| Research Articles |
|
|
|
|
| Effects of shrub species and microhabitats on dew formation in a revegetation-stabilized desert ecosystem in Shapotou, northern China |
| YanXia PAN, XinPing WANG |
| Shapotou Desert Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
|
|
|
Abstract Dew is an important supplement water source in arid and semi-arid areas. In order to determine the dew formation on different kinds of soils associated with various shrub species and microhabitats, we performed measurement of accumulated dew formation amount and duration in October 2009 in a revegetation-stabilized arid desert ecosystem in Shapotou area, northern China. The results indicated that the accumulated dew formation amount was four times larger at open spaces as compared to under the canopy, and it was nearly twice as much under living Artemisia ordosica plants (L.A.) as compared to under living Caragana korshinskii plants (L.C.). The opposite characteristics were found for dew duration between different microhabitats. Dew amounts at different vertical heights around the shrub stands were in the order of 50 cm above the canopy>the canopy edge>under the canopy. Dew amount continued to increase after dawn, and the proportion of average accumulated dew amount after dawn ac-counting for the average maximum amount increased from above the canopy to under the canopy. Dew formation duration after sunrise accounted for more than 50% of the total formation duration during the day time. Contrary to the distribution characteristics of dew amount, dew duration after dawn and total dew formation duration during the day time were both highest under the canopy, followed by at the canopy edge and then at 50 cm above the canopy. The portion of dew duration after dawn accounting for the total dew duration during the day time increased from above the canopy to under the canopy. From these results, we may conclude that dew availability as a supple-mental water resource for improving the microhabitats in water-limited arid ecosystems is position dependent es-pecially for the plant microhabitats at different stands layers.
|
|
Received: 16 November 2013
Published: 12 August 2014
|
| Fund: The National Natural Science Foundation of China (41201085) and the 100 Talents Program of the Chinese Academy of Sciences. |
|
Corresponding Authors:
XinPing WANG
E-mail: xpwang@lzb.ac.cn
|
|
|
| Agam N, Berliner P R. 2002. The role of dew in the water and heat balance of bare loess soil in the Negev Desert: quantifying the actual dew deposition on the soil surface. Atmosphere Research, 64(1−4): 323−334.Agam N, Berliner P R. 2006. Dew formation and water-vapour adsorption in semiarid environments: a review. Journal of Arid Environ-ments, 65: 572−590.Barradas V L, Glez-Medellin M G. 1999. Dew and its effect on two heliophile understorey species of a tropical dry deciduous forest in Mexico. International Journal of Biometeorology, 43: 1−7.Bourque C P A, Arp P A. 1994. Dawn-to-dusk evolution of air turbu-lence, temperature and sensible and latent heat fluxes above a forest canopy: concepts, model and field comparisons. Atmosphere-Ocean, 32(2): 299−334.Breshears D D, McDowell N G, Goddard K L, et al. 2008. Foliar absorption of intercepted rainfall improves woody plant water status most during drought. Ecology, 89(1): 41−47.Brown R, Mills A J, Jack C. 2008. Non-rainfall moisture inputs in the Knersvlakte: methodology and preliminary findings. Water SA, 34: 275−278.Del-Val E, Armesto J J, Barbosa O, et al. 2006. Rain forest islands in the Chilean semi-arid region: fog-dependency, ecosystem persistence and tree regeneration. Ecosystems, 9: 598−608.Gouvra E, Grammatikopoulos G. 2003. Beneficial effects of direct foliar water uptake on shoot water potential of five chasmophytes. Canadian Journal of Botany, 81(12): 1278−1284.Hao X M, Li C, Guo B, et al. 2012. Dew formation and its long-term trend in a desert riparian forest ecosystem on the eastern edge of the Taklimakan Desert in China. Journal of Hydrology, 472−473: 90−98.Jacobs A F G, van Pul A, El-Kilani R M M. 1994. Dew formation and the drying process within a maize canopy. Boundary-Layer Meteorology, 69: 367−378.Jacobs A F G, Nieveen J P. 1995. Formation of dew and the drying