Global climate changes and human activities have led to the shift in vegetation dominance from grass to shrub in many coastal wetland ecosystems, which hasconsequently changed the patterns of global vegetation. This paper reviewed the patterns of shrub encroachment in coastal wetlands world widely. We analyzed the influences of global climate factors, such as the minimum temperature, air CO2 concentration, precipitation as well as sea level rising, on shrub encroachment in coastal zones. We also discussed the ecological effects of shrub encroachment on coastal environments, biodiversity and the blue carbon functions of coastal wetland ecosystems. There are, however, important information gaps and technology problems in current researches. Therefore, combination of varied high-resolution remote senses data is needed to accurately evaluate the spatial distribution of shrub encroachment in coastal wetlands on local, regionaland global scales, respectively. Researches in the future should also focus on the feedback mechanism of shrub encroachment in the coastal ecosystems. Finally, we give somecluesforresearches on the shrub encroachment ofcoastal wetlands in North and East China, which is quite different from the mangrove encroachment in South China.

滨海湿地生态系统在全球气候变化及人为活动的影响下,由禾本科植被为优势种向灌丛为优势种的类型 转变,进而影响到全球的植被格局。 本文总结了滨海湿地灌丛化的全球分布特征,从全球气候变化的角度分析了冬季 升温、大气 CO2 浓度升高、降雨格局改变和海平面上升对滨海湿地灌丛化的驱动机制,探讨了湿地灌丛化对海岸带生 态系统的群落结构、物种多样性和海岸带蓝碳等的影响。 最后,针对海岸带湿地灌丛化研究中存在的主要问题,提出 精准评估灌丛化空间分布和湿地灌丛化反馈机制的研究是未来应关注的重点,并对中国北方湿地灌丛化有关问题提 出建议。