California State University Bakersfield


Welcome to the Webpage of

Dr. Anna L. Jacobsen


Plant Ecology and Evolutionary Biology

Plant Structure-Function


Dr. Jacobsen's Homepage               Research Page             Research Methods Page


Selected Publications:



Hacke UG, Venturas MD, MacKinnon ED, Jacobsen AL, Sperry JS, Pratt RB. 2014. The standard centrifuge method accurately measures vulnerability to cavitation curves of long-vesselled olive stems. New Phytologist, in press.

MacKinnon ED, Pratt RB, Jacobsen AL. 2014. Functional trait differences between weedy and non-weedy plants in southern California. Madroño in press.

Jacobsen AL, Pratt RB, Davis SD, Tobin MF. 2014. Geographic and seasonal variation in chaparral vulnerability to cavitation. Madroño in press.

Pratt RB, Jacobsen AL, Ramirez AR, Helms AM, Traugh CA, Tobin MF, Heffner MS, Davis SD. 2014. Mortality of resprouting chaparral shrubs after a fire and during a record drought: physiological mechanisms and demographic consequences. Global Change Biology 20: 893-907. global change biology

Marais KE, Pratt RB, Jacobs SM, Jacobsen AL, Esler KJ. 2014. Postfire regeneration of resprouting mountain fynbos shrubs: differentiating obligate resprouters and facultative seeders. Plant Ecology 215:195-208. pdf



Paddock III WAS, Davis SD, Pratt RB, Jacobsen AL, Tobin MF, López-Portillo J, Ewers FW. 2013.  Factors determining mortality of adult chaparral shrubs in an extreme drought year in California.  Aliso 31: 49-57. pdf

Tobin MF, Pratt RB, Jacobsen AL, De Guzman M. 2013. Xylem vulnerability to cavitation can be accurately characterized in species with long vessels using a centrifuge method. Plant Biology 15: 496-504. pdf S1 S2 S3

Jacobsen AL, Pratt RB. 2013. Vulnerability to cavitation of central California Arctostaphylos (Ericaceae): A new analysis. Oecologia 171:329-334. pdf (including supplement)



Jacobsen AL, Pratt RB, Tobin MF, Hacke UG, Ewers FW. 2012. A global analysis of xylem vessel length in woody plants. American Journal of Botany 99: 1583-1591. pdf  supplement

Choat B, Jansen S, Brodribb TJ, Cochard H, Delzon S, Bhaskar R, Bucci SJ, Feild TS, Gleason SM, Hacke UG, Jacobsen AL, Lens F, Maherali H, Martínez-Vilalta J, Mayr S, Mencuccini M, Mitchell PJ, Nardini A, Pittermann J, Pratt RB, Sperry JS, Westoby M, Wright IJ, Zanne AE. 2012. Global convergence in the vulnerability of forest to drought.  Nature 491: 752-756. pdf

Hacke UG, Jacobsen AL, Pratt RB, Maurel C, Lachenbruch B, Zwaizek J. 2012. New research on plant-water relations examines the molecular, structural, and physiological mechanisms of plant responses to their environment. New Phytologist 196: 345-348. pdf

Pratt RB, Jacobsen AL, Hernandez J, Ewers FW, North GB, Davis SD. 2012. Allocation tradeoffs among chaparral shrub seedlings with different life history types (Rhamnaceae). American Journal of Botany 99: 1464-1476. pdf

Jacobsen AL, Pratt RB. 2012. No evidence for an open vessel effect in centrifuge-based vulnerability curves of a long-vesselled liana (Vitis vinifera). New Phytologist 194: 982-990. pdf

Ramirez AR, Pratt RB, Jacobsen AL, Davis SD. 2012. Exotic deer diminish post-fire resilience of native shrub communities on Santa Catalina Island, southern California.  Plant Ecology 213: 1037-1047. pdf

Pratt RB, Jacobsen AL, Jacobs SM, Esler KJ. 2012. Xylem transport safety and efficiency differs among fynbos shrub life history types and between two sites differing in mean rainfall. Int. J. Plant Sci. 173: 474-483. pdf  cover image (photo by AL Jacobsen)

Jacobsen AL, Roets F, Jacobs SM, Esler KJ, Pratt RB. 2012. Dieback and mortality of South African fynbos shrubs is likely driven by a novel pathogen and pathogen-induced hydraulic failure.  Austral Ecology 37: 227-235. pdf



