Typically, access is provided across an institutional network to a range of IP addresses. If you are a member of an institution with an active account, you may be able to access content in one of the following ways: Get help with access Institutional accessĪccess to content on Oxford Academic is often provided through institutional subscriptions and purchases. Our findings assist predictions of oak drought resistance with future climate changes for oak forest management. Our study suggests that stem hydraulic conductivity and embolism resistance in Quercus species is shaped by their climate niche. Ks negatively related to the humidity of the native range of the ten Asian oaks, but showed no trend when assessing the entire global oak dataset. The oak species that can distribute in arid habitats possessed a stem xylem with high embolism resistance. No significant difference in P 50 between the two groups was found for the ten Asian oaks or the 41-oak dataset. Ks differed significantly between the two phenological groups (deciduous and evergreens) in the 41-oak dataset. The deciduous and evergreen species of the ten Asian oaks differed in the stem and leaf traits related to hydraulic efficiency. Our results revealed the ten Asian oak species, which are mainly distributed in humid subtropical habitats, possessed a stem xylem with low embolism resistance and moderate hydraulic efficiency. We analyzed the relationship between hydraulic traits and climatic factors over the native ranges of 41 oak species.
We also compiled four key functional traits: wood density, hydraulic weighted vessel diameter, Ks, and P 50 data for 31 oak species from previous literature. Ten common-garden grown oak species with distinct natural distributions in eastern Asia were used to determine their stem xylem embolism resistance (water potential at 50% loss of hydraulic conductivity, P 50), stem hydraulic efficiency (vessel anatomy and sapwood specific hydraulic conductivity ( Ks)), and leaf anatomical traits. However, the hydraulic adaptations of Asian oaks with their climate niches remains unclear.
Southwest China is considered as a biodiversity hotpot of the genus Quercus (oak). The hydraulic traits of a plant species may reflect its climate adaptations.
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