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Biomechanical and leaf climate relationships: A comparison of ferns and seed plants

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dc.contributor.author Peppe, Daniel J. en
dc.contributor.author Lemons, Casee R. en
dc.contributor.author Royer, Dana L. en
dc.contributor.author Wing, Scott L. en
dc.contributor.author Wright, Ian J. en
dc.contributor.author Lusk, Christopher H. en
dc.contributor.author Rhoden, Chazelle H. en
dc.date.accessioned 2015-01-21T18:24:15Z
dc.date.available 2015-01-21T18:24:15Z
dc.date.issued 2014
dc.identifier.citation Peppe, Daniel J., Lemons, Casee R., Royer, Dana L., Wing, Scott L., Wright, Ian J., Lusk, Christopher H., and Rhoden, Chazelle H. 2014. "<a href="https://repository.si.edu/handle/10088/22679">Biomechanical and leaf–climate relationships: A comparison of ferns and seed plants</a>." <em>American Journal of Botany</em>. 101 (2):338&ndash;347. <a href="https://doi.org/10.3732/ajb.1300220">https://doi.org/10.3732/ajb.1300220</a> en
dc.identifier.issn 0002-9122
dc.identifier.uri http://hdl.handle.net/10088/22679
dc.description.abstract Premise of the study: Relationships of leaf size and shape (physiognomy) with climate have been well characterized for woody non-monocotyledonous angiosperms (dicots), allowing the development of models for estimating paleoclimate from fossil leaves. More recently, petiole width of seed plants has been shown to scale closely with leaf mass. By measuring petiole width and leaf area in fossils, leaf mass per area (MA) can be estimated and an approximate leaf life span inferred. However, little is known about these relationships in ferns, a clade with a deep fossil record and with the potential to greatly expand the applicability of these proxies. Methods: We measured the petiole width, MA, and leaf physiognomic characters of 179 fern species from 188 locations across six continents. We applied biomechanical models and assessed the relationship between leaf physiognomy and climate using correlational approaches. Key results: The scaling relationship between area-normalized petiole width and MA differs between fern fronds and pinnae. The scaling relationship is best modeled as an end-loaded cantilevered beam, which is different from the best-fit biomechanical model for seed plants. Fern leaf physiognomy is not influenced by climatic conditions. Conclusions: The cantilever beam model can be applied to fossil ferns. The lack of sensitivity of leaf physiognomy to climate in ferns argues against their use to reconstruct paleoclimate. Differences in climate sensitivity and biomechanical relationships between ferns and seed plants may be driven by differences in their hydraulic conductivity and/or their differing evolutionary histories of vein architecture and leaf morphology. en
dc.relation.ispartof American Journal of Botany en
dc.title Biomechanical and leaf climate relationships: A comparison of ferns and seed plants en
dc.type Journal Article en
dc.identifier.srbnumber 118884
dc.identifier.doi 10.3732/ajb.1300220
rft.jtitle American Journal of Botany
rft.volume 101
rft.issue 2
rft.spage 338
rft.epage 347
dc.description.SIUnit NH-Paleobiology en
dc.description.SIUnit NMNH en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 338
dc.citation.epage 347

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