Pratt RB, North GB, Jacobsen AL, Ewers FW, Davis SD. 2010. Xylem root and shoot hydraulics is linked to life history type in chaparral seedlings.  Functional Ecology 24: 70-81. pdf



Jacobsen AL, Pratt RB, Moe LM, Ewer FW. 2009 Plant community water use and invasibility of semi-arid shrublands by woody species in southern California. Madroño 56: 213-220. pdf

Hacke UG, Jacobsen AL, Pratt RB. 2009. Xylem function of arid-land shrubs from California, USA: an ecological and evolutionary analysis. Plant, Cell & Environment 32: 1324-1333. pdf

Jacobsen AL, Esler KJ, Pratt RB, Ewers FW. 2009. Water stress tolerance of shrubs in Mediterranean-type climate regions: Convergence of fynbos and succulent karoo communities with California shrub communities. American Journal of Botany 96: 1445-1453. pdf



Pratt RB, Jacobsen AL, Mohla R, Ewers FW, Davis SD. 2008. Linkage between water stress tolerance and life history type in seedlings of nine chaparral species (Rhamnaceae). Journal of Ecology 96: 1252-1265. pdf

Jacobsen AL, Pratt RB, Davis SD, Ewers FW. 2008. Comparative community physiology: non-convergence in water relations among three semi-arid shrub communities.  New Phytologist 180: 100-113. pdf

Pratt RB, Jacobsen AL, North GB, Sack L, Schenk HJ. 2008. Plant hydraulics: new discoveries in the pipeline. New Phytologist 179: 590-593. pdf



Ewers FW, Ewers JM, Jacobsen AL, López-Portillo J.  2007. Vessel redundancy: modeling safety in numbers. IAWA Journal 28: 373-388. pdf

Jacobsen AL, Pratt RB, Davis SD, Ewers FW. 2007. Cavitation resistance and seasonal hydraulics differ among three arid Californian plant communities.  Plant, Cell and Environment 30: 1599-1609. pdf

Davis SD, Pratt RB, Ewers FW, Jacobsen AL. 2007. Freezing tolerance impacts chaparral species distribution in the Santa Monica Mountains.  (In Flora and Ecology of the Santa Monica Mountains. Ed. Knapp DA. Southern California Botanists Special Publication No. 4, Fullerton, CA). pp. 159-172. pdf

Pratt RB, Jacobsen AL, Ewers FW, Davis SD. 2007. Relationships among xylem transport, biomechanics, and storage in stems and roots of nine Rhamnaceae species of the California chaparral. New Phytologist 174: 787-798. pdf

Pratt RB, Jacobsen AL, Golgotiu KA, Sperry JS, Ewers FW, Davis SD. 2007. Life history type coupled to water stress tolerance in nine Rhamnaceae species of the California chaparral.  Ecological Monographs 77: 239-253. pdf

Jacobsen AL, Pratt RB, Ewers FW, Davis SD.  2007.  Cavitation resistance among twenty-six chaparral species of southern California.  Ecological Monographs 77: 99-115. pdf

Jacobsen AL, Agenbag L, Esler KJ, Pratt RB, Ewers FW, Davis SD.  2007.  Xylem density, biomechanics, and anatomical traits correlate with water stress in seventeen evergreen shrub species of the Mediterranean-type climate region of South Africa.  Journal of Ecology 95: 171-183. pdf



Jacobsen AL, Ewers FW, Pratt RB, Paddock WA III, Davis SD. 2005.  Do xylem fibers affect vessel cavitation resistance? Plant Physiology 139: 546-556. pdf

Pratt RB, Ewers FW, Lawson MC, Jacobsen AL, Brediger M, and Davis SD. 2005. Mechanisms for tolerating freeze-thaw stress of two evergreen chaparral species: Rhus ovata and Malosma laurina (Anacardiaceae). American Journal of Botany 92: 1102-1113. pdf



Jacobsen AL, Fabritius SL and Davis SD. 2004. Fire frequency impacts non-sprouting chaparral shrubs in the Santa Monica Mountains of southern California. (In Ecology, Conservation and Management of Mediterranean Climate Ecosystems.  Eds. Arianoutsou M and Papanastasis VP.  Millpress, Rotterdam, Netherlands). pdf



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Research Page 

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