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Trade-offs in seedling growth and survival within and across tropical forest microhabitats

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dc.contributor.author Inman-Narahari, Faith en
dc.contributor.author Ostertag, Rebecca en
dc.contributor.author Asner, Gregory P. en
dc.contributor.author Cordell, Susan en
dc.contributor.author Hubbell, Stephen P. en
dc.contributor.author Sack, Lawren en
dc.date.accessioned 2014-12-04T20:35:05Z
dc.date.available 2014-12-04T20:35:05Z
dc.date.issued 2014
dc.identifier.citation Inman-Narahari, Faith, Ostertag, Rebecca, Asner, Gregory P., Cordell, Susan, Hubbell, Stephen P., and Sack, Lawren. 2014. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F22661">Trade-offs in seedling growth and survival within and across tropical forest microhabitats</a>." <em>Ecology and Evolution</em>. 4 (19):3755&ndash;3767. <a href="https://doi.org/10.1002/ece3.1196">https://doi.org/10.1002/ece3.1196</a> en
dc.identifier.issn 2045-7758
dc.identifier.uri http://hdl.handle.net/10088/22661
dc.description.abstract For niche differences to maintain coexistence of sympatric species, each species must grow and/or survive better than each of the others in at least one set of conditions (i.e., performance trade-offs). However, the extent of niche differentiation in tropical forests remains highly debated. We present the first test of performance trade-offs for wild seedlings in a tropical forest. We measured seedling relative growth rate (RGR) and survival of four common native woody species across 18 light, substrate, and topography microhabitats over 2.5 years within Hawaiian montane wet forest, an ideal location due to its low species diversity and strong species habitat associations. All six species pairs exhibited significant performance trade-offs across microhabitats and for RGR versus survival within microhabitats. We also found some evidence of performance equivalence, with species pairs having similar performance in 26% of comparisons across microhabitats. Across species, survival under low light was generally positively associated with RGR under high light. When averaged over all species, topography (slope, aspect, and elevation) explained most of the variation in RGR attributable to microhabitat variables (51 53%) followed by substrate type (35 37%) and light (11 12%). However, the relative effects of microhabitat differed among species and RGR metric (i.e., RGR for height, biomass, or leaf area). These findings indicate that performance trade-offs among species during regeneration are common in low-diversity tropical forest, although other mechanisms may better explain the coexistence of species with small performance differences. en
dc.relation.ispartof Ecology and Evolution en
dc.title Trade-offs in seedling growth and survival within and across tropical forest microhabitats en
dc.type Journal Article en
dc.identifier.srbnumber 127929
dc.identifier.doi 10.1002/ece3.1196
rft.jtitle Ecology and Evolution
rft.volume 4
rft.issue 19
rft.spage 3755
rft.epage 3767
dc.description.SIUnit research associate en
dc.description.SIUnit STRI en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 3755
dc.citation.epage 3767

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