植物生态学报 ›› 2025, Vol. 49 ›› Issue (11): 1778-1790.DOI: 10.17521/cjpe.2025.0099  cstr: 32100.14.cjpe.2025.0099

• 研究论文 • 上一篇    下一篇

半干旱矿区塌陷地光伏电站建设对植物群落特征的影响

杜华栋1,2,3, 王梦雨1, 聂文杰1,2,3,*(), 孙浩1, 车旭曦1, 唐勋1   

  1. 1西安科技大学地质与环境学院, 西安 710054
    2西安科技大学西部矿山生态环境修复研究院, 西安 710054
    3陕西省煤炭绿色开发地质保障重点实验室, 西安 710054
  • 收稿日期:2025-03-27 接受日期:2025-09-09 出版日期:2025-11-20 发布日期:2025-11-20
  • 通讯作者: *聂文杰(nwj@xust.edu.cn)
  • 基金资助:
    陕西省自然科学基础研究计划(2024JC-YBMS-234)

Influence of photovoltaic arrays construction on plant community characteristics in subsidence areas in semi-arid coal mining area

DU Hua-Dong1,2,3, WANG Meng-Yu1, NIE Wen-Jie1,2,3,*(), SUN Hao1, CHE Xu-Xi1, TANG Xun1   

  1. 1College of Geology & Environment, Xi’an University of Science and Technology, Xi’an 710054, China
    2Western Mine Ecological Environment Rehabilitation Research Institute, Xi’an University of Science and Technology, Xi’an 710054, China
    3Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an 710054, China
  • Received:2025-03-27 Accepted:2025-09-09 Online:2025-11-20 Published:2025-11-20
  • Supported by:
    Basic Research Program of Natural Science in Shaanxi Province(2024JC-YBMS-234)

摘要: 光伏阵列通过改变局部水热光条件并重塑地表土壤环境, 形成异质化的微环境梯度, 进而引发植物“生态位分化—优势种重组”效应, 塑造了差异化群落格局。为揭示“光伏+生态治理”工程实施后光伏建设对植被恢复的影响机制, 该研究以榆神府矿区采煤地表塌陷地光伏区为研究对象, 通过野外样方调查与多元统计方法, 对比光伏阵列不同微生境单元(板前、板下、板后和板间)、塌陷地自然恢复区和未塌陷地对照区植物群落组成、结构与稳定性特征, 并结合土壤理化性质和微气象因子解析群落分异的驱动机制。结果表明: (1)塌陷地自然恢复区植物群落多样性和稳定性较未塌陷地显著下降, 但由于一、二年生植物定植, 其植株密度增加。光伏板前、板后促进植物密度、多样性和稳定性提升, 而板下和板间呈现相反趋势。(2)板前和板后以耐旱多年生植物为主, 而板下微生境在遮阴和高湿环境筛选下, 植物群落以中生一二年植物为主, 物种组成与对照区相比其相似性较低。(3)土壤水分含量和光照强度是影响研究区群落特征的共性主导因子, 除此之外不同微生境的关键驱动因子还包括板前和板后的土壤有机质含量, 板下的空气湿度及板间的土壤容重等。总体来说, 光伏建设诱导了塌陷地植物群落结构的空间分异, 使植被恢复效益呈现显著异质性, 其中板前促进作用最强, 板后对塌陷地植被恢复促进作用有限, 板间和板下则表现出明显抑制效益。研究结果可为“光伏+生态治理”工程的精准生态优化提供关键科学依据。

关键词: 采煤地表塌陷, 光伏电站, 植被恢复, 植物群落结构, 生态效应

Abstract:

Aims Photovoltaic (PV) arrays facilitate the development of distinct plant assemblages by mediating local gradients of water, heat, light, and soil environment. This environmental heterogeneity induces a “niche differentiation-dominant species reorganization” effect among plant species in semi-arid coal mining subsidence areas. Consequently, there is an urgent need to elucidate the impacts of PV construction on the composition, diversity, and stability of plant community, as well as the driving mechanisms.

Methods To uncover the impact mechanisms of PV construction on vegetation restoration following the implementation of “PV + Ecological Remediation” project, this study investigated a PV field established on coal mining subsidence land in the Yushenfu mining area. By conducting field quadrat surveys and multivariate statistical analyses, we compared the characteristics of plant community composition, structure, and stability across distinct microhabitat units of the PV arrays (front eaves of the PV panel, underside of the PV panel, rear eaves of the PV panel and middle of the PV panel) with those in naturally recovered coal mining subsidence areas and in control areas (non-subsided lands). The driving mechanisms of community differentiation were analyzed by integrating soil physicochemical properties and microclimatic factors.

Important findings (1) The diversity and stability of plant communities significantly decreased in naturally recovered coal mining subsidence areas, while plant density increased due to the establishment of annuals and biennials. Compared to the naturally recovered areas, the front eaves and rear eaves of the PV panel enhanced plant density, diversity, and stability, whereas the underside and middle of the PV panel showed opposite trends. (2) Plant communities in the front and rear eaves of the PV panel were dominated by drought-tolerant perennial species. In contrast, the underside of the PV panel screened by shading and high humidity conditions, was primarily dominated by mesophytic annual and biennial species, showing reduced species similarity to control area. (3) Soil moisture and light intensity were common dominant environmental factors influencing community characteristics across the study area. Beyond these shared drivers, the key driving factors for different microenvironments included soil organic matter content in the front and rear eaves of the PV panel, air humidity underside of the PV panels and soil bulk density in the middle of the PV panel. Overall, the construction of the photovoltaic power station induced spatial differentiation in the plant community structure within the subsided land PV area, resulting in significant heterogeneity in vegetation restoration effectiveness. Among the microhabitat units, the front eaves of the PV panel exhibited the strongest promotive effect, while the rear eaves of the PV panel exhibited a limited promotive effect on vegetation restoration in the subsidence area. Conversely, the middle and underside of the PV panel showed significant inhibitory effects. These results provide a strong scientific basis for implementing targeted ecological optimization measures following the deployment of “PV + Ecological Remediation” projects.

Key words: coal mining subsidence, photovoltaic arrays, vegetation restoration, plant community structure, ecological effects