长江流域资源与环境 >> 2013, Vol. 22 >> Issue (11): 1319-.

• 自然资源 • 上一篇    下一篇

川东平行岭谷区野生春剑伴生植物群落特征研究

李 杰| 匡 萍| 王芝娜| 张银洁   

  1. (西南科技大学生命科学与工程学院|四川 绵阳 621010)
  • 出版日期:2013-10-20

DISTRIBUTION STATUS OF WILD CYMBIDIUM TORTISEPALUM VAR.LONGIBRACTEATUM RESOURCES AND ASSOCIATED PLANTS IN PARALLEL RIDGEVALLEY REGION IN 
THE EASTERN SICHUAN OF CHINA

LI Jie,KUANG Ping,WANG Zhina,ZHANG Yinjie   

  1. (College of Life Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China)
  • Online:2013-10-20

摘要:

为了对春剑野生种群生物多样性保护和再引入生态重建提供理论和技术基础,采用典型样地调查法,对川东平行岭谷区野生春剑伴生植物群落特征进行了研究。结果表明:野生春剑主要分布在松科与壳斗科针阔混交林、壳斗科常绿落叶阔叶混交林和松树林植物群落,伴生植物有40科58属70种,优势种主要是乔木层的马尾松、青冈、巴山松、油松等,灌木层的杜鹃花、马桑、山茶花等,草本层的蕨类和地被层的苔藓。其中,马尾松、杜鹃花、蕨类、苔藓具有较高的重要值,可作为野生春剑栖息地的指示植物。春剑伴生植物种类具有相对的特异性和选择性,与其它群落相比,群落3、群落4和群落6物种多样性指数H′和均匀度指数E都相对较低,松科和壳斗科植物个体数量较多并占有突出地位,春剑种群的生态密度也相对较高。虽然川东平行岭谷区野生春剑的适生生境条件依然存在,但春剑种群数量总体较小,种群的生态密度在11~60株/hm2,人为破坏性的滥采,是其濒危的直接原因。加强野生春剑资源的就地保护和生境保护,突破春剑种子野生环境共生萌发技术瓶颈,积极开展春剑的“再引入”工作,是春剑保育策略的重要方向

Abstract:

Wild Cymbidium tortisepalum var.longibracteatum (Orchidaceae) plants in Sichuan Province of China have become endangered due to overharvesting in recent years.In order to provide theoretical and technical basis on wild C.tortisepalum var.longibracteatum biodiversity conservation and reintroduction in a larger scale,a systematic investigation on the main habitats of populations was conducted based on representative plot survey in Parallel Ridgevalley Region of the Eastern Sichuan in 2010.The results showed that the wild C.tortisepalum var.longibracteatum distributed mainly under the mixed forest of Pinoideae and Fagaceae,Mixed Fagaceae forest and [JP2]Pinus forest where the altitude was about 680-1 900 m,[JP] and its main associated plants were composed of 34 species belonging to 15 families,28 genera in tree layer,18 species belonging to 12 families,15 genera in shrub layer and 17 species belonging to 12 families,14 genera in field layer.Among associated plants,the shade density of tree layer was from 0.2 to 0.4,and the dominant species were Pinus massoniana, Fagus longipetiolata,Pinus henryi,Pinus tabuliformis, Fagus pashanica,Lithocarpus cleistocarpus and Quercus acutissima etc.The coverage of shrub layer was from 30% to 50%,and the dominant species were Rhododendron,Coriaria sinica,Camellia japomica,Rubus orchorifolius and Pyracantha fortuneana etc.The coverage of field layer was about 40% to 80%,and its dominant species were Bryophyta,lichen,Pteridophyta.Among these plants,Pinus massoniana,Rhododendron,Bryophyta and Pteridophyta can be used as indicative plants for its high important value.Species diversity of plant community in different populations was investigated.Plants in the populations associated with suitable habitats of C.tortisepalum var.longibracteatum were prosperity and lush.Species abundance index of D was between 1.915 to 3.572 in 10 populations.Compared with others,the population of 1st,3rd and 6th had relatively low index of H′(Shannonwiener index) and E (Pielou index),and had high ecological density of C.tortisepalum var.longibracteatum,which indicated that individuals of Pinaceae and Fagaceae were more than some other species and prominent in those populations.The individual quantity of every population of wild C.tortisepalum var.longibracteatum were only from 11 to 60 individual plants per ha,which revealed that this species in Parallel Ridgevalley Region in the Eastern Sichuan had become endangered due to overharvesting.Although C.tortisepalum var.longibracteatum is rather rare,the habitat of wild C.tortisepalum var.longibracteatum were still protected well.These results,combined with other information about C.tortisepalum var.longibracteatum,may provide an important basis for proposing conservation strategies.In situ conservation will be suitable for in Parallel Ridgevalley Region of the Eastern Sichuan,especially in Tongjiang(the 1st population and 3rd population)and Nanjiang(the 6th population),while the researches about seed physiology and symbiotic germination to raise germination rate of C.tortisepalum var.longibracteatum in wild environment and the application of reintroduction in the conservation of endangered orchid should be taken into consideration to expand the population to save the endangered status

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 王红丽,| 刘 健 | 况雪源. 四种再分析资料与长江中下游地区降水观测资料的对比研究[J]. 长江流域资源与环境, 2008, 17(5): 703 .
[2] 陈翠华,倪师军,何彬彬,张成江. 江西德兴矿集区水系沉积物重金属污染分析[J]. 长江流域资源与环境, 2008, 17(5): 766 .
[3] 罗专溪,朱波,汪涛,唐家良,王冬,辛伟. 紫色土坡地泥沙养分与泥沙流失的耦合特征[J]. 长江流域资源与环境, 2008, 17(3): 379 .
[4] 潘竟虎. 近15年来长江源区土地利用变化及其生态环境效应[J]. 长江流域资源与环境, 2005, 14(3): 310 -315 .
[5] 梁常德,龙天渝,李继承,刘腊美. 三峡库区非点源氮磷负荷研究[J]. 长江流域资源与环境, 2007, 16(1): 26 -30 .
[6] 吴威 陈雯 曹有挥. 过江通道建设对相对落后地区发展的影响——以江苏省南通市为例[J]. 长江流域资源与环境, 2009, 18(5): 397 .
[7] 刘毅, 陶勇, 万开元, 张过师, 陈树森, 陈防. 丹江口库区坡耕地柑桔园不同覆盖方式下地表径流氮磷流失特征[J]. 长江流域资源与环境, 2010, 19(11): 1340 .
[8] 左倬, 由文辉, 汪冬冬. 上海青浦区不同用地类型河流滨岸带生境及植物群落组成[J]. 长江流域资源与环境, 2011, 20(1): 116 .
[9] 陈文静| 张燕萍| 赵春来| 王昌来. 近年长江湖口江段鱼类群落组成及多样性[J]. 长江流域资源与环境, 2012, 21(06): 684 .
[10] 陈秋红. 湖南省碳源与碳汇变化的时序分析[J]. 长江流域资源与环境, 2012, 21(06): 766 .