Zhiduo Zhang, Geng He, Wenbo Cai, Qing Zhu, Xiao Liu, Fan Ding, Yongli Cai
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We then identified an appropriate landscape fragmentation index (LFI) that effectively captured the fragmentation essence. To determine the optimal scale, we adopted an experimental approach using both the moving window (MW) method and the semi-variance function. By constructing a LFI spatiotemporal sequence and conducting trend analysis, we identified the potential fragmentation areas (PFA) with significant fragmentation tendencies.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>The spatial planning constraints will (1) prevent the encroachment of construction land into 2.14 km<sup>2</sup> of cropland, 0.21 km<sup>2</sup> of forest, and 0.13 km<sup>2</sup> of grassland; (2) shift the highly fragmented area from the northeastern portion of Lushan to the planned area defined by the development boundary; (3) mitigate and decelerate the trend of landscape fragmentation in natural and semi-natural landscapes, decrease PFA by 7.74 km<sup>2</sup> and preserve 15.61 km<sup>2</sup> of natural landscapes. (4) still leave 29.42% of forest and 22.82% of grassland at risk of fragmentation.</p><h3 data-test=\"abstract-sub-heading\">Conclusions</h3><p>Spatial planning constraints will effectively control the potential fragmentation in natural and semi-natural landscapes by changing the spatial distribution of LFI and PFA. This control mechanism will greatly exclude the anthropogenic impact and ensure the conservation of habitats. 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引用次数: 0
摘要
背景生物多样性面临着快速城市化导致的景观破碎化的潜在威胁。研究景观破碎化的未来轨迹对于理解当前空间规划约束对自然和半自然栖息地保护、生态系统服务和可持续发展的影响至关重要。方法我们采用斑块生成土地利用模拟（PLUS）模型模拟并预测了两种不同情景下庐山市土地利用和景观格局的变化："规划约束（PC）"和 "自然发展（ND）"。然后，我们确定了适当的景观破碎化指数（LFI），以有效捕捉破碎化的本质。为了确定最佳尺度，我们采用了移动窗口法（MW）和半方差函数实验法。通过构建 LFI 时空序列并进行趋势分析，我们确定了具有明显破碎化趋势的潜在破碎化区域（PFA）。结果空间规划约束将（1）防止建设用地侵占 2.14 平方公里的耕地、0.21 平方公里的森林和 0.13 km2 的草地；(2) 将庐山东北部的高度破碎化区域转移到开发边界所界定的规划区域；(3) 缓解和减缓自然和半自然景观的景观破碎化趋势，减少 7.74 km2 的 PFA，保留 15.61 km2 的自然景观。(结论空间规划约束将通过改变 LFI 和 PFA 的空间分布，有效控制自然和半自然景观的潜在破碎化。这种控制机制将极大地排除人为影响，确保栖息地的保护。在未来的生态管理优化中，应重点关注保留在 PFA 范围内的栖息地。
Spatial planning constraints will mitigate the fragmentation trajectory of natural and semi-natural landscapes: a case of Lushan City, China
Context
The biodiversity faces an underlying threat from landscape fragmentation resulting from rapid urbanization. Examining the future trajectory of landscape fragmentation is imperative to understanding the impact of current spatial planning constraints on natural and semi-natural habitat preservation, ecosystem services, and sustainability.
Methods
We employed a Patch-generating Land Use Simulation (PLUS) model to simulate and predict the land use and landscape pattern changes in Lushan City under two distinct scenarios: “Planning Constraints (PC)” and “Natural Development (ND)”. We then identified an appropriate landscape fragmentation index (LFI) that effectively captured the fragmentation essence. To determine the optimal scale, we adopted an experimental approach using both the moving window (MW) method and the semi-variance function. By constructing a LFI spatiotemporal sequence and conducting trend analysis, we identified the potential fragmentation areas (PFA) with significant fragmentation tendencies.
Results
The spatial planning constraints will (1) prevent the encroachment of construction land into 2.14 km2 of cropland, 0.21 km2 of forest, and 0.13 km2 of grassland; (2) shift the highly fragmented area from the northeastern portion of Lushan to the planned area defined by the development boundary; (3) mitigate and decelerate the trend of landscape fragmentation in natural and semi-natural landscapes, decrease PFA by 7.74 km2 and preserve 15.61 km2 of natural landscapes. (4) still leave 29.42% of forest and 22.82% of grassland at risk of fragmentation.
Conclusions
Spatial planning constraints will effectively control the potential fragmentation in natural and semi-natural landscapes by changing the spatial distribution of LFI and PFA. This control mechanism will greatly exclude the anthropogenic impact and ensure the conservation of habitats. The habitats remaining within PFA should be focused in future eco-management optimization.
期刊介绍：
Landscape Ecology is the flagship journal of a well-established and rapidly developing interdisciplinary science that focuses explicitly on the ecological understanding of spatial heterogeneity. Landscape Ecology draws together expertise from both biophysical and socioeconomic sciences to explore basic and applied research questions concerning the ecology, conservation, management, design/planning, and sustainability of landscapes as coupled human-environment systems. Landscape ecology studies are characterized by spatially explicit methods in which spatial attributes and arrangements of landscape elements are directly analyzed and related to ecological processes.
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