EARTH AND ENVIRONMENT

Vol.40，No.4，Tot No.290 2013

CONTENTS

Research Results

Quantitative Change of Nitrifying Bacteria at Quanzhou Bay Estuary Wetland ……………………………………………………………………………WU Yan-you et al（473）

Use Sulfur Contents and S/N Ratios of Mosses to Explore Atmospheric Sulfur Deposition in Jiangxi Province ……………………………………ZHU Ren-guo et al（479）

Resistance and Stable Carbon Isotopic Composition of Two Biomass Plants under Osmotic Stress ……………………………………………ZHOU Yong-chu et al（485）

Mobilization and Redistribution of Elements in Soils Developed from Extremely Weathered Basalts on the Hainan Island …………………………LI Jian-wu et al（491）

Comparative Investigation of Soil Microbial Activity in the Karst and Non-Karst Areas …………………………………………………………………………GAO Xi et al（499）

The δ13CDIC Characteristics of Groundwater in Different Karst Environmental Conditions …………………………………………………………HUANG Qi-bo et al（505）

Study on Kart Processes under Castanea Mollissima Trees at Dry Season in Typical Karst Areas ………………………………………………LI Guang-chao et al（512）

Searching for Hydrochemical Imprints Indicating Human Impacts on the Nanming River: I. Spatial Variations ………………………………………YIN Xin-ya et al（517）

Searching for Hydrochemical Imprints Indicating Human Impacts on the Nanming River: II. Ten-Day-Scale Variations ……………………………YIN Xin-ya et al（524）

Geochemical Characteristics of Limestone Soil from Suzhou Area, Anhui Province……………………………………………………………………CHEN Song et al（529）

Combination Forms and Distribution Characteristics of Se in Daqing Longfeng Wetland Soils ………………………………………………………QI Yan-ping et al（536）

The Origin and Ecological Effects of Selenium Abnormity in Soil in Hebei Plain ………………………………………………………………………ZHANG Xiu-zhi et al（541）

Distribution of Barium and Barium Species in the Soil around a Barium Salt Factory ………………………………………………………………ZHANG Jun-fang et al（548）

Applied Study

Vertical Distributions of Phosphorus Forms and Bioavailable Phosphorus in the Sediments of Houwu from Hongfeng Lake and Calculation of Environmental Dredging Depth ……………………………………………………………………………………………………………………………………………………………ZHANG Run-yu et al（554）

Cross Wavelet Analysis of Relationship between Precipitation and Spring Discharge of a Typical Epikarst Water System…………………………QI Xiao-fan et al（561）

A Method of Combinated Weight Distribution for Groundwater Vulnerability Assessment Based on DRASTIC ……………………………………YU Xiang-qian et al（568）

A Preliminary Study on the Relationship Between Multi-scale Land Use & Landscape and River Water Quality Response in the Huntai Watershed ………………………………………………………………………………………………………………………………………………………………LI Yan-li et al（573）

The Pollution Status of Dust Heavy Metals around Refuse Transfer Stations in Guiyang City ………………………………………………………………HU Jun et al（584）

The Contents and Distribution of Selenium in Topsoils in Yubei District, Chongqing City and Its Agroeconomic Significance…………………YAN Ming-shu et al（589）

Sensitivity Analysis of Fault Structure and Regional Landslide Based on GIS …………………………………………………………………………CAO Hong-yang et al（595）

Special Subject and Review

Progress in the Study of Stable Hg Isotope Geochemistry ………………………………………………………………………………………………WANG Zhu-hong et al（599）

Expeviment Research

Simultaneous Analysis of Dissolved CO2 and 13C/12C ratios in Estuarine Water Using a Modification on-Line Pretreatment System Connected to EA-IRMS ………………………………………………………………………………………………………………………………………………………………CHEN Jin-fang et al（611）

Dynamic Simulation Experimental Research on Adsorption of Uranium on Clay Somewhere in Southwest China ………………………………………………LI Jie et al（618）