Invaded Grassland Communities Have Altered Stability-Maintenance Mechanisms But Equal Stability Compared to Native Communities

dc.contributor.author Wilsey, Brian
dc.contributor.author Daneshgar, Pedram
dc.contributor.author Wilsey, Brian
dc.contributor.author Hofmockel, Kirsten
dc.contributor.author Polley, H. Wayne
dc.contributor.department Ecology, Evolution and Organismal Biology
dc.date 2018-02-17T03:05:53.000
dc.date.accessioned 2020-06-30T02:19:08Z
dc.date.available 2020-06-30T02:19:08Z
dc.date.issued 2014-01-01
dc.description.abstract <p>Theory predicts that stability should increase with diversity via several mechanisms. We tested predictions in a 5-year experiment that compared low-diversity exotic to high-diversity native plant mixtures under two irrigation treatments. The study included both wet and dry years. Variation in biomass across years (CV) was 50% lower in mixtures than monocultures of both native and exotic species. Growth among species was more asynchronous and overyielding values were greater during and after a drought in native than exotic mixtures. Mean-variance slopes indicated strong portfolio effects in both community types, but the intercept was higher for exotics than for natives, suggesting that exotics were inherently more variable than native species. However, this failed to result in higher CV's in exotic communities because species that heavily dominated plots tended to have lower than expected variance. Results indicate that diversity-stability mechanisms are altered in invaded systems compared to native ones they replaced.</p>
dc.description.comments <p>This article is from <em>Ecology Letter</em><em>s </em>17 (2014): 92, doi:<a href="http://dx.doi.org/10.1111/ele.12213" target="_blank">10.1111/ele.12213</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/eeob_ag_pubs/86/
dc.identifier.articleid 1085
dc.identifier.contextkey 7734612
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath eeob_ag_pubs/86
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/23344
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/eeob_ag_pubs/86/0-2014_Wilsey_InvadedGrasslandSupp.pdf|||Sat Jan 15 02:13:56 UTC 2022
dc.source.bitstream archive/lib.dr.iastate.edu/eeob_ag_pubs/86/2014_Wilsey_InvadedGrassland.pdf|||Sat Jan 15 02:13:58 UTC 2022
dc.source.uri 10.1111/ele.12213
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Biodiversity
dc.subject.disciplines Ecology and Evolutionary Biology
dc.subject.keywords Diversity-stability relationship
dc.subject.keywords dominant species
dc.subject.keywords evenness
dc.subject.keywords grassland
dc.subject.keywords invasive species
dc.subject.keywords overyielding
dc.subject.keywords population synchrony
dc.subject.keywords portfolio effect
dc.subject.keywords sampling effect
dc.supplemental.bitstream 2014_Wilsey_InvadedGrasslandSupp.pdf
dc.title Invaded Grassland Communities Have Altered Stability-Maintenance Mechanisms But Equal Stability Compared to Native Communities
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 8c9719e8-92a4-4db1-bdf5-8e387ef59e2d
relation.isOrgUnitOfPublication 6fa4d3a0-d4c9-4940-945f-9e5923aed691
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