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| Titel |
Fog interception by Ball moss (Tillandsia recurvata) |
| VerfasserIn |
A. Guevara-Escobar, M. Cervantes-Jiménez, H. Suzán-Azpiri, E. González-Sosa, L. Hernández-Sandoval, G. Malda-Barrera, M. Martínez-Díaz |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 8 ; Nr. 15, no. 8 (2011-08-12), S.2509-2518 |
| Datensatznummer |
250012923
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| Publikation (Nr.) |
 copernicus.org/hess-15-2509-2011.pdf |
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| Zusammenfassung |
| Interception losses are a major influence in the water yield of vegetated
areas. For most storms, rain interception results in less water reaching the
ground. However, fog interception can increase the overall water storage
capacity of the vegetation and once the storage is exceeded, fog drip is a
common hydrological input. Fog interception is disregarded in water budgets
of semiarid regions, but for some plant communities, it could be a mechanism
offsetting evaporation losses. Tillandsia recurvata is a
cosmopolitan epiphyte adapted to arid habitats where fog may be an important
water source. Therefore, the interception storage capacity by
T. recurvata was measured in controlled conditions and applying
simulated rain or fog. Juvenile, vegetative specimens were used to determine
the potential upperbound storage capacities. The storage capacity was
proportional to dry weight mass. Interception storage capacity (Cmin)
was 0.19 and 0.56 mm for rainfall and fog respectively. The
coefficients obtained in the laboratory were used together with biomass
measurements for T. recurvata in a xeric scrub to calculate the
depth of water intercepted by rain. T. recurvata contributed 20 % to
the rain interception capacity of their shrub hosts: Acacia farnesiana
and Prosopis laevigata and; also potentially intercepted
4.8 % of the annual rainfall. Nocturnal stomatic opening in T. recurvata
is not only relevant for CO2 but for water vapor,
as suggested by the higher weight change of specimens wetted with fog for 1
h at dark in comparison to those wetted during daylight (543 ± 77
vs. 325 ± 56 mg, p = 0.048). The storage capacity of
T. recurvata leaf surfaces could increase the amount of water
available for evaporation, but as this species colonise montane forests, the
effect could be negative on water recharge, because potential storage
capacity is very high, in the laboratory experiments it took up to 12 h
at a rate of 0.26 l h−1 to reach saturation conditions
when fog was applied. |
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