Article
Environmental Sciences
Yixuan Zhang, Dandong Cheng, Jinxi Song, Rui Pang, Hangzhen Zhang
Summary: River ecosystems receive dissolved organic matter (DOM) from various sources, but how human and natural factors affect DOM quantity and quality changes remains unclear. This study identified three fluorescence components in river DOM and investigated the driving mechanisms of these changes using PLS-SEM. Human activities, particularly agriculture, directly and indirectly influence protein-like DOM accumulation by enhancing anthropogenic discharge and affecting water quality. Water quality, in turn, affects DOM composition by stimulating in-situ production and inhibiting microbial humification processes.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Jian Zou, Hang Xie, Chengzhi Zheng, Songhui Lu
Summary: The study on benthic Prorocentrum concavum in Xincun Bay revealed seasonal variations in abundance and spatial heterogeneity, with seagrass beds potentially serving as a reservoir for harmful algal blooms and the dense cage-culture area providing organic nutrients for growth and reproduction.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Xinting Yan, Jiahao Liao, Xingxing Cao, Zhiwei Han
Summary: This study investigated the distribution and sources of dissolved organic nitrogen (DON) in the surface sediment of Caohai Lake in southwest China. The results showed that DON in the lake sediment was influenced by terrestrial sources and biological activities, revealing the circulation mechanism of endogenous nitrogen and providing theoretical support for the prevention and control of nitrogen pollution in Caohai Lake.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Zhimin Zhang, Wanyu Zhao, Wei Hu, Junjun Deng, Lujie Ren, Libin Wu, Shuang Chen, Jingjing Meng, Chandra Mouli Pavuluri, Yele Sun, Zifa Wang, Kimitaka Kawamura, Pingqing Fu
Summary: Low molecular weight organic compounds are present in the atmosphere and their concentrations in fresh snow were analyzed in this study. The study found high levels of total dicarboxylic acids in the snow samples, with oxalic acid being the main component. Elevated levels of phthalic acid in snow from certain regions suggest emissions from vehicular exhausts and fossil fuel combustion sources.
ENVIRONMENTAL POLLUTION
(2021)
Article
Optics
Yuchao Fu, Meizhen Huang, Wanxiang Li
Summary: The research established a fluorescence emission model, analyzed the spatial attenuation effect of excitation light, and obtained a high-accuracy model between received fluorescence intensity and concentration. Using this model, analysis of fluorescent substances with ultra-wide concentration range can be realized.
Article
Environmental Sciences
Lu Peng, Lili Liu, Peng Li, Kunde Lin
Summary: Polyhalogenated carbazoles (PHCZs) have been detected in high concentrations in sediment samples from the Yangtze River estuary and the adjacent East China Sea. The dominant PHCZ, 36-CCZ, is primarily of anthropogenic origin, while 36-BCZ has a natural origin. These findings provide valuable information on the sources of PHCZs and carbazole in this area.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Marine
Chenchen Wang, Yongsheng Luan, Dawei Pan, Yuxi Lu, Haitao Han, Shenghui Zhang
Summary: The concentrations of total dissolved iron (TdFe) and dissolved reactive iron (DrFe) in the Northern coastal China seawater were measured using cathodic stripping voltammetry (CSV). The results showed that the concentration of DrFe remained relatively stable over the study period, while the concentration of TdFe varied more widely. The changes in temperature, chlorophyll a concentrations, and nutrients influenced the supply and consumption of DrFe.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Ling Ding, Sen Shan, Chunle Luo, Xuchen Wang
Summary: This study investigated the concentrations and distribution of dissolved organic carbon (DOC) in the South China Sea and the western North Pacific. Laboratory experiments were conducted to determine the microbiological respiration of DOC. The findings revealed that DOC concentrations in the South China Sea varied greatly and were influenced by multiple factors. Physical mixing played a significant role in the distribution of mesopelagic DOC in the northern South China Sea basin.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Engineering, Environmental
Weilu Kang, Xiangang Hu, Ruihong Feng, Changhong Wei, Fubo Yu
Summary: The study provides insights into the effects of land use on greenhouse gas emissions in rivers. The microbial composition and dissolved organic matter properties were found to be influenced by land use intensity and DOM chemical composition. Anthropogenic stressors played a significant role in chromophoric DOM, and DOM biodegradability was positively correlated with CDOM. The variations in CO2 and CH4 emissions were primarily governed by the biodegradation or photomineralization of dissolved organic carbon derived from autotrophic DOM, which was indirectly affected by land use through changes in DOM properties and water chemistry.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Ecology
Xin Wang, Ting Liu, Liang Wang, Zongguang Liu, Erxiong Zhu, Simin Wang, Yue Cai, Shanshan Zhu, Xiaojuan Feng
Summary: This study provides a detailed investigation on riverine carbon transport in alpine headwater streams, highlighting the significant impact of seasonal factors and hydrological events on carbon transport. The results emphasize the unique patterns of carbon transport in alpine headwater catchments and their strong links with local hydrological events.
