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Introduction: Long‐term spaceflight composite stress (LSCS) can cause adverse effects on human systems, including the central nervous system, which could trigger anxiety and depression. Aims: This study aimed to identify changes in hippocampus synaptic plasticity under LSCS. Methods: The present study simulated the real long‐term space station environment by conducting a 42‐day experiment that involved simulating microgravity, isolation, noise, circadian rhythm disruptions, and low pressure. The mood and behavior of the rats were assessed by behavior test. Transmission electron microscopy and patch‐clamp were used to detect the changes in synapse morphology and electrophysiology, and finally, the expression of NMDA receptor channel proteins was detected by western blotting. Results: The results showed that significant weight loss, anxiety, and depressive behaviors in rats were observed after being exposed to LSCS environment for 42 days. The synaptic structure was severely damaged, manifested as an obvious decrease in postsynaptic density thickness and synaptic interface curvature (p < 0.05; p < 0.05, respectively). Meanwhile, LTP was significantly impaired (p < 0.0001), and currents in the NMDAR channel were also significantly reduced (p < 0.0001). Further analysis found that LSCS decreased the expression of two key subtype proteins on this channel. Conclusion: These results suggested that LSCS‐induced depressive behaviors by impairing synaptic plasticity in rat hippocampus. [ABSTRACT FROM AUTHOR]

Illegal fishing is one of the sources of marine ecological damage. The implementation of compensation of ecological and environmental damage in this field is poorly understood. In this study, we examined data pertaining to coastal illegal fishing cases during 2018-2022 using the big data publicly made available by China Judgement Online. The main results included: 1) there are numerous types of illegal fishing, and more efforts should focus on the nature and extent of illegal fishing, with electrofishing and trawl being suitable entry points; 2) Special attention should be paid to the variation characteristics of rakes in the range of high illegal catch weight and value. It was suggested to optimize and adjust its management mode to avoid the frequent occurrence of such illegal fishing cases of rake; 3) The varieties of assessment models increased the uncertainty of damages computation, which might be reduced by establishing strong criteria for value quantification and damage assessment; 4) There is limited scientific support for the compensation for releasing the most popular ecological restoration technique for illegal fishing. As a result, the "compensation" design for "restoration" should be implemented, while the potential for additional restoration methods should be investigated.