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The hydraulic efficiency-safety trade-off differs between lianas and trees

Title data

van der Sande, Masha T. ; Poorter, Lourens ; Schnitzer, Stefan A. ; Engelbrecht, Bettina ; Markesteijn, Lars:
The hydraulic efficiency-safety trade-off differs between lianas and trees.
In: Ecology. Vol. 100 (May 2019) Issue 5 . - e02666.
ISSN 0012-9658
DOI: https://doi.org/10.1002/ecy.2666

Abstract in another language

Hydraulic traits are important for woody plant functioning and distribution. Associations among hydraulic traits, other leaf and stem traits, and species’ performance are relatively well understood for trees, but remain poorly studied for lianas. We evaluated the coordination among hydraulic efficiency (i.e., maximum hydraulic conductivity), hydraulic safety (i.e., cavitation resistance), a suite of eight morphological and physiological traits, and species’ abundances for saplings of 24 liana species and 27 tree species in wet tropical forests in Panama. Trees showed a strong trade-off between hydraulic efficiency and hydraulic safety, whereas efficiency and safety were decoupled in lianas. Hydraulic efficiency was strongly and similarly correlated with acquisitive traits for lianas and trees (e.g., positively with gas exchange rates and negatively with wood density). Hydraulic safety, however, showed no cor- relations with other traits in lianas, but with several in trees (e.g., positively with leaf dry mat- ter content and wood density and negatively with gas exchange rates), indicating that in lianas hydraulic efficiency is an anchor trait because it is correlated with many other traits, while in trees both efficiency and safety are anchor traits. Traits related to shade tolerance (e.g., low specific leaf area and high wood density) were associated with high local tree sapling abun- dance, but not with liana abundance. Our results suggest that different, yet unknown mecha- nisms determine hydraulic safety and local-scale abundance for lianas compared to trees. For trees, the trade-off between efficiency and safety will provide less possibilities for ecological strategies. For lianas, however, the uncoupling of efficiency and safety could allow them to have high hydraulic efficiency, and hence high growth rates, without compromising resistance to cavitation under drought, thus allowing them to thrive and outperform trees under drier conditions.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER151798
Keywords: P50; Panama; Drought tolerance; Functional traits; Hydraulic architecture; Hydraulic conductivity; Lianas; Plant-water relations; Species abundance; Tropical forest
Institutions of the University: Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Professor Plant Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Professor Plant Ecology > Professor Plant Ecology - Univ.-Prof. Dr. Bettina Engelbrecht
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 570 Life sciences, biology
500 Science > 580 Plants (Botany)
Date Deposited: 28 Jan 2020 09:55
Last Modified: 28 Jan 2020 09:55
URI: https://eref.uni-bayreuth.de/id/eprint/53905