The role of periphyton in mediating the effects of pollution in a stream ecosystem.
Identifieur interne : 003075 ( Main/Exploration ); précédent : 003074; suivant : 003076The role of periphyton in mediating the effects of pollution in a stream ecosystem.
Auteurs : Walter R. Hill [États-Unis] ; Michael G. Ryon ; John G. Smith ; S Marshall Adams ; Harry L. Boston ; Arthur J. StewartSource :
- Environmental management [ 1432-1009 ] ; 2010.
Descripteurs français
- KwdFr :
- Animaux (MeSH), Azote (métabolisme), Azote (toxicité), Biomasse (MeSH), Conservation des ressources naturelles (méthodes), Conservation des ressources naturelles (économie), Eucaryotes (métabolisme), Eutrophisation (MeSH), Facteurs temps (MeSH), Invertébrés (MeSH), Métaux (métabolisme), Métaux (toxicité), Photosynthèse (MeSH), Poissons (MeSH), Polluants chimiques de l'eau (métabolisme), Pollution chimique de l'eau (prévention et contrôle), Rivières (MeSH), Surveillance de l'environnement (MeSH), Tennessee (MeSH), Écosystème (MeSH).
- MESH :
- métabolisme : Azote, Eucaryotes, Métaux, Polluants chimiques de l'eau.
- méthodes : Conservation des ressources naturelles.
- prévention et contrôle : Pollution chimique de l'eau.
- toxicité : Azote, Métaux.
- économie : Conservation des ressources naturelles.
- Animaux, Biomasse, Eutrophisation, Facteurs temps, Invertébrés, Photosynthèse, Poissons, Rivières, Surveillance de l'environnement, Tennessee, Écosystème.
English descriptors
- KwdEn :
- Animals (MeSH), Biomass (MeSH), Conservation of Natural Resources (economics), Conservation of Natural Resources (methods), Ecosystem (MeSH), Environmental Monitoring (MeSH), Eukaryota (metabolism), Eutrophication (MeSH), Fishes (MeSH), Invertebrates (MeSH), Metals (metabolism), Metals (toxicity), Nitrogen (metabolism), Nitrogen (toxicity), Photosynthesis (MeSH), Rivers (MeSH), Tennessee (MeSH), Time Factors (MeSH), Water Pollutants, Chemical (metabolism), Water Pollution, Chemical (prevention & control).
- MESH :
- chemical , metabolism : Metals, Nitrogen, Water Pollutants, Chemical.
- geographic : Tennessee.
- economics : Conservation of Natural Resources.
- metabolism : Eukaryota.
- methods : Conservation of Natural Resources.
- prevention & control : Water Pollution, Chemical.
- chemical , toxicity : Metals, Nitrogen.
- Animals, Biomass, Ecosystem, Environmental Monitoring, Eutrophication, Fishes, Invertebrates, Photosynthesis, Rivers, Time Factors.
Abstract
The effects of pollutants on primary producers ramify through ecosystems because primary producers provide food and structure for higher trophic levels and they mediate the biogeochemical cycling of nutrients and contaminants. Periphyton (attached algae) were studied as part of a long-term biological monitoring program designed to guide remediation efforts by the Department of Energy's Y-12 National Security Complex on East Fork Poplar Creek (EFPC) in Oak Ridge, Tennessee. High concentrations of nutrients entering EFPC were responsible for elevated periphyton production and placed the stream in a state of eutrophy. High rates of primary production at upstream locations in EFPC were associated with alterations in both invertebrate and fish communities. Grazers represented >50% of the biomass of invertebrates and fish near the Y-12 Complex but <10% at downstream and reference sites. An index of epilithic periphyton production accounted for 95% of the site-to-site variation in biomass of grazing fish. Analyses of heavy metals in EFPC periphyton showed that concentrations of zinc, cadmium, copper and nickel in periphyton decreased exponentially with distance downstream from Y-12. Zinc uptake by periphyton was estimated to reduce the concentration of this metal in stream water approximately 60% over a 5-km reach of EFPC. Management options for mitigating eutrophy in EFPC include additional reductions in nutrient inputs and/or allowing streamside trees to grow and shade the stream. However, reducing periphyton growth may lead to greater downstream transport of contaminants while simultaneously causing higher concentrations of mercury and PCBs in fish at upstream sites.
