MARINE POLLUTION BULLETIN
·
2014
·
IF 2.793
Fenglan Li,Xiaokang Zeng,Junda Yang,Kai Zhou,Qijie Zan,Anping Lei,Nora F.Y. Tam
The concentrations of 16 individual and total polycyclic aromatic hydrocarbons (∑PAHs) in sediments, roots and leaves of three mangrove swamps in Shenzhen, China, namely Futian, Baguang and Waterlands, were determined. The mean concentration of ∑PAHs in Futian (4480 ng g −1 ) was significantly higher than that in Baguang (1262 ng g −1 ) and Waterlands (2711 ng g −1 ). Among the 16 PAHs, the concentration of naphthalene was the highest. Based on the ratios of phenanthrene/anthracene and fluoranthene/pyrene, PAHs in Futian and Waterlands came from petrogenic and pyrolytic sources, while Baguang was mainly from pyrolytic. More PAHs were accumulated in leaves, as reflected by its higher mean concentration of ∑PAHs (3697 ng g −1 ) and bioconcentration factor of PAHs (BCF) (>1.5) than that in roots. The BCF values in plants collected from Futian were significantly higher than that from Waterlands. These results indicated that more attention should be paid to the PAH contamination in Futian.
研究领域:
生态学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Antibiotics-Basel
·
2024
·Vol. 13
·期 9
·820
·
IF 4.3
Pengfei Sun,Yongyu Tan,Zuhao Zhu,Tinglong Yang,Shalini Thevarajan,Li Zhang
In recent years, the widespread application of antibiotics has raised global concerns, posing a severe threat to ecological health. In this study, the occurrence, source, and ecological risks of 39 antibiotics belonging to 5 classes in mangrove sediments from Lianzhou Bay, China, were assessed. The total concentrations of the antibiotics (∑39 antibiotics) ranged from 65.45 to 202.24 ng/g dry weight (dw), with an average of 142.73 ± 36.76 ng/g dw. The concentrations of these five classes of antibiotics were as follows: Sulfonamides (SAs) > Tetracyclines (TCs) > Fluoroquinolones (QUs) > Penicillin (PCs) > Macrolides (MLs). The spatial distribution of antibiotics varied as high tidal zone > middle tidal zone > low tidal zone. The total organic carbon (TOC), pH, nitrate (NO 3 − -N), and nitrite (NO 2 − -N) of the sediment significantly influenced the distribution of antibiotics ( p < 0.05). A source analysis identified untreated sewage from aquaculture as the primary source of antibiotics in the local mangrove. A risk assessment revealed that ciprofloxacin, norfloxacin, ofloxacin of QUs, and tetracycline of TCs exhibited medium risks to algae in certain sampling sites, while other antibiotics exhibited low or no risks to all organisms. Nevertheless, the total risk of all the detected antibiotics to algae was medium in 95% of the sites. The overall ecological risk level of antibiotics in the middle tidal zone was slightly lower than in the high tidal zone and the lowest in the low tidal zone. In summary, the experimental results provided insights into the fate and transport behaviors of antibiotics in mangrove sediments from Lianzhou Bay.
研究领域:
环境科学
·
生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Tianli Tong,Ruili Li,Jianfei Chen,Yanchu Ke,Shuguang Xie
Bisphenol A (BPA) is one of the widely detected endocrine disrupting chemicals in coastal sediment . Biodegradation is a vital pathway of BPA elimination in sediment. However, the impact of vegetation on BPA degradation in coastal sediment is still unclear. In this study, the differences of BPA biodegradation and the functional microbial community and metabolic pathway were explored between mangrove forest and mudflat sediments. A nearly complete BPA attenuation was detected in 4 days in mudflat sediment but 8 days in forest sediment. Bacterial abundance varied greatly in different sediment types. Bacterial community structure changed with BPA biodegradation, dependent on sediment type. During the degradation, the proportions of Alphaproteobacteria and Gammaproteobacteria were higher in BPA amended microcosms than in un-amended microcosms. With BPA biodegradation, a substantial increase in Novosphingobium and Croceicoccus occurred in forest sediment and mudflat sediment, respectively. Additionally, two divergent BPA biodegradation pathways were proposed based on functional annotation and KEGG pathway database. The abundance of functional genes also varied with BPA biodegradation, dependent on sediment type. Gene pcaGH decreased, while genes ligK and pcaD increased in both sediment types. Gene pcaB showed a remarkable increase in forest sediment but a decrease in mudflat sediment. Therefore, BPA degradation and the associated microbial community and metabolic pathway differed between mudflat and mangrove forest sediments.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2016
·Vol. 21
·期 8
·970
·
IF 2.465
Ying Han,Erli Tian,Dongbo Xu,Min Ma,Zixin Deng,Kui Hong
