Dew and its effect on two heliophile understorey species of a tropical dry deciduous forest in Mexico

Barradas, Vı́ctor L.; Glez-Medellín, M. Guadalupe

doi:10.1007/s004840050109

Cited by 48 publications

(49 citation statements)

References 16 publications

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“…Dew combined with rainfall as water input met the ET demand at our study site, thus maintaining the growth of desert woody plants. In our study dew increased from July to October, whereas ET decreased during this period, indicating that transpiration was decreasing in contrast to the pattern observed with dew [62].…”

Section: Contribution Of Dew To the Water Balancecontrasting

confidence: 82%

Dynamics of Dew in a Cold Desert-Shrub Ecosystem and Its Abiotic Controls

et al. 2016

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Abstract:The temporal dynamics of dew formation in cold desert-shrub ecosystems are still poorly understood. We examined dew and its abiotic controls in a shrubland in northwestern China with continuous eddy-covariance measurements of latent heat fluxes gathered over the growing-season of 2012. The dew amount was larger in mid-summer than in spring and autumn, but the dew duration was shorter in summer (from~10:00 p.m. to~6:30 a.m.) than in spring and autumn (from~8:30 p.m. to~7:30 a.m.). Dew occurred on 85% (166 days) of growing-season days, with monthly means ranging from 0.09 to 0.16 mm day´1. Dew was dominantly and positively controlled by Relative Humidity (RH), which explained 89% of its variation. Soil heat flux (G), air temperature (T a ), wind speed (W s ), Soil Water Content (SWC) and Vapor Pressure Deficit (VPD) also influenced dew formation. The most favorable conditions for dew formation were at T a < 17˝C and RH > 75%. The Penman-Monteith equation predicted actual dew reasonably well. The predicted growing-season dew amount (21.3 mm) was equivalent to 7.2% and 8.9% of corresponding rainfall and evapotranspiration, respectively. It is suggested that dew could be a stable and continuous source of water that helps desert plants survive during warm summers.

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Section: Contribution Of Dew To the Water Balancecontrasting

confidence: 82%

Dynamics of Dew in a Cold Desert-Shrub Ecosystem and Its Abiotic Controls

et al. 2016

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“…By increasing nocturnal temperatures (Janssen & Römer, 1991;Lloyd, 1961;Price, Michaelides, Pashiardis, & Alpert, 1999;Scherm & van Bruggen, 1993), RH is decreased (Barradas & Glez-Medellín, 1999), resulting in the impediment of vapour condensation (Brunnenberg & Kühn, 1977;Hicks, 1983;Lloyd, 1961;Zangvil, 1996;Zangvil & Druian, 1980). By increasing nocturnal temperatures (Janssen & Römer, 1991;Lloyd, 1961;Price, Michaelides, Pashiardis, & Alpert, 1999;Scherm & van Bruggen, 1993), RH is decreased (Barradas & Glez-Medellín, 1999), resulting in the impediment of vapour condensation (Brunnenberg & Kühn, 1977;Hicks, 1983;Lloyd, 1961;Zangvil, 1996;Zangvil & Druian, 1980).…”

Section: Figurementioning

confidence: 99%

Measurements and ecological implications of non‐rainfall water in desert ecosystems—A review

Kidron

Starinsky

2019

Ecohydrology

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The current review focuses on the contribution of non-rainfall water (NRW) to arid and semiarid regions (with a focus on the Negev), where NRW may provide a constant source of water that may facilitate the survival of different organisms, especially microorganisms. Factors that determine the amounts of NRW and the contribution of NRW to plants and organisms are discussed. Nevertheless, although important, significant variation exists regarding the amounts of NRW, which may stem from improper use or inherent drawbacks of some of the measurement devices. This may lead to erroneous conclusions regarding the possible role played by NRW. For instance, with prokaryotes (bacteria and cyanobacteria) requiring liquid water (≥0.1 mm) for growth, small inaccuracies in NRW around this threshold may either lead to the conclusion that NRW is sufficiently high to facilitate their growth, or rather, is too low to facilitate their growth. Arguing that some of the devices used to measure NRW may greatly overestimate the amounts, the possible contribution of NRW to soil bacteria and cyanobacterial biocrusts is analysed. We suggest that although NRW may assist the growth and survival of mosses and some types of lichens (mostly non-crustose), no conclusive findings were thus far reported regarding the use of dew for cyanobacteria growth. The use of dew by cyanobacterial crust for growth should be critically examined, and the possibility that NRW may even result in a negative carbon balance for cyanobacterial crusts should be considered.

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“…Also, throughout the dry season they show asynchrony in the leaf phenology compared to the rest of the community, owing to distinctive anatomical and physiological traits (Barradas and Glez-Medellin, 1999). Their crassulacean acid metabolism (CAM), is characterized by the stomatic absorption of CO 2 during darkness, as well as restricted water lost from transpiration (Nobel, 1983).…”

Section: Introductionmentioning

confidence: 99%

Fog interception by Ball moss (<i>Tillandsia recurvata</i>)

Guevara-Escobar

Cervantes-Jiménez

Suzán-Azpiri

et al. 2011

Hydrol. Earth Syst. Sci.

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Abstract. 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 (C min ) 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 CO 2 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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Dew and its effect on two heliophile understorey species of a tropical dry deciduous forest in Mexico

Cited by 48 publications

References 16 publications

Dynamics of Dew in a Cold Desert-Shrub Ecosystem and Its Abiotic Controls

Dynamics of Dew in a Cold Desert-Shrub Ecosystem and Its Abiotic Controls

Measurements and ecological implications of non‐rainfall water in desert ecosystems—A review

Fog interception by Ball moss (<i>Tillandsia recurvata</i>)

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Dew and its effect on two heliophile understorey species of a tropical dry deciduous forest in Mexico

Cited by 48 publications

References 16 publications

Dynamics of Dew in a Cold Desert-Shrub Ecosystem and Its Abiotic Controls

Dynamics of Dew in a Cold Desert-Shrub Ecosystem and Its Abiotic Controls

Measurements and ecological implications of non‐rainfall water in desert ecosystems—A review

Fog interception by Ball moss (&lt;i&gt;Tillandsia recurvata&lt;/i&gt;)

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Fog interception by Ball moss (<i>Tillandsia recurvata</i>)