Metal Contamination, Bioaccumulation, and Toxicity in Coastal Environments under Increasing Anthropogenic Impacts

Editorial

11 January 2024

Editorial: Metal contamination, bioaccumulation, and toxicity in coastal environments under increasing anthropogenic impacts

Li Zhang

Martin Tsz-Ki Tsui

Raymond W.M. Kwong

and

Ke Pan

1,065 views

0 citations

Editors

Ke Pan

Shenzhen University

Li Zhang

South China Sea Institute of Oceanology, Chinese Academy of Sciences (CAS)

Martin Tsui

The Chinese University of Hong Kong

Raymond WM Kwong

York University

Impact

Original Research

27 April 2023

Investigation on anthropogenic and opportunistic factors relevant to the incidence of stranded loggerhead sea turtle Caretta caretta along South Tyrrhenian coasts

Francesco Serra

, 11 more and

Maria Grazia Amoroso

2,337 views

2 citations

meretrix ovary. (A) p53 (white bars) and MT mRNA (black bars); (B) Bax (white bars) and Bcl-2 mRNA (black bars); (C) Caspase-3 mRNA. Different letters indicate significant (P < 0.05) differences among groups as revealed by Tukey’s post-hoc multiple comparison tests; Data are expressed as means ± SE (n = 6).

Original Research

01 December 2022

Cadmium-induced toxicity in Meretrix meretrix ovary is characterized by oxidative damage with changes in cell morphology and apoptosis-related factors

Binbin Bai

, 5 more and

Xueping Ying

1,359 views

5 citations

, (C) Isochrysis galbana, (D) Chaetoceros sp. and (E) Phaeodactylum tricornutum sp. sp., after 6-day exposure.

Original Research

24 November 2022

Copper uptake and subcellular distribution in five marine phytoplankton species

Peng Zhang

, 1 more and

Li Zhang

1,747 views

3 citations

Brief Research Report

12 August 2022

Ecological risk assessment of metallic nanoparticles on the marine environments: Species sensitivity distributions analysis

Sulan Feng

, 6 more and

Bin Xia

Metallic nanoparticles (NPs) are increasingly being used and inevitably entering the marine environment. Therefore, the adverse effects of NPs on individual marine species have attracted increasing attentions. However, to date, the ecological risks of NPs on the marine ecosystem remain poorly understood. In this study, species sensitivity distributions (SSDs) were constructed for Ag, ZnO, CuO, and TiO₂ NPs to understand their ecotoxicity to the marine ecosystem and the contribution of size effect and ion effect to the nanotoxicity. Furthermore, a case study on the assessment of marine ecological risk and marine environment carrying capacity of metallic NPs was performed in Jiaozhou Bay, China. The results showed the toxicity of metallic NPs to marine species following the order of Ag > ZnO > CuO > TiO₂. Both size effect and ion effect contributed to the toxicity of NPs. Environmental concentrations of Ag, ZnO, CuO, and TiO₂ NPs are much lower than the predicted no-effect concentrations, indicating that these metallic NPs have not yet posed risks to the marine ecosystem based on currently limited measured environmental concentrations of metallic NPs in seawater. And the marine environment carrying capacity of Ag, ZnO, CuO, and TiO₂ NPs in Jiaozhou Bay seawater were determined to be 5.03, 8.72, 93.06, and 629.79 t, respectively. The results help us understand the ecological risk of NPs in marine environments and provide a scientific basis for the sustainable development of nanotechnology.

2,444 views

8 citations

Original Research

09 June 2022

Toxicity and Bioaccumulation of Copper in Phaeodactylum tricornutum Under Different Macronutrient Conditions

Beibei Zhou

, 3 more and

Ke Pan

1,756 views

6 citations

Original Research

29 December 2021

Transcriptome Analysis of the Central Nervous System of Sea Slug (Onchidium reevesii) Exposed to Low-Frequency Noise

Zhihan Tu

, 3 more and

Heding Shen

Low-frequency noise has become a marine pollutant that cannot be ignored, but most studies have focused on the behavioral and physiological effects on marine vertebrates, with few studies in marine mollusks. Therefore, sea slug was used in this study to investigate the effect of low-frequency noise on its physiological aspects. This experiment was designed with different low-frequency noise (0, 100, 300, and 500 Hz) and different stimulation times (0, 6, and 12 h) to measure superoxide dismutase (SOD), malondialdehyde (MDA), and catalase (CAT) activities in hemolymph and transcriptomics in the control (C) and 6 and 12 h groups (L1 and L2) with 500 Hz noise. The results showed a positive correlation between antioxidant enzyme activity and low-frequency noise frequency (P < 0.05) and no correlation with time (P > 0.05). In central nervous system (CNS) transcriptomics, 2,460 and 3,268 genes had upregulated expression and 2,765 and 2,783 genes had downregulated expression in the L1 and L2 groups, respectively, compared to the C group. According to Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis, low-frequency noise mainly affects signaling pathways such as cytokine-cytokine receptor interaction, the FoxO signaling pathway, natural killer cell-mediated cytotoxicity, apoptosis immune-related pathways, and energy metabolic pathways such as glycolysis, the TCA cycle, and glycerophospholipid metabolism, as well as neurological pathways such as GABAergic synapses, the synaptic vesicle cycle, amyotrophic lateral sclerosis (ALS) and other neurological pathways. This study would provide valuable reference information on the potential response of mollusks to low-frequency noise stress.

3,317 views

10 citations