AI Article Synopsis
Article Abstract
At present, there are few studies on the spectral characteristics of dissolved organic matter (DOM) in the sediments of the Poyang Lake basin. Therefore, excitation-emission matrix spectroscopy (EEMs) technology and ultraviolet-visible spectra combined with the parallel factor analysis (PARAFAC) were applied to investigate the fluorescent components and sources of DOM in sediments from Poyang Lake. The results showed that the DOM in sediments originated from both terrestrial and autochthonous sources with a high humification. Compared with the sub-lakes, the DOM from the main lake was characterized with a higher concentration of colored DOM, larger particle size, and higher aromaticity and humification degree. In addition, four fluorescence components of DOM in sediments were identified by the PARAFAC model, including three humic-like components (C1, C2, and C4) and one protein-like component (C3). The fluorescence intensity of the humic substances in the sub-lakes was higher than those in the main lake. Furthermore, the percentage of fluorescence abundance of C1 was the highest both in the sub-lakes (42%) and main lake (46%). The spatial distribution of the fluorescence intensity of the four components gradually increased from west to east, and the peak values were observed in the Duchang and Nanji Wetland. This may be related to the death of a large number of plants due to the rise in the water level during the wet season and human activities. Principal component analysis showed that although there were no significant differences in the four fluorescent components between the sub-lakes and the main lake, the humification degree of DOM in the sub-lakes was slightly higher than that in the main lake.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.13227/j.hjkx.202106048 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
[Carbon Stock Changes and Forecasting in Xinjiang Based on PLUS and InVEST Model Approach].
Huan Jing Ke Xue
January 2025
School of Geographical Sciences and Tourism, Xinjiang Normal University, Urumqi 830054, China.
Land use change is the main cause of carbon stock changes in terrestrial ecosystems. Studying the impact mechanisms of carbon stock changes in different land use types in the arid zone and simulating future changes in land use and carbon stock under different scenarios will help to formulate a scientific land use policy for the arid zone to promote high-quality and sustainable development in the region. Based on the Xinjiang land use data from 2000 to 2020, the coupled PLUS-InVEST model analyzed the spatial and temporal characteristics of land use and carbon stock in Xinjiang from 2000 to 2020 and predicted the changes in land use and carbon stock in Xinjiang in 2030 under the scenarios of natural development （Z1）, economic development （Z2）, sustainable development （Z3）, arable land preservation development （Z4）, and ecological protection development （Z5）.
View Article and Find Full Text PDFThoughts for the future.
Nat Chem Biol
January 2025
CeMM, Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.
Clinical Outcomes of Early Phenotype-Desirable Antimicrobial Therapy for Enterobacterales Bacteremia.
JAMA Netw Open
December 2024
School of Pharmacy, University of Maryland, Baltimore.
Importance: Initiating effective therapy early is associated with improved survival among patients hospitalized with gram-negative bloodstream infections; furthermore, providing early phenotype-desirable antimicrobial therapy (PDAT; defined as receipt of a β-lactam antibiotic with the narrowest spectrum of activity to effectively treat the pathogen's phenotype) is crucial for antimicrobial stewardship. However, the timing of targeted therapy among patients hospitalized with gram-negative bloodstream infections is not well understood.
Objective: To compare the clinical outcomes between patients who were hospitalized with Enterobacterales bloodstream infections receiving early vs delayed PDAT.
Unraveling the potential structure of a Parnassius butterfly in Japan: Insights into the expansion history.
Mol Phylogenet Evol
December 2024
Laboratory of Insect Ecology, Faculty of Applied Biological Sciences, Gifu University, Yanagido 1-1, Gifu City, Gifu 501-1193, Japan.
The Japanese Archipelago consists of a series of isolated yet interconnected islands off the Eurasian continent. The linear topography of the archipelago presents a unique biogeographic context for the dispersal of organisms from the continent. In this study, mitochondrial DNA (mtDNA) and single-nucleotide polymorphism (SNP) variation were employed to elucidate the dispersal history of the Japanese clouded butterfly (Parnassius glacialis) across the Japanese Archipelago, including the northern island (Hokkaido), the main island (Honshu), and Shikoku Island.
View Article and Find Full Text PDFHepatotoxicity, developmental toxicity, and neurotoxicity risks associated with co-exposure of zebrafish to fluoroquinolone antibiotics and tire microplastics: An in silico study.
J Hazard Mater
December 2024
College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China. Electronic address:
This study aimed to investigate the differences in the mechanisms of microscopic hepatotoxicity, developmental toxicity, and neurotoxicity in aquatic organisms co-exposed to styrene-butadiene rubber tire microplastics (SBR TMPs) and fluoroquinolone antibiotics (FQs). We found that hepatotoxicity in zebrafish induced by SBR TMPs and FQs was significantly higher than developmental toxicity and neurotoxicity. Furthermore, the main effects of the FQs primarily manifested as synergistic toxicity, whereas the low- and high-order interactions of the FQs mainly exhibited synergistic and antagonistic effects, respectively.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!