公路碾压干扰下群落植物多样性——以藏北矮嵩草草甸为例
文献类型：期刊论文
| 作者 | 刘淑珍 ; 鄢燕
|
| 刊名 | 生态学报
 |
| 出版日期 | 2006 |
| 卷号 | 26期号:9页码:2957-2963 |
| 关键词 | 植物多样性 青藏公路 碾压干扰 矮嵩草草甸 |
| 其他题名 | Plant diversity of trampling disturbance Kobresia humilis community in Naqu, Tibet |
| 通讯作者 | 张锦华 |
| 合作状况 | 国内 |
| 中文摘要 | 运用时空替换法,以空间变换替代时间变换,对公路碾压干扰下藏北矮嵩草草甸恢复演替中不同阶段群落植物多样性进行研究。结果表明:各草地群落样方中共出现高等植物33种,其中菊、豆、禾本科和蔷薇科合计16种,占48.48%,在其自然恢复演替所起的作用最大;莎草科植物作为顶级群落的建群种具有重要作用。物种构成具有明显的阶段性特征:演替前期以1年生和2年生植物为主;中期多年生草本植物逐渐占据优势;后期矮嵩草成为单优势种;菊叶萎陵菜和二裂萎陵菜几乎贯穿始终。物种积聚主要是在演替前期和中期完成,其积聚过程符合二次曲线。演替后期群落植物多样性程度最高,多样性随演替进程表现为逻辑斯谛增长规律:前期群落物种丰富度较低,均匀度较高,生态优势度λ也比较高,但综合多样性较低;中期群落的均匀度下降,生态优势度也同时下降,综合多样性高;后期矮嵩草成为群落的单优势种,群落的均匀度和生态优势度均下降,综合多样性仍然增加。 |
| 英文摘要 | Plant diversity is an important indicator of community succession processes.The change of community plant diversity during restoration succession processes of high mountain meadow in Naqu County,Tibet,31°30′56.2″～32°06′18.5″N and（91°55′15.5″）～92°16′51.4″E,was investigated.Five sampling sites with similar physical conditions but different succession stages were selected.The method of spatial changes in place of temporal changes was applied for field survey and data analysis.During repair work on the Qi-Zang Road at various times since 1973,traffic was diverted directly onto the adjacent grassland.Each time that the repair work was finished,the grassland began to recover from the trampling disturbance.The selection of sampling sites was dependent on the reconstruction of this road during 1973,1984,1991～1996 and 2004,which represent restoration years of 30,20,10 and 0,respectively.Grassland within animal pens was selected for comparison.The investigation was conducted in August of 2004 when the vegetation was most abundant.The plant species,the vegetation coverage,the number of tillers,the frequency,the height and the weight were investigated.Thirty-three plant species belonging to 12 families and 23 genera were found in the inventoried quadrates during the recovery process.About 48% seed plants of the total species were Leguminocae,Gramineae,Compositae and Rosaceae,and suggested the high-plants in four big families play important roles in natural vegetation recovery,while Kobresia play an important role in ultimate-communities.The plant species components changed with each succession stage.The plant species were mainly annual and biennial during the early succession stages,perennial species during the middle succession stages and predominantly Kobresia humilis during the late succession stages.Potentilla bifurca and Potentilla tanaletfolia were both found during all five stages.The accumulated number（y） of family,genus,and species during the succession process varied quadrically with the stages（y=a+bt+ct2）.Moreover,the increase rate of plant species during the early period was high,and about 48% of total species recovered in the first 20 years.The plant diversity（y） of Simpson index,Shannon-Wiener index,Margalef index,Pielou index and Complex index during the succession process varied logistically with the stages（t）,(y=a/(1+e-（t-t-0）/ b).The plant diversity was low during the early stage,higher during the middle stage,and highest during the entire late stage. |
| 分类号 | Q948 |
| 资助信息 | 西藏高原生态环境脆弱性与生态安全预警系统研究资助项目(2004CCA03600) |
| 语种 | 中文 |
| 公开日期 | 2011-06-14 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/3220]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 推荐引用方式 GB/T 7714 | 刘淑珍,鄢燕. 公路碾压干扰下群落植物多样性——以藏北矮嵩草草甸为例[J]. 生态学报,2006,26(9):2957-2963. |
| APA | 刘淑珍,&鄢燕.(2006).公路碾压干扰下群落植物多样性——以藏北矮嵩草草甸为例.生态学报,26(9),2957-2963. |
| MLA | 刘淑珍,et al."公路碾压干扰下群落植物多样性——以藏北矮嵩草草甸为例".生态学报 26.9(2006):2957-2963. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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