Nutrient uptake in streams draining agricultural catchments of the midwestern United States
Identifieur interne : 001273 ( Istex/Corpus ); précédent : 001272; suivant : 001274Nutrient uptake in streams draining agricultural catchments of the midwestern United States
Auteurs : Melody J. Bernot ; Jennifer L. Tank ; Todd V. Royer ; Mark B. DavidSource :
- Freshwater Biology [ 0046-5070 ] ; 2006-03.
English descriptors
- KwdEn :
Abstract
1. Agriculture is a major contributor of non‐point source pollution to surface waters in the midwestern United States, resulting in eutrophication of freshwater aquatic ecosystems and development of hypoxia in the Gulf of Mexico. Agriculturally influenced streams are diverse in morphology and have variable nutrient concentrations. Understanding how nutrients are transformed and retained within agricultural streams may aid in mitigating increased nutrient export to downstream ecosystems. 2. We studied six agriculturally influenced streams in Indiana and Michigan to develop a more comprehensive understanding of the factors controlling nutrient retention and export in agricultural streams using nutrient addition and isotopic tracer studies. 3. Metrics of nutrient uptake indicated that nitrate uptake was saturated in these streams whereas ammonium and phosphorus uptake increased with higher concentrations. Phosphorus uptake was likely approaching saturation as evidenced by decreasing uptake velocities with concentration; ammonium uptake velocity also declined with concentration, though not significantly. 4. Higher whole‐stream uptake rates of phosphorus and ammonium were associated with the observed presence of stream autotrophs (e.g. algae and macrophytes). However, there was no significant relationship between measures of nutrient uptake and stream metabolism. Water‐column nutrient concentrations were positively correlated with gross primary production but not community respiration. 5. Overall, nutrient uptake and metabolism were affected by nutrient concentrations in these agriculturally influenced streams. Biological uptake of ammonium and phosphorus was not saturated, although nitrate uptake did appear to be saturated in these ecosystems. Biological activity in agriculturally influenced streams is higher relative to more pristine streams and this increased biological activity likely influences nutrient retention and transport to downstream ecosystems.
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DOI: 10.1111/j.1365-2427.2006.01508.x
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Bernot</name><affiliation><mods:affiliation>Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, U.S.A.</mods:affiliation></affiliation></author><author><name sortKey="Tank, Jennifer L" sort="Tank, Jennifer L" uniqKey="Tank J" first="Jennifer L." last="Tank">Jennifer L. Tank</name><affiliation><mods:affiliation>Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, U.S.A.</mods:affiliation></affiliation></author><author><name sortKey="Royer, Todd V" sort="Royer, Todd V" uniqKey="Royer T" first="Todd V." last="Royer">Todd V. Royer</name><affiliation><mods:affiliation>Department of Biological Sciences, Kent State University, Kent, OH, U.S.A.</mods:affiliation></affiliation></author><author><name sortKey="David, Mark B" sort="David, Mark B" uniqKey="David M" first="Mark B." last="David">Mark B. 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Agriculture is a major contributor of non‐point source pollution to surface waters in the midwestern United States, resulting in eutrophication of freshwater aquatic ecosystems and development of hypoxia in the Gulf of Mexico. Agriculturally influenced streams are diverse in morphology and have variable nutrient concentrations. Understanding how nutrients are transformed and retained within agricultural streams may aid in mitigating increased nutrient export to downstream ecosystems. 2. We studied six agriculturally influenced streams in Indiana and Michigan to develop a more comprehensive understanding of the factors controlling nutrient retention and export in agricultural streams using nutrient addition and isotopic tracer studies. 3. Metrics of nutrient uptake indicated that nitrate uptake was saturated in these streams whereas ammonium and phosphorus uptake increased with higher concentrations. Phosphorus uptake was likely approaching saturation as evidenced by decreasing uptake velocities with concentration; ammonium uptake velocity also declined with concentration, though not significantly. 4. Higher whole‐stream uptake rates of phosphorus and ammonium were associated with the observed presence of stream autotrophs (e.g. algae and macrophytes). However, there was no significant relationship between measures of nutrient uptake and stream metabolism. Water‐column nutrient concentrations were positively correlated with gross primary production but not community respiration. 