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When are leaves good thermometers? A new case for Leaf Margin Analysis

Published online by Cambridge University Press:  08 February 2016

Peter Wilf
Peter Wilf*
Affiliation:
Department of Geology, Hayden Hall, University of Pennsylvania, Philadelphia, Pennsylvania 19104
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Abstract

Precise estimates of past temperatures are critical for understanding the evolution of organisms and the physical biosphere, and data from continental areas are an indispensable complement to the marine record of stable isotopes. Climate is considered to be a primary selective force on leaf morphology, and two widely used methods exist for estimating past mean annual temperatures from assemblages of fossil leaves. The first approach, Leaf Margin Analysis, is univariate, based on the positive correlation in modern forests between mean annual temperature and the proportion of species in a flora with untoothed leaf margins. The second approach, known as the Climate-Leaf Analysis Multivariate Program, is based on a modern data set that is multivariate. I argue here that the simpler, univariate approach will give paleotemperature estimates at least as precise as the multivariate method because (1) the temperature signal in the multivariate data set is dominated by the leaf-margin character; (2) the additional characters add minimal statistical precision and in practical use do not appear to improve the quality of the estimate; (3) the predictor samples in the univariate data set contain at least twice as many species as those in the multivariate data set; and (4) the presence of numerous sites in the multivariate data set that are both dry and extremely cold depresses temperature estimates for moist and nonfrigid paleofloras by about 2°C, unless the dry and cold sites are excluded from the predictor set.

New data from Western Hemisphere forests are used to test the univariate and multivariate methods and to compare observed vs. predicted error distributions for temperature estimates as a function of species richness. Leaf Margin Analysis provides excellent estimates of mean annual temperature for nine floral samples. Estimated temperatures given by 16 floral subsamples are very close both to actual temperatures and to the estimates from the samples. Temperature estimates based on the multivariate data set for four of the subsamples were generally less accurate than the estimates from Leaf Margin Analysis. Leaf-margin data from 45 transect collections demonstrate that sampling of low-diversity floras at extremely local scales can result in biased leaf-margin percentages because species abundance patterns are uneven. For climate analysis, both modern and fossil floras should be sampled over an area sufficient to minimize this bias and to maximize recovered species richness within a given climate.

Type
Articles
Information
Paleobiology , Volume 23 , Issue 3 , Summer 1997 , pp. 373 - 390
Copyright
Copyright © The Paleontological Society 

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References

Literature Cited

Acevedo-Rodríguez, P. 1996. Flora of St. John, U.S. Virgin Islands. Memoirs of the New York Botanical Garden 78:1–581.Google Scholar
Anderson, J., Anderson, H., Fatti, P., and Sichel, H. 1996. The Triassic Explosion(?): a statistical model for extrapolating biodiversity based on the terrestrial Molteno Formation. Paleobiology 22:318–328.CrossRefGoogle Scholar
Bailey, I. W., and Sinnott, E. W. 1915. A botanical index of Cretaceous and Tertiary climates. Science 41:831–834.CrossRefGoogle ScholarPubMed
Bailey, I. W., and Sinnott, E. W. 1916. The climatic distribution of certain types of angiosperm leaves. American Journal of Botany 3:24–39.CrossRefGoogle Scholar
Berry, E. W. 1916. The lower Eocene floras of southeastern North America. United States Geological Survey Professional Paper 91:1–481.Google Scholar
Brown, S., Lugo, A. E., Silander, S., and Liegel, L. 1983. Research history and opportunities in the Luquillo Experimental Forest. General Technical Report SO-44:1–128. U.S. Department of Agriculture, Southern Forest Experiment Station, New Orleans.CrossRefGoogle Scholar
