Journal of East China Normal University(Natural Science) ›› 2024, Vol. 2024 ›› Issue (1): 68-78.doi: 10.3969/j.issn.1000-5641.2024.01.008

• Application of Ecological Purification Technology on Wetland • Previous Articles     Next Articles

Evaluation of the effectiveness of coastal ecological restoration based on emergy analysis: A case study from the Yingwuzhou Wetland

Rui DING1, Xuechu CHEN1,*(), Wenhui YOU1, Jiayu TU2   

  1. 1. School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
    2. Shanghai Jinshan District Marine Seawall Management Office, Shanghai 200540, China
  • Received:2023-01-20 Accepted:2023-03-24 Online:2024-01-25 Published:2024-01-23
  • Contact: Xuechu CHEN E-mail:xcchen@des.ecnu.edu.cn

Abstract:

Since the Yingwuzhou Wetland was established over five years ago, we have conducted comprehensive field investigation and monitoring. Constructing a reliable evaluation system with long-term monitoring data is important for the evaluation of coastal ecological restoration projects. Here, we used the emergy analysis method and collected the relevant data through field research, scientific monitoring, and literature review to construct an energy analysis structure chart and emergy value index system for the Yingwuzhou Wetland. The main emergy indexes, such as the natural assets and ecosystem services of the wetland, were analyzed, and its functional performance was compared for different restoration periods. The results show that the total emergy of the natural assets in the Yingwuzhou Wetland in 2021 was 8.92 × 1016 sej, which is equivalent to the emergy-monetary value of 2.247 × 105 yuan; the total emergy of ecosystem services was 8.88 × 1017 sej·a–1. After the implementation of restoration, the ecological quality of Yingwuzhou was significantly improved, and its natural assets and ecosystem service emergy were 5.01 and 5.73 times higher than those before restoration. The emergy self-support ratio (ESR) of the Yingwuzhou Wetland ecosystem was 0.47, and the emergy yield ratio (EYR) and emergy sustainable index (ESI) were 28.29 and 25.03, respectively, indicating that the wetland had high output efficiency and suitable space for sustainable development. This study shows that based on long-term monitoring data, the emergy analysis method can better reflect the effectiveness of coastal ecological restoration projects, and the evaluation system and method can provide reference for similar coastal restoration projects in the future.

Key words: coastal zone, ecological restoration, effectiveness evaluation, emergy analysis, the Yingwuzhou Wetland

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