Enhancing Wetland Landscape Connectivity through Multi-Factor Optimization: a Case Study in Maduo County, Qinghai Province, China

IF 1.8 4区 环境科学与生态学 Q3 ECOLOGY
Huiwu Zhang, Gang Liu, Jing He, Wanzhi Ye
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Abstract

Understanding the dynamic patterns of wetlands in the Yellow River basin and promoting connectivity among them are important for the protection and restoration of wetlands in this basin. Although many existing studies effectively optimize the structural characteristics of ecological networks, they often overlook the spatial distribution of the actual landscape to be optimized and the associated ecological risks. This study centers on Maduo County in Qinghai Province, employing the MSPA model and connectivity indices to meticulously analyze the spatial dynamics of wetland alterations and hydrological connectivity over the past two decades. The introduced concept of optimizing the importance index involves the stratification of low-connectivity wetland patches, identified as nodes for optimization. A theoretical assessment of the complexity and connectivity robustness of the river network before and after optimization was performed. Findings reveal: (1) The core area and connectivity of wetlands in Maduo County have exhibited persistent growth. The centroid of wetlands shifted southeastward in both periods, albeit at differing angles. (2) Hydrological connectivity of wetland patches in Maduo County experienced rapid enhancement from 2000 to 2010, maintaining stability from 2010 to 2020. (3) There are 44 nodes to be optimized, with 6, 13, and 25 nodes in levels 1, 2, and 3, respectively. As the number of levels increases, the nodes slated for optimization are more likely to be interconnected within the river network. Post-optimization, both the complexity and connectivity of the river network show improvement. The study will offer fundamental theoretical support for wetland research in the Yellow River Basin.

Abstract Image

通过多因素优化增强湿地景观连通性:中国青海省玛多县案例研究
了解黄河流域湿地的动态模式并促进湿地之间的连通性对于该流域湿地的保护和恢复具有重要意义。现有的许多研究虽然有效地优化了生态网络的结构特征,但往往忽略了需要优化的实际景观的空间分布以及相关的生态风险。本研究以青海省玛多县为中心,采用 MSPA 模型和连通性指数,细致分析了过去二十年中湿地变化和水文连通性的空间动态。引入的重要性指数优化概念包括对低连通性湿地斑块进行分层,将其确定为优化节点。对优化前后河网的复杂性和连接稳健性进行了理论评估。研究结果表明:(1) 玛多县湿地的核心面积和连通性呈现出持续增长的态势。两个时期的湿地中心点均向东南方向移动,但角度不同。(2) 2000 年至 2010 年,玛多县湿地斑块的水文连通性迅速增强,2010 年至 2020 年保持稳定。(3) 有 44 个节点需要优化,第 1、2 和 3 层分别有 6、13 和 25 个节点。随着级别的增加,需要优化的节点更有可能在河网内相互连接。优化后,河网的复杂性和连通性都有所改善。该研究将为黄河流域的湿地研究提供基础理论支持。
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来源期刊
Wetlands
Wetlands 环境科学-环境科学
CiteScore
4.00
自引率
10.00%
发文量
108
审稿时长
4.0 months
期刊介绍: Wetlands is an international journal concerned with all aspects of wetlands biology, ecology, hydrology, water chemistry, soil and sediment characteristics, management, and laws and regulations. The journal is published 6 times per year, with the goal of centralizing the publication of pioneering wetlands work that has otherwise been spread among a myriad of journals. Since wetlands research usually requires an interdisciplinary approach, the journal in not limited to specific disciplines but seeks manuscripts reporting research results from all relevant disciplines. Manuscripts focusing on management topics and regulatory considerations relevant to wetlands are also suitable. Submissions may be in the form of articles or short notes. Timely review articles will also be considered, but the subject and content should be discussed with the Editor-in-Chief (NDSU.wetlands.editor@ndsu.edu) prior to submission. All papers published in Wetlands are reviewed by two qualified peers, an Associate Editor, and the Editor-in-Chief prior to acceptance and publication. All papers must present new information, must be factual and original, and must not have been published elsewhere.
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