| 封育对干热河谷Savanna植物群落种间关联性的影响 |
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| 引用本文： | 何光熊,史正涛,闫帮国,杨淏舟,孙毅,王艳丹,余建琳,和润莲,史亮涛,方海东.封育对干热河谷Savanna植物群落种间关联性的影响[J].草业学报,2023,32(2):1-14. |
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| 作者姓名： | 何光熊 史正涛 闫帮国 杨淏舟 孙毅 王艳丹 余建琳 和润莲 史亮涛 方海东 |
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| 作者单位： | 1.云南师范大学地理学部，云南 昆明 650500;2.云南省农业科学院热区生态农业研究所，云南 元谋 651300;3.云南干热河谷植物园，云南 元谋 651300;4.云南省元谋县金雷国家水土保持科技示范园，云南 元谋 651300 |
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| 基金项目： | 云南省自然生态监测网络监测项目(2022-YN-18);云南省重点研发计划项目(2019BC001-02);国家自然科学基金项目(31460127) |
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| 摘 要： | 为探讨封育措施对干热河谷稀树灌草丛（Savanna）群落种间关系的影响，在金沙江干热河谷实施水土保持封育20年的区域及其周边区域设置封育区和干扰区样地开展植被调查，应用方差比率（VR）法、χ2检验结合Jaccard指数法以及Spearman秩相关系数法对25个优势物种的种间关系进行比较分析。结果表明：封育导致稀树灌草丛群落组成及结构发生明显变化，有助于橘草等多年生乡土禾草的生长，促进假杜鹃（Bc）、清香木（Pw）和地檀香（Gf）等一些木质化程度较高的物种留存，同时抑制一年生物种、杂草类物种和外来物种的出现，在群落中形成多个建群物种；干热河谷稀树灌草丛群落总体种间联结以正联结为主，封育促进群落形成更加复杂的种间联结关系；相较于封育区，干扰区群落物种间存在较高的资源竞争或生态关系的相互排斥，促进一年生物种、杂草类物种和外来物种间形成较强的正联结关系，形成以黄茅为代表的单优势建群种群落，而封育区群落总体种间关系呈现显著正联结状态，促进豆科物种、木质化物种、乡土物种间形成正联结关系，优势物种间正负相关关系同时加强。以上结论表明，封育措施对干热河谷稀树灌草丛优势植物种间关系有重要影响，通过影响植...
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| 关 键 词： | 种间联结 种间关系 生态种组 封育 |
| 收稿时间： | 2022-02-18 |
| 修稿时间： | 2022-06-06 |
Effects of fencing enclosure on interspecific associations in a Savanna grassland community in China’s arid-hot valley region |
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| Guang-xiong HE,Zheng-tao SHI,Bang-guo YAN,Hao-zhou YANG,Yi SUN,Yan-dan WANG,Jian-lin YU,Run-lian HE,Liang-tao SHI,Hai-dong FANG.Effects of fencing enclosure on interspecific associations in a Savanna grassland community in China’s arid-hot valley region[J].Acta Prataculturae Sinica,2023,32(2):1-14. |
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| Authors: | Guang-xiong HE Zheng-tao SHI Bang-guo YAN Hao-zhou YANG Yi SUN Yan-dan WANG Jian-lin YU Run-lian HE Liang-tao SHI Hai-dong FANG |
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| Institution: | 1.Department of Geography，Yunnan Normal University，Kunming 650500，China;2.Institute of Tropical Eco-agricultural Sciences，Yunnan Academy of Agricultural Sciences，Yuanmou 651300，China;3.Yuanmou Dry-hot Valley Botanical Garden，Yuanmou 651300，China;4.National Soil and Water Conservation Science and Technology Demonstration Park of Yunnan Yuanmou Jinlei，Yuanmou 651300，China |
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| Abstract: | This research studied the effects of fencing enclosure on interspecific associations in a Savanna grassland plant community. Fencing enclosure and disturbed areas were set up and maintained for 20 years to facilitate investigation of vegetation and water and soil conservation techniques in the arid-hot valley region surrounding the Jinsha River， and 25 dominant species from the two zones were selected as marker plants to calculate interspecific association indexes using the variance ratio （VR） method， chi-square testing， Jaccard index and Spearman rank correlational methods. Findings included the following. Enclosure resulted in obvious changes in the community composition and structure and nurtured the growth of native herbs such as like Cymlopogon goeringii （Cg）， and promoted the establishment of more lignified species such as Barleria cristata （Bc）， Pistacia weinmanniifolia （Pw）and Gaultheria forrestii （Gf）， while inhibiting annual species， weed species and alien species， resulting in the emergence of a plant community dominated by constructive species. The overall interspecific association of Savanna grassland community in arid-hot valley was mainly positive， and enclosure facilitated the formation of more complex interspecific associations within the plant community. In disturbed areas， a strong positive association between annual species， weed species and alien species was strongly evident and a high resource competition or mutual ecological exclusion was stronger among community species， resulting in a single dominant species community represented by Heteropogon contortus （Hc）. Overall the interspecific relationships in the enclosed area showed a significant positive association， with the formation of a positive association among leguminous species， lignified species and native species， while the positive and negative correlations among dominant species was also strengthened after enclosure. These results suggest that fencing enclosure has a significant effect on the relationship between dominant species in Savanna grassland from the arid-hot valley zone， affecting the species composition and functional group structure of the plant community. The resulting enhancement of the interaction between dominant species appears to be ecologically important. |
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| Keywords: | interspecific association interspecies relationship ecological groups enclosure |
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