A caller reappraisal insubstantial led by scientists astatine UC San Diego’s Scripps Institution of Oceanography warns that the accelerated nonaccomplishment of oxygen from the water and different aquatic ecosystems is pushing Earth toward an “unsafe space,” pinch consequences that could beryllium irreversible connected quality timescales.
The study reviews the wide interactions betwixt aquatic deoxygenation — the diminution of dissolved oxygen successful the water (ocean deoxygenation), coastal waters, rivers, lakes and streams — and the 9 processes outlined by the Planetary Boundaries framework. First introduced successful 2009, the model identifies captious Earth strategy processes and the ways quality activities are pushing them beyond the conditions needed to support the satellite unchangeable and resilient.
The 9 planetary boundaries are ambiance change, water acidification, biodiversity loss, atmospheric aerosol loading, stratospheric ozone depletion, freshwater change, land-use change, chemic contamination and biogeochemical flows (including the nitrogen cycle). The authors propose adding dissolved oxygen conditions to the framework.
“The wellness and stableness of our satellite depends connected the wellness and stableness of aquatic ecosystems, which request oxygen to usability normally,” said lead writer Erica Ferrer, a Scripps Oceanography alumna and existent postdoctoral clever clever astatine UC Santa Barbara’s National Center for Ecological Analysis and Synthesis. “This study is designed to elevate the floor plan of aquatic deoxygenation arsenic a world threat and show that it does not run successful isolation.”
Aquatic deoxygenation is driven chiefly by human-caused warming, excess nutrient contamination and changes successful the ventilation of interior waters. Oxygen nonaccomplishment disrupts the biologic and chemic processes that thief modulate Earth's ambiance and it threatens aquatic life ranging from microscopic organisms to food and sharks. Although marine mammals respire aerial astatine the surface, they tin still beryllium affected arsenic oxygen nonaccomplishment alters their prey, habitats and nutrient webs.
Ferrer and Scripps biologic oceanographer Lisa Levin, the study’s elder author, conceived the thought for the insubstantial aft attending COP25, the 2019 United Nations Climate Change Conference held successful Madrid. They dream the reappraisal encourages scientists and policymakers to see the drivers and impacts of aquatic deoxygenation successful operation pinch different planetary stressors.
“Adding aquatic deoxygenation to the Planetary Boundaries model will thief america understand its impacts connected Earth strategy stability,” said Ferrer. “Mitigating its impacts represents a captious constituent of maintaining biodiversity and climate.”
Ferrer conducted this reappraisal arsenic portion of her doctoral investigation astatine Scripps, supported by the National Science Foundation’s Graduate Research Fellowship Program and postgraduate costs from Scripps and UC San Diego, followed by postdoctoral support from UC Santa Cruz and UC Santa Barbara.
The study was published June 30, 2026, successful the diary Limnology and Oceanography. Additional authors see 4 erstwhile Scripps PhD students — Shailja Gangrade, Lillian McCormick, Ariel Pezner and Yassir Eddebbar, who is now a Scripps ambiance intelligence — on pinch De'Marcus Robinson of UCLA, Véronique Carcon of the Institut de Physique du Globe de Paris and Kevin Rose of the Rensselaer Polytechnic Institute.
Read the study: Abundant interactions and feedbacks betwixt aquatic deoxygenation and the different planetary boundaries propose “unsafe” levels of oxygen nonaccomplishment pinch far-reaching impacts
About Scripps Oceanography
Scripps Institution of Oceanography astatine the University of California San Diego is 1 of the world’s astir important centers for world world subject investigation and education. In its 2nd period of discovery, Scripps scientists activity to understand and protect the planet, and analyse our oceans, Earth, and ambiance to find solutions to our top biology challenges. Scripps offers unparalleled acquisition and training for the adjacent procreation of technological and biology leaders done its undergraduate, master’s and doctoral programs. The institution besides operates a fleet of 4 oceanographic investigation vessels, and is location to Birch Aquarium astatine Scripps, the nationalist exploration halfway that welcomes 500,000 visitors each year.
About UC San Diego
At the University of California San Diego, we clasp a civilization of exploration and experimentation. Established successful 1960, UC San Diego has been shaped by exceptional scholars who aren’t acrophobic to look deeper, situation expectations and redefine accepted wisdom. As 1 of the apical 15 investigation universities successful the world, we are driving invention and alteration to beforehand society, propel economical maturation and make our world a amended place. Learn much astatine ucsd.edu.
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