DOI: 10.1007/s00267-010-9425-2
PubMed: 20108138
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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Periphyton (attached algae) were studied as part of a long-term biological monitoring program designed to guide remediation efforts by the Department of Energy's Y-12 National Security Complex on East Fork Poplar Creek (EFPC) in Oak Ridge, Tennessee. High concentrations of nutrients entering EFPC were responsible for elevated periphyton production and placed the stream in a state of eutrophy. High rates of primary production at upstream locations in EFPC were associated with alterations in both invertebrate and fish communities. Grazers represented >50% of the biomass of invertebrates and fish near the Y-12 Complex but <10% at downstream and reference sites. An index of epilithic periphyton production accounted for 95% of the site-to-site variation in biomass of grazing fish. Analyses of heavy metals in EFPC periphyton showed that concentrations of zinc, cadmium, copper and nickel in periphyton decreased exponentially with distance downstream from Y-12. Zinc uptake by periphyton was estimated to reduce the concentration of this metal in stream water approximately 60% over a 5-km reach of EFPC. Management options for mitigating eutrophy in EFPC include additional reductions in nutrient inputs and/or allowing streamside trees to grow and shade the stream. However, reducing periphyton growth may lead to greater downstream transport of contaminants while simultaneously causing higher concentrations of mercury and PCBs in fish at upstream sites.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">20108138</PMID><DateCompleted><Year>2010</Year><Month>06</Month><Day>17</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1432-1009</ISSN><JournalIssue CitedMedium="Internet"><Volume>45</Volume><Issue>3</Issue><PubDate><Year>2010</Year><Month>Mar</Month></PubDate></JournalIssue><Title>Environmental management</Title><ISOAbbreviation>Environ Manage</ISOAbbreviation></Journal><ArticleTitle>The role of periphyton in mediating the effects of pollution in a stream ecosystem.</ArticleTitle><Pagination><MedlinePgn>563-76</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1007/s00267-010-9425-2</ELocationID><Abstract><AbstractText>The effects of pollutants on primary producers ramify through ecosystems because primary producers provide food and structure for higher trophic levels and they mediate the biogeochemical cycling of nutrients and contaminants. Periphyton (attached algae) were studied as part of a long-term biological monitoring program designed to guide remediation efforts by the Department of Energy's Y-12 National Security Complex on East Fork Poplar Creek (EFPC) in Oak Ridge, Tennessee. High concentrations of nutrients entering EFPC were responsible for elevated periphyton production and placed the stream in a state of eutrophy. High rates of primary production at upstream locations in EFPC were associated with alterations in both invertebrate and fish communities. Grazers represented >50% of the biomass of invertebrates and fish near the Y-12 Complex but <10% at downstream and reference sites. An index of epilithic periphyton production accounted for 95% of the site-to-site variation in biomass of grazing fish. Analyses of heavy metals in EFPC periphyton showed that concentrations of zinc, cadmium, copper and nickel in periphyton decreased exponentially with distance downstream from Y-12. Zinc uptake by periphyton was estimated to reduce the concentration of this metal in stream water approximately 60% over a 5-km reach of EFPC. Management options for mitigating eutrophy in EFPC include additional reductions in nutrient inputs and/or allowing streamside trees to grow and shade the stream. However, reducing periphyton growth may lead to greater downstream transport of contaminants while simultaneously causing higher concentrations of mercury and PCBs in fish at upstream sites.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Hill</LastName><ForeName>Walter R</ForeName><Initials>WR</Initials><AffiliationInfo><Affiliation>Environmental Sciences Division, Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, TN 37831-6036, USA. wrhill@illlinois.edu</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Ryon</LastName><ForeName>Michael G</ForeName><Initials>MG</Initials></Author><Author ValidYN="Y"><LastName>Smith</LastName><ForeName>John G</ForeName><Initials>JG</Initials></Author><Author ValidYN="Y"><LastName>Adams</LastName><ForeName>S Marshall</ForeName><Initials>SM</Initials></Author><Author ValidYN="Y"><LastName>Boston</LastName><ForeName>Harry L</ForeName><Initials>HL</Initials></Author><Author 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first="S Marshall" last="Adams">S Marshall Adams</name><name sortKey="Boston, Harry L" sort="Boston, Harry L" uniqKey="Boston H" first="Harry L" last="Boston">Harry L. Boston</name><name sortKey="Ryon, Michael G" sort="Ryon, Michael G" uniqKey="Ryon M" first="Michael G" last="Ryon">Michael G. Ryon</name><name sortKey="Smith, John G" sort="Smith, John G" uniqKey="Smith J" first="John G" last="Smith">John G. Smith</name><name sortKey="Stewart, Arthur J" sort="Stewart, Arthur J" uniqKey="Stewart A" first="Arthur J" last="Stewart">Arthur J. Stewart</name></noCountry><country name="États-Unis"><region name="Tennessee"><name sortKey="Hill, Walter R" sort="Hill, Walter R" uniqKey="Hill W" first="Walter R" last="Hill">Walter R. Hill</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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