文献类型：期刊文献

英文题名：Seasonal changes in the soil moisture distribution around bare rock outcrops within a karst rocky desertification area (Fuyuan County, Yunnan Province, China)

作者：Li, Sheng[1] Birk, Steffen[2] Xue, Liang[1] Ren, Huadong[1] Chang, Jun[1] Yao, Xiaohua[1]

第一作者：李生

通信作者：Birk, S[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Zhejiang, Peoples R China;[2]Graz Univ, Inst Earth Sci, NAWI Graz Geoctr, Heinrichstr 26, A-8010 Graz, Austria

年份：2016

卷号：75

期号：23

外文期刊名：ENVIRONMENTAL EARTH SCIENCES

收录：;EI(收录号：20165003119096);Scopus(收录号：2-s2.0-85001967816);WOS:【SCI-EXPANDED(收录号:WOS:000391380300018)】；

基金：Open access funding provided by University of Graz. The research was funded by the National Foundation of Natural Science Project (Nos. 31470632; 30972351), and the Chinese National Key Research and Development Project (No. 2016YFC0502605). The Austrian Federal Ministry of Science, Research and Economy (BMWFW) is acknowledged for a scholarship to Li Sheng within the framework of the EURASIA PACIFIC UNINET. We are very grateful to Qian X.Q., Liu J., and Hou P. for their indispensable assistance with sample plot investigation. We also thank Guizhou-Puding Desertification Ecosystem Research Station (State Forestry Administration, People's Republic of China) for support of field work. The comments by the two reviewers helped improve the paper.

语种：英文

外文关键词：Karst rocky desertification (KRD); Bare bedrocks; Soil moisture; Dry and wet season

摘要：The spatial and temporal soil moisture distribution is an important control on surface ecological processes in areas with rock outcrops resulting from karst rocky desertification (KRD). To explore the local effects of bare rocks within different seasons, soil moisture was measured in a KRD region (Fuyuan County, Yunnan Province, southwest China) at different depths and in different directions and distances from rock outcrops in both the dry and the wet seasons. The soil moisture north and east of the rocks was higher compared to the other directions and to the control plot. This effect is attributed to the shading by the rocks. The shading effect is evident in all seasons but more pronounced in the dry season. In the wet season, the directional dependency is restricted to the surface layer and the increase in soil moisture with depth is more pronounced around the rocks than at the control plot. This is attributed to precipitation-induced runoff from the rock outcrops infiltrating into the deeper layers at the rock-soil interface. These findings suggest the redistribution of water in the wet season and the spatial variation of evapotranspiration in the dry season are factors controlling the local soil moisture pattern around the rock outcrops.