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Fire adaptation in Neblinaria celiae (Theaceae), a high-elevation rosette shrub endemic to a wet equatorial tepui

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dc.contributor.author Givnish, Thomas J. en
dc.contributor.author McDiarmid, Roy W. en
dc.contributor.author Buck, William R. en
dc.date.accessioned 2008-06-19T16:02:16Z
dc.date.available 2008-06-19T16:02:16Z
dc.date.issued 1986
dc.identifier.citation Givnish, Thomas J., McDiarmid, Roy W., and Buck, William R. 1986. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F4515">Fire adaptation in Neblinaria celiae (Theaceae), a high-elevation rosette shrub endemic to a wet equatorial tepui</a>." <em>Oecologia</em>. 70 (4):481&ndash;485. en
dc.identifier.issn 0029-8549
dc.identifier.uri http://hdl.handle.net/10088/4515
dc.description.abstract Neblinaria celiae (Theaceae), a rosette shrub endemic to the exceedingly rainy summit of remote Cerro de la Neblina in southern Venezuela, has a previously undescribed set of adaptations to fire. Its growth form entails sparse branching, massive terminal leaf rosettes, and thick bark. It is highly fire-tolerant, with a survival rate of 93% in a stand recently ignited by lightning, vs. 0% in seven co-occurring woody species. Survival increases sharply with rosette height, favoring a sparsely branched habit that would maximize the rate of upward growth through the sparse fuel layer supported by a sterile substrate. Thick bark and massive rosettes help protect cambial and foliar meristems from brief exposure to high temperatures. Rosettes on shorter plants are exposed to greater damage from fire near the ground and, as expected, are bigger and impound more rainwater; the greater number of leaves nearly balances the greater leaf mortality caused by fire. We relate Neblinaria&#39;s growth form to its dominance atop Neblina, to a general model for the evolution of sparse branching, and to the evolution of growth form in other tepui plants. en
dc.format.extent 292213 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.relation.ispartof Oecologia en
dc.title Fire adaptation in Neblinaria celiae (Theaceae), a high-elevation rosette shrub endemic to a wet equatorial tepui en
dc.type Journal Article en
dc.identifier.srbnumber 59987
rft.jtitle Oecologia
rft.volume 70
rft.issue 4
rft.spage 481
rft.epage 485
dc.description.SIUnit NH-Vertebrate Zoology en
dc.description.SIUnit NMNH en
dc.citation.spage 481
dc.citation.epage 485


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