During our search for interesting bioactive secondary metabolites from mangrove actinomycetes, the strainStreptomycessp. 219807 which produced a high elaiophylin yield of 4486 mg/L was obtained. A new elaiophylin derivative, halichoblelide D (1), along with seven known analogues2–8was isolated and identified from the culture broth. Their chemical structures were determined by detailed analysis of 1D and 2D NMR and HRMS data. The absolute configuration of halichoblelide D (1) was confirmed by comparing the CD spectrum with those of the reported analogues. Compounds1–7exhibited potent cytotoxic activities against HeLa and MCF-7 cells with IC50values ranging from 0.19 to 2.12 μM.Keywords:mangrove actinomycetes;Streptomycessp. 219807;elaiophylin;cytotoxic
研究领域:
微生物学
·
药物化学
·
肿瘤学
✓ 已验证
DOI
PubMed
高影响因子
Marine Drugs
·
2023
·Vol. 21
·期 5
·270
·
IF 5.4
Zhuling Shao,Yingying Tian,Shan Liu,Xiao Chu,Wenjun Mao
Marine microorganisms often produce exopolysaccharides with novel structures and diverse biological activities due to their specific marine environment. The novel active exopolysaccharides from marine microorganisms have become an important research area in new drug discovery, and show enormous development prospects. In the present study, a homogeneous exopolysaccharide from the fermented broth of the mangrove endophytic fungusPenicillium janthinellumN29, designated as PJ1-1, was obtained. The results of chemical and spectroscopic analyses showed that PJ1-1 was a novel galactomannan with a molecular weight of about 10.24 kDa. The backbone of PJ1-1 was composed of →2)-α-d-Manp-(1→, →4)-α-d-Manp-(1→, →3)-β-d-Galf-(1→ and →2)-β-d-Galf-(1→ units with partial glycosylation at C-3 of →2)-β-d-Galf-(1→ unit. PJ1-1 had a strong hypoglycemic activity in vitro, evaluated using the assay of α-glucosidase inhibition. The anti-diabetic effect of PJ1-1 in vivo was further investigated using mice with type 2 diabetes mellitus induced by a high-fat diet and streptozotocin. The results indicated that PJ1-1 markedly reduced blood glucose level and improved glucose tolerance. Notably, PJ1-1 increased insulin sensitivity and ameliorated insulin resistance. Moreover, PJ1-1 significantly decreased the levels of serum total cholesterol, triglyceride and low-density lipoprotein cholesterol, enhanced the level of serum high-density lipoprotein cholesterol and alleviated dyslipidemia. These results revealed that PJ1-1 could be a potential source of anti-diabetic agent.Keywords:mangrove endophytic fungus;exopolysaccharide;structure;anti-diabetic activity
研究领域:
海洋生物学
·
药理学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF GEOCHEMICAL EXPLORATION
·
2019
·
IF 3.472
Yunmei Cai,Jiandong Wu,Yanlin Zhang,Zheng Lin,Yisheng Peng
In order to clarify the distribution, sources, and ecological risk of 16 polycyclic aromatic hydrocarbons (PAHs) in sediments of mangrove wetland located in Shantou, twenty eight surface sediments were collected. The concentration of PAHs ranged from 79.74 to 853.17 ng g −1 dry weight. The concentration of PAHs of sediment in the high tides was higher than that in the low tides and higher in mangrove-planting area than that in non-mangrove growth zone. The spatial distribution of PAHs in the sediment of mangrove wetland was mainly influenced by input sources and tidal currents . The result of the principal component analysis-multiple linear regression model indicated that the major source of PAHs in the studied area was coal burning. However, the adverse effect of PAHs was weak to biota. Undeniably, a lot more systematic explorations are demanded in future to investigate the PAHs contamination in the mangrove wetlands in small–medium cities with the development of coastal zone economy.
研究领域:
环境科学
·
海洋生态学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 21
·31413-31425
·
IF 5.19
Guo Shuai,Wei Chaoxian,Zhu Yaxian,Zhang Yong
The effects of sodium dodecyl benzene sulfonate (SDBS), polyoxyethylene (20) sorbitan monolaurate (Tween 20), and their mixtures on the depuration of anthracene (Ant) and fluoranthene (Fla) individually adsorbed on the Kandelia obovata ( Ko ) leaf surfaces were in situ investigated. The Ko original leaf-wax microstructures have been destroyed by SDBS, Tween 20, and their mixtures at or above their critical micelle concentration (CMC). The volatilization rate constants ( k V ) of the adsorbed PAHs decreased with surfactants at or above their CMC resulting from the plasticizing effect and a decrease in the polarity of the Ko leaf-waxes induced by surfactants. Moreover, the photolysis rate constants ( k P ) of the adsorbed PAHs decreased with SDBS while increased with Tween 20 and their mixtures at or above their CMC, which can be attributed to effects of surfactants on the light adsorption behavior of Ko leaf-waxes. Overall, the effects of surfactants on the depuration of the adsorbed PAHs were dependent not only on the physical–chemical properties of surfactants but also on the micro-environment of the substrates adsorbed the PAHs. These results are of great significance for further understanding the accumulation of PAHs and could expand our knowledge about the migration mechanism of PAHs from the atmosphere by mangrove leaf surface micro-zones.
