Habitat destruction caused by human activities is threatening wetland plants. Based on Landsat 5 TM, Landsat 8 OLI, and Google Earth images, we analysed the spatiotemporal dynamics of plant populations in a degraded wetland in the Minjiang River Estuary from 2009 to 2019. Field survey records, tasselled cap transformation, and supervised classification were used for the image interpretation. The results indicate that the plant habitat area decreased by 42.1% over these 10 years. Consequently, the distribution area of each dominant species declined, and the proportion of total vegetated area in the habitat decreased from 53.1% to 32.6%. Moreover, the dominance relations of the species changed from Spartina alterniflora > Phragmites australis > Cyperus malaccensis > Scirpus triqueter to P. australis > S. alterniflora > C. malaccensis > S. triqueter. We predict that the vegetation landscape in the wetland will be composed exclusively of P. australis and S. alterniflora if habitat destruction continues. Finally, our research shows that the NPCS (net plant carbon sequestration) and PCS (plant carbon stock) in the wetland and the average values of methane flux, NPCS, PCS, and SOCS (sediment organic carbon stock) in the vegetated area have all decreased due to plant population declines.

人类活动造成的栖息地破坏威胁着湿地植物。基于Landsat 5 TM，Landsat 8 OLI和Google Earth图像，我们分析了2009年至2019年2009江河口退化湿地中植物种群的时空动态。使用了实地调查记录，流穗帽变迁和监督分类用于图像解释。结果表明，在这10年中，植物栖息地面积减少了42.1％。因此，每个优势种的分布面积减少，生境中植被总面积的比例从53.1％降低到32.6％。此外，该物种的优势关系从互花米草 > 芦苇 > 莎草（Cyperus malaccensis） > 藨草到芦苇 > 互花米草 >  C.芏 >  S. triqueter。我们预测，如果栖息地破坏继续下去，湿地的植被景观将仅由澳大利亚假单胞菌和互花米草组成。最后，我们的研究表明，湿地中的NPCS（植物净碳固存）和PCS（植物碳储量）以及植被区的甲烷通量，NPCS，PCS和SOCS（沉积物有机碳储量）的平均值都具有由于植物种群减少而减少。