ABSTRACT

Introduction: Accurate identification of the dominant factors affecting coastal wetlands can provide a reference for vegetation rehabilitation. In this study, quantitative analysis was performed on the Yancheng coastal wetland using ANOVA and geostatistical methods. Outcomes/other: The results indicated that in the directions perpendicular and parallel to the coastline, the soil moisture and salinity in the study area exhibited relatively significant (p<0.05) spatial variability. Vegetation in the southern experimental zone was in a low-moisture, low-salinity ecological niche, whereas vegetation in the northern experimental zone was in a high-moisture, high-salinity ecological niche. Soil salinity exhibited higher spatial variability than soil moisture, and it was most correlated with unvegetated mudflats, followed by areas with Spartina alterniflora, Suaeda glauca, and Phragmites australis. Discussion: The fitting of the semivariogram showed that the nugget and sill of the ratio were relatively low (<25%) for soil moisture and salinity in the northern experimental zone and northern buffer zone, whereas these values were relatively high (>75%) for soil moisture and salinity in the southern experimental zone and southern buffer zone. Conclusion: Compared with the northern study area, the contribution of human disturbance to the spatial heterogeneity of soil moisture and salinity in the southern study area is higher.

摘要

简介：准确识别影响沿海湿地的主要因素可为植被恢复提供参考。在这项研究中，使用ANOVA和地统计方法对盐城沿海湿地进行了定量分析。结果/其他：结果表明，在与海岸线垂直和平行的方向上，研究区域的土壤水分和盐度表现出相对显着的（p <0.05）空间变异性。南部实验区的植被处于低水分，低盐度的生态位，而北部实验区的植被处于高水分，高盐度的生态位。土壤盐分比土壤水分具有更高的空间变异性，并且与无植被的滩涂最相关，其次是互花米草，浅草小叶菊和芦苇。讨论区：半变异函数的拟合表明，在北部实验区和北部缓冲区，土壤水分和盐分比值的金块和基石相对较低（<25％），而在北部缓冲区，这些值相对较高（> 75％）南部实验区和南部缓冲区的土壤水分和盐分。结论：与北部研究区相比，人为干扰对南部研究区土壤水分和盐分空间异质性的贡献更大。