Burnham, R. J. 1989. Relationships between standing vegetation and leaf litter in a paratropical forest: implications for paleobotany. Review of Palaeobotany and Palynology 58:5–32.CrossRefGoogle Scholar
Burnham, R. J. 1994. Paleoecological and floristic heterogeneity in the plant-fossil record—an analysis based on the Eocene of Washington. United States Geological Survey Bulletin 2085-B:1–36.Google Scholar
Burnham, R. J. In press. Stand characteristics and leaf litter composition of a dry forest hectare in Santa Rosa National Park, Costa Rica. Biotropica.Google Scholar
Burnham, R. J., Wing, S. L., and Parker, G. G. 1992. The reflection of deciduous forest communities in leaf litter: implications for autochthonous litter assemblages from the fossil record. Paleobiology 18:30–49.CrossRefGoogle Scholar
Canny, M. J. 1990. What becomes of the transpiration stream? New Phytologist 114:341–368.CrossRefGoogle ScholarPubMed
Chaney, R. W., and Sanborn, E. I. 1933. The Goshen flora of west central Oregon. Carnegie Institution of Washington Publication 439:1–103.Google Scholar
Chinea, J. D., Beymer, R. J., Rivera, C., Sastre de Jesús, I., and Scatena, F. N. 1993. An annotated list of the flora of the Bisley Area, Luquillo Experimental Forest, Puerto Rico 1987 to 1992. General Technical Report SO-94:1–12. U.S. Department of Agriculture, Southern Forest Experiment Station, New Orleans.CrossRefGoogle Scholar
Croat, T. B. 1978. Flora of Barro Colorado Island. Stanford University Press, Stanford.Google Scholar
Dallmeier, F., Foster, R. B., Romano, C. B., Rice, R., and Kabel, M. 1991a. User's guide to the Beni Biosphere Reserve, Biodiversity Plots 01 and 02, Bolivia. Smithsonian Institution, Man and the Biosphere Biological Diversity Program, Washington, D.C.Google Scholar
Dallmeier, F., Foster, R. B., Romano, C. B., Rice, R., and Kabel, M. 1991b. User's guide to the Beni Biosphere Reserve, Biodiversity Plots 03 and 04, Bolivia. Smithsonian Institution, Man and the Biosphere Biological Diversity Program, Washington, D.C.Google Scholar
Dallmeier, F., Kabel, M., Taylor, C., Romano, C. B., Rice, R., and Mayne, J. C. 1991. User's guide to the Bisley Biodiversity Plots, Luquillo Biosphere Reserve, Puerto Rico. Smithsonian Institution, Man and the Biosphere Biological Diversity Program, Washington, D.C.Google Scholar
Dallmeier, F., Comiskey, J., and Ray, G. 1993. User's guide to the Virgin Islands Biosphere Reserve, Biodiversity Plot 01, U.S. Virgin Islands. Smithsonian Institution, Man and the Biosphere Biological Diversity Program, Washington, D.C.Google Scholar
Dallmeier, F., Foster, R., and Comiskey, J. 1993a. User's guide to the Manu Biosphere Reserve Biodiversity Plots, Peru, Zones 01 and 02. Smithsonian Institution, Man and the Biosphere Biological Diversity Program, Washington, D.C.Google Scholar
Dallmeier, F., Foster, R., and Comiskey, J. 1993b. User's guide to the Manu Biosphere Reserve Biodiversity Plots, Peru, Zones 03 and 04. Smithsonian Institution, Man and the Biosphere Biological Diversity Program, Washington, D.C.Google Scholar
Dean, J. M., and Smith, A. P. 1978. Behavioral and morphological adaptations of a tropical plant to high rainfall. Biotropica 10:152–154.CrossRefGoogle Scholar
Dilcher, D. L. 1973. A paleoclimatic interpretation of the Eocene floras of southeastern North America. Pp. 39–59In Graham, A., ed. Vegetation and vegetational history of northern Latin America. Elsevier, Amsterdam.Google Scholar
Dolph, G. E. 1971. A comparison of local and regional leaf characteristics in Indiana. Proceedings of the Indiana Academy of Science 80:99–103.Google Scholar
Dolph, G. E. 1979. Variation in leaf margin with respect to climate in Costa Rica. Bulletin of the Torrey Botanical Club 106:104–109.CrossRefGoogle Scholar
Dolph, G. E. 1984. Leaf form of the woody plants of Indiana as related to environment. In Margaris, N. S., Arianoustou-Farragitaki, M., and Oechel, W. C., eds. Being alive on land. Tasks for Vegetation Science 13:51–61. Junk, The Hague.Google Scholar