5. Overall, nutrient uptake and metabolism were affected by nutrient concentrations in these agriculturally influenced streams. Biological uptake of ammonium and phosphorus was not saturated, although nitrate uptake did appear to be saturated in these ecosystems. Biological activity in agriculturally influenced streams is higher relative to more pristine streams and this increased biological activity likely influences nutrient retention and transport to downstream ecosystems.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>MELODY J. BERNOT</name><affiliations><json:string>Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, U.S.A.</json:string></affiliations></json:item><json:item><name>JENNIFER L. TANK</name><affiliations><json:string>Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, U.S.A.</json:string></affiliations></json:item><json:item><name>TODD V. ROYER</name><affiliations><json:string>Department of Biological Sciences, Kent State University, Kent, OH, U.S.A.</json:string></affiliations></json:item><json:item><name>MARK B. 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Agriculture is a major contributor of non‐point source pollution to surface waters in the midwestern United States, resulting in eutrophication of freshwater aquatic ecosystems and development of hypoxia in the Gulf of Mexico. Agriculturally influenced streams are diverse in morphology and have variable nutrient concentrations. Understanding how nutrients are transformed and retained within agricultural streams may aid in mitigating increased nutrient export to downstream ecosystems. 2. We studied six agriculturally influenced streams in Indiana and Michigan to develop a more comprehensive understanding of the factors controlling nutrient retention and export in agricultural streams using nutrient addition and isotopic tracer studies. 3. Metrics of nutrient uptake indicated that nitrate uptake was saturated in these streams whereas ammonium and phosphorus uptake increased with higher concentrations. Phosphorus uptake was likely approaching saturation as evidenced by decreasing uptake velocities with concentration; ammonium uptake velocity also declined with concentration, though not significantly. 4. Higher whole‐stream uptake rates of phosphorus and ammonium were associated with the observed presence of stream autotrophs (e.g. algae and macrophytes). However, there was no significant relationship between measures of nutrient uptake and stream metabolism. Water‐column nutrient concentrations were positively correlated with gross primary production but not community respiration. 5. Overall, nutrient uptake and metabolism were affected by nutrient concentrations in these agriculturally influenced streams. Biological uptake of ammonium and phosphorus was not saturated, although nitrate uptake did appear to be saturated in these ecosystems. 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Agriculture is a major contributor of non‐point source pollution to surface waters in the midwestern United States, resulting in eutrophication of freshwater aquatic ecosystems and development of hypoxia in the Gulf of Mexico. Agriculturally influenced streams are diverse in morphology and have variable nutrient concentrations. Understanding how nutrients are transformed and retained within agricultural streams may aid in mitigating increased nutrient export to downstream ecosystems. 2. We studied six agriculturally influenced streams in Indiana and Michigan to develop a more comprehensive understanding of the factors controlling nutrient retention and export in agricultural streams using nutrient addition and isotopic tracer studies. 3. Metrics of nutrient uptake indicated that nitrate uptake was saturated in these streams whereas ammonium and phosphorus uptake increased with higher concentrations. Phosphorus uptake was likely approaching saturation as evidenced by decreasing uptake velocities with concentration; ammonium uptake velocity also declined with concentration, though not significantly. 4. Higher whole‐stream uptake rates of phosphorus and ammonium were associated with the observed presence of stream autotrophs (e.g. algae and macrophytes). However, there was no significant relationship between measures of nutrient uptake and stream metabolism. Water‐column nutrient concentrations were positively correlated with gross primary production but not community respiration. 5. Overall, nutrient uptake and metabolism were affected by nutrient concentrations in these agriculturally influenced streams. Biological uptake of ammonium and phosphorus was not saturated, although nitrate uptake did appear to be saturated in these ecosystems. Biological activity in agriculturally influenced streams is higher relative to more pristine streams and this increased biological activity likely influences nutrient retention and transport to downstream ecosystems.