Differences in Shade Tolerance Help Explain Varying Success of Two Sympatric Alnus Species

dc.contributor.author Schrader, James
dc.contributor.author Graves, William
dc.contributor.author Graves, William
dc.contributor.author Rice, Stanley
dc.contributor.author Gibson, J.
dc.contributor.department Horticulture
dc.date 2018-02-13T17:51:09.000
dc.date.accessioned 2020-06-30T04:35:14Z
dc.date.available 2020-06-30T04:35:14Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2006
dc.date.embargo 2013-11-20
dc.date.issued 2006-09-01
dc.description.abstract <p><em>Alnus maritima</em> and <em>Alnus serrulata</em> are riparian shrubs that occur in similar habitats in the southern and eastern United States.<em>Alnus serrulata</em> is abundant throughout this range, but <em>A. maritima</em> is rare, occurring only in small populations in Oklahoma and Georgia and on the Delmarva Peninsula. <em>Alnus maritima</em> is more resistant than <em>A. serrulata</em> to water and temperature stresses, but the degree to which insolation influences the restricted distribution of <em>A. maritima</em> is unknown. Our goals were to characterize the shade tolerance of <em>A. maritima</em> and <em>A. serrulata</em> and determine whether differences in shade tolerance could help explain the differing ecological success of the two species. Measurements in nature showed that leaves of <em>A. serrulata</em>have greater concentrations of chlorophyll than do leaves of <em>A. maritima</em>, and a greater percentage of <em>A. serrulata</em> inhabit shaded sites. Two experiments evaluating the resistance of seedlings to light‐deficit stress revealed that <em>A. maritima</em> had a greater photosynthetic capacity and grew more quickly than <em>A. serrulata</em> in full sunlight. In shade, survival of seedlings was lower and reductions in photosynthesis and growth were greater for <em>A. maritima</em> than for <em>A. serrulata</em>. We conclude that <em>A. serrulata</em> is tolerant and <em>A. maritima</em> is intolerant of shade. Moreover, we conclude that shade intolerance strongly restricts the potential niches of <em>A. maritima</em> within the region where the shade‐tolerant <em>A. serrulata</em> is comparatively abundant.</p>
dc.description.comments <p>This article is from <em>International Journal of Plant Science</em> 167 (2006): 979–989, doi:<a href="http://dx.doi.org/10.1086/505798" target="_blank">10.1086/505798</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/hort_pubs/4/
dc.identifier.articleid 1001
dc.identifier.contextkey 4840541
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath hort_pubs/4
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/42624
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/hort_pubs/4/2006_SchraderJA_DifferencesShadeTolerance.pdf|||Fri Jan 14 23:57:38 UTC 2022
dc.source.uri 10.1086/505798
dc.subject.disciplines Horticulture
dc.subject.keywords Alnus maritima
dc.subject.keywords Alnus serrulata
dc.subject.keywords light requirements
dc.subject.keywords photosynthetic response
dc.subject.keywords realized niche
dc.title Differences in Shade Tolerance Help Explain Varying Success of Two Sympatric Alnus Species
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 2eae1c57-10a8-41cf-93a1-69f34d5e57de
relation.isOrgUnitOfPublication df043cd4-424c-49f5-8685-318972aae642
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