Differential wind tolerance of soil crust mosses explains their micro-distribution in nature
Differential wind tolerance of soil crust mosses explains their micro-distribution in nature
复制标题
土壤结皮苔藓的差异耐风性解释了它们在自然界中的微观分布
DOI：
10.1016/j.soilbio.2011.09.021
复制
发表时间：
2012-02-01
影响因子：
9.7
通讯作者：
Zhang, Xiao Tao
中科院分区：
文献类型：
--
作者：
Jia, Rong Liang;Li, Xin Rong;Zhang, Xiao Tao
风对世界各地生物的生物学和生态学性能具有广泛的影响。然而，沙漠生物土壤结皮对风的响应在很大程度上仍然是未知的。银真藓（Bryum argenteum）和葡萄根藓（Didymodon vinealis）是两种主要的土壤结皮藓类，它们表现出与B相反的有限微生境。在北方腾格里沙漠固定沙丘迎风坡高风速微区中，argenteum被排除在外。本研究旨在探讨风对这两种土壤结皮藓的生理生态指标是否有负面影响，以及风对这两种土壤结皮藓的影响。vinealis比B具有更强的抗高风速能力。银。结果表明，在高风速条件下，两种土壤结皮藓的光合作用、呼吸作用、PSII光化学效率、光合色素、地上部生长、生产力和更新潜力均受到严重抑制。此外，D. vinealis比B表现出更强的抗风能力。Argenteum基于上述所有方面。总体而言，风对土壤结皮苔藓的生理和差异阻力的负面影响，在这项研究中观察到的风表明，风是一个重要的决定性调节器，影响生态微分布格局的土壤结皮苔藓在荒漠生态系统。皇冠版权所有（C）2011由爱思唯尔有限公司出版。保留所有权利。
Wind has extensive effects on biological and ecological performances of organisms throughout the world. However, the responses of desert biological soil crusts to wind are still largely unexplored. Bryum argenteum and Didymodon vinealis are two predominant soil crust mosses that exhibit restricted, contrasting microhabitats with B. argenteum being excluded from higher wind speed microsites in the windward slopes of fixed sand dunes in the Tennger Desert, Northern China. We conducted this study to determine if wind has negative effects on the ecophysiological variables of the two soil crust mosses and whether D. vinealis possesses greater resistance to high wind speed than B. argenteum. The results showed that photosynthesis, respiration, PSII photochemical efficiency, photosynthetic pigments, shoot upgrowth, productivity and regeneration potential of the two soil crust mosses were all drastically inhibited due to the rapid drying, prolonged drought period and unfavorable coupling of moisture and temperature under high wind speed conditions. In addition, D. vinealis displayed stronger resistance to wind than B. argenteum based on all of the aspects mentioned above. Overall, the negative effects of wind on the physiology of soil crust moss and the differential resistance to wind observed in this study suggest that wind is an important determinant regulator influencing ecological micro-distribution patterns of soil crust moss in desert ecosystems. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.