Lower soil carbon stocks in exotic vs. native grasslands are driven by carbonate losses

dc.contributor.author Wilsey, Brian
dc.contributor.author Xu, Xia
dc.contributor.author Polley, H. Wayne
dc.contributor.author Hofmockel, Kirsten
dc.contributor.author Hall, Steven
dc.contributor.department Ecology, Evolution and Organismal Biology
dc.date 2020-05-19T14:16:39.000
dc.date.accessioned 2020-06-30T02:18:40Z
dc.date.available 2020-06-30T02:18:40Z
dc.date.issued 2020-7
dc.description.abstract Global change includes invasion by exotic (nonnative) plant species and altered precipitation patterns, and these factors may affect terrestrial carbon (C) storage. We measured soil C changes in experimental mixtures of all exotic or all native grassland plant species under two levels of summer drought stress (0 and +128 mm). After 8 yr, soils were sampled in 10-cm increments to 100-cm depth to determine if soil C differed among treatments in deeper soils. Total soil C (organic + inorganic) content was significantly higher under native than exotic plantings, and differences increased with depth. Surprisingly, differences after 8 yr in C were due to carbonate and not organic C fractions, where carbonate was ~250 g C/m2 lower to 1-m soil depth under exotic than native plantings. Our results indicate that soil carbonate is an active pool and can respond to differences in plant species traits over timescales of years. Significant losses of inorganic C might be avoided by conserving native grasslands in subhumid ecosystems.
dc.description.comments <p>This article is published as Wilsey, Brian, Xia Xu, H. Wayne Polley, Kirsten Hofmockel, and Steven J. Hall. "Lower soil carbon stocks in exotic vs. native grasslands are driven by carbonate losses." <em>Ecology</em> 101 (2020): e03039. doi: <a href="https://doi.org/10.1002/ecy.3039">10.1002/ecy.3039</a>. Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/eeob_ag_pubs/397/
dc.identifier.articleid 1403
dc.identifier.contextkey 17350898
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath eeob_ag_pubs/397
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/23282
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/eeob_ag_pubs/397/2020_Wilsey_LowerCarbon.pdf|||Fri Jan 14 23:56:36 UTC 2022
dc.source.uri 10.1002/ecy.3039
dc.subject.disciplines Ecology and Evolutionary Biology
dc.subject.disciplines Plant Sciences
dc.subject.disciplines Soil Science
dc.subject.keywords C4 grasses
dc.subject.keywords carbon storage
dc.subject.keywords inorganic carbon
dc.subject.keywords invasive species
dc.subject.keywords novel ecosystems
dc.subject.keywords organic carbon
dc.subject.keywords prairie
dc.subject.keywords soil depth
dc.subject.keywords tallgrass prairie
dc.title Lower soil carbon stocks in exotic vs. native grasslands are driven by carbonate losses
dc.type article
dc.type.genre article
dspace.entity.type Publication
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