(cover photo by R. Brandon Pratt)California State University Bakersfield
Welcome to the Webpage of
Dr. Anna L. Jacobsen
Plant Ecology and Evolutionary Biology
Plant Structure-Function
Publications
Dr. Jacobsen's Homepage Research Page Research Methods Page
Also see:
Selected Publications:
2024:
Jacobsen AL, Venturas MD, Hacke UG, Pratt RB. 2024. Sap flow through partially embolized xylem vessel networks. Plant, Cell & Environment 47: 3375-3392.
Long RW, Pratt RB, Jacobsen AL. 2024. Drought resistance in two populations of invasive Tamarix compared using multiple methods. Tree Physiology 44: tpad140.
2023:
Jacobsen AL. 2023. Growing whole plant understanding through study of below-ground structural diversity. Annals of Botany
Ennajeh M, Coleman M, Fickle JC, Castro V, Pratt RB, Jacobsen AL. 2023. Xylem structure and function of two saltbush shrub species (Atriplex) from differing microhabitats. Journal of Plant Ecology 16: rtad022 https://doi.org/10.1093/jpe/rtad022
Fickle JC, Pratt RB, Jacobsen AL. 2023. Xylem structure and hydraulic function in roots and stems of chaparral shrub species from high and low elevation in the Sierra Nevada, California. Physiologia Plantarum 175: e13970. https://doi.org/10.1111/ppl.13970
Parra A, Pratt RB, Jacobsen AL, Chamorro D, Torres I, Moreno JM. 2023. Functional response and resistance to drought in seedlings of six shrub species with contrasting leaf traits from the Mediterranean Basin and California. Tree Physiology. https://doi.org/10.1093/treephys/tpad079
Jacobsen AL, Pratt RB. 2023. Vessel diameter polymorphism determines vulnerability-to-embolism curve shape. IAWA Journal. Advanced Access.
Ewers FW, Jacobsen AL, López-Portillo J. 2023. Carlquist’s indices for vulnerability and mesomorphy of wood: Are they relevant today? IAWA Journal. Advanced Access.
Pratt RB, Castro V, Jacobsen AL. 2023. The functional significance of tracheids co-occurring with vessels in xylem of Eudicots suggests a role in embolism tolerance. IAWA Journal. Advanced Access.
Hacke UG, Jacobsen AL, Pratt RB. 2023. Vessel diameter and vulnerability to drought-induced embolism: within-tissue and across-species patterns and the issue of survivorship bias. IAWA Journal. Advanced Access.
2022:
Wu S, Al Dabagh R, Jacobsen AL, Holmlund H, Scalzo F. 2022. Deep learning-based classification of plant xylem tissue from light micrographs. Lecture Notes in Computer Science (LNCS) 13599. pdf
Valdovinos-Ayala J, Robles C, Fickle JC, Perez-de-Lis G, Pratt RB, Jacobsen AL. 2022. Seasonal patterns of increases in stem girth, vessel development, and hydraulic function in deciduous tree species. Annals of Botany 130: 355-365. pdf supplement
Fontes C, Pinto-Ledezma J, Jacobsen AL, Pratt RB, Cavender-Bares J. 2022. Adaptive variation among oaks in wood anatomical properties is shaped by climate of origin and shows limited plasticity across environments. Functional Ecology 36: 326-340.
2021:
Baer AB, Fickle JC, Medina J, Robles C, Pratt RB, Jacobsen AL. 2021. Xylem biomechanics, water storage, and density within roots and shoots of an angiosperm tree species. Journal of Experimental Botany 72: 7984-7997. pdf
Pratt RB, Jacobsen AL, Percolla MI, DeGuzman ME, Traugh CA, Tobin MF. 2021. Trade-offs among transport, support, and storage in xylem from shrubs in a semiarid chaparral environment tested with structural equation modeling. PNAS 118: e2104336118. pdf supplement
Percolla MI, Fickle JC, Rodriguez-Zaccaro RD, Pratt RB, Jacobsen AL. 2021. Hydraulic function and conduit structure in the xylem of five oak species. IAWA Journal 42: 279-298. pdf supplement
Jacobsen AL. 2021. Diversity in conduit and pit structure among extant gymnosperm taxa. American Journal of Botany 108: 559-570. pdf online appendix S1
Pratt RB, Tobin MF, Jacobsen AL, Traugh CA, De Guzman ME, Hayes CC, Toschi HS, MacKinnon ED, Percolla MI, Clem ME, Smith PT. 2021. Starch storage capacity of sapwood is related to dehydration avoidance during drought. American Journal of Botany 108: 91-101. pdf
Coleman ML,
Mayence CE, White MD, Jacobsen AL, Pratt RB. 2021. A
seed-seedling conflict for Atriplex polycarpa shrubs competing with exotic
grasses and their residual dry matter.
Ecosphere 12(4): e03455.
