中文摘要：

产业链分工是地域分工的演变趋势。由于汽车产业生产组织的特点和较高的产业链迂回程度,选择汽车产业发育较为成熟的长江三角洲地区,进行产业链地域分工的实证研究。首先把汽车制造产业链划分为一般零部件制造、总成与分总成、整车制造与改装3个生产区段,然后对各生产区段生产产值的地域分布进行空间分析和定量计算,概括长江三角洲产业链地域分工的特点。空间分析表明：20世纪末期以来,地域分工的形态和内容已经表现出新的变化特征,低区段生产单元的空间布局更加分散;不同生产区段的组合主要表现为两种形式,即本地组合和近域推进;低区段生产向外扩散以近域扩散为主。借鉴生态位宽度和生态位重叠方法进行定量研究后发现,1990～2005年间的长江三角洲地区汽车产业三大区段间的地域分工程度虽然较低,但已经有一定发展,主要表现为整车生产与改装区段的空间分布相对集中,总成与分总成尤其是零部件生产则呈现出向外扩散的发展趋势。

英文摘要：

The spatial separation is the important tendency of the organizing model in the process of product manufacturing.It is of great theoretical and practical significance to explore the methods of the quantitative measurement and demonstrate the general characters of spatial pattern of the intra-product specialization.The paper takes the Yangtze River Delta Region（YRDR） as an example,where the auto manufacturing industry growth is more mature than elsewhere in China and the diffusion and re-combination of its production sector is very active.According to the producing process,the automobile industry chain is divided into three sections,namely the Parts Manufacturing（PM） section,the Parts Assembly（PA） section and the Complete and Re-assembled Vehicle Manufacturing（CRVM） section respectively.After calculation of every section＇s output value of each county in YRDR and comparison of the changes among different periods,this article summarizes the spatial evolution process of auto manufacturing chain in YRDR.The spatial process from 1990 to 2005 evaluated by the method of niche width and niche overlap shows that：（1） the diffusing performance of the three sections differs from each other.Unlike the CRVM section＇s diffusing at first and then concentrating,the PM section diffuses all along and moves faster than the PA section which also spreads through the study period;（2） the niche overlap among the three sections are relatively high and have somewhat decreased,which demonstrates that the combination between them is somehow prevalent.To some extent,the combination between CRVM section and PA section is increasing.However,the phenomenon of coupling CRVM section and PM section,especially PA section and PM section is lessening.