基于异速生长理论的准噶尔盆地荒漠灌丛形态研究-植物生态学报.PDFVIP

植物生态学报 2011, 35 (5): 471–479 doi: 10.3724/SP.J.1258.2011.00471 Chinese Journal of Plant Ecology 基于异速生长理论的准噶尔盆地荒漠灌丛形态研究 1,2* 1 1 1** 李 嵩 郑新军 唐立松 李 彦 1中国科学院新疆生态与地理研究所阜康荒漠生态系统国家野外观测研究站, 乌鲁木齐 830011; 2 中国科学院研究生院, 北京 100049 摘 要 为了揭示荒漠灌丛形态的发生发展机制并认识其在荒漠生态系统中的功能, 从形态和结构决定功能的原理出发, 对 生长在准噶尔荒漠东南部的岛状灌丛进行了形态学调查。依据Malthusian方程微分形式, 根据异速生长理论, 建立了冠幅与株 高生长、灌丛表面积与体积生长的数学关系式, 利用植被调查数据进行了验证, 并最终得出不同灌丛在不同株高时的情景示 意图。结果表明: 1)将荒漠灌丛形态假设成半三轴椭球体是合理的; 2)虽然灌丛形态发展趋势可以是扁平、近半球和竖直3种 类型, 但是形态建成后, 一般维持在扁平和近半球两种类型; 3) 18类荒漠灌丛的体积和表面积的数量关系具有一定的一致性, 可能与同处于相同环境条件下的水分利用效率相近有关。 关键词 异速生长理论, 冠幅, 冠型, 荒漠灌丛, 相对生长速率 Morphological investigation of desert shrubs of China’s Junggar Basin based on allometric theory 1,2* 1 1 1** LI Song , ZHENG Xin-Jun , TANG Li-Song , and LI Yan 1Fukang Desert Ecosystem Observation and Experiment Station of Chinese Academy of Sciences, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi 830011, China; and 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China Abstract Aims Our objectives were to investigate how shape and structure affect shrub architecture and to understand its function in the desert ecosystem through simulating differences in crown architecture of desert shrubs in China’s Junggar Basin. Methods We analyzed shrub height and crown form. The difference between observed crown area and height and the estimated crown model was found to be a good measure of degree of crown development. A Malthusian conceptual model is proposed where crown area and height modify the crown architect