[1]刘颖,贺静雯,李松阳,等.云南蒋家沟流域不同海拔梯度土壤种子库特征[J].森林与环境学报,2020,40(03):225-233.[doi:10.13324/j.cnki.jfcf.2020.03.001]
 LIU Ying,HE Jingwen,LI Songyang,et al.Soil seed bank characteristics in different altitude gradients in Jiangjia Gulley watershed, Yunnan[J].,2020,40(03):225-233.[doi:10.13324/j.cnki.jfcf.2020.03.001]
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云南蒋家沟流域不同海拔梯度土壤种子库特征()
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《森林与环境学报》[ISSN:2096-0018/CN:35-1327/S]

卷:
40卷
期数:
2020年03期
页码:
225-233
栏目:
出版日期:
2020-05-15

文章信息/Info

Title:
Soil seed bank characteristics in different altitude gradients in Jiangjia Gulley watershed, Yunnan
作者:
刘颖12 贺静雯12 李松阳12 余杭12 林勇明12 王道杰3
1. 福建农林大学林学院, 福建 福州 350002;
2. 中国科学院山地灾害与地表过程重点实验室, 四川 成都 610041;
3. 中国科学院水利部成都山地灾害与环境研究所, 四川 成都 610041
Author(s):
LIU Ying12 HE Jingwen12 LI Songyang12 YU Hang12 LIN Yongming12 WANG Daojie3
1. College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China;
2. Key Laboratory of Mountain Hazards and Surface Processes, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China;
3. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu, Sichuan 610041, China
关键词:
土壤种子库海拔梯度数量特征物种组成物种多样性相似性蒋家沟流域
Keywords:
soil seed bankaltitude gradientquantitative characteristicsspecies compositionspecies diversitysimilarityJiangjia Gulley watershed
分类号:
X821
DOI:
10.13324/j.cnki.jfcf.2020.03.001
摘要:
为了解云南蒋家沟流域土壤种子库在不同海拔梯度上的变化特征,明确种子库对植被垂直带谱的响应性机制及群落恢复潜力,选取蒋家沟流域8条海拔带[Ⅰ(2 700~2 900 m)、Ⅱ(2 500~2 700 m)、Ⅲ(2 300~2 500 m)、Ⅳ(2 100~2 300 m)、Ⅴ(1 900~2 100 m)、Ⅵ(1 700~1 900 m)、Ⅶ(1 500~1 700 m)、Ⅷ(1 300~1 500 m))]为研究对象,对其植物群落土壤种子库的数量特征、物种组成、物种多样性及种子库相似性进行研究。结果表明:Ⅲ、Ⅱ海拔带的平均物种数和种子密度显著高于Ⅶ、Ⅷ海拔带,土壤种子库种子密度与物种数量随海拔降低而逐渐减少;Ⅰ、Ⅱ、Ⅲ海拔带的Margalef丰富度指数(M)大于5.000,Ⅶ、Ⅷ海拔带M小于3.000。种子库萌发物种以菊科和禾本科草本植物为主,海拔2 300 m以上以多年生草本植物占优势,海拔2 100 m以下则以1年和2年生草本植物占优势。各海拔带物种分布均匀性较好,除Ⅵ海拔带外,其余海拔带Pielou均匀度指数(J)均大于0.900。Ⅲ海拔带的Simpson优势度指数(D)和Shannon-Wiener多样性指数(H)最高,分别为0.942和3.006;Ⅶ海拔带的DH最低,为0.810和1.720。除Ⅶ、Ⅷ海拔带以外,其余海拔带的土壤种子库均与临近海拔带种子库相似性最高,Sorensen相似性系数(CS)为0.400≤CS<0.550,且整体上表现为随海拔升高CS逐渐减小的趋势。蒋家沟流域植被群落土壤种子库的变化受海拔梯度的影响,与蒋家沟流域内气候的垂直地带分布具有一定的关系。
Abstract:
To clarify the variation characteristics of soil seed banks in different elevation gradients, the response of these banks to the vertical band spectrum, and the potential for community restoration in the Jiangjiagou Gulley watershed, Yunnan, 8 elevation zones [Ⅰ(2 700-2 900 m), Ⅱ(2 500-2 700 m), Ⅲ(2 300-2 500 m), Ⅳ(2 100-2 300 m), Ⅴ(1 900-2 100 m), Ⅵ(1 700-1 900 m), Ⅶ(1 500-1 700 m), Ⅷ(1 300-1 500 m))] were selected as research objects. We studied the quantitative characteristics, species composition, species diversity, and similarity of soil seed banks in plant communities.The average species number and seed density in the Ⅲ and Ⅱaltitude zones were found to be significantly higher than those of Ⅶ and Ⅷ. The seed density and number of species in the soil seed banks gradually decrease with decreasing altitude. The Margalef richness indexes (M) of Ⅰ, Ⅱ and Ⅲ are greater than 5.000,while those of Ⅶ and Ⅷ are less than 3.000. The seed germination species are mainly composed of Compositae and Gramineae.More than 2 300 m are dominated by perennial herbs; below 2 100 m, annual herb and biennial herb plants predominate and the distribution of species in each altitude zone is adequate.The altitude uniformity index is greater than 0.900 except for the altitude zone of Ⅵ. The Simpson dominance index(D) and the Shannon-Wiener diversity index (H) in altitude zone Ⅲ are the highest, with values of 0.942 and 3.006, respectively.The D and H of altitude zone Ⅶ are the lowest, with values 0.810 and 1.720, respectively.Except for the Ⅶ and Ⅷ altitude zones, the soil seed banks of the other altitude zones had the highest similarity with the seed bank of the adjacent elevation zone.The Sorensen similarity coefficient is expressed as 0.400≤CS<0.550.The similarity coefficient decreases with the increasing altitude distance.Our results indicate that the change of soil seed banks of the vegetation community in the Jiangjiagou Gulley watershed is affected by the elevation gradient, which is related to the vertical distribution of climate.

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备注/Memo

备注/Memo:
收稿日期:2020-01-17;改回日期:2020-02-24。
基金项目:中国科学院山地灾害与地表过程重点实验室开放基金项目(20190402);国家自然科学基金项目(41790434);福建农林大学杰出青年科研人才计划项目(xjq2017016)。
作者简介:刘颖(1995-),女,硕士研究生,从事自然资源管理研究。Email: liuying052820@163.com。
通讯作者:林勇明(1982-),男,教授,从事恢复生态学研究。Email: monkey1422@163.com。
更新日期/Last Update: 1900-01-01