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周晓果,温远光,王磊,孙冬婧,明安刚,贾宏炎,朱宏光,赵岩岩,李锦良,黄勇杰,梁佳.岩溶石漠化不同修复林分林下植被和植物多样性的变化[J].广西科学,2022,29(1):71-87. [点击复制]
- ZHOU Xiaoguo,WEN Yuanguang,WANG Lei,SUN Dongjing,MING Angang,JIA Hongyan,ZHU Hongguang,ZHAO Yanyan,LI Jinliang,HUANG Yongjie,LIANG Jia.Changes in Understory Vegetation and Plant Diversity of Different Restoration Stands in Karst Rocky Desertification[J].Guangxi Sciences,2022,29(1):71-87. [点击复制]
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| 岩溶石漠化不同修复林分林下植被和植物多样性的变化 |
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周晓果1, 温远光1,2, 王磊2, 孙冬婧1, 明安刚3, 贾宏炎3, 朱宏光2, 赵岩岩1, 李锦良4, 黄勇杰1, 梁佳1
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| (1.广西科学院生态环境研究所, 广西南宁 530007;2.广西大学林学院, 广西森林生态与保育重点实验室, 广西南宁 530004;3.中国林业科学研究院热带林业实验中心, 广西凭祥 532600;4.南宁市武鸣区城厢镇农林水利综合服务中心, 广西南宁 530199) |
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| 摘要: |
| 为阐明岩溶石漠化不同修复林分林下植被和植物多样性特征及其变化规律，选择2011年营造的顶果木(Acrocarpus fraxinifolius)纯林、降香黄檀(Dalbergia odorifera)纯林和顶果木×降香黄檀混交林以及灌丛为研究对象，设置固定监测样地，基于2013年、2015年、2019年、2021年的4次植被调查，研究了灌丛和3种修复林分林下植被和多样性的动态变化。结果表明，3种修复林分灌木层植物科、属、种数目呈递增趋势，草本层的变化很小；灌丛中灌木层植物的科、属、种数目呈递减趋势，草本层植物却呈增加趋势；不同类型、不同年份灌木层和草本层植物总个体数存在显著差异。3种修复林分灌木层的优势种为黄荆(Vitex negundo)、苎麻(Boehmeria nivea)、金花茶(Camellia petelotii)，重要值分别变化于11.59-23.91、5.89-28.48和9.04-11.61，灌丛的优势种为黄荆、苎麻和地桃花(Urena lobata)，重要值分别变化于37.04-41.99、2.28-11.90和0-11.70 (个别年份除外)。3种修复林分草本层的优势种为蔓生莠竹(Microstegium fasciculatum)、肾蕨(Nephrolepis cordifolia)，重要值分别变化于3.20-39.64、3.20-31.48，灌丛的优势种为臭根子草(Bothriochloa bladhii)、肾蕨、兰香草(Caryopteris incana)，重要值分别变化于3.21-22.65、0-38.38、2.29-12.51。3种修复林分灌木层的Shannon-Wiener指数、Simpson指数和Pielou均匀度指数呈先减少后增加再减少的趋势，而灌丛却呈先陡然减少后急速增加的趋势；3种修复林分与灌丛之间灌木层和草本层的Sφrensen指数和Cody指数均随林龄增加而增加。群落中物种数量的波动通常为偶见种或稀有种的增加和减少引起，优势种个体数量的增加和减少也会引起波动。人工林修复类型与灌丛共有物种数持续减少，群落演替速率持续升高。修复林分对环境的改善效应促进了林下植物多样性的增加。 |
| 关键词: 石漠化 植被修复 物种组成 物种多样性 群落动态 |
| DOI：10.13656/j.cnki.gxkx.20220311.006 |
| 投稿时间：2021-12-13 |
| 基金项目:广西重点研发计划项目(2018AB40007)和国家自然科学基金项目(31860171，32160358)资助。 |
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| Changes in Understory Vegetation and Plant Diversity of Different Restoration Stands in Karst Rocky Desertification |
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ZHOU Xiaoguo1, WEN Yuanguang1,2, WANG Lei2, SUN Dongjing1, MING Angang3, JIA Hongyan3, ZHU Hongguang2, ZHAO Yanyan1, LI Jinliang4, HUANG Yongjie1, LIANG Jia1
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| (1.Institute of Eco-Environmental Research, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China;2.Key Laboratory of Forest Ecology and Conservation of Guangxi, Forestry College, Guangxi University, Nanning, Guangxi, 530004, China;3.Experimental Center of Tropical Forestry, Chinese Academy of Forestry, Pingxiang, Guangxi, 532600, China;4.Agriculture, Forestry and Water Resources Service Center of Chengxiang Town, Wuming District, Nanning, Guangxi, 530199, China) |
| Abstract: |
| In order to clarify the characteristics and the change rules of understory vegetation and plant diversity of different restoration stands in Karst rocky desertification, the pure Acrocarpus fraxinifolius platation(PAFP), pure Dalbergia odorifera plantation(PDOP), mixed A.fraxinifolius×D.odorifera plantation (MADP) and the shrub land (SL) constructed in 2011 were selected as the research objects.Based on four continuous vegetation survey in 2013, 2015, 2019 and 2021, the dynamic changes of understory vegetation and diversity in the shrub land and the three restoration stands were studied by setting a fixed monitoring sample plot.The results showed that the number of families, genera and species in shrub layer of the three restoration stands showed an increasing trend, and the change in herb layer was small.The number of families, genera and species in shrub layer showed a decreasing trend, while that in herb layer showed an increasing trend.There were significant differences in the total individual number of shrub layer and herb layer in different types and different years.The dominant species of shrub layer in the three restoration stands were Vitex negundo, Boehmeria nivea and Camellia petelotii, and their important value ranged from 11.59-23.91, 5.89-28.48 and 9.04-11.61, respectively.The dominant species of shrub layer in the shrub land were V.negundo, B.nivea and Urena lobata, and their important value varied between 37.04-41.99, 2.28-11.90, and 0-11.70 (except for individual years).The dominant species of herb layer in the three restoration stands were Microstegium fasciculatum and Nephrolepis cordifolia, and their important value ranged from 3.20-39.64 and 3.20-31.48, respectively.The dominant species in the shrub land were Bothriochloa bladhii, N.cordifolia and Caryopteris incana, and their important value varied between 3.21-22.65, 0-38.38, and 2.29-12.51.The Shannon-Wiener index, Simpson index and Pielou evenness index of the shrub layer in the three restoration stands showed a trend of first decreasing, then increasing and then decreasing, while the shrub land showed a trend of first sharply decreasing and then rapidly increasing.The Sφrensen index and Cody index of the shrub layer and the herb layer increased with the increase of stand age between the three restoration stands and shrub land.The fluctuation of species number in communities was usually caused by those increased and reduced occasional or rare species, and the increase and decrease of individual number of dominant species could also cause fluctuation.The restoration types of plantations and the number of common species in the shrub land continued to decrease, and the community succession rate continued to increase.The improvement effect of restoration stands on the environment promoted the increase of understory plant diversity. |
| Key words: rocky desertification vegetation restoration species composition species diversity community dynamics |
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