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Heterotrophic Respiration and the Divergence of Productivity and Carbon Sequestration

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dc.contributor.authorNoormets, Askoen
dc.contributor.authorBracho, Rosvelen
dc.contributor.authorWard, Eric J.en
dc.contributor.authorSeiler, John R.en
dc.contributor.authorStrahm, Brian D.en
dc.contributor.authorLin, Wenen
dc.contributor.authorMcElligott, Kristin M.en
dc.contributor.authorDomec, Jean-Christopheen
dc.contributor.authorGonzález-Benecke, Carlosen
dc.contributor.authorJokela, Eric J.en
dc.contributor.authorMarkewitz, Danielen
dc.contributor.authorMeek, Cassandraen
dc.contributor.authorMiao, Guofangen
dc.contributor.authorMcNulty, Steve G.en
dc.contributor.authorKing, John S.en
dc.contributor.authorSamuelson, Lisaen
dc.contributor.authorSun, Geen
dc.contributor.authorTeskey, Robert O.en
dc.contributor.authorVogel, Jason G.en
dc.contributor.authorWill, Rodney E.en
dc.contributor.authorYang, Jinyanen
dc.contributor.authorMartin, Timothy A.en
dc.contributor.departmentForest Resources and Environmental Conservationen
dc.date.accessioned2021-07-01T12:00:22Zen
dc.date.available2021-07-01T12:00:22Zen
dc.date.issued2021-04-16en
dc.description.abstractNet primary productivity (NPP) and net ecosystem production (NEP) are often used interchangeably, as their difference, heterotrophic respiration (soil heterotrophic CO2 efflux, R-SH = NPP-NEP), is assumed a near-fixed fraction of NPP. Here, we show, using a range-wide replicated experimental study in loblolly pine (Pinus taeda) plantations that R-SH responds differently than NPP to fertilization and drought treatments, leading to the divergent responses of NPP and NEP. Across the natural range of the species, the moderate responses of NPP (+11%) and R-SH (-7%) to fertilization combined such that NEP increased nearly threefold in ambient control and 43% under drought treatment. A 13% decline in R-SH under drought led to a 26% increase in NEP while NPP was unaltered. Such drought benefit for carbon sequestration was nearly twofold in control, but disappeared under fertilization. Carbon sequestration efficiency, NEP:NPP, varied twofold among sites, and increased up to threefold under both drought and fertilization.en
dc.description.adminPublic domain – authored by a U.S. government employeeen
dc.description.notesThis study was conducted as part of The Pine Integrated Network: Education, Mitigation, and Adaptation Project (PINEMAP) that was a Coordinated Agricultural Project funded by the USDA National Institute of Food and Agriculture, Award #2011-68002-30185. The authors thank Foley Timber and Land Company (Florida), Ed Hurliman (Oklahoma), and the Virginia Department of Forestry, Appomattox-Buckingham State Forest (Virginia) for providing property access to install the experiments. Partial support was provided by US Forest Service Eastern Forest Environmental Threat Assessment Center Grant 08-JV-11330147-038, and McIntire-Stennis Project 121209 94160. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.en
dc.description.sponsorshipUSDA National Institute of Food and AgricultureUnited States Department of Agriculture (USDA) [2011-68002-30185]; US Forest Service Eastern Forest Environmental Threat Assessment Center [08-JV-11330147-038]; McIntire-Stennis Project [121209 94160]en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1029/2020GL092366en
dc.identifier.eissn1944-8007en
dc.identifier.issn0094-8276en
dc.identifier.issue7en
dc.identifier.othere2020GL092366en
dc.identifier.urihttp://hdl.handle.net/10919/104081en
dc.identifier.volume48en
dc.language.isoenen
dc.rightsPublic Domainen
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/en
dc.subjectcarbon sequestrationen
dc.subjectdroughten
dc.subjectfertilizationen
dc.subjectheterotrophic respirationen
dc.subjectnet ecosystem productionen
dc.subjectnet primary productionen
dc.titleHeterotrophic Respiration and the Divergence of Productivity and Carbon Sequestrationen
dc.title.serialGeophysical Research Lettersen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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