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The California State University


  • Badel, E., F. Ewers, H. Cochard and F. Telewski. 2015. Acclimation of mechanical and hydraulic functions in trees. Frontiers in Plant Science 6: 266-293.

  • Montes, M., F. Ewers and E. Bobich. 2015. GELATINOUS FIBRES ARE NOT PRODUCED IN RESPONSE TO INDUCED STRESSES IN EPHEDRA. Iawa Journal 36: 121-137.

  • Lopez-Portillo, J., F. Ewers, R. Mendez-Alonzo, C. Lopez, G. Angeles, A. Jimenez, A. Lara-Dominguez and M. Barrera. 2014. DYNAMIC CONTROL OF OSMOLALITY AND IONIC COMPOSITION OF THE XYLEM SAP IN TWO MANGROVE SPECIES. American Journal of Botany 101: 1013-1022.

  • Caringella, M., B. Bergman, R. Stanfield, M.M. Ewers, E.G. Bobich and F.W. Ewers. 2014. Effects of phyllotaxy on biomechanical properties of stems of Cercis Occidentalis (Fabaceae). American Journal of Botany 101: 206-210.

  • Paddock III, W., S.D. Davis, R.B. Pratt, A.L. Jacobsen, M.F. Tobin, J. Lopez-Portillo and F.W. Ewers. 2013. Factors determining mortality of adult chaparral shrubs in an extreme drought year in California. Aliso 31: 49-57.

  • Mendez-Alonzo, R., F. Ewers, L. Sack and N. Anten. 2013. Ecological variation in leaf biomechanics and its scaling with tissue structure across three mediterranean-climate plant communities. Functional Ecology 27: 544-554.

  • Pratt, R., A. Jacobsen, J. Hernandez, F. Ewers, G. North and S. Davis. 2012. ALLOCATION TRADEOFFS AMONG CHAPARRAL SHRUB SEEDLINGS WITH DIFFERENT LIFE HISTORY TYPES (RHAMNACEAE). American Journal of Botany 99: 1464-1476.

  • Jacobsen, A., R. Pratt, M. Tobin, U. Hacke and F. Ewers. 2012. GLOBAL ANALYSIS OF XYLEM VESSEL LENGTH IN WOODY PLANTS. American Journal of Botany 99: 1583-1591.

  • Pratt, R., G. North, A. Jacobsen, F. Ewers and S. Davis. 2010. Xylem root and shoot hydraulics is linked to life history type in chaparral seedlings. Functional Ecology: 70-81.

  • Utsumi, Y., E. Bobich and F. Ewers. 2010. Photosynthetic, hydraulic and biomechanical responses of Juglans californica shoots to wildfire. OECOLOGIA: 331-338.


  • Pratt, R.B., G.B. North, A.L. Jacobsen, F.W. Ewers and S.D. Davis. 2009. Xylem root and shoot hydraulics is linked to life history type in chaparral seedlings. Functional Ecology.

  • Jacobsen, A.L., K.J. Esler, R.B. Pratt and F.W. Ewers. 2009. Water stress tolerance of shrubs in Mediterranean-type climate region shrubs: Convergence of fynbos and succulent karoo communities with California shrub communities. American Journal of Botany 96: 1445–1453.

  • Jacobsen, A., R. Pratt, S. Davis and F. Ewers. 2008. Comparative community physiology. New Phytologist: 100-113.

  • Jacobsen, A., L. Agenbag, K. Esler, R. Pratt, F. Ewers and S. Davis. 2007. Xylem density, biomechanics and anatomical traits correlate with water stress in 17 evergreen shrub species of the Mediterranean-type climate region of South Africa. Journal of Ecology: 171-183.

  • Jacobsen, A., R. Pratt, F. Ewers and S. Davis. 2007. Cavitation resistance among 26 chaparral species of southern California. Ecological Monographs: 99-115.

  • Jacobsen, A., R. Pratt, S. Davis and F. Ewers. 2007. Cavitation resistance and seasonal hydraulics differ among three arid Californian plant communities. Plant Cell and Environment: 1599-1609.

  • Ewers, F., J. Ewers, A. Jacobsen and J. Lopez-Portillo. 2007. Vessel redundancy. IAWA Journal: 373-388.

  • Olmstead, M., N. Lang, G. Lang, F. Ewers and S. Owens. 2006. Examining the vascular pathway of sweet cherries grafted onto dwarfing rootstocks. Hortscience: 674-679.

  • Olmstead, M., N. Lang, F. Ewers and S. Owens. 2006. Xylem vessel anatomy of sweet cherries grafted onto dwarfing and nondwarfing rootstocks. Journal of the American Society for Horticultural Science: 577-585.

  • Jacobsen, A., F. Ewers, R. Pratt, W. Paddock and S. Davis. 2005. Do xylem fibers affect vessel cavitation resistance? Plant Physiology 139: 546-556.

  • Kern, K., F. Ewers, F. Telewski and L. Koehler. 2005. Mechanical perturbation affects conductivity, mechanical properties and aboveground biomass of hybrid poplars. Tree Physiology: 1243-1251.