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>agriculture</term></item><item><term>nitrogen</term></item><item><term>nutrient uptake</term></item><item><term>phosphorus</term></item><item><term>stream</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2006-03">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/6235020551D22A46E02E2D45BBF9D16F65F2C47D/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Publishing Ltd</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1365-2427</doi><issn type="print">0046-5070</issn><issn type="electronic">1365-2427</issn><idGroup><id type="product" value="FWB"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="FRESHWATER BIOLOGY">Freshwater Biology</title></titleGroup></publicationMeta><publicationMeta level="part" position="03003"><doi origin="wiley">10.1111/fwb.2006.51.issue-3</doi><numberingGroup><numbering type="journalVolume" number="51">51</numbering><numbering type="journalIssue" number="3">3</numbering></numberingGroup><coverDate startDate="2006-03">March 2006</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="9" status="forIssue"><doi origin="wiley">10.1111/j.1365-2427.2006.01508.x</doi><idGroup><id type="unit" value="FWB1508"></id></idGroup><countGroup><count type="pageTotal" number="11"></count></countGroup><titleGroup><title type="tocHeading1">Original Articles</title></titleGroup><eventGroup><event type="firstOnline" date="2006-02-10"></event><event type="publishedOnlineFinalForm" date="2006-02-10"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.2 mode:FullText source:FullText result:FullText" date="2010-03-06"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-26"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-16"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="499">499</numbering><numbering type="pageLast" number="509">509</numbering></numberingGroup><correspondenceTo>Melody J. Bernot, Department of Biological Sciences, Murray State University, Murray, KY 42071, U.S.A.
E‐mail: <email>melody.bernot@murraystate.edu</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:FWB.FWB1508.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>(Manuscript accepted 1 December 2005)</unparsedEditorialHistory><countGroup><count type="figureTotal" number="3"></count><count type="tableTotal" number="2"></count></countGroup><titleGroup><title type="main">Nutrient uptake in streams draining agricultural catchments of the midwestern United States</title><title type="shortAuthors"><i>M.J. Bernot</i> et al.</title><title type="short"><i>Nutrient uptake in streams</i></title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1"><personName><givenNames>MELODY J.</givenNames><familyName>BERNOT</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a1"><personName><givenNames>JENNIFER L.</givenNames><familyName>TANK</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a2"><personName><givenNames>TODD V.</givenNames><familyName>ROYER</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a3"><personName><givenNames>MARK B.</givenNames><familyName>DAVID</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1"><unparsedAffiliation>Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, U.S.A.</unparsedAffiliation></affiliation><affiliation xml:id="a2"><unparsedAffiliation>Department of Biological Sciences, Kent State University, Kent, OH, U.S.A.</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="US"><unparsedAffiliation>Department of Natural Resources, University of Illinois, Urbana‐Champaign, Urbana, IL, U.S.A.</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1">agriculture</keyword><keyword xml:id="k2">nitrogen</keyword><keyword xml:id="k3">nutrient uptake</keyword><keyword xml:id="k4">phosphorus</keyword><keyword xml:id="k5">stream</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Summary</title><p>1. Agriculture is a major contributor of non‐point source pollution to surface waters in the midwestern United States, resulting in eutrophication of freshwater aquatic ecosystems and development of hypoxia in the Gulf of Mexico. Agriculturally influenced streams are diverse in morphology and have variable nutrient concentrations. Understanding how nutrients are transformed and retained within agricultural streams may aid in mitigating increased nutrient export to downstream ecosystems.</p><p>2. We studied six agriculturally influenced streams in Indiana and Michigan to develop a more comprehensive understanding of the factors controlling nutrient retention and export in agricultural streams using nutrient addition and isotopic tracer studies.</p><p>3. Metrics of nutrient uptake indicated that nitrate uptake was saturated in these streams whereas ammonium and phosphorus uptake increased with higher concentrations. Phosphorus uptake was likely approaching saturation as evidenced by decreasing uptake velocities with concentration; ammonium uptake velocity also declined with concentration, though not significantly.</p><p>4. Higher whole‐stream uptake rates of phosphorus and ammonium were associated with the observed presence of stream autotrophs (e.g. algae and macrophytes). However, there was no significant relationship between measures of nutrient uptake and stream metabolism. Water‐column nutrient concentrations were positively correlated with gross primary production but not community respiration.