百山祖常绿阔叶林木本植物的生境相关性分析  

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

作　　者：王伟[1] 骆争荣[1] 周荣飞 许大明 哀建国[3] 丁炳扬[4] 

机构地区：[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

出　　处：《生物多样性》2011年第2期134-142,共9页Biodiversity Science

基　　金：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)

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5ha样地中DBH≥1cm、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。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 subtropical 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 common species in the 89 studied showed significant associations with their habitats. The majority of species exhibited 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 broadleaved evergreen forest, and that habitat associations of species change ontogenetically.

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 

分 类 号：Q948[生物学—植物学]