根茎克隆植物芦苇应对风沙活动过程的生长和生殖的权衡关系  

Trade-offs in growth and reproduction of rhizomatous clonal plant Phragmites communis in response to aeolian processes

作　　者：Chaoqun Ba Shanshan Zhai Jianqiang Qian Bo Liu Jinlei Zhu Zhimin Liu 

机构地区：[1]Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]College of Forestry,Henan Agricultural University,Zhengzhou 450002,China [4]College of Life Science,Qufu Normal University,Qufu 273165,China [5]Institute of Ecological Conservation and Restoration,Chinese Academy of Forestry,Beijing 100093,China

出　　处：《Journal of Plant Ecology》2024年第1期68-77,共10页植物生态学报（英文版）

基　　金：This research was funded by the National Natural Science Foundation of China(31770504,41877542,and 41907411).

摘　　要：生长和繁殖之间的权衡是克隆植物适应性策略的重要组成部分。根茎型沙生植物通过权衡策略应对风沙过程(埋沙和风蚀)对它们在流动沙丘上的定居尤为重要。尽管根茎型物种对风沙过程的响应已经有了部分研究,但这些克隆物种如何通过生长和繁殖中的潜在权衡关系来应对风沙过程仍不清楚。在本研究中,我们采用了野外调查和生物量建模的手段,评估了芦苇(Phragmites communis)在沙埋和风蚀条件下,营养生长和生殖生长以及分株数量和大小之间的权衡关系。研究结果表明,沙埋促进了种子生物量和生殖努力(RE)的增加;风蚀减少了RE,但对种子生物量没有显著影响。沙埋增加了分株的生物量,而风蚀增加了分株种群密度并加速了分株的成熟。这些研究表明,根茎型沙地植物通过调整其生长策略来应对风沙过程,即在沙埋条件下,增加生殖生长和分株大小,而在风蚀条件下,增加营养生长和分株数量。Trade-offs in growth and reproduction are essential parts of the adaptive strategies of clonal plants.How rhizomatous psammophytes respond to aeolian processes(sand burial and wind erosion)by means of trade-offs is supposed to be especially important for their colonization on the active sand dune.Despite partial documentation of the responses of rhizomatous species to aeolian processes,how these clonal species respond to aeolian processes by means of potential trade-offs in growth and reproduction still remains unclear.In this study,we employed field investigation and biomass modeling to evaluate the trade-offs between vegetative and reproductive growth as well as between the number and size of ramets of Phragmites communis in response to sand burial and wind erosion.Sand burial enhanced the accumulation of seed biomass and reproductive effort.Wind erosion reduced reproductive effort but had no significant influence on seed biomass.Sand burial increased the biomass of ramets,while wind erosion increased ramet population density and accelerated ramet maturation.Our results demonstrate that rhizomatous psammophytes adjust their growth strategies in response to aeolian processes,i.e.reproductive growth and ramet size increase in response to sand burial,while vegetative growth and ramet numbers increase in response to wind erosion.

关 键 词：适应策略 沙埋 风蚀 芦苇(Phragmites communis) 有性生长 无性生长 根茎 

分 类 号：Q94[生物学—植物学]