Dolph, G. E., and Dilcher, D. L. 1979. Foliar physiognomy as an aid in determining paleoclimate. Palaeontographica, Abt. B 170:151–172.Google Scholar
Gentry, A. H. 1969. A comparison of some leaf characteristics of tropical dry forest and tropical wet forest in Costa Rica. Turrialba 19:419–428.Google Scholar
Givnish, T. J. 1979. On the adaptive significance of leaf form. Pp. 375–407In Solbrig, O. T., Jain, S., Johnson, G. B., and Raven, P. H., eds. Topics in plant population biology. Columbia University Press, New York.Google Scholar
Greenwood, D. R. 1992. Taphonomic constraints on foliar physiognomic interpretations of Late Cretaceous and Tertiary palaeoclimates. Review of Paleobotany and Palynology 71:149–190.CrossRefGoogle Scholar
Greenwood, D. R., and Wing, S. L. 1995. Eocene continental climates and latitudinal temperature gradients. Geology 23:1044–1048.2.3.CO;2>CrossRefGoogle Scholar
Gregory, K. M. 1994. Paleoclimate and paleoelevation of the 35 Ma Florissant flora, Front Range, Colorado. Paleoclimates 1:23–57.Google Scholar
Gregory, K. M., and Chase, C. G. 1992. Tectonic significance of paleobotanically estimated climate and altitude of the late Eocene erosion surface, Colorado. Geology 20:581–585.2.3.CO;2>CrossRefGoogle Scholar
Gregory, K. M., and McIntosh, W. C. 1996. Paleoclimate and paleoelevation of the Oligocene Pitch-Pinnacle flora, Sawatch Range, Colorado. Geological Society of America Bulletin 108:545–561.2.3.CO;2>CrossRefGoogle Scholar
Haberlandt, G. 1914. Physiological plant anatomy. Drummond, M., translator. MacMillan, London.Google Scholar
Halloy, S. R. P., and Mark, A. F. 1996. Comparative leaf morphology spectra of plant communities in New Zealand, the Andes and the European Alps. Journal of the Royal Society of New Zealand 26:41–78.CrossRefGoogle Scholar
Herman, A. B., and Spicer, R. A. 1996. Palaeobotanical evidence for a warm Cretaceous Arctic Ocean. Nature 380:330–333.CrossRefGoogle Scholar
Herman, A. B., and Spicer, R. A. 1997. New quantitative paleoclimate data for the Late Cretaceous Arctic: evidence for a warm polar ocean. Palaeogeography, Palaeoclimatology, Palaeoecology 128:227–251.CrossRefGoogle Scholar
Hill, M. O. 1974. Correspondence analysis: a neglected multivariate method. Applied Statistics 23:340–354.CrossRefGoogle Scholar
Hubbell, S. P., and Foster, R. B. 1983. Diversity of canopy trees in a neotropical forest and implications for conservation. Pp. 25–41In Sutton, S. L., Whitmore, T. C., and Chadwick, A. C., eds. Tropical rain forest: ecology and management. Blackwell Scientific, Oxford.Google Scholar
Huber, B. T., and Watkins, D. K. 1992. Biogeography of Campanian–Maastrichtian calcareous plankton in the region of the Southern Ocean: paleogeographic and paleoclimatic implications. In Kennett, J. P. and Warnke, D. A., eds. The Antarctic paleoenvironment: a perspective on global change. Antarctic Research Series 56:31–60. American Geophysical Union, Washington, D.C.Google Scholar
Hutchison, J. H. 1982. Turtle, crocodilian, and champsosaur diversity changes in the Cenozoic of the north-central region of western United States. Palaeogeography, Palaeoclimatology, Palaeoecology 37:149–164.CrossRefGoogle Scholar
Jacobs, B. F., and Deino, A. L. 1996. Test of climate-leaf physiognomy regression models, their application to two Miocene floras from Kenya, and 40Ar/39Ar dating of the late Miocene Kapturo site. Palaeogeography, Palaeoclimatology, Palaeoecology 123:259–271.CrossRefGoogle Scholar
Johnson, K. R., and Hickey, L. J. 1990. Megafloral change across the Cretaceous/Tertiary boundary in the northern Great Plains and Rocky Mountains, U.S.A. In Sharpton, V. L. and Ward, P. D., eds. Global catastrophes in Earth history: an interdisciplinary conference on impacts, volcanism, and mass mortality. Geological Society of America Special Paper 247:433–444. Boulder, Colo.Google Scholar
Johnson, K. R., and Wilf, P. 1996. Paleobotanical temperature curve for the Cretaceous-Tertiary boundary interval and a scenario for the revegetation of North America after the Terminal Cretaceous Event. Geological Society of America Abstracts with Programs 28:225.Google Scholar
