Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1002/ecy.2666
Lizenz creative commons licence
Titel (primär) The hydraulic efficiency–safety trade‐off differs between lianas and trees
Autor van der Sande, M.T.; Poorter, L.; Schnitzer, S.A.; Engelbrecht, B.M.J.; Markesteijn, L.
Quelle Ecology
Erscheinungsjahr 2019
Department BZF; iDiv
Band/Volume 100
Heft 5
Seite von e02666
Sprache englisch
Keywords drought tolerance ; functional traits ; hydraulic conductivity ; hydraulic architecture ; plant‐water relations ; lianas ; Panama ; P50 ; species abundance ; tropical forest
Abstract 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 8 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 correlations with other traits in lianas, but with several in trees (e.g. positively with leaf dry matter 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 abundance, but not with liana abundance. Our results suggest that different, yet unknown mechanisms 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.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=21670
van der Sande, M.T., Poorter, L., Schnitzer, S.A., Engelbrecht, B.M.J., Markesteijn, L. (2019):
The hydraulic efficiency–safety trade‐off differs between lianas and trees
Ecology 100 (5), e02666 10.1002/ecy.2666