Assessment of biodiversity and landscape changes during the Pinglu Canal construction and the benefits of ecological restoration based on Rao's Q index

IF 3.9 2区环境科学与生态学 Q1 ECOLOGY

Ecological Engineering Pub Date : 2025-06-18 DOI:10.1016/j.ecoleng.2025.107709

Songwen Deng , Mengyuan Luo , Wenhuan Wang , Sixiang Lan , Weifeng Xu , Xuzhi Mai , Wei Zhang

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Abstract

Assessing biodiversity change is crucial for evaluating the ecological impacts of infrastructure development. Taking the Pinglu Canal as an example, this study integrates Rao's Q index, remote sensing data, and landscape metrics to analyze the ecological pattern changes and restoration benefits before and after canal construction from 2015 to 2024. Results indicated that canal construction significantly intensified fragmentation of forests, wetlands, and farmlands, resulting in about a 25 % decrease in Rao's Q index during the initial construction phase (2022), reflecting notable biodiversity loss. Following ecological restoration measures (such as afforestation compensation and wetland restoration) implemented in 2023–2024, Rao's Q showed differentiated recoveries across ecosystems, with forest ecosystems recovering by approximately 20 %, respectively. This research confirms that the Rao's Q index is suitable for evaluating biodiversity changes in heterogeneous landscapes but may overestimate biodiversity in homogeneous ecosystems like mangroves, thus necessitating correction through complementary metrics. The findings provide important theoretical support and practical references for ecological restoration planning in infrastructure projects.

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基于Rao’s Q指数的平鲁运河建设期间生物多样性、景观变化及生态修复效益评价

评估生物多样性变化对于评估基础设施发展的生态影响至关重要。以平鲁运河为例，综合Rao’s Q指数、遥感数据和景观指标，分析2015 - 2024年运河开凿前后生态格局变化及修复效益。结果表明，运河建设显著加剧了森林、湿地和农田的破碎化，导致Rao’s Q指数在运河建设初期（2022年）下降约25%，反映出明显的生物多样性损失。在2023-2024年实施生态恢复措施（如造林补偿和湿地恢复）后，Rao's Q显示不同生态系统的恢复存在差异，森林生态系统分别恢复了约20%。本研究证实，Rao’s Q指数适用于评价异质景观的生物多样性变化，但可能高估了红树林等同质生态系统的生物多样性，因此需要通过补充指标进行校正。研究结果为基础设施生态修复规划提供了重要的理论支持和实践参考。

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来源期刊

Ecological Engineering 环境科学-工程：环境

CiteScore

8.00

自引率

5.30%

发文量

293

审稿时长

57 days

期刊介绍： Ecological engineering has been defined as the design of ecosystems for the mutual benefit of humans and nature. The journal is meant for ecologists who, because of their research interests or occupation, are involved in designing, monitoring, or restoring ecosystems, and can serve as a bridge between ecologists and engineers. Specific topics covered in the journal include: habitat reconstruction; ecotechnology; synthetic ecology; bioengineering; restoration ecology; ecology conservation; ecosystem rehabilitation; stream and river restoration; reclamation ecology; non-renewable resource conservation. Descriptions of specific applications of ecological engineering are acceptable only when situated within context of adding novelty to current research and emphasizing ecosystem restoration. We do not accept purely descriptive reports on ecosystem structures (such as vegetation surveys), purely physical assessment of materials that can be used for ecological restoration, small-model studies carried out in the laboratory or greenhouse with artificial (waste)water or crop studies, or case studies on conventional wastewater treatment and eutrophication that do not offer an ecosystem restoration approach within the paper.