Jordan, G. J. 1996. Eocene continental climates and latitudinal temperature gradients—comment. Geology 24:1054.2.3.CO;2>CrossRefGoogle Scholar
Koch, P. L., Bao, H., and Wing, S. L. 1996. Earliest Eocene cooling? Comparison of isotopic and paleobotanical estimates of temperature during the Paleocene–Eocene transition. Sixth North American Paleontological Convention Abstracts. Paleontological Society Special Publication 8:215.Google Scholar
Little, E. L. Jr., and Wadsworth, F. H. 1964. Common trees of Puerto Rico and the Virgin Islands. Agriculture Handbook 249:1–548. U.S. Department of Agriculture, Forest Service, Washington, D.C.Google Scholar
Little, E. L. Jr., Woodbury, R. O., and Wadsworth, F. H. 1974. Trees of Puerto Rico and the Virgin Islands, Vol 2. Agriculture Handbook 449:1–1024. U.S. Department of Agriculture, Forest Service, Washington, D.C.Google Scholar
Lugo, A. E. 1986. Water and the ecosystems of the Luquillo Experimental Forest. General Technical Report 50-63:1–17. U.S. Department of Agriculture, Southern Forest Experiment Station, New Orleans.CrossRefGoogle Scholar
Lugo, A. E., Ramos, O., Molina, S., Scatena, F. N., and Vélez Rodríguez, L. L. 1997. A fifty-three year record of land use change in the Guánica Forest Biosphere Reserve and its vicinity. International Institute of Tropical Forestry, Río Piedras, Puerto Rico.Google Scholar
Mosbrugger, V., and Roth, A. 1996. Biomechanics in fossil plant biology. Review of Palaeobotany and Palynology 90:195–207.CrossRefGoogle Scholar
Murphy, P. G., and Lugo, A. E. 1990. Dry forests of the tropics and subtropics: Guánica Forest in context. Acta Científica 4:15–24.Google Scholar
Parrish, J. T., and Spicer, R. A. 1988. Late Cretaceous terrestrial vegetation: a near-polar temperature curve. Geology 16:22–25.2.3.CO;2>CrossRefGoogle Scholar
Povey, D. A. R., Spicer, R. A., and England, P. C. 1994. Palaeobotanical investigation of early Tertiary palaeoelevations in northeastern Nevada: initial results. Review of Palaeobotany and Palynology 81:1–10.CrossRefGoogle Scholar
Raup, D. M. 1991. The future of analytical paleobiology. In Gilinsky, N. L. and Signor, P. W., eds. Analytical Paleobiology. Short Courses in Paleontology 4:207–216. Paleontological Society, University of Tennessee, Knoxville.Google Scholar
Reilly, A. E., Earhart, J. E., and Prance, G. T. 1990. Three subtropical secondary forests in the U.S. Virgin Islands: a comparative quantitative ecological inventory. Advances in Economic Botany 8:189–198.Google Scholar
Rhoads, A. F., and Klein, W. M. Jr. 1993. The vascular flora of Pennsylvania: annotated checklist and atlas. Memoirs of the American Philosophical Society 207:1–636. Philadelphia.Google Scholar
Richards, P. W. 1996. The tropical rain forest, 2d ed.Cambridge University Press, Cambridge.Google Scholar
Roth, A., Mosbrugger, V., Belz, G., and Neugebauer, H. J. 1995. Hydrodynamic modelling study of angiosperm leaf venation types. Botanica Acta 108:121–126.CrossRefGoogle Scholar
Roth, J. L., and Dilcher, D. L. 1978. Some considerations in leaf size and leaf margin analysis of fossil leaves. Courier Forschungsinstitut Senckenberg 30:165–171.Google Scholar
Savin, S. M. 1977. The history of the Earth's surface temperature during the past 100 million years. Annual Review of Earth and Planetary Sciences 5:319–355.CrossRefGoogle Scholar
Scatena, F. N. 1989. An introduction to the physiography and history of the Bisley Experiment Watersheds in the Luquillo Mountains of Puerto Rico. General Technical Report SO-72:1–22. U.S. Department of Agriculture, Southern Forest Experiment Station, New Orleans.Google Scholar
Stott, L. D., and Kennett, J. P. 1990. The paleoceanographic and paleoclimatic signature of the Cretaceous/Paleogene boundary in the Antarctic: stable isotopic results from ODP Leg 113. Proceedings of the Ocean Drilling Program, Scientific Results 113:829–848.Google Scholar
Taylor, D. W., and Hickey, L. J. 1996. Flowering plant origin, evolution, and phylogeny. Chapman and Hall, New York.CrossRefGoogle Scholar
