文献类型：期刊文献

英文题名：Responses of secondary wind dispersal to environmental characteristics and diaspore morphology of seven Calligonum species

作者：Zhou, Quanlai[1] Liu, Zhimin[1] Xin, Zhiming[2] Daryanto, Stefani[3,4] Wang, Lixin[5] Li, Xuehua[1] Wang, Yongcui[1] Liang, Wei[1,6] Qin, Xuanping[1,6] Zhao, Yingming[2] Li, Xinle[2] Cui, Xue[7] Liu, Minghu[2]

第一作者：Zhou, Quanlai

通信作者：Liu, MH[1]

机构：[1]Chinese Acad Sci, Inst Appl Ecol, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China;[2]Chinese Acad Forestry, Expt Ctr Desert Forestry, 1 Tuanjie Rd, Dengkou 015200, Peoples R China;[3]Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resources Ecol, Beijing 100875, Peoples R China;[4]Beijing Normal Univ, Fac Geog Sci, Inst Land Surface Syst & Sustainable Dev, Beijing 100875, Peoples R China;[5]IUPUI, Dept Earth Sci, Indianapolis, IN 46202 USA;[6]Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China;[7]Stn Forest & Grassland Pest Control & Quarantine, Shenyang 110036, Liaoning, Peoples R China

年份：2020

卷号：31

期号：7

起止页码：842-850

外文期刊名：LAND DEGRADATION & DEVELOPMENT

收录：;EI(收录号：20195207931656);Scopus(收录号：2-s2.0-85076894749);WOS:【SCI-EXPANDED(收录号:WOS:000503823900001)】；

基金：National Natural Science Foundation of China, Grant/Award Number: 41571270

语种：英文

外文关键词：adaptive features; diaspore morphology traits; diaspore velocity; threshold wind velocity; wind tunnel

摘要：Secondary diaspore dispersal by wind, that is, wind-driven movement along the ground surface (GS), is important for the structure and dynamics of plant populations and communities. However, how wind velocity (WV), GS, and diaspore morphology influence diaspore secondary dispersal by wind are unclear. We used a wind tunnel and video camera to measure the threshold of WV (TWV) and diaspore velocities (DV) of secondary diaspore dispersal. Diaspores of seven Calligonum species with different appendages (wings, bristles, membranous balloon, and wings + thorns) were used to determine the TWV and DV under variable wind speed (4, 6, 8, and 10 m s(-1)) and four GSs (cement, sand, loam, and gravel). GS and diaspore morphological traits explained 37.1 and 18% of diaspore TWV, respectively. Meanwhile, WV, GS, and diaspore morphological traits explained 62.4, 13.6, and 3.2% of DV, respectively. An increasing trend was shown for TWV, and a decreasing trend was shown for DV in the order of cement, sand, loam, and gravel surfaces. Spherical and light diaspores had low TWV and high DV, whereas winged and heavy diaspores had high TWV and low DV. Our results indicated that adaptive features of diaspore appendages might be the result of selection for primary dispersal or secondary dispersal. The mechanism of diaspore secondary dispersal is important for understanding the recovery of degraded sand dunes and providing theoretical support for restoration practices.