Community expansion and succession are important processes in wetland ecosystems. Studying the expansion of restored plant communities contributes to understanding the dynamic evolution of wetland restoration, and is of great significance. A restored Carex appendiculata tussock wetland in Sun Island was selected for study and a field survey and 3S technology carried out to identify Carex tussock spatial distribution and expansion processes. We also analyzed relationships between the Carex community and environmental variables to clarify the main drivers of community expansion. The C. appendiculata tussock community expanded 29.91 m to southwest and 13.27 m to the east, respectively, with a total expansion area of 722 m². Carex tussocks in the expansion area had significantly higher leaf area, individual plant biomass, hummock diameter and volume, which were positively correlated with soil water content and water depth. Redundancy analysis (RDA) demonstrated that water depth was the major driving force for Carex tussock community expansion. Additionally, interspecific competition between Phragmites australis and Carex tussock may inhibit Carex community expansion. Moreover, as water depth affected the development and expansion of Carex tussocks, hydrological regulation can be used to accelerate the recovery and restoration of Carex tussock wetland. This study provides a specific technology for the restoration of Carex tussock wetland.

社区扩展和演替是湿地生态系统中的重要过程。研究恢复植物群落的扩展有助于理解湿地恢复的动态演变，具有重要意义。经过修复的苔appendiculata草丛太阳岛湿地被选定为研究和实地调查和3S技术进行识别苔草草丛空间分布与膨胀过程。我们还分析了Carex社区与环境变量之间的关系，以阐明社区扩展的主要驱动力。所述C. appendiculata草丛社区分别扩大29.91米向西南和13.27米到东部，与722微米的总膨胀区域²。扩展区的草苔草具有较大的叶面积，单株生物量，山岗直径和体积，与土壤含水量和水深呈正相关。冗余分析（RDA）表明，水深是Carex s草群落扩展的主要驱动力。另外，芦苇与草苔之间的竞争可能会抑制草苔群落的扩大。此外，如水深影响的发展和扩大苔草丛，水文调节可用于加速的复原和恢复苔草丛湿地。这项研究为恢复草苔草湿地提供了一种特殊的技术。