How exotic Sonneratia species affect the spatiotemporal dynamics of mangroves in Shenzhen Bay, China: A remote sensing perspective

•The growth of exotic mangrove was significantly faster than that of native species.•The morphological patterns can be used to indicate the hotspots of mangroves.•Sonneratia species was found in the forest gap and forest edge of native mangroves.•The spread of Sonneratia species is fast in bare tidal flat and tidal creek zones.•Invasive potentials of Sonneratia mangrove in Shenzhen Bay should not be ignored.