绿阔叶林木本植物的生境相关性分析

大样地文献

生物多样性 2011, 19 (2): 134–142 Doi: 10.3724/SP.J.1003.2011.09295 Biodiversity Science http: // 百山祖常绿阔叶林木本植物的生境相关性分析

王 伟1 骆争荣1 周荣飞2 许大明2 哀建国3 丁炳扬4*

1 (浙江大学生命科学学院, 杭州 310058)

2 (凤阳山-百山祖国家级自然保护区百山祖管理处, 浙江庆元 323800)

3 (浙江农林大学林业与生物技术学院, 浙江临安 311300) 4 (温州大学生命与环境科学学院, 浙江温州 325035)

摘要: 中性理论和生态位理论在解释热带雨林中物种共存机制上发挥了重要作用。本文通过Torus-translation检测方法对百山祖常绿阔叶林5 ha样地中DBH≥1 cm、个体数大于5的89种木本植物与4个根据地形和物种组成划分的小生境进行了关联性分析。同时按植物的胸径径级大小将其分为幼树期、生长期、成熟期3个生长阶段, 并分别分析了植物在这3个生长阶段与生境的关联性。结果表明: 89个木本植物中, 没有表现出显著的生境相关性的物种多是稀有种或是个体数较少的物种, 而大部分的常见种表现出与生境的显著相关性; 通过对每个物种不同生长阶段的生境相关性比较, 发现多数物种的生境相关性会发生改变, 其中只有麂角杜鹃(Rhododendron latoucheae)、褐叶青冈(Cyclobalanopsis stewardiana)和厚叶红淡比(Cleyera pachyphylla)在生长的3个生长阶段没有发生改变。这表明, 生境异质性对亚热带常绿阔叶林中木本植物的生物多样性的维持起着重要作用, 同时对不同生长时期的物种与生境相关性的分析结果表明, 大部分物种与生境的相关性会随着生长阶段的变化而发生变化。 关键词: 常绿阔叶林, 生境偏好, 地形, 生长时期, 物种分布, 生态位理论

Habitat associations of woody plant species in Baishanzu subtropical broad-leaved evergreen forest

Wei Wang1, Zhengrong Luo1, Rongfei Zhou2, Daming Xu2, Jianguo Ai3, Bingyang Ding4*

1 College of Life Sciences, Zhejiang University, Hangzhou 310058

2 Management of Baishanzu, Fengyangshan–Baishanzu National Nature Reserve, Qingyuan, Zhejiang 323800 3 School of Forestry and Biotechnology, Zhejiang A & F University, Lin’an, Zhejiang 311300 4 College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang 325035

Abstract: Both unified neutral theory and niche theory have played an important role in understanding the mechanisms of species coexistence in tropical rain forests. Using Torus-translation tests, we examined the relationships between microtopography (elevation, convexity, and slope) and the distribution of 89 wood species with ≥5 individuals and diameter at breast height (DBH) ≥ 1.0 cm in a 5-ha permanent plot in a sub-tropical broad-leaved evergreen forest in Baishanzu, Zhejiang Province. We classified plants into three growth stages (sapling, juvenile and mature stages) based on their diameter-classes, and compared relation-ships between microtopography and the distribution of plants in different growth stages for each species. Species with less than 40 individuals always showed few associations with their habitats, while most com-mon species in the 89 studied showed significant associations with their habitats. The majority of species ex-hibited shifts in habitat preference among growth stages; the exceptions were Rhododendron latoucheae, Cyclobalanopsis stewardiana and Cleyera pachyphylla, whose associations with habitats were similar at all stages. Our study suggests that topographical differentiation is important for maintaining species diversity in this subtropical broad-leaved evergreen forest, and that habitat associations of species change ontogeneti-cally.

—————————————————— 收稿日期: 2010-12-03; 接受日期: 2011-02-23

基金项目: 中国科学院专项基金“中国森林生物多样性监测网络建设”; 中国科学院水土保持研究所知识创新领域前沿项目(SW04013) * 通讯作者 Author for correspondence. E-mail: dingby2005@