Distribution and composition of organic carbon (OC) at nine soil profiles of three types of wetlands in Dongting Lake floodplain were analyzed. Results show that the OC content at top layer (0-10 cm) in Carex spp-dominated floodplain was much higher (>40 g/kg) than that in Phragmites-dominated floodplain (20 +/- 2.8) g/kg and paddy soil (28 +/- 8.6) g/kg. The OC content decreased with increasing depth from 0 to 30 cm, while it was relatively stable (around 15 g/kg) at depths deeper than 30 cm in Carex spp-dominated and Phragmites-dominated floodplain. However, there was a substantial variability in OC content in paddy soil profiles. In terms of the composition of OC, at top layer (0-10 cm), light fraction carbon in Carex spp-dominated floodplain accounted for more than 20% of the total organic carbon, whereas more than 90% of total organic carbon were heavy fraction that were much more difficult to be decomposed in Phragmites-dominated floodplain and paddy soils. The ratio of light fraction to total organic carbon at the soil profiles was greatly affected by the origin of organic matter. Statistical analyses indicate that there were significant correlations between heavy fraction and total organic carbon, between bulk density and total organic carbon, and between OC and nitrogen in heavy fraction (p<0.01).
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Advances in Heavy Metal Sensing: Utilizing Immobilized Chromogenic Reagents, Nanomaterials Perovskite and Nanonzymes.
Crit Rev Anal Chem
January 2025
Department of Chemistry, University of Delhi, New Delhi, India.
Heavy metal pollution is a major environmental and health problem due to the toxicity and persistence of metals such as lead, mercury, cadmium, and arsenic in water, soil, and air. Advances in sensor technology have significantly improved the detection and quantification of heavy metals, providing real-time monitoring and mitigation tools. This review explores recent developments in heavy metal detection, focusing on innovative uses of immobilized chromogenic reagents, nanomaterials, perovskites, and nanozymes.
View Article and Find Full Text PDFThe sugar transporter proteins in plants: An elaborate and widespread regulation network-A review.
Int J Biol Macromol
January 2025
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, China; Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Yantai 262306, China; Qingdao Center of Resource Chemistry & New Materials, Qingdao 266100, China. Electronic address:
In higher plants, sugars are the primary products of photosynthesis, where in CO is converted into organic carbon within the mesophyll cells of leaves. These sugars serve as a critical source of carbon skeletons for the biosynthesis of essential cellular compounds, energy production, and as osmotic and signaling molecules. Plant sugar transporter proteins play a key role in facilitating the long-distance translocation of sugars from source to sink organs, thereby controlling their distribution and accumulation across the plant.
View Article and Find Full Text PDFOcean acidification and global warming may favor blue carbon service in a Cymodocea nodosa community by modifying carbon metabolism and dissolved organic carbon fluxes.
Mar Pollut Bull
January 2025
Departamento de Biología, Facultad de Ciencias del Mar y Ambientales, Instituto Universitario de Investigación Marina (INMAR), Campus de Excelencia Internacional del Mar (CEI·MAR), Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain.
Ocean acidification (OA) and global warming (GW) drive a variety of responses in seagrasses that may modify their carbon metabolism, including the dissolved organic carbon (DOC) fluxes and the organic carbon stocks in upper sediments. In a 45-day full-factorial mesocosm experiment simulating forecasted CO and temperature increase in a Cymodocea nodosa community, we found that net community production (NCP) was higher under OA conditions, particularly when combined with warming (i.e.
View Article and Find Full Text PDFCharacterizing the precursors of byproducts formed by chlorine and chlorine dioxide disinfection using unknown screening analysis with Orbitrap mass spectrometry.
Sci Total Environ
January 2025
Department of Environmental Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand; Research Center for Environmental and Hazardous Substance Management, Khon Kaen University, Khon Kaen 40002, Thailand. Electronic address:
Chlorine (Cl) and chlorine dioxide (ClO) are commonly used to disinfect water but unfavorable interactions with dissolved organic matter (DOM) result in the formation of disinfection byproducts (DBPs). This study investigated the formation of organic DBPs arising from Cl and ClO disinfections under different contact times in two surface waters in Thailand and Suwannee River natural organic matter with/without bromide using unknown screening analysis with Orbitrap mass spectrometry. Many CHOCl-DBPs and CHOBr-DBPs intermediates were rapidly formed during the initial period of contact (5-30 min).
View Article and Find Full Text PDFThe abiologically and biologically driving effects on organic matter in marginal seas revealed by deep learning-assisted model analysis.
Sci Total Environ
January 2025
Key Laboratory of Coastal Biology and Biological Resource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; University of Chinese Academy of Sciences, Beijing 101408, China. Electronic address:
The biogeochemical processes of organic matter exhibit notable variability and unpredictability in marginal seas. In this study, the abiologically and biologically driving effects on particulate organic matter (POM) and dissolved organic matter (DOM) were investigated in the Yellow Sea and Bohai Sea of China, by introducing the cutting-edge network inference tool of deep learning. The concentration of particulate organic carbon (POC) was determined to characterize the status of POM, and the fractions and fluorescent properties of DOM were identified through 3D excitation-emission-matrix spectra (3D-EEM) combined parallel factor analysis (PARAFAC).
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!