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China is the largest mariculture producer in the world, but detailed information on the spatiotemporal variations of biogenic elements and sources of sedimentary organic matter (SOM) via mariculture is limited. The primary objective of this study was to assess the influence of mariculture on the origin of SOM in relation with biogenic elements and geochemical paramaters due to the importance of SOM as a potential source of nutrients and energy in coastal marine environments. Surface sediments from the Maowei Sea were collected in August (summer) and December (winter), 2016 for grain size, total organic carbon (TOC), total nitrogen (TN), organic phosphorus (OP), biogenic silica (BSi), δC and δN analyses. Significant correlation (p < 0.01) was observed between TOC and TN in summer and winter respectively, indicating that they have common source in both seasons. The spatiotemporal distributions of TOC, TN, OP and BSi were influenced by the sources and distribution of SOM, grain sizes and hydrodynamic conditions in the Maowei Sea. The overall ranges of δC (-26.86‰ to -23.01‰) and δN (2.54‰ to 9.82‰) and C/N ratio (5.83 to 18.67) showed that SOM is derived from mixed sources. The δC and δN-based three-end-member mixing model results revealed that >40% of the deposited SOM originates from terrestrial source during two seasons. The SOM from shellfish mariculture was seasonal, mainly deposited in the intensive mariculture areas, and its proportions were only higher than contributions from marine plankton in summer. Generally, this study indicates that shellfish biodepositions can significantly influence the cycle of carbon and other biogenic elements in the intensive mariculture areas. Nevertheless, the overall dominance of terrestrial and marine SOM suggests that the sources of SOM and factors influencing carbon cycling in the Maowei Sea do not exclusively depend on the intensity of mariculture activities.
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http://dx.doi.org/10.1016/j.scitotenv.2020.139056 | DOI Listing |
Reducing animal-based food production and consumption due to environmental issues and undergoing upcoming changes in food dietary patterns is pushing European society to search for new protein sources. Consuming macroalgae (seaweed) is one of the possible solutions, and it is an exciting alternative for both sustainability and consumers' health. The aim of this work, implemented under the EU-FORA fellowship programme, was to evaluate the current and projected consumption of macroalgae in terms of possible beneficial and detrimental effects on consumers.
View Article and Find Full Text PDFMicrob Cell Fact
December 2024
Botany and Microbiology Department, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt.
This comprehensive review explores the emergence of titanium dioxide nanoparticles (TiO-NPs) as versatile nanomaterials, particularly exploring their biogenic synthesis methods through different biological entities such as plants, bacteria, fungi, viruses, and algae. These biological entities provide eco-friendly, cost-effective, biocompatible, and rapid methods for TiO-NP synthesis to overcome the disadvantages of traditional approaches. TiO-NPs have distinctive properties, including high surface area, stability, UV protection, and photocatalytic activity, which enable diverse applications.
View Article and Find Full Text PDFJ Hazard Mater
December 2024
College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801, China. Electronic address:
Acid mine drainage (AMD) containing arsenic produced during coal mining is a global environmental problem. However, the coupled driving process of the key element Fe and the associated element As in the AMD environment has received little attention. Therefore, in this study, we investigated the A.
View Article and Find Full Text PDFACS ES T Water
December 2024
Department of Integrative Biology, Oklahoma State University, Stillwater, Oklahoma 74078, United States.
Harmful algal blooms (HABs) are often linked to the increased loading of limiting nutrients such as nitrogen and phosphorus. Little is known about the relevance of other biogenic elements, the supplies of which are spatiotemporally heterogeneous, on HABs. We measured the dissolved, bioavailable, and particulate concentrations of 26 elements at four locations draining different catchments of a large reservoir during three seasons, in addition to the total abundance of phytoplankton and % of cyanobacteria.
View Article and Find Full Text PDFInt J Mol Sci
November 2024
Faculty of Pharmacy, Medical University of Sofia, 1000 Sofia, Bulgaria.
Numerous experimental studies suggest the potential for resveratrol (RVT) to be useful in the Alzheimer's disease treatment, but its low bioavailability limits its application. This study aimed to assess the potential of resveratrol-loaded micelles as a neuronal delivery platform to protect rats from scopolamine-induced memory impairment. Resveratrol was incorporated into Pluronic micelles, and the effects of micellar (mRVT) and pure resveratrol (RVT) were compared in the model of scopolamine-induced dementia in male Wistar rats.
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