研究领域:
环境科学
·
生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2021
·
IF 8.071
Shuai Guo,Chaoxian Wei,Yaxian Zhu,Yong Zhang
Plant leaf cuticles play a critical role in the accumulation and transport of atmospheric polycyclic aromatic hydrocarbons (PAHs). The relationship between the distribution and retained amount of PAHs on the leaf cuticles and the leaves micro-zone structures is still unclear. In this study, a confocal microscopic fluorescence spectral analysis (CMFSA) system with a spatial resolution of 200 nm was established as a direct and noninvasive means to determine the microscopic distribution and quantify the retained amount of benzo[a]pyrene (B[a]P) at Aegiceras corniculatum ( Ac ), Kandelia obovata ( Ko ) and Avicennia marina ( Am ) leaf cuticle micro-zones (0.096 mm 2 ). The linear ranges for the established method were 10–1900 ng spot −1 for Ac , 15–1700 ng spot −1 for Ko and 30–1800 ng spot −1 for Am , and the detection limits were 0.06 ng spot −1 for Ac , 0.06 ng spot −1 for Ko and 0.07 ng spot −1 for Am . Notably, B[a]P formed clusters and unevenly distributed at the leaf cuticles. On the adaxial cuticles, B[a]P was mainly accumulated unevenly along the epidermis cell wall, and it was also distinctively distributed in the secretory cells around salt glands for Ac and Am . On the abaxial leaf cuticles, B[a]P was concentrated in the salt glands and stomata apart from being unevenly distributed in the epidermis cell wall. Moreover, the amount of B[a]P retained presented a negative correlation with the polarity of leaf cuticles, which resulted in the amount of B[a]P retained on the adaxial leaf cuticles being significantly higher than that on abaxial leaf cuticles. Our results provide a potential in situ method for investigating the distribution and retained amount of PAHs at plant leaf surface micro-zones, which would contribute to further studying and understanding the mechanism of migration and transformation of PAHs by plant leaves from a microscopic perspective.
研究领域:
植物学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Bingsen Wang,Haotian Zhang,Nan He,Haonan Wang,Bo Jiang,Dawei Tang,Lin Li
Salt deposition is one of the most significant obstacles to emerging solar interfacial desalination. Several strategies have recently been developed to combat salt deposition. However, the poor performance of most reported salt-resistant evaporators (<1.5 kg m -2 h −1 ) severely restricts the practical applications of this technology. Inspired by seawater-grown mangroves, we propose a bionic hydrogel-aerogel composite (HAC) evaporator with a respiratory root structure in this work. This bionic evaporator consists of a high-osmotic-pressure polyacrylamide (PAM) ionic hydrogel and a hydrophobic aerogel with vapor transport channels. The vapor escape surface is spatially separated from the salt deposition interface by constructing numerous vapor escape channels within the bionic evaporator, resulting in highly efficient salt-resistant evaporation. The HAC evaporator can run salt-free for 50 h in seawater with an evaporation rate of 2.7 kg m -2 h −1 , which is twice that of most salt-resistant evaporators. In addition, the evaporator can achieve evaporation rates of 2.4 kg m -2 h −1 in 20% brine. This design significantly improves the evaporation rate when resistant to salt accumulation, providing a novel strategy for developing highly efficient, long-term stable solar interfacial evaporators.
