Nitrite serves as a key intermediate in the nitrogen cycle, with its microbial‐driven cycling regulated by various environmental factors. However, how nitrite cycling responds to changing environmental conditions remains unclear. Here, we address this question by integrating natural abundance stable isotope techniques with geochemical modeling in China's largest estuary—the Changjiang (Yangtze River) estuary—and its adjacent c...

Accelerated Arctic sea-ice melt is profoundly reshaping global shipping patterns and trade networks, with particularly significant implications for the China–Europe maritime corridor. To assess the resilience of China–EU maritime trade under these evolving conditions, this study develops a dual-dimensional scenario analysis framework that integrates both climate-change and geopolitical risks. We introduce an innovative coupled...

Toxic dinoflagellate blooms and microplastics are widespread coastal pollutants. In this study, the scallop, Argopecten irradians, was selected as an experimental organism to systematically investigate the single and combined toxic effects of polystyrene (PS) and the toxic dinoflagellate, Alexandrium pacificum. The results showed that both PS and algal cells could be ingested by A. irradians. The survival rate of A. irradians...

As human activities intensify, ecosystems are constantly being polluted by microplastics, which may change the microbe-driven nitrogen cycling and associated nitrous oxide emissions therein. However, the exact impact of microplastics on specific nitrogen cycling processes remains to be clarified, limiting accurate assessments of nitrous oxide production. Additionally, a gap in our understanding of the isotopic dynamics of nitr...