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Extracellular Enzyme Activities and Soil Organic Matter Dynamics for Northern Hardwood Forests receiving Simulated Nitrogen Deposition

dc.contributor.authorSinsabaugh, Robert L.en_US
dc.contributor.authorGallo, Marcy E.en_US
dc.contributor.authorLauber, Christian L.en_US
dc.contributor.authorWaldrop, Mark P.en_US
dc.contributor.authorZak, Donald R.en_US
dc.date.accessioned2006-09-08T20:23:08Z
dc.date.available2006-09-08T20:23:08Z
dc.date.issued2005-08en_US
dc.identifier.citationSinsabaugh, Robert L.; Gallo, Marcy E.; Lauber, Christian; Waldrop, Mark P.; Zak, Donald R.; (2005). "Extracellular Enzyme Activities and Soil Organic Matter Dynamics for Northern Hardwood Forests receiving Simulated Nitrogen Deposition." Biogeochemistry 75(2): 201-215. <http://hdl.handle.net/2027.42/42480>en_US
dc.identifier.issn0168-2563en_US
dc.identifier.issn1573-515Xen_US
dc.identifier.urihttps://hdl.handle.net/2027.42/42480
dc.description.abstractAnthropogenic nitrogen enrichment alters decomposition processes that control the flux of carbon (C) and nitrogen (N) from soil organic matter (SOM) pools. To link N-driven changes in SOM to microbial responses, we measured the potential activity of several extracellular enzymes involved in SOM degradation at nine experimental sites located in northern Michigan. Each site has three treatment plots (ambient, +30 and +80 kg N ha −1  y −1 ). Litter and soil samples were collected on five dates over the third growing season of N treatment. Phenol oxidase, peroxidase and cellobiohydrolase activities showed significant responses to N additions. In the Acer saccharum – Tilia americana ecosystem, oxidative activity was 38% higher in the litter horizon of high N treatment plots, relative to ambient plots, while oxidative activity in mineral soil showed little change. In the A. saccharum – Quercus rubra and Q. velutina – Q. alba ecosystems, oxidative activities declined in both litter (15 and 23%, respectively) and soil (29 and 38%, respectively) in response to high N treatment while cellobiohydrolase activity increased (6 and 39% for litter, 29 and 18% for soil, respectively). Over 3 years, SOM content in the high N plots has decreased in the Acer – Tilia ecosystem and increased in the two Quercus ecosystems, relative to ambient plots. For all three ecosystems, differences in SOM content in relation to N treatment were directly related ( r 2  = 0.92) to an enzyme activity factor that included both oxidative and hydrolytic enzyme responses.en_US
dc.format.extent268614 bytes
dc.format.extent3115 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.language.isoen_US
dc.publisherKluwer Academic Publishers; Springeren_US
dc.subject.otherGeosciencesen_US
dc.subject.otherGeochemistryen_US
dc.subject.otherBiochemistry, Generalen_US
dc.subject.otherSoil Science & Conservationen_US
dc.subject.otherTerrestrial Pollutionen_US
dc.subject.otherCellulaseen_US
dc.subject.otherDecompositionen_US
dc.subject.otherExtracellular Enzyme Activityen_US
dc.subject.otherNitrogen Depositionen_US
dc.subject.otherPhenol Oxidaseen_US
dc.subject.otherSoil Organic Matteren_US
dc.titleExtracellular Enzyme Activities and Soil Organic Matter Dynamics for Northern Hardwood Forests receiving Simulated Nitrogen Depositionen_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelEcology and Evolutionary Biologyen_US
dc.subject.hlbsecondlevelNatural Resources and Environmenten_US
dc.subject.hlbsecondlevelMolecular, Cellular and Developmental Biologyen_US
dc.subject.hlbtoplevelScienceen_US
dc.subject.hlbtoplevelHealth Sciencesen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumSchool of Natural Resources, University of Michigan, Ann Arbor, MI, 48109, USAen_US
dc.contributor.affiliationumSchool of Natural Resources, University of Michigan, Ann Arbor, MI, 48109, USAen_US
dc.contributor.affiliationotherBiology Department, University of New Mexico, Albuquerque, NM, 87131, USAen_US
dc.contributor.affiliationotherBiology Department, University of New Mexico, Albuquerque, NM, 87131, USAen_US
dc.contributor.affiliationotherBiology Department, University of New Mexico, Albuquerque, NM, 87131, USAen_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/42480/1/10533_2004_Article_7112.pdfen_US
dc.identifier.doihttp://dx.doi.org/10.1007/s10533-004-7112-1en_US
dc.identifier.sourceBiogeochemistryen_US
dc.owningcollnameInterdisciplinary and Peer-Reviewed


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