海洋产业协同集聚形成机制与空间外溢效应

Formation Mechanism of Co-Agglomeration of Marine Industries and Spatial Spillover Effects

利用修正后的E-G系数对中国海洋产业协同集聚的空间演化特征进行分析,并对影响因素进行了探索,借助Moran’s I指数探讨了空间外溢效应。研究表明:1海洋产业协同集聚具有空间分异显著、空间连续性增强以及"单中心"与"多中心"交替转换等特征,而且分为空间大尺度变迁、邻近地理变迁和空间更加集中变迁三种类型;2知识外溢和海陆联动有助于海洋二三产业协同集聚,周边地区的海洋经济发展对本地区的海洋产业协同集聚形成也有积极作用;3运输成本的阀值的存在使得海洋产业从协同集聚向空间分离转换,促使海洋产业间从以互补效应为主向以挤出效应为主转变;4海洋产业协同集聚存在空间外溢效应,并受区域边界约束,其中,长三角海洋产业协同集聚在500km范围内存在溢出效应,珠三角的作用范围限于广东省内,而京津唐的辐射范围只有75km。

This paper mainly focuses on coagglomeration of marine industries and spatial spillover effects based on the revised E-G index and Moran＇ s I index. The results show that, the spatial evolution of coagglomeration of marine industries has the following characteristics： evident spatial differentiation, spatial continuity and self-organization gradually increased as well as the ＂single-center＂ and ＂multi-center＂ alternate conversion. Knowledge spillover and linkage of land and sea marine industries helps improve concentration degree, and the surrounding area has positive effect on region＇ s concentration degree. There is a threshold of transport cost that can make the coagglomeration of marine industries convert to spatial separation. Coagglomeration of marine industries has spatial spillover effects, constrained by spatial boundary, among them, the Yangtze River Delta region has spatial spillover effect in 500km range in scope, the spatial overspill effects in Pearl River Delta exists in Guangdong province, and region scope of Beijing-Tianjin-Tangshan is only 75 km.