河北典型滨海湿地生态系统健康评价方法构建与应用研究

Construction and application of an ecosystem health assessment method for typical coastal wetlands in Hebei

  • 摘要: 明晰生态系统健康水平是推进区域保护性管理的基础。然而, 目前缺乏针对滨海湿地健康水平的综合定量研究, 传统评价方法难以做到在客观揭示湿地生态系统健康水平的同时, 实现生态系统服务评价与区域自然健康水平评价的有效衔接。本研究考虑湿地特殊性, 对活力-组织力-恢复力-生态系统服务生态系统健康评价模型(VORS model)进行改进, 并以河北六大典型滨海湿地(海兴湿地、南大港湿地、曹妃甸湿地、滦河口湿地、七里海潟湖湿地和北戴河湿地)为例, 评价其生态系统健康水平。研究结果表明: 河北省六大典型滨海湿地健康指数为0.50~0.64, 健康湿地所占面积为六大典型滨海湿地总面积的93.47%, 占主导地位, 其湿地健康水平主要受湿地类型影响。从4项健康评估指标来看, 六大典型滨海湿地活力状况在空间上分布不均, 水质与土壤条件差异明显, 植被覆盖总体偏低; 组织力分异明显, 指数跨度为0.43; 恢复力指标表现最佳(0.65~0.72), 空间差异小; 生态系统服务总价值达30.06亿元, 水文调节服务价值占49.53%。本研究基于VORS模型构建了适用于湿地生态系统的健康评价模型, 该模型有效改善了原有滨海湿地健康标准不清、结果易受主观干扰等不足, 为生态系统健康评价领域拓展了新思路。在此基础上, 本研究成果也可为河北滨海湿地保护与管理实践提供参考, 以进一步助推该区域生态与社会经济的协调发展。

     

    Abstract: Clarifying the level of ecosystem health is widely recognized as the foundation for promoting regional protective management. However, a comprehensive quantitative assessment specifically targeting the health status of coastal wetlands remains lacking. Conventional evaluation methods not only are limited in their ability to objectively reveal wetland ecosystem health but also fail to establish an effective linkage between ecosystem service evaluation and regional natural health assessment. In this study, the vigor-organization-resilience-ecosystem service (VORS) model was adopted and systematically improved by incorporating the unique characteristics of coastal wetlands, including water environment, species richness, and important landscape connectivity. Six typical coastal wetlands in Hebei Province were selected, and their ecosystem health levels were evaluated via the modified model. The results showed that the ecosystem health index of the six typical coastal wetlands in Hebei Province ranged from 0.50 to 0.64, and the area classified as healthy wetlands accounted for 93.47% of the total area of the six wetlands, indicating a dominant role of healthy wetlands. The health of the wetlands was primarily influenced by wetland type. From the four health assessment indicators, the vigor status of the six typical coastal wetlands was uneven in space, with significantly different water quality and soil conditions and low vegetation coverage. The organization differentiation was obvious, with the index span of 0.43. The resilience index showed the best performance (0.65–0.72), with small spatial differences. The total value of ecosystem services reached 3.006×109 ¥, in which the value of hydrological regulation services accounted for 49.53%. On the basis of the modified VORS model, a health assessment framework specifically suitable for wetland ecosystems was constructed. This framework effectively addressed the major limitations — unclear criteria and susceptibility to subjective interference — of previous coastal wetland health evaluation systems, thereby offering new insights and methodological advances for ecosystem health assessment. The improvements made in this study, especially the integration of wetland-specific indicators into the VORS model, enhanced the objectivity and comparability of the assessment results. Furthermore, the findings provide practical references for the conservation and management of coastal wetlands in Hebei Province. It is recommended that regular monitoring of vigor indicators be conducted to enable early detection of ecosystem degradation, and priority should be given to landscape-level restoration measures in areas with low health indices. In addition, strengthening the hydrological regulation function of coastal wetlands is suggested as a nature-based solution for regional water security. Overall, this study contributes to the coordinated achievement of ecological and socio-economic objectives in the Hebei coastal region.

     

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