摘要
本研究通过对峨眉山龙池(LC1、LC2)、洪雅李家山(HY1、HY2)、瓦屋山双洞溪(WWS)新发现的光叶蕨种群进行实地调查,建立了5个样地,系统分析了其群落特征和生态位特征,并与二郎山原有种群进行了对比分析。结果表明:(1)新分布区群落的物种丰富度和Margalef丰富度指数高于二郎山群落,并呈现出更复杂的垂直结构(乔灌草全层发育);(2)光叶蕨在HY2、LC2样地中的生态位宽度均最宽,表现出较强的资源利用能力,在LC1样地生态位宽度最窄,表明其适应性受生境类型和人为干扰影响;(3)光叶蕨与其他物种的生态位相似度为0.095~0.712,差异较大,与红毛虎耳草、耳状人字果、冷水花的生态位重叠度均在0.9以上,但整体竞争压力低于二郎山群落。
Field investigations were conducted on three newly discovered populations of Cystopteris chinensis in Longchi of Emeishan(LC1、LC2),Lijiashan of Hongya(HY1、HY2),and Shuangdongxi of Wawushan(WWS).Five sample plots were established,and the community characteristics and niche characteristics were systematically analyzed.A comparative analysis was performed with the original population in Erlangshan.The results are described as follows.(1)The community in the new distribution area had higher species richness and Margalef richness index than the Erlangshan community,presenting a more complex vertical structure(full-layer development of trees,shrubs,and herbs).(2)C.chinensis showed the widest niche width in both sample plots HY2 and LC2,demonstrating a strong resource utilization capacity.However,in the sample plot LC1,this species showcased a small niche width,which indicated that its adaptability was affected by habitat types and human disturbances.(3)The niche similarity between C.chinensis and other species varied greatly(ranging from 0.095 to 0.712),and the niche overlap degrees of C.chinensis with Saxifraga rufescens,Dichocarpum auriculatum,and Pilea notata,were all above 0.9.The overall competitive pressure of the community in the new distribution area was lower than that of the Erlangshan community.
作者
陈绪玲
吴航玉
李小杰
谢孔平
李策宏
CHEN Xu-ling;WU Hang-yu;LI Xiao-jie;XIE Kong-ping;LI Ce-hong(Sichuan Provincial Academy of Natural Resource Sciences,Chengdu 610015,PRC;Civil-Military Integration Center of China Geological Survey,Chengdu 610036,PRC)
出处
《湖南农业科学》
2025年第8期54-60,112,共8页
Hunan Agricultural Sciences
基金
四川省省级基本科研业务费项目(2023JDKY0001)。
关键词
光叶蕨
群落特征
生态位特征
Cystopteris chinensis
community characteristics
niche characteristics
