Article
Environmental Sciences
K. M. Bowes, J. R. White, K. Maiti, E. Meselhe
Summary: Louisiana, located in the southeast United States, is responsible for a significant portion of the nation's coastal wetland loss. The Mid-Barataria Sediment Diversion project aims to redirect sediment-laden river water into Barataria Basin, but this influx of colder water could negatively impact water quality.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agriculture, Multidisciplinary
Fan Wang, Tong Wang, Williamson Gustave, Jiaojiao Wang, Yuhang Zhou, Jiaqi Chen
Summary: Reclamation significantly affects soil carbon dynamics. This study investigated the impact of reclamation time and land-use types on soil carbon sequestration in the coastal wetland of Hangzhou Bay. The findings showed that soil pH and electrical conductivity were negatively correlated with reclamation time, while total organic carbon increased with reclamation time. The land-use type also had a significant effect on soil carbon content, with agricultural soil having higher levels of total organic carbon compared to other land-use types. Soil organic carbon generally decreased with soil profile depth.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2023)
Article
Environmental Sciences
Qian Cui, Hongjun Yang, Guangmei Wang, Jinzhao Ma, Lu Feng, Jingtao Liu
Summary: Coastal wetlands are important carbon sinks, and mowing management induced by human activities can significantly impact soil carbon stocks in these wetlands. This study investigated the effects of mowing management on soil quality, organic carbon content, and enzyme activities in Phragmites australis wetlands of the Yellow River Delta. The results showed that mowing treatments increased soil nutrient content and improved soil quality. Mowing also increased the amount of organic carbon and stimulated enzyme activities in the topsoil. Overall, continuous mowing management can enhance soil quality and carbon storage capacity of P. australis wetlands, thus contributing to carbon sequestration and sink capacity in coastal wetlands.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Lina Lyu, Haorui Liang, Yuhuan Huang, Haibing Ding, Gui-Peng Yang
Summary: This study investigates the components, concentrations, distribution characteristics, and sources of low-molecular-weight organic acids (LMWOAs) in the Changjiang Estuary and its adjacent sea area. The results show that terrigenous inputs, especially the Changjiang runoff, are the dominant sources of LMWOAs. The consistency between hypoxia areas, high concentration areas of LMWOAs, and low pH value areas suggests that annual hypoxia could cause long-term seawater acidification by producing LMWOAs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yiming Xu, Bin Li, Junhong Bai, Guangliang Zhang, Xin Wang, Scot E. Smith, Shudong Du
Summary: This research examined the effects of environmental variables with seasonal variations on digital soil mapping (DSM) in coastal wetlands. Machine learning methods were used to establish multiple prediction models of soil organic carbon (SOC) based on multi-temporal data. The results showed significant variations in the relationships between SOC and environmental variables in different months. The environmental variables in the wet season had stronger correlations and higher importance scores with SOC compared to the dry season. Furthermore, the prediction models in the wet season and April had stronger performance than those in the dry season. This study highlights the importance of considering seasonal variations in the establishment of a DSM model in coastal wetlands.
LAND DEGRADATION & DEVELOPMENT
(2022)
Article
Geochemistry & Geophysics
Bin Zhao, Peng Yao, Xuchen Wang, Thomas S. Bianchi, Michael R. Shields, Christian Schroder, Zhigang Yu
Summary: The aim of this study was to investigate the changes in the bound form of reactive iron (Fe-R) and organic carbon (OC) from estuarine suspended particulate matter (SPM) to coastal sediments. The results showed that the percentage of OC bound to Fe-R remained stable in SPM and mobile-mud sediments, indicating that binding with Fe-R is a potential long-term protection mechanism for terrestrial OC. Fe-R was mainly associated with pre-aged soil OC of terrestrial plant origin.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Biodiversity Conservation
Kaoping Zhang, Yu Shi, Haiying Lu, Minyan He, Wei Huang, Evan Siemann
Summary: Coastal reclamation poses a global threat to coastal wetland ecosystems, but its impacts on belowground biodiversity and nutrient cycling remain unclear. This study investigated the soil bacterial communities and multi-nutrient cycling index in natural vegetated coastal wetlands and rice-wheat rotation fields reclaimed from wetlands. The results showed that rice-wheat reclamation increased soil bacterial alpha diversity but decreased beta diversity and co-occurrence network complexity. The relative abundance of certain bacterial groups also changed with reclamation. The variations in soil bacterial community were mainly controlled by dispersal limitation and homogenizing dispersal, and were strongly related to soil multi-nutrient cycling, especially bacterial connection complexity.