</p><p>5. Overall, nutrient uptake and metabolism were affected by nutrient concentrations in these agriculturally influenced streams. Biological uptake of ammonium and phosphorus was not saturated, although nitrate uptake did appear to be saturated in these ecosystems. Biological activity in agriculturally influenced streams is higher relative to more pristine streams and this increased biological activity likely influences nutrient retention and transport to downstream ecosystems.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Nutrient uptake in streams draining agricultural catchments of the midwestern United States</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Nutrient uptake in streams</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Nutrient uptake in streams draining agricultural catchments of the midwestern United States</title></titleInfo><name type="personal"><namePart type="given">MELODY J.</namePart><namePart type="family">BERNOT</namePart><affiliation>Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, U.S.A.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">JENNIFER L.</namePart><namePart type="family">TANK</namePart><affiliation>Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, U.S.A.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">TODD V.</namePart><namePart type="family">ROYER</namePart><affiliation>Department of Biological Sciences, Kent State University, Kent, OH, U.S.A.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">MARK B.</namePart><namePart type="family">DAVID</namePart><affiliation>Department of Natural Resources, University of Illinois, Urbana‐Champaign, Urbana, IL, U.S.A.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2006-03</dateIssued><edition>(Manuscript accepted 1 December 2005)</edition><copyrightDate encoding="w3cdtf">2006</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">3</extent><extent unit="tables">2</extent></physicalDescription><abstract lang="en">1. Agriculture is a major contributor of non‐point source pollution to surface waters in the midwestern United States, resulting in eutrophication of freshwater aquatic ecosystems and development of hypoxia in the Gulf of Mexico. Agriculturally influenced streams are diverse in morphology and have variable nutrient concentrations. Understanding how nutrients are transformed and retained within agricultural streams may aid in mitigating increased nutrient export to downstream ecosystems. 2. We studied six agriculturally influenced streams in Indiana and Michigan to develop a more comprehensive understanding of the factors controlling nutrient retention and export in agricultural streams using nutrient addition and isotopic tracer studies. 3. Metrics of nutrient uptake indicated that nitrate uptake was saturated in these streams whereas ammonium and phosphorus uptake increased with higher concentrations. Phosphorus uptake was likely approaching saturation as evidenced by decreasing uptake velocities with concentration; ammonium uptake velocity also declined with concentration, though not significantly. 4. Higher whole‐stream uptake rates of phosphorus and ammonium were associated with the observed presence of stream autotrophs (e.g. algae and macrophytes). However, there was no significant relationship between measures of nutrient uptake and stream metabolism. Water‐column nutrient concentrations were positively correlated with gross primary production but not community respiration. 5. Overall, nutrient uptake and metabolism were affected by nutrient concentrations in these agriculturally influenced streams. Biological uptake of ammonium and phosphorus was not saturated, although nitrate uptake did appear to be saturated in these ecosystems. Biological activity in agriculturally influenced streams is higher relative to more pristine streams and this increased biological activity likely influences nutrient retention and transport to downstream ecosystems.</abstract><subject lang="en"><genre>keywords</genre><topic>agriculture</topic><topic>nitrogen</topic><topic>nutrient uptake</topic><topic>phosphorus</topic><topic>stream</topic></subject><relatedItem type="host"><titleInfo><title>Freshwater Biology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0046-5070</identifier><identifier type="eISSN">1365-2427</identifier><identifier type="DOI">10.1111/(ISSN)1365-2427</identifier><identifier type="PublisherID">FWB</identifier><part><date>2006</date><detail type="volume"><caption>vol.</caption><number>51</number></detail><detail type="issue"><caption>no.</caption><number>3</number></detail><extent unit="pages"><start>499</start><end>509</end><total>11</total></extent></part></relatedItem><identifier type="istex">6235020551D22A46E02E2D45BBF9D16F65F2C47D</identifier><identifier type="DOI">10.1111/j.1365-2427.2006.01508.x</identifier><identifier type="ArticleID">FWB1508</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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|area= SisAgriV1
|flux= Istex
|étape= Corpus
|type= RBID
|clé= ISTEX:6235020551D22A46E02E2D45BBF9D16F65F2C47D
|texte= Nutrient uptake in streams draining agricultural catchments of the midwestern United States
}}
| This area was generated with Dilib version V0.6.28. |  |