Article
Environmental Sciences
Zheng Li, Zhenghui Fu, Yang Zhang, Yunyan Guo, Feifei Che, Huaicheng Guo, Shuhang Wang
Summary: Dissolved organic matter (DOM) has a significant impact on lake pollution indicators, and Qinghai Lake, a typical plateau lake wetland, is facing ecological pressure with anthropogenic sources being the main factor influencing DOM in the lake.
Article
Geochemistry & Geophysics
Ziming Fang, Weifeng Yang, Aron Stubbins, Min Chen, Junjie Li, Renming Jia, Qi Li, Jing Zhu, Bo Wang
Summary: In the Arctic region, the fate and removal process of dissolved black carbon released from river water into the ocean remains unclear. Research findings show that river discharge dominates the spatial distribution of dissolved black carbon in ice-free regions, while sea-ice meltwater dilutes dissolved organic carbon. The removal of riverine dissolved black carbon mainly occurs in shelf regions, playing a crucial role in modulating the delivery of black carbon to the open Arctic Ocean.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Environmental Sciences
Zuhao Zhu, Huihua Wei, Yao Guan, Li Zhang, Renming Jia, Pengfei Sun, Yang Yang, Zhen Zhang, Qiufeng Zhang
Summary: This study reveals notable spatial and seasonal variations in the concentration, source, and mixing of dissolved organic matter (DOM) at the land-ocean interface. DOM in the northern Beibu Gulf is influenced by river discharge, anthropogenic input, and in situ biological activity. The mixing behavior of DOM varies between nearshore and offshore waters.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Engineering, Civil
Ewen Silvester, Terry Karis, Anne Yusuf, John Pengelly, Samantha Grover, Gavin N. Rees
Summary: The study found that storm events mobilized dissolved organic carbon and nitrogen, with proteins playing a key role and exhibiting different dynamics at different stages of the storm. This suggests that there is spatial and temporal separation of molecular groups within the pools of dissolved organic carbon and nitrogen, leading to changing composition of DOC through a storm cycle.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Dongxing Chen, Lin Zeng, Katherine Boot, Qianqian Liu
Summary: This study investigates the spatial and temporal variabilities of particulate organic carbon (POC) in different subregions of the East China Sea (ECS) and identifies the dominant influencing factors. The analysis reveals that POC in the ECS is influenced by river discharge, sediment discharge, water exchange, and biological activity. The study also develops a method to estimate the organic matter reserve in the ECS based on satellite data and in situ samplings.
Article
Environmental Sciences
Minshu Yuan, Qiuan Zhu, Jiang Zhang, Jinxun Liu, Huai Chen, Changhui Peng, Peng Li, Mingxu Li, Meng Wang, Pengxiang Zhao
Summary: This study reveals that future climate extremes will become more frequent and intense, leading to significant impacts on GPP. The response of GPP to extreme climate events is primarily driven by temperature and precipitation extremes, with varying sensitivity in different regions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Forestry
Yue Wang, Jinming Hu, Yanzheng Yang, Ruonan Li, Changhui Peng, Hua Zheng
Summary: The study found that the ecosystem carbon use efficiency (CUE) in the Qinghai-Tibet Plateau may decrease in the future, with a more significant decrease trend as radiation forcing increases. Temperature is the primary climate factor affecting CUE, mainly through its impact on GPP and NPP to produce indirect effects, with a higher comprehensive effect on CUE than precipitation and CO2 on an annual scale.
Article
Biology
Xinyi Guo, Changhui Peng, Tong Li, Jingjing Huang, Hanxiong Song, Qiuan Zhu, Meng Wang
Summary: The study demonstrated that pine seedlings exhibit strong drought resistance by allocating non-structural carbohydrates to roots and depleting starch storage during drought stress. After re-watering, starch storage was rebuilt. This indicates the important role of non-structural carbohydrates, especially starch, in the survival of plants under drought conditions and highlights the strategies for carbohydrate allocation post-drought stress.
Article
Environmental Sciences
Meng Nan, Yang Yan-zheng, Zheng Hua, Li Ruo-nan
Summary: The study analyzed the impact of climate change on ecosystem patterns and services on the Qinghai-Tibet Plateau, predicting future climate trends and finding that grassland will play a crucial role in providing sandstorm prevention services due to changes in ecosystem patterns caused by climate change.
JOURNAL OF MOUNTAIN SCIENCE
(2021)
Article
Soil Science
Tong Li, Changhui Peng, Zhaojun Bu, Qiuan Zhu, Hanxiong Song, Xinyi Guo, Meng Wang
Summary: Nitrogen enrichment increased C- and P-acquiring EEAs in both categories of wetlands. However, for P enrichment, significant responses of soil EEAs were observed in moss/sedge-dominated wetlands only: beta-1,4-glucosidase activity increased 76% but phosphatase activity decreased 78%, on average. Woody plants may override microbial response to nutrient enrichment and mitigate the negative effect of nutrient enrichment on soil organic C stock.