ECOLOGICAL INDICATORS
(2022)
Article
Environmental Sciences
Kihwan Song, Yun-Eui Choi, Hyo-Joo Han, Jinhyung Chon
Summary: This study analyzes land use change and fragmentation of the Songdo wetlands through spatial-temporal simulation, proposing adaptation and transformation plans for different scenarios such as current state maintenance, development acceleration, and wetland restoration. The plans presented in this study can provide prediction results suitable for various contingencies and are meaningful in terms of proposing resilience plans for the Songdo area's development until 2030.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Ecology
Pengshuai Shao, Hongyan Han, Jingkuan Sun, Hongjun Yang, Hongtu Xie
Summary: This study found that high salinity in coastal wetlands restricts the accumulation of microbial residues and their contribution to the SOC pool, while low salinity wetlands have higher available soil resources, promoting microbial-derived C contribution to SOC.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Biodiversity Conservation
Haifu Li, Lifeng Li, Fangli Su, Tieliang Wang, Peng Gao
Summary: The study conducted at the tidal flat of the Liaohe Estuary Wetland established a comprehensive evaluation index of tidal flat ecological stability (ECO-CSI) and identified the driving factors and threshold values affecting the stability of the tidal flat. Human activities were found to be the major driving factors impacting the ecological stability of the tidal flat, while natural factors such as sediment discharge and precipitation played key roles in maintaining material supply. The study emphasized the importance of minimizing unreasonable human development activities to improve the stability of the tidal flat and ensure ecological security for the overall stability of the estuary wetland ecosystem.
ECOLOGICAL INDICATORS
(2021)
Article
Environmental Sciences
Xiao Ma, Anqi Liu, Qiang Zhao, Bin Wang, Di Tian, Qicheng Meng, Dingyong Zeng, Jia Li, Daji Huang, Feng Zhou
Summary: This study investigates the temporal variation of summer hypoxia along a hydrographic section from the Changjiang River mouth to Cheju Island. It finds that the dissolved oxygen values show significant interannual variation and are strongly influenced by the El Nino-Southern Oscillation cycle. In summer, the probability of dissolved oxygen depletion off the Changjiang Estuary increases during the decaying phase of El Nino.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Zhimei Zhang, Yanguo Fan, Zhijun Jiao
Summary: Long-term, quantitative, and dynamic monitoring of regional ecological integrity using remote sensing is important for sustainable regional development. Existing methods do not accurately evaluate surface ecological integrity due to the lack of consideration of vegetation saturation and wetland salinization. The integration of environmental salinity and a new vegetation element in the wetland ecological index (WEI) improves the accuracy of wetland integrity evaluation to 89%.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Laibin Huang, Guangliang Zhang, Junhong Bai, Zhijian Xia, Wei Wang, Jia Jia, Xin Wang, Xinhui Liu, Baoshan Cui
Summary: The study evaluated the effectiveness of desalinization via freshwater restoration in coastal wetlands by analyzing microbial communities and activities. The results showed that freshwater input significantly increased soil organic carbon content and improved microbial diversity and functions in restored wetlands. The recovered microbial diversity and abundance of specific bacteria in restored wetlands were similar to those in original freshwater wetlands.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Lingyan Zhou, Wei Yan, Xiaoying Sun, Junjiong Shao, Peipei Zhang, Guiyao Zhou, Yanghui He, Huiying Liu, Yuling Fu, Xuhui Zhou
Summary: The study reveals that coastal wetlands have higher aboveground biomass but lower R/S compared to inland wetlands. Climate, soil, and hydrological factors have different impacts on R/S in wetlands, with a more significant effect on inland wetlands.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Qian Cheng, Tieliang Wang, Fujiang Chen
Summary: Coastal wetlands, located between land and sea, have important ecological roles, but development and urbanization have led to degradation and pollution. This study used RS and GIS technology to analyze changes in ecological environmental quality of Linghekou wetland. The results show a decrease in natural wetland area, landscape fragmentation, and decline in ecological quality. Habitat improvement was observed since 2015, but anthropogenic disturbance still poses a strong pressure. The study predicts further deterioration in ecological quality and habitat degradation in the future. It provides valuable insights for wetland management and ecological construction.