基于InVEST-图论模型的西双版纳州亚洲象生境网络评价
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国家自然科学基金项目(51868028)


Evaluation of Asian elephant habitat network in Xishuangbanna based on InVEST-Graph Theory model
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    摘要:

    在大力推进生物多样性保护工作的背景下,亚洲象的活动范围与人类生产生活空间不断重叠,人象冲突矛盾日益严重,对物种栖息地生境网络进行优化能从源头缓解这一矛盾。在亚洲象国家公园建设之际,研究以西双版纳州为例,提出了一种基于InVEST-图论复合模型识别并优化生境网络的方法:即以土地利用数据为基础,结合亚洲象生活习性与栖息地偏好,通过海拔、坡度、距水源距离3个约束因子矫正生境质量数据,运用Graphab软件识别潜在生境网络,结合最小累积阻力模型理念与景观图论的分析方法,从"源地-廊道"角度定量化分析西双版纳州国家级亚洲象保护区的保护空缺,探讨保护区的空间布局优化策略与生境分级保护策略,以期为亚洲象国家公园的建设与西双版纳州国土空间规划提供新视角。结果表明,西双版纳州共识别出生态源地335个,总面积4595.60km2,总体上高质量生境分布较为均衡,连通性较好的生境网络集中分布在北部与东部区域,中部B4勐仑片区存在较为显著的生态孤岛现象,西南部高质量生境斑块小而破碎,联系紧密但缺少作为核心栖息地的大面积生境。保护空缺方面,国家级保护区范围内的生态源地仅占总源地面积的31.68%,大型保护空缺集中分布于B3勐养片区东北部;优化后的生境网络能形成以B3勐养片区为核心,以国家自然保护区为主的"B5-A-B3-B4-B1-B2"生物迁徙廊道。

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    In the context of advancing biodiversity conservation efforts, the overlapping territories of Asian elephants and human activities have led to an increasing conflict between them. Optimizing species habitat networks can alleviate this contradiction from the source. This paper, taking Xishuangbanna as a case study, proposes a method for identifying and optimizing habitat networks based on the InVEST-Graph Theory composite model at the time of establishment of Asian Elephant National Park. Leveraging land-use data, incorporating insights into Asian elephant behavior and habitat preferences, the approach modifies habitat quality data through three critical factors: elevation, slope, and distance from water sources. Using Graphab software to identify potential habitat networks and combining the Minimum Cumulative Resistance Model concept with component analysis methods from landscape graph theory, this study quantitatively analyzes protection gaps within Xishuangbanna's national-level Asian elephant conservation area from the perspective of "source-corridor." It explores spatial layout optimization strategies and habitat classification protection strategies for the conservation area, with the aim of offering a perspective for the development of Asian Elephant National Parks and Xishuangbanna's territorial spatial planning. The results indicate that a total of 335 ecological source sites were identified in Xishuangbanna, covering a combined area of 4595.60 km2. Overall, high-quality habitats are relatively evenly distributed, with well-connected habitat networks concentrated in the northern and eastern regions. There is a significant ecological island phenomenon in the central B4 Menglun area, and the high-quality patches in the southwest are small and fragmented, lacking large contiguous habitats as core habitat areas. Regarding protection gaps, ecological source sites within the national-level conservation area account for only 31.68% of the total source site area, with large protection gaps concentrated in the northeastern part of the B3 Mengyang area. The optimized habitat network has the potential to establish a "B5-A-B3-B4-B1-B2" biological migration corridor, centered around the B3 Mengyang area and focusing on the national nature reserve.

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魏雯,唐安琪.基于InVEST-图论模型的西双版纳州亚洲象生境网络评价.生态学报,2024,44(12):5206~5218

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