2020:
Kilgore JS, Jacobsen AL, Telewski FW. 2020. Hydraulics of Pinus (subsection Ponderosae) populations across an elevation gradient in the Santa Catalina Mountains of southern Arizona. Madroño 67: 218-226. pdf
Batllori E, Lloret F, Aakala T, Anderegg WRL, Aynekulu E, Bendixsen DP, Bentouati A, Bigler C, Burk CJ, Camerero JJ, Colangelo M, Coop JD, Fensham R, Floyd ML, Galiano L, Ganey JL, Gonzalez P, Jacobsen AL, Kane JM, Kitsberger T, Linares JC, Marchetti SB, Matusick G, Michaelian M, Navarro-Cerrillo RM, Pratt RB, Redmond MD, Rigling A, Ripullone F, Sangüesa-Barreda G, Sasal Y, Saura-Mas S, Suarez ML, Veblen TT, Vilá-Cabrera A, Vincke C, Zeeman B. 2020. Forest replacement patterns following drought-induced mortality worldwide. PNAS 117: 29720-29729.
Jacobsen AL, Fickle JC, Castro V, Madsen A, Ennajeh M, Pratt RB. 2020. Node frequency alters stem biomechanics and hydraulics in four deciduous woody species. Journal of Wood Science 66: 26. https://doi.org/10.1186/s10086-020-01873-4. pdf
Pratt RB, Castro V, Fickle JC, Madsen A, Jacobsen AL. 2020. Factors controlling drought resistance in grapevine (Vitis vinifera, chardonnay): application of a new microCT method for assessing functional cavitation resistance. American Journal of Botany 107: 618-627. pdf
Pratt RB, Castro V, Fickle JC, Jacobsen AL. 2020. Embolism resistance of different aged stems of a California oak species (Quercus douglasii): Optical and microCT methods differ from the benchtop-dehydration standard. Tree Physiology 40: 5-18. pdf supplement
(cover photo by R. Brandon Pratt)
2019:
Fettig CJ, Wuenschel A, Balachowski J, Butz RJ, Jacobsen AL, North MP, Ostoja SM, Pratt RB, Standiford RB. 2019. Managing effects of drought in California. Pp. 71-93 in Effects of drought on forests and rangelands in the United States. WO-GTR-98. pdf
Venturas MD, Pratt RB, Jacobsen AL, Castro V, Fickle JC, Hacke UG. 2019. Direct comparison of four methods to construct xylem vulnerability curves: differences among techniques are linked to vessel network characteristics. Plant, Cell & Environment 42: 2422- 2436. pdf supplement
Heaton EJ, Thompson G, Fetzer DA, Negrini RM, Wigand PE, Palacios-Fest MR, LaFever R, Jacobsen AL, Trigos C. 2019. A Great Basin lake-level response to 38-34 ka Dansgaard-Oeschger oscillations. Journal of Paleolimnology 61: 263-278. pdf
Méndez-Alonzo R, Ewers FW, Jacobsen AL, Pratt RB, Scoffoni C, Bartlett MK, Sack L. 2019. Covariation between leaf hydraulics and biomechanics is driven by leaf density in Mediterranean shrubs. Trees-Structure and Function 33: 507-519. pdf
Rodriguez-Zaccaro FD, Valdovinos-Ayala J, Percolla MI, Venturas MD, Pratt RB, Jacobsen AL. 2019. Wood structure and function change with maturity: Age of the vascular cambium is associated with xylem changes in current-year growth. Plant, Cell & Environment 42: 1816-1831. pdf supplement
Jacobsen AL, Pratt RB, Venturas MD, Hacke UG. 2019. Large volume vessels are vulnerable to water-stress-induced embolism in stems of poplar. IAWA Journal 40: 4-22. pdf supplement
Crous CJ, Drake DC, Jacobsen AL, Pratt RB, Jacobs SM, Esler KJ. 2019. Foliar nitrogen dynamics of an invasive legume compared to native non-legumes in fynbos riparian zones varying in water availability. Water SA 45: 103-109. pdf
Holmlund HI, Pratt RB, Jacobsen AL, Davis SD, Pittermann J. 2019. High-resolution computed tomography reveals dynamics of desiccation and rehydration in fern petioles of a desiccation-tolerant fern. New Phytologist 224: 97-105. pdf supplement
(cover photo by AL Jacobsen)
2018:
Jacobsen AL, Pratt RB. 2018. Going with the flow: Structural determinants of vascular tissue transport efficiency and safety. Plant, Cell & Environment 41: 2715-2717. pdf
Jacobsen AL, Valdovinos-Ayala J, Rodriguez-Zaccaro FD, Hill-Crim MA, Percolla MI, Venturas MD. 2018. Intra-organismal variation in the structure of plant vascular transport tissues in poplar trees. Trees - Structure and Function 32: 1335-1346. pdf S1 S2
Jacobsen AL, Pratt RB, Alleman D, Davis SD. 2018. Post-fire ecophysiology of endemic chaparral shrub seedlings from Santa Catalina Island, southern California. Madroño 65: 106-116. pdf
Jacobsen AL, Pratt RB. 2018. Extensive drought-associated plant mortality as an agent of type-conversion in chaparral shrublands. New Phytologist 219: 498-504. pdf supporting info
Pratt RB, Jacobsen AL. 2018. Identifying which conduits are moving water in woody plants: A new HRCT-based method. Tree Physiology 38: 1200-1212. pdf
Jacobsen AL, Valdovinos-Ayala J, Pratt RB. 2018. Functional lifespans of xylem vessels: development, hydraulic function, and post-function of vessels in several species of woody plants. American Journal of Botany 105: 142-150. pdf
[BOOK] Esler KJ, Jacobsen AL, Pratt RB. 2018. The Biology of Mediterranean-type Ecosystems. Oxford University Press. 336 pp.