Terborgh, J. 1990. An overview of research at Cocha Cashu Biological Station. Pp. 48–59In Gentry, A. H., ed. Four neotropical rainforests. Yale University Press, New Haven, Conn.Google Scholar
Webb, L. J. 1968. Environmental relationships of the structural types of Australian rain forest vegetation. Ecology 49:296–311.CrossRefGoogle Scholar
Wilf, P. 1996. How good are dicot leaves as thermometers? International Organization of Paleobotany Quadrennial Conference Abstracts 5:112.Google Scholar
Wilson, T. P., Canny, M. J., and McCully, M. E. 1991. Leaf teeth, transpiration and the retrieval of apoplastic solutes in balsam poplar. Physiologia Plantarum 83:225–232.CrossRefGoogle Scholar
Windsor, D. M. 1990. Climate and moisture variability in a tropical forest: long-term records from Barro Colorado Island, Panamá. Smithsonian Contributions to the Earth Sciences 29:1–145. Smithsonian Institution Press, Washington, D.C.CrossRefGoogle Scholar
Wing, S. L., and DiMichele, W. A. 1995. Conflict between local and global changes in plant diversity through geological time. Palaios 10:551–564.CrossRefGoogle Scholar
Wing, S. L., and Greenwood, D. R. 1993. Fossils and fossil climate: the case for equable continental interiors in the Eocene. Philosophical Transactions of the Royal Society of London B 341:243–252.Google Scholar
Wing, S. L., and Greenwood, D. R. 1996. Eocene continental climates and latitudinal temperature gradients—reply. Geology 24:1054–1055.Google Scholar
Wolfe, J. A. 1971. Tertiary climatic fluctuations and methods of analysis of Tertiary floras. Palaeogeography, Palaeoclimatology, Palaeoecology 9:27–57.CrossRefGoogle Scholar
Wolfe, J. A. 1978. A paleobotanical interpretation of Tertiary climates in the Northern Hemisphere. American Scientist 66:694–703.Google Scholar
Wolfe, J. A. 1979. Temperature parameters of humid to mesic forests of eastern Asia and relation to forests of other regions in the Northern Hemisphere and Australasia. U.S. Geological Survey Professional Paper 1106:1–37.Google Scholar
Wolfe, J. A. 1990. Palaeobotanical evidence for a marked temperature increase following the Cretaceous/Tertiary boundary. Nature 343:153–156.CrossRefGoogle Scholar
Wolfe, J. A. 1992. Climatic, floristic, and vegetational changes near the Eocene/Oligocene boundary in North America. Pp. 421–436In Prothero, D. R. and Berggren, W. A., eds. Eocene–Oligocene climatic and biotic evolution. Princeton University Press, Princeton, N.J.CrossRefGoogle Scholar
Wolfe, J. A. 1993. A method of obtaining climatic parameters from leaf assemblages. U.S. Geological Survey Bulletin 2040:1–71.Google Scholar
Wolfe, J. A. 1994a. Tertiary climatic changes at middle latitudes of western North America. Palaeogeography, Palaeoclimatology, Palaeoecology 108:195–205.CrossRefGoogle Scholar
Wolfe, J. A. 1994b. An analysis of Neogene climates in Beringia. Palaeogeography, Palaeoclimatology, Palaeoecology 108:207–216.CrossRefGoogle Scholar
Wolfe, J. A. 1994c. Alaskan Palaeogene climates as inferred from the CLAMP database. Pp. 223–237In Boulter, M. C. and Fisher, H. C., eds. Cenozoic plants and climates of the Arctic. Springer, Berlin.CrossRefGoogle Scholar
Wolfe, J. A. 1995. Paleoclimatic estimates from Tertiary leaf assemblages. Annual Review of Earth and Planetary Sciences 23:119–142.CrossRefGoogle Scholar
Wolfe, J. A., and Hopkins, D. M. 1967. Climatic changes recorded by Tertiary land floras in northwestern North America. In Hatai, K., ed. Tertiary correlations and climatic changes in the Pacific. Eleventh Pacific Science Congress 25:67–76.Google Scholar
Wolfe, J. A., and Poore, R. Z. 1982. Tertiary marine and nonmarine climatic trends. Pp. 154–158In Climate in Earth history. National Academy Press, Washington, D.C.Google Scholar
Woodbury, R. O., and Weaver, P. L. 1987. The vegetation of St. John and Hassel Island, U.S. Virgin Islands. Research/Resources Management Report SER-83:1–103. National Park Service, Southeast Regional Office, Atlanta.Google Scholar
Zachos, J. C., Stott, L. D., and Lohmann, K. C. 1994. Evolution of early Cenozoic marine temperatures. Paleoceanography 9:353–387.CrossRefGoogle Scholar