文献类型：期刊文献

英文题名：Effects of Diaspore Traits and Vegetation Structures on Wind Dispersal of Solanum rostratum Using Wind Tunnel Simulations

作者：Jiang, Yan[1,2] Zhou, Quanlai[1] Cao, Wei[1] Zhang, Yue[1] Su, Yuhang[1,2] Li, Xiangrong[1,2] Liu, Zhimin[1] Zhang, Jiaqi[1,2] Yu, Hang[1] Xin, Zhiming[3] Wang, Yongcui[1] Wang, Lixin[4]

第一作者：Jiang, Yan

通信作者：Zhou, QL[1];Zhang, Y[1]

机构：[1]Chinese Acad Sci, CAS Key Lab Forest Ecol & Management, Inst Appl Ecol, Shenyang, Peoples R China;[2]Univ Chinese Acad Sci, Beijing, Peoples R China;[3]Chinese Acad Forestry, Expt Ctr Desert Forestry, Beijing, Peoples R China;[4]Indiana Univ Indianapolis, Dept Earth & Environm Sci, Indianapolis, IN 46202 USA

年份：2025

外文期刊名：LAND DEGRADATION & DEVELOPMENT

收录：;EI(收录号：20251918381446);Scopus(收录号：2-s2.0-105004347053);WOS:【SCI-EXPANDED(收录号:WOS:001483350600001)】；

基金：This work was supported by National Key Research and Development Program of China (2021YFD1400303), National Natural Science Foundation of China (31971732 and 41601588).

语种：英文

外文关键词：diaspore velocity; dispersal strategy; threshold wind velocity; tumbleweed; vegetation structures; wind tunnel

摘要：The effects of diaspore traits and vegetation structure (VS) on the wind-dispersal processes of an invasive alien tumbleweed Solanum rostratum are not well understood. In this study, we used a wind tunnel to determine the wind velocity required for stem breakage of the plant. VSs of bare ground, desert steppe, typical steppe, and meadow steppe were simulated to determine the threshold wind velocity (TWV) of the plant (diaspore) and to measure diaspore velocity (DV) at wind velocities of 2, 4, 6, 8, 10, 12, and 14 m s(-1). The results showed that the stem of the plant did not break, even at a wind velocity of 14 m s(-1). The TWV is so high (> 6 m s(-1) on bare ground) that the diaspore could not move on the meadow steppe at a wind velocity of 14 m s(-1). Diaspore morphological traits and VS were key factors affecting the TWV, contributing 40.6% and 40.5%, respectively. Wind velocity, VS, and diaspore traits were the significant factors affecting DV, contributing 70.6%, 13.5%, and 6.6%, respectively. The DV significantly decreased from bare ground, desert steppe to typical steppe, and even remained still at a wind velocity of 14 m s-1 on the meadow steppe. Therefore, the diaspore adopts an anti-long-distance wind-dispersal strategy when the plant stem does not break, or the diaspore adopts a non-long-distance wind-dispersal strategy once the plant stem breaks. Understanding the wind-dispersal mechanism of S. rostratum is of practical significance for predicting its distribution, controlling its spread range, and promoting the restoration of degraded vegetation.