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dc.contributor.authorJacobsen, A.L.
dc.contributor.authorEsler, K.J.
dc.contributor.authorPratt, R.B.
dc.contributor.authorEwers, F.W.
dc.date.accessioned2010-11-22T11:51:06Z
dc.date.available2010-11-22T11:51:06Z
dc.date.issued2009
dc.identifier.citationJacobsen, A.L., Esler, K.J., Pratt, R.B. and Ewers, F.W. (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(8), 1445-1453en
dc.identifier.urihttp://hdl.handle.net/123456789/808
dc.description.abstractMediterranean-type climate regions are highly biodiverse and predicted to be particularly sensitive to climate change. Shrubs of the mediterranean-type climate region of South Africa are highly threatened, and their response to water stress has been comparatively little studied. Resistance to water stress induced xylem cavitation (P50) and xylem specifi c hydraulic conductivity (Ks) were measured in 15 shrub species from fynbos and succulent karoo communities of South Africa. Species displayed a fivefold variation in cavitation resistance (P50 of −1.9 to −10.3 MPa) with succulent karoo species displaying greater interspecific variability in P50 than fynbos species. Principal components analysis (including P50, minimum seasonal water potential, Ks, and xylem density) showed the response to water stress in fynbos species to be similar to chaparral species from the mediterranean-type climate region of California. The data suggest convergence of community and species-specific water stress “strategies” between these mediterranean-type climate regions with respect to their xylem traits. On the basis of the current study and reported plant death and dieback in these regions, woody species within the fynbos may be more susceptible to climate warming and drying than those within the succulent karoo that appear to be utilizing more diverse xylem strategies in response to water stress.en
dc.description.sponsorshipCentre of Excellence for Invasion Biologyen
dc.format.extent982595 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherBotanical Society of America, Inc.en
dc.subjectcavitation resistanceen
dc.subjectchaparralen
dc.subjectdioeciousen
dc.subjectfynbosen
dc.subjectmediterranean-type climateen
dc.subjectMojave Deserten
dc.subjectsucculent karooen
dc.subjectwater relationsen
dc.subjectxylem densityen
dc.titleWater stress tolerance of shrubs in Mediterranean-type climate regions: convergence of fynbos and succulent Karoo communities with California shrub communitiesen
dc.typeJournalArticlesen
dc.cibjournalAmerican Journal of Botanyen
dc.cibprojectNAen


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