Rose Kevin C, Ferrer Erica M, Carpenter Stephen R, Crowe Sean A, Donelan Sarah C, Garçon Véronique C, Grégoire Marilaure, Jane Stephen F, Leavitt Peter R, Levin Lisa A, Oschlies Andreas, Breitburg Denise
Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, NY, USA.
Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA.
Nat Ecol Evol. 2024 Aug;8(8):1400-1406. doi: 10.1038/s41559-024-02448-y. Epub 2024 Jul 15.
Planetary boundaries represent thresholds in major Earth system processes that are sensitive to human activity and control global-scale habitability and stability. These processes are interconnected such that movement of one planetary boundary process can alter the likelihood of crossing other boundaries. Here we argue that the observed deoxygenation of the Earth's freshwater and marine ecosystems represents an additional planetary boundary process that is critical to the integrity of Earth's ecological and social systems, and both regulates and responds to ongoing changes in other planetary boundary processes. Research on the rapid and ongoing deoxygenation of Earth's aquatic habitats indicates that relevant, critical oxygen thresholds are being approached at rates comparable to other planetary boundary processes. Concerted global monitoring, research and policy efforts are needed to address the challenges brought on by rapid deoxygenation, and the expansion of the planetary boundaries framework to include deoxygenation as a boundary helps to focus those efforts.
行星边界代表了地球主要系统过程中的阈值，这些过程对人类活动敏感，并控制着全球范围内的宜居性和稳定性。这些过程相互关联，以至于一个行星边界过程的变化可能会改变跨越其他边界的可能性。在此，我们认为，地球淡水和海洋生态系统中观测到的脱氧现象代表了另一个行星边界过程，它对地球生态和社会系统的完整性至关重要，并且既调节其他行星边界过程的持续变化，又对这些变化做出响应。对地球水生栖息地快速且持续的脱氧现象的研究表明，正在以与其他行星边界过程相当的速度接近相关的关键氧气阈值。需要全球协同监测、研究和政策努力，以应对快速脱氧带来的挑战，将行星边界框架扩展至将脱氧纳入其中作为一个边界，有助于集中这些努力。