(cover photos by R.
Brandon Pratt)
2017:
Pratt RB, Jacobsen AL. 2017. Conflicting demands on angiosperm xylem: tradeoffs among storage, transport, and biomechanics. Plant, Cell & Environment 40: 897-913. pdf
2016:
Jacobsen AL, Tobin MF, Toschi HS, Percolla MI, Pratt RB. 2016. Structural determinants of increased susceptibility to dehydration-induced cavitation in post-fire resprouting chaparral shrubs. Plant, Cell & Environment 39: 2473-2485. pdf supplement
Venturas MD, MacKinnon ED, Dario HL, Jacobsen AL, Pratt RB, Davis SD. 2016. Chaparral shrub hydraulic traits, size, and life history types relate to species mortality during California's historic drought of 2014. PLoS ONE 11(7): e0159145. pdf
Venturas MD, Rodriguez-Zaccaro FD, Percolla MI, Crous CJ, Jacobsen AL, Pratt RB. 2016. Single vessel air injection estimates of xylem resistance to cavitation are affected by vessel network characteristics and sample length. Tree Physiology 36: 1247-1259. pdf supporting info
Gleason SM, Westoby M, Jansen S, Choat B, Brodribb TJ, Cochard H, Delzon S, Hacke UG, Jacobsen AL, Johnson DM, Lens F, Maherali H, Martínez-Vilalta J, Mayr S, McCulloh KA, Morris H, Nardini A, Plavcová L, Pratt RB, Schreiber SG, Zanne AE. 2016. On research priorities to advance understanding of the safety-efficiency tradeoff in xylem. New Phytologist 211: 1156-1158. New Phytologist
Pausas JG, Pratt RB, Keeley JE, Jacobsen AL, Ramirez AR, Vilagrosa A, Paula S, Kanekua-Pia IN, Davis SD. 2016. Towards understanding resprouting at the global scale. New Phytologist 209: 945-954. pdf Table S1 (global P50 and resprouting database) supporting info
Gleason SM, Westoby M, Jansen S, Choat B, Hacke UG, Pratt RB, Bhaskar R, Brodribb TJ, Bucci SJ, Cao K-F, Cochard H, Delzon S, Domec J-C, Fan Z-X, Field TS, Jacobsen AL, Johnson DM, Lens F, Maherali H, Martínez-Vilalta J, Mayr S, McCulloh KA, Mencuccini M, Mitchell PJ, Morris H, Nardini A, Pittermann J, Plavcová L, Schreiber SG, Sperry JS, Wright IJ, Zanne AE. 2016. Weak tradeoff between xylem safety and xylem-specific hydraulic efficiency across the world’s woody plant species. New Phytologist 209: 123-136. pdf supporting info
2015:
Jacobsen AL, Rodriguez-Zaccaro FD, Lee TF, Valdovinos J, Toschi HS, Martinez JA, Pratt RB. 2015. Grapevine xylem development, architecture and function. (Pp. 133-162 In Functional and Ecological Xylem Anatomy. Ed. Hacke UG. Springer). pdf
Pratt RB, Percolla MI, Jacobsen AL. 2015. Integrative xylem analysis of chaparral shrubs. (Pp. 189-207 In Functional and Ecological Xylem Anatomy. Ed. Hacke UG. Springer). pdf
Venturas MD, MacKinnon ED, Jacobsen AL, Pratt RB. 2015. Excising stem samples under water at native tension does not induce xylem cavitation. Plant, Cell & Environment 38: 1060-1068. pdf supplement
Hacke UG, Venturas MD, MacKinnon ED, Jacobsen AL, Sperry JS, Pratt RB. 2015. The standard centrifuge method accurately measures vulnerability to cavitation curves of long-vesselled olive stems. New Phytologist 205: 116-127. pdf
Pratt RB, MacKinnon ED, Venturas MD, Crous CJ, Jacobsen AL. 2015. Root resistance to cavitation is accurately measured using a centrifuge technique. Tree Physiology 35: 185-196. pdf cover image
(cover photo by R.
Brandon Pratt)
2014:
MacKinnon ED, Pratt RB, Jacobsen AL. 2014. Functional trait differences between weedy and non-weedy plants in southern California. Madroño 61: 328-338. pdf
Jacobsen AL, Pratt RB, Davis SD, Tobin MF. 2014. Geographic and seasonal variation in chaparral vulnerability to cavitation. Madroño 61: 317-327. pdf
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. pdf
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
2013:
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)
2012:
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 S1 S2 S3
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, 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
(cover photo by AL Jacobsen)
2010:
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
2009:
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
2008:
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
2007:
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
2005:
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
2004:
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