754600_bib21","author":"U.S. Environmental Protection Agency","year":"1997"},{"key":"2026020510273754600_bib22","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1080\/07438149409354190","article-title":"Chemical classification and trophic characteristics of Texas reservoirs","volume":"10","author":"Ground","year":"1994","journal-title":"Lake Reservoir Manag"},{"key":"2026020510273754600_bib23","author":"U.S. Geological Survey","year":"2001"},{"key":"2026020510273754600_bib24","volume-title":"Limnology: Inland Water Ecosystems","author":"Kalff","year":"2001"},{"key":"2026020510273754600_bib25","doi-asserted-by":"crossref","first-page":"185","DOI":"10.1007\/s002030050486","article-title":"Analysis of bacterial community structure in bulk soil by in situ hybridization","volume":"168","author":"Zarda","year":"1997","journal-title":"Arch Microbiol"},{"key":"2026020510273754600_bib26","doi-asserted-by":"crossref","first-page":"331","DOI":"10.1111\/j.1365-2400.2005.00456.x","article-title":"Activity patterns of largemouth bass in a subtropical US reservoir","volume":"12","author":"Sammons","year":"2005","journal-title":"Fish Manag Ecol"},{"key":"2026020510273754600_bib27","doi-asserted-by":"crossref","first-page":"543","DOI":"10.1146\/annurev.ecolsys.29.1.543","article-title":"The chemical cycle and bioaccumulation of mercury","volume":"29","author":"Morel","year":"1998","journal-title":"Annu Rev Ecol Syst"},{"key":"2026020510273754600_bib28","doi-asserted-by":"crossref","first-page":"4974","DOI":"10.1021\/es0483645","article-title":"Determination of MeHg in environmental sample matrices using Hg\u2013thiourea complex ion chromatography with on-line cold vapor generation and atomic fluorescence spectrometric detection","volume":"39","author":"Shade","year":"2005","journal-title":"Environ Sci Technol"},{"key":"2026020510273754600_bib29","author":"U.S. Environmental Protection Agency","year":"1998"},{"key":"2026020510273754600_bib30","doi-asserted-by":"crossref","first-page":"7747","DOI":"10.1128\/AEM.00757-07","article-title":"Analysis of nitrogen-fixing members of the epsilon subclass of Proteobacteria in salt marsh sediments","volume":"73","author":"Welsh","year":"2007","journal-title":"Appl Environ Microbiol"},{"key":"2026020510273754600_bib31","doi-asserted-by":"crossref","first-page":"614","DOI":"10.1128\/aem.58.2.614-623.1992","article-title":"Molecular and microscopic identification of sufate-reducing bacteria in multispecies biofilms","volume":"58","author":"Amann","year":"1992","journal-title":"Appl Environ Microbiol"},{"key":"2026020510273754600_bib32","doi-asserted-by":"crossref","first-page":"1693","DOI":"10.1099\/00221287-146-7-1693","article-title":"Development of oligonucleotide probes and PCR primers for detecting phylogenetic subgroups of sulfate-reducing bacteria","volume":"146","author":"Daly","year":"2000","journal-title":"Microbiol"},{"key":"2026020510273754600_bib33","doi-asserted-by":"crossref","first-page":"3605","DOI":"10.1128\/aem.62.10.3605-3613.1996","article-title":"Degradative capacities and 16S rRNA-targeted whole-cell hybridization of sulfate-reducing bacteria in an anaerobic enrichment culture utilizing alkylbenzenes from crude oil","volume":"62","author":"Rabus","year":"1996","journal-title":"Appl Environ Microbiol"},{"key":"2026020510273754600_bib34","doi-asserted-by":"crossref","first-page":"434","DOI":"10.1016\/S0723-2020(99)80053-8","article-title":"The domain-specific probe EUB338 is insufficient for the detection of all Bacteria: Development and evaluation of a more comprehensive probe set","volume":"22","author":"Daims","year":"1999","journal-title":"Syst Appl Microbiol"},{"key":"2026020510273754600_bib35","doi-asserted-by":"crossref","first-page":"237","DOI":"10.3354\/ame01197","article-title":"Whole-cell immunocytochemical detection of nitrogenase in cyanobacteria: improved protocol for highly fluorescent cells","volume":"51","author":"Taniuchi","year":"2008","journal-title":"Aquat Microb Ecol"},{"key":"2026020510273754600_bib36","author":"McCune","year":"2002"},{"key":"2026020510273754600_bib37","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1023\/A:1005997430906","article-title":"The use of polynomial regression analysis with indicator variables for interpretation of mercury in fish data","volume":"40","author":"Tremblay","year":"1998","journal-title":"Biogeochemistry"},{"key":"2026020510273754600_bib38","doi-asserted-by":"crossref","first-page":"A107","DOI":"10.1890\/06-1649.1","article-title":"Is Clear Lake methylmercury distribution decoupled from bulk mercury loading?","volume":"18","author":"Suchanek","year":"2008","journal-title":"Ecol Appl"},{"key":"2026020510273754600_bib39","doi-asserted-by":"crossref","first-page":"48","DOI":"10.1016\/j.jhydrol.2003.12.045","article-title":"Predicting locations sensitive to flash flooding in an arid environment","volume":"292","author":"Foody","year":"2004","journal-title":"J Hydrol"},{"key":"2026020510273754600_bib40","author":"U.S. Geological Survey","year":"1997"},{"key":"2026020510273754600_bib41","author":"Barnes","year":"1992"},{"key":"2026020510273754600_bib42","doi-asserted-by":"crossref","first-page":"1172","DOI":"10.1897\/03-170","article-title":"Assessment of mercury in waters, sediments, and biota of New Hampshire and Vermont lakes, USA, sampled using a geographically randomized design","volume":"23","author":"Kamman","year":"2004","journal-title":"Environ Toxicol Chem"},{"key":"2026020510273754600_bib43","doi-asserted-by":"crossref","first-page":"3","DOI":"10.1016\/S0168-6496(02)00461-0","article-title":"Factors influencing the detection of bacterial cells using fluorescence in situ hybridization (FISH): A quantitative review of published reports","volume":"44","author":"Bouvier","year":"2003","journal-title":"FEMS Microbiol Ecol"},{"key":"2026020510273754600_bib44","doi-asserted-by":"crossref","first-page":"457","DOI":"10.1128\/AEM.72.1.457-464.2006","article-title":"Mercury methylation from unexpected sources: Molybdate-inhibited freshwater sediments and an iron-reducing bacterium","volume":"72","author":"Fleming","year":"2006","journal-title":"Appl Environ Microbiol"}],"container-title":["Environmental Toxicology and Chemistry"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fetc.626","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/academic.oup.com\/etc\/article\/30\/10\/2300\/7765327","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/academic.oup.com\/etc\/article\/30\/10\/2300\/7765327","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,2,5]],"date-time":"2026-02-05T15:27:49Z","timestamp":1770305269000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/etc\/article\/30\/10\/2300\/7765327"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2011,10,1]]},"references-count":44,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2011,10,1]]},"published-print":{"date-parts":[[2011,10,1]]}},"URL":"https:\/\/doi.org\/10.1002\/etc.626","relation":{},"ISSN":["0730-7268","1552-8618"],"issn-type":[{"value":"0730-7268","type":"print"},{"value":"1552-8618","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[2011,10,1]]},"published":{"date-parts":[[2011,10,1]]},"assertion":[{"value":"2011-03-23","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2011-06-05","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2011-08-17","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}