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Chemosphere
Fujian Provincial Engineering Research Center for High-value Utilization Technology of Plant Resources, College of Environment and Resources, Fuzhou University, Fuzhou, Fujian, PR China. Electronic address:
Published: January 2020
Dam construction and fish culture can change the biogeochemical processes in river, yet their impact on the spectral properties of particulate organic matter (POM) remains to be studied. This was investigated in a reservoir-type river (Minjiang river, SE China) using absorption spectroscopy and fluorescence excitation-emission matrices-parallel factor analysis (EEMs-PARAFAC). Five fluorescent components were identified from POM with PARAFAC. Four components C1-C4 were affected by the seasonal variations of rainfall and runoff, indicating the influences of hydrological condition and terrestrial inputs. The Chlorophyll a concentration (Chl a) correlated significantly with the humic-like C3 (p < 0.05) and the protein-like C4 (p < 0.01), indicating phytoplankton was an important source of C3 and C4. The Chl a and fluorescence intensities of C3-C4 were higher in the fish culture zones than in other areas, and the absorption coefficient a and C1-C4 were lower downstream the dam. These results indicated that fish farming in the reservoir probably promoted the production of POM. The a and C1 per unit mass of suspended particulate matter (a/TSM and C1/TSM) correlated significantly with the median particle size (p < 0.01), which might be related to the contribution of micro-phytoplankton. The absorption spectra of POM showed a shoulder peak at ∼280 nm, and its intensity correlated significantly and positively with Chl a (p < 0.01). These results indicated that the peak was probably derived from phytoplankton production. Our results have implications for better understanding the influences of human activities on the dynamics of river POM.
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http://dx.doi.org/10.1016/j.chemosphere.2019.124734 | DOI Listing |
Fish Shellfish Immunol
March 2025
College of Life Science, Henan Normal University, No. 46 Jianshe Road, Xinxiang 453007, PR China. Electronic address:
Aeromonas hydrophila (A. hydrophila) is a pathogenic bacterium that often causes serious economic losses to aquaculture and fisheries. Its infection and pathogenesis of fish are currently not fully understood.
View Article and Find Full Text PDFBMC Microbiol
March 2025
Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, No. 36 Sanhao Street, Heping District, Shenyang, 110004, China.
Background: Recent studies have shown that in critically ill patients such as those with sepsis and shock, the lung and gut microbiomes undergo profound changes. Legionella pneumophila (Lp) can cause fatal infection, however, such changes have not been investigated in legionellosis. Here, we evaluated the microbiome of the lungs, blood, liver, and small intestine content in Lp-infected guinea pigs.
View Article and Find Full Text PDFChemosphere
March 2025
Wisconsin Sea Grant, University of Wisconsin-Madison Aquatic Sciences Center, Madison, WI, USA.
2,4-Dichlorphenoxyacetic acid (2,4-D) is the active ingredient in selective herbicides commonly used worldwide to control non-native aquatic plants. Limited research on the impacts of 2,4-D exposure on teleost innate immunity, such as barrier defense provided by epidermis, has been conducted. Fish keratocyte explant culture serves as a rapid, low-cost, cutaneous wound healing in vitro model of cell differentiation and migration.
View Article and Find Full Text PDFData Brief
April 2025
Department of Aquaculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.
SAU1 was isolated from Tilapia () that was cultured in a Recirculating Aquaculture System (RAS) in Bangladesh. The genome was sequenced using the Illumina MiSeq platform and assembled using the de novo genome assembly method. The draft genome was annotated and virulence factors, antimicrobial resistance related genes, CRISPER-Cas systems, metabolic pathways, and biosynthetic gene clusters were predicted.
View Article and Find Full Text PDFSci Data
March 2025
Minderoo OceanOmics Centre at UWA, Oceans Institute, University of Western Australia, Crawley, WA, Australia.
Spangled emperor, Lethrinus nebulosus (Forsskål 1775), is a tropical marine fish of economic and cultural importance throughout the Indo-West Pacific. It is one of the most targeted recreational fishes in the Gascoyne Coast Bioregion of Western Australia where it serves as an indicator species for recreational fishing. Here, we present a highly accurate, near-gapless, chromosome-level, haplotype-phased reference genome assembly of L.
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