Changes of soil particle size distribution in tidal flats in the Yellow River Delta

• Published in: PloS one 2015-03, Vol.10 (3), p.e0121368-e0121368
• Main Authors: Lyu, Xiaofei, Yu, Junbao, Zhou, Mo, Ma, Bin, Wang, Guangmei, Zhan, Chao, Han, Guangxuan, Guan, Bo, Wu, Huifeng, Li, Yunzhao, Wang, De
• Format: Article
• Language: English
• Subjects: Analysis; Aquatic ecosystems; Biodiversity; Biodiversity conservation; Carbon; China; Coastal erosion; Coastal protection; Coasts; Deltas; Ecosystem assessment; Ecosystem restoration; Environmental changes; Environmental Monitoring - methods; Environmental restoration; Erosion control; Fractal analysis; Fractals; Laboratories; Network analysis; Organic matter; Organic soils; Particle Size; Particle size distribution; Protection and preservation; Restoration; River ecology; Rivers; Salinity; Salt marshes; Sandy loam; Shorelines; Silt; Silt loam; Size distribution; Soil - chemistry; Soil erosion; Soil organic matter; Soil properties; Soil texture; Texture; Tidal flats; Tidal Waves; Wetlands
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0121368

The tidal flat is one of the important components of coastal wetland systems in the Yellow River Delta (YRD). It can stabilize shorelines and protect coastal biodiversity. The erosion risk in tidal flats in coastal wetlands was seldom been studied. Characterizing changes of soil particle size distribution (PSD) is an important way to quantity soil erosion in tidal flats. Based on the fractal scale theory and network analysis, we determined the fractal characterizations (singular fractal dimension and multifractal dimension) soil PSD in a successional series of tidal flats in a coastal wetland in the YRD in eastern China. The results showed that the major soil texture was from silt loam to sandy loam. The values of fractal dimensions, ranging from 2.35 to 2.55, decreased from the low tidal flat to the high tidal flat. We also found that the percent of particles with size ranging between 0.4 and 126 μm was related with fractal dimensions. Tide played a great effort on soil PSD than vegetation by increasing soil organic matter (SOM) content and salinity in the coastal wetland in the YRD. Tidal flats in coastal wetlands in the YRD, especially low tidal flats, are facing the risk of soil erosion. This study will be essential to provide a firm basis for the coast erosion control and assessment, as well as wetland ecosystem restoration.