  • Lopez-Portillo, J., F. Ewers and G. Angeles. 2005. Sap salinity effects on xylem conductivity in two mangrove species. Plant Cell and Environment: 1285-1292.

  • Angeles, G., B. Bond, J. Boyer, T. Brodribb, J. Brooks, M. Burns, J. Cavender-Bares, M. Clearwater, H. Cochard and J. Comstock. 2004. Cohesion-Tension theory. New Phytologist: 451-452.

  • Ewers, F., J. Lopez-Portillo, G. Angeles and J. Fisher. 2004. Hydraulic conductivity and embolism in the mangrove tree Laguncularia racemosa. Tree Physiology: 1057-1062.

  • Woodrum, C., F. Ewers and F. Telewski. 2003. Hydraulic, biomechanical, and anatomical interactions of xylem from five species of Acer (Aceraceae). American Journal of Botany: 693-699.

  • Ewers, F., M. Lawson, T. Bowen and S. Davis. 2003. Freeze/thaw stress in Ceanothus of southern California chaparral. Oecologia (Berlin): 213-219.

  • Davis, S., F. Ewers, J. Sperry, K. Portwood, M. Crocker and G. Adams. 2002. Shoot dieback during prolonged drought in Ceanothus (Rhamnaceae) chaparral of California. American Journal of Botany: 820-828.

  • Jaquish, L. and F. Ewers. 2001. Seasonal conductivity and embolism in the roots and stems of two clonal ring-porous trees, Sassafras albidum (Lauraceae) and Rhus typhina (Anacardiaceae). American Journal of Botany: 206-212.

  • Ameglio, T., F. Ewers, H. Cochard, M. Martignac, M. Vandame, C. Bodet and P. Cruiziat. 2001. Winter stem xylem pressure in walnut trees. Tree Physiology: 387-394.

  • Ameglio, T., H. Cochard and F. Ewers. 2001. Stem diameter variations and cold hardiness in walnut trees. Journal of Experimental Botany: 2135-2142.

  • Ewers, F., T. Ameglio, H. Cochard, F. Beaujard, M. Martignac, M. Vandame, C. Bodet and P. Cruiziat. 2001. Seasonal variation in xylem pressure of walnut trees. Tree Physiology: 1123-1132.

  • Tibbetts, T. and F. Ewers. 2000. Root pressure and specific conductivity in temperate lianas. American Journal of Botany: 1272-1278.

  • Davis, S., F. Ewers, J. Wood, J. Reeves and K. Kolb. 1999. Differential susceptibility to xylem cavitation among three pairs of Ceanothus species in the Transverse Mountain Ranges of southern California. Ecoscience: 180-186.

  • Owens, S., P. Fields and F. Ewers. 1998. Degradation of the upper pulvinus in modern and fossil leaves of Cercis (Fabaceae). American Journal of Botany: 273-284.

  • Boorse, G., F. Ewers and S. Davis. 1998. Response of chaparral shrubs to below-freezing temperatures. American Journal of Botany: 1224-1230.

  • Wagner, K., F. Ewers and S. Davis. 1998. Tradeoffs between hydraulic efficiency and mechanical strength in the stems of four co-occurring species of chaparral shrubs. Oecologia (Berlin): 1-2.

  • Fisher, J., G. Angeles-A, F. Ewers and J. Lopez-Portillo. 1997. Survey of root pressure in tropical vines and woody species. International Journal of Plant Sciences: 44-50.

  • Bosela, M. and F. Ewers. 1997. mode of origin of root buds and root sprouts in the clonal tree Sassafras albidum (Lauraceae). American Journal of Botany: 1466-1481.

  • Owens, S. and F. Ewers. 1997. Experimentally induced changes in bud fates in Cercis canadensis L. (Fabaceale). International Journal of Plant Sciences 158: 525-536.

  • Ewers, F., M. Carlton, J. Fisher, K. Kolb and M. Tyree. 1997. Vessel diameters in roots versus stems of tropical lianas and other growth forms. IAWA Journal: 261-279.

  • Fisher, J. and F. Ewers. 1995. Vessel dimensions in liana and tree species of Gnetum (Gnetales). American Journal of Botany 82: 1350-1357.

  • Ewers, F., G. North and P. Nobel. 1992. Root-stem junctions of a desert monocotyledon and a dicotyledon. New Phytologist 121: 377-385.

  • Tyree, M. and F. Ewers. 1991. Tansley Review No. 34 The hydraulic architecture of trees and other woody plants. New Phytologist 119: 345-360.

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Educational Background

  • 1982 – Ph.D., University of California, Berkeley (Botany)

  • 1976 – B.S., University of Wisconsin, Madison (Botany)

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Collaborators, Advisors & Advisees

  • Angeles, G – INECOL, Mexico

  • Bobich, E – Cal Poly Pomona

  • Davis, S – Pepperdine University

  • Jacobsen, A – CSU Bakersfield

  • Lopez-Portillo, J – INECOL Mexico

  • Mendez Alonzo, R – INECOL Xalapa, MEXICO

  • Pratt, R – CSU Bakersfield

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