In the context of the intersection between technological competition and geopolitical security, research governance is increasingly oriented towards national security. In 2025, with Trump's return to power, U.S. research policy rapidly shifts from "open collaboration" to "security−driven" priorities, with comprehensive adjustments in research funding, cooperation mechanisms, talent policies, and regulatory systems. This paper first reviews the institutional foundations of the U.S. as a technological superpower and systematically analyzes the policy shifts under the Trump 2.0 administration in areas such as research budgets, international collaboration, talent mobility, and issue regulation, revealing a paradigm shift in the U.S. research system. It then further analyzes the response strategies of major countries and outlines the restructuring trends in the global research landscape. The study concludes that the U.S. policy shift is driving the global research landscape towards a more polarized and diversified structure. Finally, it suggests that China should build a research governance system with strategic resilience and global adaptability.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |