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玉景宁玉兰种群分布与群落结构研究

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以浙江省特有种景宁玉兰(Magnolia sinostellata)为研究对象,对其种群分布、物种多样性、空间结构进行了分析.结果表明:景宁玉兰种群数量极少,且主要集中分布于浙江丽水一带山区;景宁玉兰群落内共有54种植物(变种),以蔷薇科(Rosaceae)、山茶科(Theaceae)、杜鹃花科(Ericaceae)、壳斗科(Fagaceae)为主,阔叶箬竹(Indocalamus latifolius)为灌木层优势种(重要值为19.34),种群生活型谱中高位芽占据绝对优势,群落垂直结构明显;群落内乔木层的Pielou均匀度指数(1.16屿Simpson指数最高(0.85),灌木层的Shannon-Weiner指数最高(3.44),草本层的3个指数最低;经比较发现,3个分布区样方内各层物种多样性指数差异不显著.综上,景宁玉兰目前群落结构较为稳定,但仍存在被其他植物演替取代的较大可能性,建议今后采取相关措施进行保护.
Distribution and Community Structure of Magnolia sinostellata
Investigations were conducted on distribution area of Magnolia sinostellata, an endemic species of Zhejiang province, in Lishui, Jingning, Songyang and Wenzhou.The results showed that few communities distributed only in the south of Zhejiang province.There are 54 species (including varieties) in surveyed communities, dominated by Rosaceae, Theaceae, Ericaceae, Fagaceae.Indocalamus latifolius was the dominant species in shrub layer (Ⅳ=16.91).The main community life form spectrum was phanerophyte and vertical structure of the communities was obvious.The Pielou (1.16) and Simpson index (0.85) was the highest at tree layer, and Shannon-Weiner index was the highest (3.44) at shrub layer, but each index was the lowest at grass layer.There was no evident difference of species diversity index among three layers of investigated communities.The investigation demonstrated that the surveyed communities had stable structure, but they might be replaced by other plants.

Magnolia sinostellatapopulation distributionspecies diversitycommunity structure

余泽智、陈翔翔、卢璐、刘雪燕、殷荟、申亚梅

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浙江农林大学风景园林与建筑学院,浙江临安311300

景宁玉兰 种群分布 物种多样性 群落结构

国家自然科学基金资助项目浙江省科技厅面上项目浙江省农业新品种选育重大科技专项浙江省花卉创新团队子项目浙江农林大学研究生科研创新基金浙江农林大学人才启动项目

314005592008C320192012C12909-42011R50034-0931220132402252013FR087

2015

浙江林业科技
浙江省林业科学研究院 浙江省林学会 浙江省林业科技情报中心

浙江林业科技

北大核心
影响因子：0.483
ISSN：1001-3776
年,卷(期)：2015.35(3)
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