刘冬瑞 朱颖 王金虎 陈德超

收稿日期：2019-12-18

*基金项目：江苏省企业研究生工作站资助项目;苏州科技大学风景园林学学科建设项目。

第一作者：刘冬瑞（1996- ），男，硕士生，研究方向为风景园林规划设计理论与实践。E-mail：1945966264@qq.com

通信作者：朱颖（1973- ），女，博士，副教授，研究方向为风景园林规划设计理论与实践。E-mail：zhuying@mail.usts.

edu.cn

摘要：探究溧阳紫楠天然群落的层次结构、物种多样性及稳定性特征，可为宜溧山区紫楠天然种群的保护提供指导，为紫楠在城市绿化中的运用提供参考。文章结合溧阳市生物多样性本底调查项目，基于10个20 m×20 m的调查样地，运用生态学有关研究方法对溧阳紫楠天然群落特征进行分析。结果表明：溧阳紫楠天然群落共有维管植物39科64属70种，其中种子植物34科57属63种，蕨类植物5科7属7种;群落垂直结构明显，紫楠、毛竹等为群落优势种;种子植物区系成分以热带性质为主;群落物种多样性总体表现出灌木层最大、草本层次之、乔木层最小的特征;该群落仍处于不稳定的状态。

关键词：紫楠，群落结构，物种多样性，群落稳定性，江苏溧阳

DOI： 10.12169/zgcsly.2019.12.18.0001

Community Structure and Its Species Diversityof  Phoebe sheareri

in Liyang of Jingsu Province

Liu Dongrui Zhu Ying Wang Jinhu Chen Dechao

（Suzhou University of Science and Technology， Suzhou 215000， Jiangsu， China）

Abstract：This study on the hierarchical structural， species diversity and stability of  Phoebe   sheareri  community in Liyang can provide guidance for the protection of the natural  Phoebe .   sheareri  community in Yili mountainous area and also provide reference for the application of  Phoebe sheareri  in urban greening. Based on the 10 20m×20m survey samples for the Biodiversity Survey Project of Liyang City， the paper adopts research methods related to ecology to analyze the characteristics of the  Phoebe sheareri  community. The results show that there are 70 species of vascular plants belonging to 64 genera and 39 families in the natural  Phoebe sheareri  community， among which there are 63 species of seed plants from 57 genera and 34 families and 63 species of ferns from57 genera in 5 families， and the community has obvious vertical structure with  Phoebe   sheareri  and Phyllostachys edulis  the dominant species. The floristic components of seed plants are mainly tropical， and the species diversity of the community presents the characteristics that the shrub layer is the largest， followed by the herbaceous layer and the arbor layer. The community is still in an unstable state.

Keywords：  Phoebe sheareri ， community structure， species diversity， community stability， Liyang City of Jiangsu Province

紫楠（ Phoebe sheareri） 是我國珍贵的特有植物，属樟科（Lauraceae）楠属（ Phoebe ）植物，其树形优美、叶大荫浓，是良好的城市园林绿化树种，具有较高的观赏价值。紫楠生长慢，耐荫，喜温暖湿润气候，多生于海拔1 500 m以下的阔叶林下或湿润的沟谷中，在江苏、安徽和浙江等省均有分布。近年来，紫楠盗采现象严重，数量急剧减少，人为活动的干扰导致了紫楠群落结构的改变，使其生境逐渐缩减和退化，因此紫楠自然种群的数量和规模都呈现退减趋势，亟待保护。……