The Impact of Enclosure on Vegetation Ecological Niche and Interspecific Associations in Inner Mongolian Desert Steppe

doi:10.11733/j.issn.1007-0435.2026.03.024

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (3): 1007-1016.DOI: 10.11733/j.issn.1007-0435.2026.03.024

The Impact of Enclosure on Vegetation Ecological Niche and Interspecific Associations in Inner Mongolian Desert Steppe

MI Yu-qing^1,2, XU Hong-bin¹, ZHANG Lei¹, TANG Yue-kun³, AO Hu-richa¹, WEN Du-rigen⁴, LI Ai-lan⁵

1. Inner Mongolia Academy of Forestry Sciences, Hohhot, Inner Mongolia 010010, China;
2. College of Ecology and Environment, Inner Mongolia University, Hohhot, Inner Mongolia 010021, China;
3. Tongliao Forest Park Management Center, Tongliao, Inner Mongolia 028000, China;
4. Grassland Workstation of Zhenglan Banner, Xilingol, Inner Mongolia 027200, China;
5. Agricultural and Animal Husbandry Technology Extension Center of Shangdu County, Ulanqab, Inner Mongolia 013450, China

Received:2025-05-08 Revised:2025-07-18 Published:2026-03-23

围封对内蒙古荒漠草原植被生态位及种间联结性的影响

米雨晴^1,2, 许宏斌¹, 张雷¹, 唐月坤³, 敖胡日查¹, 温都日根⁴, 李艾兰⁵

1. 内蒙古自治区林业科学研究院, 内蒙古呼和浩特 010010;
2. 内蒙古大学生态与环境学院, 内蒙古呼和浩特 010021;
3. 通辽市森林公园管护中心, 内蒙古通辽 028000;
4. 正蓝旗草原工作站, 内蒙古锡林郭勒 027200;
5. 商都县农牧业技术推广中心, 内蒙古乌兰察布 013450

通讯作者: 许宏斌，E-mail：xhb1686@163.com
作者简介:米雨晴（2001-），女，汉族，河北保定人，硕士研究生，主要从事生态环境工程方面的研究，E-mail：miyuqing2023@163.com；
基金资助:
内蒙古自治区“揭榜挂帅”项目（2024JBGS0020）；内蒙古自治区林业科学研究院科研能力提升“揭榜挂帅”项目（2024NLTS03）；内蒙古自治区种业科技创新重大示范工程“揭榜挂帅”项目专题“乡土草良种推广与应用”（2022JBGS0040 0402）资助

Abstract

Abstract: In order to reveal its effectiveness as an ecological restoration measure and the state of community succession， this study took the vegetation of a desert steppe in Inner Mongolia enclosed for 22 years as the research object. And the effect differences of long-term enclosure on plant community species diversity， species niche characteristics， and interspecific associations were compared and analyzed between the enclosed site and the control site. The main results showed that under the enclosure treatment， the number of plant community species， the Margalef diversity index， the Shannon-Wiener diversity index， the Simpson richness index， and the Pielou evenness index all increased significantly. The important value and niche breadth of perennial herbs increased significantly， while the important value and niche breadth of degradation indicator species such as Neopallasia pectinata decreased significantly. The number of plant species pairs with niche overlap values greater than 0.2 and 0.5 increased to varying degrees. Interspecific association analysis based on the Pearson correlation coefficient， the interspecific association coefficient AC test， and the Spearman rank correlation test indicated that the overall interspecific association in the plant community of the enclosed site showed a non-significant negative correlation and the interspecific associations were weak. In conclusion， long-term enclosure significantly increased plant diversity in the desert steppe， optimized species composition， and improved plant utilization efficiency of environmental resources. However， the weak interspecific associations and the non-significant negative overall correlation indicate that the community is still in an unstable successional stage after 22 years of enclosure， and its long-term stability and restoration effectiveness require further attention.

Key words: Desert steppe, Enclosure, Important values, Ecological niche, Interspecific associations

摘要： 为评估长期围封对内蒙古荒漠草原植物群落物种多样性、物种生态位特征及种间联结性的影响，以揭示其作为生态恢复措施的有效性及群落演替状态，本研究以围封22年的荒漠草原植被为研究对象，对比分析了围封样地与对照样地的差异。主要结果表明：围封处理下，植物群落物种数、Margalef 多样性指数、Shannon-Wiener 多样性指数、Simpson 丰富度指数和 Pielou 均匀度指数均显著增加；多年生草本的重要值和生态位宽度显著增加，而栉叶蒿（Neopallasia pectinata）等退化指示性物种的重要值和生态位宽度显著降低。生态位重叠值大于0.2和0.5的植物物种对均有不同程度增加。基于 Pearson 相关系数、种间关联系数 AC 检验和 Spearman 秩相关检验的种间联结性分析表明，围封样地植物群落总体联结性呈不显著负相关关系且种间联结性较弱。综上，长期围封显著增加了荒漠草原植物多样性，优化了物种组成并提高了植物对环境资源的利用效率。然而，群落种间关联性弱且总体联结性呈不显著负相关，表明围封22年后群落仍处于不稳定的演替阶段，其长期稳定性和恢复效果需进一步关注。

关键词: 荒漠草原, 围栏封育, 重要值, 生态位, 种间联结性

CLC Number:

S812

MI Yu-qing, XU Hong-bin, ZHANG Lei, TANG Yue-kun, AO Hu-richa, WEN Du-rigen, LI Ai-lan. The Impact of Enclosure on Vegetation Ecological Niche and Interspecific Associations in Inner Mongolian Desert Steppe[J]. Acta Agrestia Sinica, 2026, 34(3): 1007-1016.

米雨晴, 许宏斌, 张雷, 唐月坤, 敖胡日查, 温都日根, 李艾兰. 围封对内蒙古荒漠草原植被生态位及种间联结性的影响[J]. 草地学报, 2026, 34(3): 1007-1016.

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The Impact of Enclosure on Vegetation Ecological Niche and Interspecific Associations in Inner Mongolian Desert Steppe

围封对内蒙古荒漠草原植被生态位及种间联结性的影响

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