文献类型：期刊文献

英文题名：Higher soil capacity of intercepting heavy rainfall in mixed stands than in pure stands in riparian forests

作者：Zhang, Beibei[1] Xu, Qing[1] Gao, Deqiang[1] Jiang, Chunwu[2] Liu, Futing[3,4] Jiang, Jing[5] Ma, Yingbin[1,6]

第一作者：Zhang, Beibei

通信作者：Xu, Q[1]

机构：[1]Chinese Acad Forestry, Inst Forest Ecol Environm & Protect, Key Lab Forest Ecol & Environm State Forestry & G, Beijing 100091, Peoples R China;[2]Anhui Acad Forestry, Hefei 230001, Anhui, Peoples R China;[3]Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China;[4]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[5]Univ Calgary, Calgary, AB T2N 1N4, Canada;[6]Chinese Acad Forestry, Expt Ctr Desert Forestry, Dengkou 015200, Peoples R China

年份：2019

卷号：658

起止页码：1514-1522

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20185206316675);Scopus(收录号：2-s2.0-85059118306);WOS:【SCI-EXPANDED(收录号:WOS:000456175700140)】；

基金：This work was supported by the Forestry Industry Funds for Scientific Research on Public Causes (201504423) and the National Natural Science Foundation of China (31670720 and 31870716). The authors declare no conflict of interest.

语种：英文

外文关键词：Stable hydrogen isotope; Riparian forests; Different magnitudes of rainfall; Soil water-holding capacity; Soil properties; Vegetation biomass

摘要：Changes in global precipitation patterns would make wet regions lore humid and extreme precipitation events occur frequently, followed by widespread flooding. Riparian forests are more capable of withstanding floods than inland forests because they are frequently exposed to short-term flooding events. Although many previous studies have investigated the soil water dynamics of terrestrial forests, little is known about how the soil water of riparian forests responds to different amounts of rainfall and which factors mainly regulate the soil water-holding capacity. Here, we employed stable hydrogen isotope to explore the contribution of different magnitudes of rainfall (7.9, 18.6 and 34.1 mm) to the soil water in two types of riparian forests (pure vs. mixed stand of Populus deltoides) in the middle-lower reaches of the Yangtze River, China. We further used structure equation modelling to determine the relative importance of soil properties and vegetation biomass in affecting the contribution of different magnitudes of rainfall to soil water. Our results revealed that there was no significant difference between these two stand types in the contributions of light and moderate rainfall to soil water, while the contribution of heavy rainfall to soil water (CHRSW) in mixed stand was significantly higher than that in pure stand (74.3% vs. 62.9%), suggesting that mixed stand soil has higher water-holding capacity than pure stand soil. Furthermore, soil properties were the best predictor affecting CHRSW, which explained 68% and 59% of the variation in the CHRSW on the 1st and 8th days after rainfall, respectively. Moreover, the root biomass could indirectly affect the CHRSW. Overall, mixed stand soil had a greater capacity in intercepting and storing rainwater than pure stand soil, implying that the mixed stand plantation, rather than the pure stand, should be recommended in riparian forest restoration projects that aim to improve their capacity for alleviating floods. (C) 2018 Elsevier B.V. All rights reserved.