Zhang Ge,Ye Changsheng.Effects of different habitat fragmentation processes on ecosystem services in Poyang Lake urban agglomeration[J].Research of Soil and Water Conservation,2025,32(05):329-340.[doi:10.13869/j.cnki.rswc.2025.05.002]
不同生境破碎化过程对环鄱阳湖城市群生态系统服务影响
- Title:
- Effects of different habitat fragmentation processes on ecosystem services in Poyang Lake urban agglomeration
- 文章编号:
- 1005-3409（2025）05-0329-12
- Keywords:
- habitat fragmentation; ecosystem services; InVEST model; Generalized Additive Model; Geodetector
- 分类号:
- F301.2； X321
- 文献标志码:
- A
- 摘要:
- [目的] 模拟生境破碎化过程及其对生态系统服务的差异化作用机制，为协调城市群发展与生态安全格局优化提供科学依据。[方法] 通过量化生境面积占比缩减、生境隔离度增加及生境边缘效应加剧3种关键生境破碎化过程，系统表征生境破碎化的空间特征，结合广义相加模型（GAMs）和地理探测器，深入分析不同破碎化过程对环鄱阳湖城市群生态系统服务功能变化的影响机制。[结果]（1）2005—2020年生境面积占比缩减、生境隔离度增加、生境边缘长度增加的网格占比分别为27.37%，37.64%和41.34%，且主要分布在南昌等城市中心城区范围。（2）碳储量和生境质量下降网格的空间分布与生境破碎化的空间分布相似，而产水量和土壤保持变化的空间分布由南向北逐渐增加，与生境破碎化过程分布规律不同。（3）不同的生境破碎化过程对不同生态系统服务具有线性或非线性影响。其中，生境面积占比缩减是最重要的破碎化过程，且生境破碎化对碳储量和生境质量存在显著影响，对产水量和土壤保持的影响则较小，这主要是因为这两个功能更多地受到气候因素如降水影响。[结论] 研究时段内，破碎化是环鄱阳湖城市群生境变化的主导过程，且对与土地利用密切相关的生态系统服务具有显著影响，研究结果可为区域生态格局优化与生态系统管理提供科学参考。
- Abstract:
- [Objective] To simulate habitat fragmentation processes and their differentiated impacts on ecosystem services, providing a scientific basis for coordinating urban agglomeration development and optimizing ecological security patterns. [Methods] Three key habitat fragmentation processes (habitat area reduction, increased habitat isolation, and intensified edge effects) were quantified to systematically represent spatial characteristics of habitat fragmentation. By using Generalized Additive Models (GAMs) and Geodetector, this study delved into the influence mechanisms of different fragmentation processes on the variations in ecosystem services in the Poyang Lake urban agglomeration. [Results](1) From 2005 to 2020, the proportions of grids experiencing habitat area reduction, increased habitat isolation, and increased habitat edge length were 27.37%, 37.64%, and 41.34%, respectively, primarily distributed in central urban areas such as Nanchang. (2) The spatial distributions of reduced carbon storage and habitat quality were similar to those of habitat fragmentation, while variations in water yield and soil retention showed an increasing trend from south to north, differing from the spatial patterns of habitat fragmentation.(3) Different habitat fragmentation processes had linear or nonlinear effects on different ecosystem services. Among them, habitat area reduction was the most critical process. Habitat fragmentation had significant effects on carbon storage and habitat quality, while its effects on water yield and soil retention were relatively minor, as these two functions are more strongly affected by climatic factors such as precipitation. [Conclusion] During the study period, fragmentation was the dominant process driving habitat variations in the Poyang Lake urban agglomeration, significantly affecting ecosystem services closely related to land use. These findings provide scientific references for optimizing regional ecological patterns and ecosystem management.
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备注/Memo
收稿日期：2024-10-30 修回日期：2024-12-09 接受日期：2024-12-22
资助项目：国家自然科学基金“环鄱阳湖城市群城镇化生态风险综合评价与预警研究”（42061041）
第一作者：张歌（1999—），女，河北省张家口人，硕士研究生，主要从事土地利用变化与规划。E-mail：15633608521@163.com
通信作者：叶长盛（1977—），男，江西临川人，教授，博士，研究方向城乡发展、土地资源利用与保护。E-mail：ycs519@163.com