Spatial Heterogeneity Analysis of Wetland Soil Particle Size in Shrub Encroachment Wetland in the Yellow River Delta
Liu Meifang
Wu Yuru
Wang De
Tian Xinpeng
Bi Xiaoli
Abstract：Global changes and human activities induce great shrub encroachments in coastal wetland eco-systems,altering their structures and functions.Taking the typical shrub-encroached wetland in the Yellow River Delta as a case and based on the GIS platform,we quantified the spatial pattern heterogeneity of soil particle composition(0～80 cm)by lacunarity analysis and analyzed the effects of different shrub encroach-ment types on soil particles by the cold(hot)spot analysis.The results were as follows.(1)The contents of different size soil particles in shrub-encroached wetland showed as silt＞sand＞clay.The content of clay and silt increased with the increase of soil layer depth while that of sand decreased.(2)The lacunarity of clay was higher than that of silt and sand in 0～20-cm layer,and they were similar in 20～30-cm layer.But below 30-cm layer,the lacunarity of clay decreased gradually utill lower than that of silt and sand.(3)The hot-spot area of sand in 0～50-cm layer occupied the largest in shrub patches,while that of clay in 0～40-cm layer and silt in 0～50-cm layer(except 10～20-cm layer)occupied the largest in tidal flat without shrubs.The hot-spot areas of soils in Tamarix chinensis cluster patches and bare land were moderated.These results could provide scientific references for accurate assessment of wetland shrub-encroached effect and wetland protection and res-toration.
Keywords：Wetland shrub encroachmentSoil particle sizeSpatial heterogeneityLacunarity analysisCold-hot spot analysisYellow River Delta
Publication Date：2025-06-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：10( 111-120 )