研究领域:
材料科学
·
环境科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
BIOORGANIC CHEMISTRY
·
2020
·
IF 4.831
Zhibo Hu,Zhihui Wu,Qinhua Su,Mingzhe Li,Shanshan Wu,Rongqi Meng,Weijia Ding,Chunyuan Li
To check whether the endophytic fungus from the host plant could produce novel bioactive metabolites induced by the host-derived chemical components, a strategy called “Induction of Endophyte Metabolism by Adding Host Components” (IEMAHC) was put up and applied. Cultivation of the endophytic fungus Botryosphaeria ramosa L29 derived from Myoporum bontioides after adding (2 R , 3 R )-3, 5, 7-trihydroxyflavanone 3-acetate, a constituent of the same plant, into the culture medium, led to the separation of three new chromones , 5-hydroxy-2, 3-dihydroxymethyl-7-methoxychromone ( 1 ), 5-hydroxy-3-acetoxymethyl-2-methyl-7- methoxychromone ( 2 ), 5, 7-dihydroxy-3-hydroxymethyl-2-methylchromone ( 3 ), one new isocoumarin , 8-hydroxy-3-hydroxymethyl-6-methoxy-7-methylisocoumarin ( 4 ), two new δ -lactones, botryopyrone ( 8 ) and (5 S , 8 R )-simplicilopyrone ( 9 ), one new naturally rare 2 (7 H )-oxepinone, botroxepinone ( 10) , and three known compounds ( 5 – 7 ). They were identified through comprehensive analysis of spectroscopic data. HPLC comparative analysis indicated that compounds 8 – 10 were induced products after adding (2 R , 3 R )-3, 5, 7-trihydroxyflavanone 3-acetate as an inducer. Compound 3 exhibited more potent inhibitory activities on Fusarium oxysporum , Fusarium graminearum , Penicillium italicum , and Colletotrichum musae than triadimefon. Compounds 1 , 2 , 4 – 7 and 9 displayed potent antifungal activities towards two or three tested fungi with MIC values equal or superior to triadimefon. The induced products 9 and 10 both showing strong inhibitory activity against C. musae , might play a role in strengthening the host defense against the common mangrove invasive pathogenic fungal genera Colletotrichum .
研究领域:
微生物学
·
植物化学
·
药理学
✓ 已验证
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2018
·
IF 3.974
Ruilong Li,Huadong Tan,Linlin Zhang,Shaopeng Wang,Yinghui Wang,Kefu Yu
Microplastics sorption of persistent organic pollutants (POPs) was the core processes that cause negative effects to biota, and their influencing factors and related mechanisms are poorly understood. In this study, we explored the impacts of water extractable organic matter (WEOM), an important source of endogenous dissolved organic matter in mangrove sediment, on the sorption coefficients of typical parent, alkyl and N/O/S-containing polycyclic aromatic hydrocarbons (PAHs) by microplastics. The presence of L-WEOM (D) impeded the PAHs sorption as the coefficients ( K f ) decreased to 10.17 (μg/kg)/(μg/L) n and to 8.39 (μg/kg)/(μg/L) n for fluorene (Flu) and 1-methyl-fluorene (1-M-Flu), respectively. The K f exhibited good linear relationships with the aliphaticity of L-WEOM ( p < 0.05) rather than the aromatic carbon/alkyl carbon content ( p > 0.05). Under the presences of L-WEOM (D), (S) and (K), the lone pair electrons of N/O/S-containing PAHs was the dominant factor contributing to the obvious difference of the K f values from the other groups. Moreover, the largest impact of L-WEOM (D) on the Flu sorption was in the case of PVC microplastics, while almost no effect was in the case of PS microplastics. The findings of our work may be helpful in improving our understanding of the role of WEOM on the sorption of PAHs to microplastics in the field mangrove sediment.
研究领域:
环境科学
·
生态学
✓ 已验证
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Siwen Chen,Cheng Liu,Yuyan Liu,Jianan Liu,Zefeng Wang,Haofeng Liu,Ye Li,Min Liu
With the wide application of phthalic acid esters (PAEs) in the manufacturing of plastic products, a large number of PAEs were discharged into marine ecosystem and accumulated in fish, which has posed a serious threat to marine ecological environment and fishery resources. However, the bioaccumulation of PAEs in fish in mangrove ecosystem, the most productive marine ecosystem, has not been well characterized. In this study, dominant fish and their potential food sources (including particulate organic matter (POM), sedimentary organic matter (SOM), Metapenaeus ensis (Shrimp) and Oreochromis (Ore) were collected from Dongzhai Harbor, a typical mangrove ecosystem. The concentrations of nine PAEs in fish and their potential food sources were determined. Then stable nitrogen and carbon isotope analysis, combined with a new Bayesian mixing model (MixSIMMR) was used to quantify the diet compositions of fish and elucidate the effect of dietary habit on PAEs bioaccumulation in fish. The results indicated that the median concentration of ∑ 9 PAEs in fish was 1119 μg/kg ww, positioning it at a moderate to low level in comparison to other regions. di-n-butyl phthalate (DBP) and diisononyl ortho-phthalate (DINP) were the dominant PAEs in fish. The PAEs concentration in demersal fish was significantly higher than that of pelagic fish, which may be attributed to the substantial contributions of shrimp (28.5 %) and POM (25.3 %) to the diet of demersal fish. This study provided new insights on the bioaccumulation of PAEs in dominant mangrove fish and confirmed that habitat preferences and food sources could significantly influence the bioaccumulation of PAEs in fish.
研究领域:
生态学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）