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黑鹳在中国的潜在时空分布模拟及其对未来气候变化的响应

Simulation of potential spatial-temporal distribution of Black Storks and their responses to future climate change scenarios in China

  • 摘要: 黑鹳(Ciconia nigra)是全球珍稀的湿地水生态指示物种,更是湿地生态系统的重要组成部分。采用Kuenm包对MaxEnt模型参数进行优化后建立最优模型,基于筛选后的839条分布数据和14个环境因子变量,模拟黑鹳在当前气候及未来2个时期(2041—2060年和2061—2080年)各2个气候情景(BCC-CSM2-MR-SSP126和BCC-CSM2-MR-SSP585)下的潜在适生区,揭示黑鹳在中国的时空分布对未来气候变化情景的响应规律,并进一步识别未来气候变化情景下黑鹳在中国高适生区质心的迁移方向。研究结果表明,黑鹳在中国的潜在地理分布是人类活动、海拔、栖息地湿地类型、铁路、道路、植被、降水等多种因素综合作用的结果。人类活动是黑鹳在中国地理分布的最主要影响因素,人类活动协同海拔梯度的变化及栖息地湿地类型对黑鹳的地理分布起主导作用。从当前气候至2061—2080年,黑鹳在中国的高适生区有一定程度的扩张或轻微收缩变化。总体上看,黑鹳在中国未来气候变化情境下的地理分布范围相对稳定,黑鹳对气候变化有一定的适应能力。与当前气候情景下的高适生区相比,未来SSP126和SSP585气候情景下黑鹳高适生区质心均整体先向西北迁移,后向南方迁移。未来高适生区整体上有向暖湿化的西北地区迁移的趋势。本研究可为黑鹳在气候变化和人类活动影响下的大尺度迁徙过程、格局和机制研究提供借鉴和启示。

     

    Abstract: Black Stork (Ciconia nigra), a globally rare wetland aquatic ecologically pivotal indicator species, plays an irreplaceable role in maintaining wetland ecosystem balance. This study utilized the Kuenm package to optimize the parameters of the MaxEnt model, created an optimal habitat suitability simulation. By employing 839 filtered occurrence records and 14 environmental variables, we modeled the potential suitable habitats for Black Stork under current climatic conditions and two future periods (2041-2060 and 2061-2080), each with two climate scenarios (BCC-CSM2-MR-SSP126 and BCC-CSM2-MR-SSP585). This study simulated the spatiote-mporal distribution patterns of Black Storks in China and their responses to future climate change scenarios, and further identified the directional shifts of high suitability centroids under future climate change scenarios. The findings indicated that the potential geographical distribution of Black Stork in China was a synergistic outcome influenced by multifarious factors, including anthropogenic activities, elevation, wetland habitat types, transportation networks, vegetation and precipitation. Anthropogenic activities emerged as the primary determinant of Black Stork’s geographic distribution in China, acting in concert with altitudinal gradients and wetland habitat types to predominantly shape its distribution patterns. From the current climate to the period of 2061-2080, the highly suitable areas for Black Stork in China exhibit a moderate expansion or slight contraction. Overall, the geographic range of Black Stork remains relatively stable under future climate change scenarios, indicating a certain degree of adaptability to climatic shifts. Compared to the current climate scenario, the centroids of highly suitable areas for Black Stork under future SSP126 and SSP585 climate scenarios initially migrate towards the northwest and subsequently towards the south. Future highly suitable areas exhibit an overall tendency to shift towards warmer and wetter northwestern regions. This research provides insights and implications for understanding the large-scale migration processes, patterns, and mechanisms of Black Stork under the influence of climate change and anthropogenic activities.

     

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