Ecological Security Evaluation for Marine Ranching Based on the PLTS/ANP Method: A Case Study of Rongcheng

Abstract

The evaluation index system of ecological security of marine ranching (MRES) is based on the assumption that there is independence among evaluation indexes in the existing studies, which ignores the complex interactive paths of marine ranching as an artificial ecosystem. In this study, the MRES evaluation network model that includes interdependent relationships is established based on the Driver-Pressure-State-Impact-Response model and the analytic network process method. Then, the probabilistic linguistic term sets and analytic network process methods are used to calculate the weights of the evaluation indexes of MRES. The overall evaluation value and the contribution rate of clusters are consequently defined and analyzed to reflect the performance of MRES. Finally, a case study is carried out for evaluating the MRES of marine ranches in Rongcheng by means of the proposed method. The conclusions are summarized as follows: (1) The weights of clusters are ranked as Responses > Impact > Driver > State > Pressure, and “scientific management of fishery resources” is the most important index; (2) the MRES performance of marine ranches in the city of Rongcheng is at the medium security grade on the whole, and all 11 samples are driven by the response.

The Effect of Marine Pastures on Green Aquaculture in China

“…In addition, the marine pasture is usually considered as a closed system, whose main feature is human intervention, and whose main purpose is the scientific and rational maintenance and utilization of human-oriented marine resources, so it can be regarded as an artificial closed system [11]. At present, the relevant research studies on marine pasture in China are gradually becoming mature, from the hard environment to the soft environment, from the site selection of marine pasture [12,13], properties of algal reef materials [14,15], and spatial layout [16,17] to modern marine pasture construction [15], ecological security assessment [18][19][20], and research on the key technologies of marine pasture [21,22]; from the emphasis on economic benefits to the consideration of both economic and ecological benefits, the analysis of potential economic benefits [23,24] to ecological benefits [25,26], and the measurement of comprehensive benefits [27,28]. In recent years, with the "two mountains theory" and the "two-carbon target" successively proposed, the academic community has focused on topics such as carbon sinks in marine pastures and fisheries [29,30], most scholars have measured the blue carbon sink with marine shellfish and algae as objects [31,32], and some scholars have also started from carbon sink pricing and incentive subsidies [33,34].…”

Spatiotemporal Dynamics of Agricultural Sustainability Assessment: A Study across 30 Chinese Provinces

“…Additionally, this study decomposes the agricultural sustainability level into dimensions to better reflect the changes in each dimension and their contributions to the overall level of agricultural sustainability. By calculating the contribution margin(CR), we can clearly distinguish the strengths and weaknesses of the dimensions that contribute to agricultural sustainability and make targeted improvements [52,53]; the formula is as follows:…”