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[1]陈露蔓 吕倩 刘思泽 罗艳 陈小红 陈雨芩 陈刚 范川 李贤伟**.柏木低效人工林开窗初期草本层植物多样性及生态位[J].应用与环境生物学报,2021,27(03):1-13.[doi:10.19675/j.cnki.1006-687x.2020.05025]
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柏木低效人工林开窗初期草本层植物多样性及生态位()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
27卷
期数:
2021年03期
页码:
1-13
栏目:
研究论文
出版日期:
2021-06-25

文章信息/Info

作者:
陈露蔓1 吕倩1 刘思泽1 罗艳1 陈小红12 陈雨芩1 陈刚1 范川12 李贤伟123**
1四川农业大学林学院 成都 611130
2长江上游森林资源保育与生态安全国家林业局重点实验室 成都 611130
3长江上游林业生态工程四川省重点实验室 成都 611130
关键词:
柏木低效人工林开窗草本植物多样性生态位
Keywords:
Cupressus funebris inefficient plantation forest gap reconstruction herbaceous layer plant diversity niche
DOI:
10.19675/j.cnki.1006-687x.2020.05025
摘要:
草本层对环境变化较为敏感,能更快反映改造带来的影响。为改善柏木人工林生态服务功能,精准提升其森林质量,以川中丘陵区柏木低效人工林为对象,采用3种不同开窗尺度(50 m2、100 m2和200 m2)的改造方式,分析开窗1年后不同面积林窗的草本层植物多样性和生态位变化规律。结果显示:与对照林分相比,开窗后林地草本植物Simpson指数、Shannon-Wiener指数和丰富度指数显著提高(P < 0.05),并在100 m2林窗内均达到最优,随着林窗面积(50-200 m2)的增大,不同指数的变化不尽相同,均匀度指数持续增加,Simpson指数、Shannon-Wiener指数均先增后稳,丰富度指数先稳后降,100 m2为变化趋势转变的分界点。对照林地内喜阴植物地果生态位宽度最大,开窗后更新物种如喜阳植物五节芒对环境的适应和利用资源的能力更强,生态位宽度不断拓宽;随着林窗面积(50-200 m2)的增大,林地内草本群落整体呈现阳性-中性的演替格局,由于开窗时间较短,更新物种还处于资源利用扩张阶段,各处理草本植物间生态位重叠度值均低(<0.1),生态位分化差异较大,种间竞争小,生态位宽度与生态位重叠度之间的变化规律并不明显,其中100 m2林窗内草本层整体生态位分化更均匀。本研究表明开窗初期能够提升林地草本层植物多样性,改变草本群落结构,从生物多样性功能提升和生态系统稳定的角度考虑,100 m2是较合适的开窗面积。(图3表7参46)
Abstract:
The herbaceous layer is more sensitive to environmental change, which can reflect the impact of the reconstruction more quickly, in order to improve the ecological service function of Cupressus funebris inefficient plantations and improve its forest quality accurately. This study took the Cupressus funebris inefficient plantations in the hilly area of central Sichuan as the object, the herbaceous layer plant diversity and niche change law of different area forest gaps after one year of gap reconstruction were analyzed by three different forest gap scales (50 m 2, 100 m2 and 200 m 2). The results showed that compared with the control (CK) , the Simpson index, Shannon-Wiener index and richness index of herbaceous plants in the forest land increased significantly after gap reconstruction (P < 0.05), and reached the optimum within the 100m 2 forest gap. With the increase of the forest gap area (50-200 m 2), the changes of different indexes were different, and the Pielou index continued to increase. Simpson index and Shannon-Wiener index both increased first and then stabilized, while richness index stabilized first and then decreased, and 100 m 2 was the dividing point for the change trend. The niche breadth of Shade-requiring plant like Ficus tikoua was the largest before the gap reconstruction, and the ability of regeneration species, such as Miscanthus floridulus , to adapt to the environment and use resources was stronger after the gap reconstruction, and the niche breadth was continuously widened. With the increase of forest gap area (50-200 m 2), the whole herbaceous community in the forest presented a positive neutral succession pattern. Because of the short gap reconstruction time, the regeneration species were still in the stage of resource utilization and expansion. The niche overlap of each treatment was low ( < 0.1) , the niche differentiation difference was large, the interspecific competition was small, and the change rule between niche breadth and niche overlap was not obvious. Among which the overall niche differentiation of herbaceous layer in 100m 2 forest gap was more uniform. This study shows that the initial stage of forest gap reconstruction can improve the diversity of herbaceous layer plants, change the structure of herbaceous community of Cupressus funebris inefficient plantations. Considering the improvement of biodiversity function and the stability of ecosystem, 100m 2 is a suitable area for forest gap reconstruction.

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备注/Memo

备注/Memo:

收稿日期 Received: 2020-05-14 接受日期 Accepted: 2020-08-31
国家“十二五”科技支撑课题(2011BAC09B05)、德国政府贷款四川林业可持续经营项目(G1403083)和科技部2017年度项目(2017YFD0600302-05)资助
**通讯作者 Corresponding author (E-mail: lxw@sicau.edu.cn)

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更新日期/Last Update: 2020-09-10