SOIL BIOLOGY & BIOCHEMISTRY
(2021)
Article
Environmental Sciences
Yanzheng Yang, Ruikun Gou, Wei Li, Jalal Kassout, Jun Wu, Liming Wang, Changhui Peng, Guanghui Lin
Summary: The study found that the variations in leaf functional traits were mainly caused by differences within the same site; N-mass and LDMC were positively correlated with soil water content (SW) and negatively correlated with vapor pressure deficit (VPD), while chi showed negative relationships with elevation. Climate, soil, and family controls together explained 78% of the variation in the studied plant functional traits, with family distribution being the most important determining factor for trait covariation along the elevation gradient.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Environmental Sciences
Chong-Bang Zhang, Jiang Wang, Wen-Li Liu, Hang Jiang, Meng Wang, Ying Ge, Jie Chang
Summary: This study investigated the relationships between denitrifying bacterial and fungal communities and nitrogen removal in vertical flow wetland microcosms using different macrophyte species and species richness levels as fixed factors. The results showed that macrophyte richness and bacterial denitrifiers play critical roles in nitrogen removal in wetland systems.
Article
Environmental Sciences
Binbin Huang, Yanzheng Yang, Ruonan Li, Hua Zheng, Xiaoke Wang, Xuming Wang, Yan Zhang
Summary: This study analysed the impact of land use/land cover change on water retention in Beijing between 2000 and 2015. The results showed an overall increase in water retention, with forests contributing the most to the increase. However, urbanization, cropland expansion, and deforestation led to a decline in water retention.
Article
Biology
Yanzheng Yang, Le Kang, Jun Zhao, Ning Qi, Ruonan Li, Zhongming Wen, Jalal Kassout, Changhui Peng, Guanghui Lin, Hua Zheng
Summary: This study used a plant functional trait approach to discuss plant strategies along an aridity gradient, finding that eight functional traits can be divided into four adaptation strategies and concluding that climate, soil, and family are the main driving forces of trait covariations.
Article
Agronomy
Leming Ge, Chen Chen, Tong Li, Zhao-Jun Bu, Meng Wang
Summary: This study investigates the effects of nitrogen and phosphorus deposition on fine root adaptive strategies in peatlands. It found that phosphorus addition increases shrub fine root production during the growing season, while nitrogen addition decreases shrub fine root production during the non-growing season. Overall, nitrogen and phosphorus deposition lead to a shift in fine root adaptive strategies.
Article
Soil Science
Liangfeng Liu, Jianqing Tian, Hongjun Wang, Dan Xue, Xinya Huang, Ning Wu, Xingliang Xu, Meng Wang, Changhui Peng, Yanfen Wang, Huai Chen
Summary: Peatlands are important for global carbon sequestration, but they have been severely drained. This study investigated the CO2 release at the oxic-anoxic transitional (OAO) interface in drained peatlands in response to climate warming and exogenous carbon addition. The results showed that the carbon at the OAO interface was complex and the microbial activity and diversity were lowest at this interface. The CO2 emission at the OAO interface was least affected by warming, but highly sensitive to exogenous carbons. Maintaining a stable OAO interface can help reduce carbon loss in drained peatlands, but the priming effect caused by exogenous carbons needs to be addressed.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Environmental Sciences
Lijuan Li, Yanzheng Yang, Tengyu Cui, Ruonan Li, Hua Zheng
Summary: The hydrologic-related ecosystem services in upstream ecological conservation zones play an important role in regulating water scarcity and conflicts downstream. However, the combined effects of socioeconomic, land use, and climate factors on these services have not been well analyzed, leading to a lack of understanding about their spatial heterogeneity and drivers. In this study, the InVEST model and multivariate analysis were used to assess the interactions of these factors on hydrologic-related ecosystem services in the Beijing Ecological Conservation Development Zone. The results show significant temporal and spatial heterogeneity in water yield and purification services, with land use having the largest impact followed by climate and socioeconomic factors.
Article
Environmental Sciences
Dongsheng Li, Jinfeng Ma, Kaifeng Rao, Xiaoyan Wang, Ruonan Li, Yanzheng Yang, Hua Zheng
Summary: This study proposed a hybrid model (DSP) that combines the advantages of discrete wavelet transform (DWT), support vector regression (SVR), and Prophet to forecast rainfall data. The DSP model provides excellent prediction, with RMSE, MAE, and R-2 values of 6.17, 3.3, and 0.75, respectively. It yields higher prediction accuracy than the three baseline models considered and demonstrates good results when applied to rainfall data from various climate types.
Article
Meteorology & Atmospheric Sciences
Liming Wang, Songjun Han, Fuqiang Tian, Mahmut Tudaji, Yanzheng Yang
Summary: This study compared the efficiencies of four prognostic generalized complementary functions on evaporation estimation at 195 eddy covariance sites. The results showed that all four functions provided acceptable estimations of evaporation at most sites. Each function has its own advantages, but there is still room for improvement.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Environmental Studies
Jinfeng Ma, Ruonan Li, Yanzheng Yang, Yue Hai, Tian Han, Hua Zheng
Summary: This study analysed the temporal and spatial changes in wind erosion prevention services in northern China from 2000 to 2015 and proposed suggestions for land-use management and project zoning policies.
