Land Use, Geology, Enrichment, and Stream Biota in the Eastern Ridge and Valley Ecoregion: Implications for Nutrient Criteria Development
Identifieur interne : 000989 ( Main/Exploration ); précédent : 000988; suivant : 000990Land Use, Geology, Enrichment, and Stream Biota in the Eastern Ridge and Valley Ecoregion: Implications for Nutrient Criteria Development
Auteurs : Lei Zheng [États-Unis] ; Jeroen Gerritsen [États-Unis] ; John Beckman [États-Unis] ; Jon Ludwig [États-Unis] ; Sam Wilkes [États-Unis]Source :
- JAWRA Journal of the American Water Resources Association [ 1093-474X ] ; 2008-12.
English descriptors
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Abstract
Abstract: The eastern panhandle region of West Virginia is entirely within the Appalachian Ridge and Valley ecoregion. It is underlain by limestone in the eastern part and by shale and sandstone in the western part. Agricultural and urban development has affected the condition of the streams of this region. We examined samples from 165 stations in the Ridge and Valley, collected from 1998 to 2004. Land use, geological characteristics, physical and chemical parameters, and algal and macroinvertebrate assemblages were used to identify potential stressors that affect streams in the region. Our analyses indicated that both human land uses and ecoregional differences led to elevated nutrient concentrations in streams of the study areas. Multiple regression analyses indicated that both agricultural and urban land use in the watershed were associated with high nutrient concentrations (NO2+3, total nitrogen, and total phosphorus) in streams. These elevated nutrient concentrations have led to increased algal biomass, increased trophic state, and degradation of macroinvertebrate community in the streams. Values of the West Virginia Stream Condition Index, as well as several other benthic macroinvertebrate metrics, decreased with increased nutrient concentrations and conductivity, especially in the limestone region. When regional differences were partitioned out in the analysis, nutrient concentrations became the strongest stressor in the limestone region while conductivity exhibited less of an effect on macroinvertebrate metrics. Meanwhile, periphyton diagnostic metrics also responded to increased nutrient concentrations, suggesting nutrients could be a cause of biological degradation in the Eastern Ridge and Valley region. Multiple approaches and multiple lines of evidence (reference approach and stressor‐response approach) were applied to develop nutrient benchmarks for different geological regions in the study watershed.
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DOI: 10.1111/j.1752-1688.2008.00257.x
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Mills</wicri:cityArea></affiliation></author><author><name sortKey="Beckman, John" sort="Beckman, John" uniqKey="Beckman J" first="John" last="Beckman">John Beckman</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><placeName><region type="state">Virginie-Occidentale</region></placeName><wicri:cityArea>Senior Environmental Scientist (Beckman), Director, Water Resources Group (Ludwig), and Senior Environmental Scientist (Wilkes), Tetra Tech, Inc., 405 Capitol Street, Suite 608, Charleston</wicri:cityArea></affiliation></author><author><name sortKey="Ludwig, Jon" sort="Ludwig, Jon" uniqKey="Ludwig J" first="Jon" last="Ludwig">Jon Ludwig</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><placeName><region type="state">Virginie-Occidentale</region></placeName><wicri:cityArea>Senior Environmental Scientist (Beckman), Director, Water Resources Group (Ludwig), and Senior Environmental Scientist (Wilkes), Tetra Tech, Inc., 405 Capitol 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from="1521">1521</biblScope><biblScope unit="page" to="1536">1536</biblScope></imprint><idno type="ISSN">1093-474X</idno></series><idno type="istex">3142E1A7A0D7A108145B9EE25F0E502E26478492</idno><idno type="DOI">10.1111/j.1752-1688.2008.00257.x</idno><idno type="ArticleID">JAWR257</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1093-474X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>criteria</term><term>geology</term><term>land use</term><term>macroinvertebrates</term><term>nutrients</term><term>periphyton</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Abstract: The eastern panhandle region of West Virginia is entirely within the Appalachian Ridge and Valley ecoregion. It is underlain by limestone in the eastern part and by shale and sandstone in the western part. Agricultural and urban development has affected the condition of the streams of this region. We examined samples from 165 stations in the Ridge and Valley, collected from 1998 to 2004. Land use, geological characteristics, physical and chemical parameters, and algal and macroinvertebrate assemblages were used to identify potential stressors that affect streams in the region. Our analyses indicated that both human land uses and ecoregional differences led to elevated nutrient concentrations in streams of the study areas. Multiple regression analyses indicated that both agricultural and urban land use in the watershed were associated with high nutrient concentrations (NO2+3, total nitrogen, and total phosphorus) in streams. These elevated nutrient concentrations have led to increased algal biomass, increased trophic state, and degradation of macroinvertebrate community in the streams. Values of the West Virginia Stream Condition Index, as well as several other benthic macroinvertebrate metrics, decreased with increased nutrient concentrations and conductivity, especially in the limestone region. When regional differences were partitioned out in the analysis, nutrient concentrations became the strongest stressor in the limestone region while conductivity exhibited less of an effect on macroinvertebrate metrics. Meanwhile, periphyton diagnostic metrics also responded to increased nutrient concentrations, suggesting nutrients could be a cause of biological degradation in the Eastern Ridge and Valley region. Multiple approaches and multiple lines of evidence (reference approach and stressor‐response approach) were applied to develop nutrient benchmarks for different geological regions in the study watershed.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Maryland</li><li>Virginie-Occidentale</li></region></list><tree><country name="États-Unis"><region name="Maryland"><name sortKey="Zheng, Lei" sort="Zheng, Lei" uniqKey="Zheng L" first="Lei" last="Zheng">Lei Zheng</name></region><name sortKey="Beckman, John" sort="Beckman, John" uniqKey="Beckman J" first="John" last="Beckman">John Beckman</name><name sortKey="Gerritsen, Jeroen" sort="Gerritsen, Jeroen" uniqKey="Gerritsen J" first="Jeroen" last="Gerritsen">Jeroen Gerritsen</name><name sortKey="Ludwig, Jon" sort="Ludwig, Jon" uniqKey="Ludwig J" first="Jon" last="Ludwig">Jon Ludwig</name><name sortKey="Wilkes, Sam" sort="Wilkes, Sam" uniqKey="Wilkes S" first="Sam" last="Wilkes">Sam Wilkes</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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