基于适宜性和生态网络的沿海滩涂农渔业利用空间优化OA北大核心CSTPCD

Optimizing the layout of agricultural and fishery land utilization space in coastal tidal flats is an essential step in promoting the construction of"Blue Granary"and the sustainable utilization of tidal flat resources.Based on remote sensing and GIS technology,this study revealed the evolution characteristics of agricultural and fishery spatial utilization pattern in the tidal flat reclamation area in the southern Yellow River Delta from 1995 to 2020,as well as combined ecological suitability assessment,ecological network construction,and land use change model.The main land use change pattern of tidal flat agriculture and fishery under different development scenarios in 2035 was predicted by simulation and suggestions for spatial layout optimization and adjustment were proposed.The results showed that:during the study period,the total area of agricultural planting and mariculture utilization of tidal flats increased first and then decreased,which grew from 924.62 km2 in 1995 to 1 224.96 km2 in 2004,with the scale beginning to decrease after 2004,and dedined to 1 129.38 km2 in 2020.The spatial distribution pattern of paddy field and aquaculture pond changed noticeably,as did the spatial aggregation of dry land,the open aquaculture in the sea area gradually expanded away from the coast,and the spatial distribution of main agricultural and fishery utilization in the tidal flat area demonstrated clear land-sea gradient differentiation.The current distribution of agricultural planting and mariculture is ecologically suitable,however,the future growth space of agricultural planting is limited,and the development potentials of beach pond aquaculture and open aquaculture remain certain.Strict environmental protection measures for wetlands limit the expansion of agricultural planting and mariculture utilization space.The land use scale of beach agricultural planting and mariculture will increase significantly under the development scenario of agriculture and fishery,however,attention must be paid to the rational development of unused land,the improvement of the ecological connectivity of beach land and sea,and the application and promotion of efficient ecological agricultural planting and mariculture utilization model.The results may provide decision support for the high-quality agriculture and fishery development in the Yellow River Delta.