Li, Y. and Zhang, X.Q., 2020. The relationship among social media usage, social capital and job performance based on coastal area in China. In: Guido Aldana, P.A. and Kantamaneni, K. (eds.), Advances in Water Resources, Coastal Management, and Marine Science Technology. Journal of Coastal Research, Special Issue No. 104, pp. 978–983. Coconut Creek (Florida), ISSN 0749-0208.

This study aims to examine the impact of social media usage on employees' job performance in Minnan coastal area organizations. A total of 496 employees were asked to complete self-report questionnaires in this study. Based on the social capital theory, the samples were analyzed to measure their social media usage, social capital, job performance and network heterogeneity. The results were as follows: (1) Social media usage had significant direct effect on employees' job performance and would exert influence through the mediating role of social capital. (2) Employees' social media usage and social capital were regulated by their network heterogeneity. (3)The mediating effect of social capital on social interactions and job performance were moderated by their network heterogeneity. The study highlights the mediating effect of social capital and the moderating effect of network heterogeneity on job performance during social media usage. It may contribute to the understanding of the effects and mechanisms of social media usage.