首页|期刊导航|生态学杂志|山西黎城野生萱草群落特征及稳定性

山西黎城野生萱草群落特征及稳定性OA北大核心CSTPCD

Characteristics and stability of wild Hemerocalli community in the Licheng County of Shanxi Province

中文摘要英文摘要

为了解野生萱草群落组成与多样性的变化,本研究在进行野生萱草群落样方调查的基础上,整合TWINSPAN分类和DCA排序、α与β多样性、Godron群落稳定性等方法,分析了山西黎城野生萱草群落特征及稳定性.结果表明:(1)TWINSPAN分类将该区野生萱草群落72个样方划分为两大类12个野生萱草群丛类型.(2)样方的DCA第一、二排序轴显示了不同野生萱草群丛优势种和物种多样性的梯度变化,沿DCA第一轴从左至右,共有优势种由以北萱草为主的群丛(Ⅷ-Ⅺ)逐渐转变为以黄花菜为主的群丛(Ⅰ-Ⅶ、Ⅻ);沿第二轴从上到下,群丛物种多样性呈递减趋势.72种植物DCA排序和样方DCA排序的变化趋势基本一致.(3)12个群丛的Shannon和Simpson多样性指数、Patrick和Margalef丰富度指数差异明显,且其变化趋势基本一致;群丛相似性的Sørensen系数与Jaccard系数变化趋势基本一致,12个群丛的物种组成和生境条件均存在一定程度的差异.(4)12个群丛不稳定,且群丛多样性与稳定性关系不一致.综上,黎城野生萱草群落不稳定,受生境条件和人为干扰(旅游、放牧等)影响较大,未来应加强其种质资源的科学保护.

We investigated the composition and diversity of wild Hemerocallis community in the Licheng County of Shanxi Province,and analyzed community characteristics and stability using TWINSPAN classification and DCA ordination,α and β species diversity,and Godron community stability.The results showed that:(1)72 quadrats of wild Hemerocallis communities could be divided into 12 associations and two groups by TWINSPAN classification.(2)The first and second DCA axes of the 72 quadrats respectively represented the changes of dominant species and diversity in different wild Hemerocallis associations.Along the first axis of DCA from left to right,the co-dominant species gradually changed from the associations Ⅷ-Ⅺ dominated by H.esculenta to the associations of Ⅰ-Ⅶ andⅫ dominated by H.citrine.Along the second axis from top to bottom,species diversity of the associations gradually decreased.The change tendency of DCA ordination of 72 plant species was basically consistent with that of the DCA ordination of quadrats.(3)Shannon diversity index,Simpson diversity index,Patrick richness index,and Margalef richness index of the 12 associations were significantly different,but with similar changing trends.The change tend-ency of Sørensen similarity coefficient was basically consistent with that of the Jaccard similarity coefficient,but the species compositions and habitats of 12 associations were different to some extent.(4)The 12 associations were unstable and the relationship between species diversity and association stability was inconsistent.In summary,wild Hemerocallis community in the Licheng County was unstable,which was highly affected by habitat conditions and human disturbances(such as tourism and grazing).Therefore,scientific protection of wild Hemerocallis germplasm resources in this region should be strengthened in the future.

李志娟;李素清

山西农业大学园艺学院,太原 030031山西大学黄土高原研究所,太原 030006

野生萱草群落分类与排序物种多样性群落稳定性

wild Hemerocallis communityclassification and ordinationspecies diversitycommunity stability

《生态学杂志》 2024 (007)

2083-2092 / 10

国家自然科学青年科技基金项目(32002085)、山西农业大学博士科研启动项目(2021BQ55)和山西农业大学双一流园艺学科建设项目(23142N02070002)资助.

10.13292/j.1000-4890.202407.013

评论