process within crop canopies. Meteorological Applications, 2: 249−256.Jacobs A F G, van Boxel J H, Nieveen J. 1996. Nighttime exchange processes near the soil surface of a maize canopy. Agricultural and Forest Meteorology, 82(1−4): 155−169.Jacobs A F G, Heusinkveld B G, Berkowicz S M. 2000. Dew meas-urements along a longitudinal sand dune transect, Negev Desert, Is-rael. International Journal of Biometeorology, 43(4): 184−190.Jacobs A F G, Heusinkveld B G, Klok E J. 2005. Leaf wetness within a lily canopy. Meteorological Applications, 12: 193−198. Kidron G J. 2005. Angle and aspect dependent dew and fog precipitation in the Negev desert. Journal of Hydrology, 301: 66−74. Kosmas C, Danalatos N G, Poesen J, et al. 1998. The effect of water vapour adsorption on soil moisture content under Mediterranean climatic conditions. Agricultural Water Management, 36: 157−168.Lekouch I, Muselli M, Kabbachi B, et al. 2011. Dew, fog, and rain as supplementary sources of water in south-western Morocco. Energy, 36(4): 2257−2265.Li X R, Kong D S, Tan H J, et al. 2007. Changes in soil and vegetation following stabilization of dunes in the southeastern fringe of the Tengger Desert, China. Plant and Soil, 300: 221−231.Li X Y. 2002. Effects of gravel and sand mulches on dew deposition in the semiarid region of China. Journal of Hydrology, 260: 151−160.Lloyd M G. 1961. The contribution of dew to the summer water budget of northern Idaho. Bulletin of the American Meteorological Society, 42: 572−580.Mao W, Zhang T H, Li Y L, et al. 2012. Allometric response of peren-nial Pennisetum centrasiaticum Tzvel to nutrient and water limitation in the Horqin Sand Land of China. Journal of Arid Land, 4(2): 161−170. Martin C E, Willert D J. 2000. Leaf epidermal hydathodes and the ecophysiological consequences of foliar water uptake in species of Crassula from the Namib Desert in southern Africa. Plant Biology, 2(2): 229−242.Moffett M W. 1985. An Indian ant’s novel method for obtaining water. National Geographic Research, 1(1): 146-149.Pan Y X, Wang X P. 2009. Factors controlling the spatial variability of surface soil moisture within revegetated-stabilized desert ecosystems of the Tengger Desert, Northern China. Hydrological Processes, 23(11): 1591−1601. Pan Y X, Wang X P, Zhang Y F. 2010. Dew formation characteristics in a revegetation-stabilized desert ecosystem in Shapotou area, Northern China. Journal of Hydrology, 387: 265−272. Pitacco A, Gallinaro N, Giulivo C. 1992. Evaluation of actual evapotranspiration of a Quercus ilex L. stand by the Bowen Ratio-Energy Budget method. Vegetation, 99−100: 163−168.Shachak M, Leeper A, Degen A A. 2002. Effect of population density on water influx and distribution in the desert snail Trochoidea seetzenii. Ecoscience, 9: 287−292.Shapotou Desert Experimental Research Station, Chinese Academy of Sciences. 1991. Study on Shifting Sand Control in Shapotou Region of the Tengger Desert (2). Yinchuan: Ningxia People’s Publishing House, 101−119.Simonin K A, Santiago L S, Dawson T E. 2009. Fog interception by Sequoia sempervirens (D. Don) crowns decouples physiology from soil water deficit. Plant, Cell & Environment, 32(7): 882−892.Sudmayer R A, Nulsen R A, Scott W D. 1994. Measured dewfall and potential condensation on grazed pasture in the Collie River basin, southwestern Australia. Journal of Hydrology, 154: 255−269.Wang S, Zhang Q. 2011. Atmospheric physical characteristics of dew formation in a semi-arid loess plateau. Acta Physica Sinica, 60(5): 059203.Xiao H, Meissner R, Seeger J, et al. 2009. Effect of vegetation type and growth stage on dewfall, determined with high precision weighing lysimeters at a site in northern Germany. Journal of Hydrology, 377: 43−49.Ye Y H, Zhou K, Song L Y, et al. 2007. Dew amounts and its correla-tions with meteorological factors in urban landscapes of Guangzhou, China. Atmosphere Research, 86(1): 21−29.Zheng X J, Song L, Yan L. 2011. Leaf water uptake strategy of desert plants in the Junggar Basin, China. Chinese Journal of Plant Ecology, 35(9): 893−905.Zhuang Y L, Ratcliffe S. 2012. Relationship between dew presence and Bassia dasyphylla plant growth. Journal of Arid Land, 4(1): 11−18. |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
