RT info:eu-repo/semantics/article
T1 Fog mitigates the consequences of a profligate water use strategy in a Macaronesian cloud forest tree species.
A1 Ritter Rodríguez, Axel
A1 Regalado Regalado, Carlos M.
A2 Ingeniería Agraria y del Medio Natural
K1 Canary Islands
K1 Climate change
K1 Fog
K1 Laurisilva
K1 Nocturnal fluxes
K1 Radial sap flow profile
K1 Stratocumulus cloud layer
K1 Subtropical forest
K1 Transpiration
AB How plants thrive in a cloud immersed environment where leaves are intermittently wet and the environmentalconditions that drive transpiration and growth are limited, raises a relevant question in fog affected ecosystems.In order to provide insight into how cloud immersion and fog interception may affect Macaronesian laurisilvaforests, micrometeorological variables, artificial fog water collection, throughfall, soil water content and thealtitude of the trade wind inversion layer, together with the hourly sap flow, Qt, of a dominant tree species,Myrica faya, were measured at an exposed site of the Anaga Massif Rural Park Biosphere Reserve (Tenerife,Canary Islands) over a period of one year. Foggy conditions led to a 45.1% reduction in global radiation and amore than a 10-fold decrease in sap flow, throughout all day hours. M. faya showed a weak control of thetranspiration rate and a profligate water use strategy, such that a substantial night-time sap flow, Qtn, wasobserved under high nocturnal atmospheric evaporative demand, representing 23.3% of the total daily Qt, eventhough fog was more frequent at night. Fog water interception resulted in canopy wetting and dripping for atleast 55.0% of the time, and an associated downward xylematic sap transport in the most apical branches, i.e. infoliar water uptake. This represented 4.0% of the upward sap flow and was observed in 26.7% of the hourly Qtrecords. Nocturnal transpiration was also enhanced by the entry of previous foliar moisture. This general plantand climatic phenomenology was related at the mesoscale with the trade wind inversion height in the subtropicalMacaronesia area.
SN 1879-2707
YR 2021
FD 2021
LK http://riull.ull.es/xmlui/handle/915/40960
UL http://riull.ull.es/xmlui/handle/915/40960
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 24-may-2025