文献类型：期刊文献

英文题名：Soil Particle Size Distribution and Assessment of Heavy Metal Contamination in the Ulan Buh Desert, Northern China

作者：Dai, Yujie[1] Zhao, Jianling[1] Dong, Zhi[2] Guo, Jianying[3] Li, Jinrong[3] Gao, Junliang[4]

第一作者：Dai, Yujie

机构：[1] School of Geography and Planning, Ningxia University, Yinchuan, 750021, China; [2] Taishan Forestry Ecosystem Research Station, Forestry College, Shandong Agricultural University, Tai’an, 271018, China; [3] Institute of Water Resources for Pastoral Area, The Ministry of Water Resources of China, Hohhot, 010020, China; [4] Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou, 015200, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240411944)

语种：英文

外文关键词：Error statistics - Grain size and shape - Health risks - Heavy metals - Light transmission - Public risks - Regression analysis - Risk analysis - Risk assessment - Size distribution - Sols - Ultrasonic velocity measurement

摘要：There is a paucity of detailed characteristics on the soil particle size distribution (PSD, using the American soil classification system) and heavy metal content (contamination), and how both are affected by natural shrub species (patches) in a desert ecosystem. This hinders the explicit recognition on properties and variabilities of natural sediments and the factors influencing them. To fill these scientific gaps, the common particle size statistic parameters and grain fractal dimensions, as well as Nemerow index (PI), were employed in this study to quantify characteristics of soil PSD and heavy metal contamination in the Ulan Buh Desert, Northern China. Samples of different soil layers were collected from a mobile dune and several dunes covered by different natural shrub species (patches). The shifting effects of natural shrub species (patches) on mean size, sorting, skewness, and kurtosis of soil PSD were complex, with those parameters varying markedly with increasing soil depths. The Ulan Buh Desert was characterized by a fine soil texture, with fine and medium sand constituting the main fractions in soil PSD. In general, compared with the PSD of mobile dune, natural shrub species strongly sorted and positively skewed the PSD but did not grade the kurtosis of PSD. While natural shrub species lowered the fine soil grain content and heterogeneity of soil PSD, they augmented the coarse grain content and distribution range as well as the dispersion of PSD. Notably, Ammopiptanthus mongolicus and Hedysarum scoparium exerted significant varying effects on the soil PSD (p ? 2024, The Authors. All rights reserved.