Ocean chemistry
Site news
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New analysis of isotopes preserved in ancient seafloor sediments suggests oxygen levels in Earth’s deep ocean stabilized at modern-day levels long after the rapid burst of evolution that gave us most major animal groups.
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Stanford scientists have discovered multiple forms of a ubiquitous enzyme in microbes that thrive in low-oxygen zones off the coasts of Central and South America. The results may open new possibilities for growing crops with fewer resources and understanding ocean carbon storage.
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With support from a Stanford Doerr School of Sustainability Accelerator seed grant, an interdisciplinary team has developed a groundbreaking optical sensor that measures DNA and other key molecules in seawater using light, potentially revolutionizing the study of biodiversity in the enigmatic depths below the ocean’s surface.
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A new Stanford University study shows rising oxygen levels may explain why global extinction rates slowed down over the past 541 million years. Below 40 percent of present atmospheric oxygen, ocean dead zones rapidly expand, and extinctions ramp up.
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Researchers present new evidence that the deoxygenation of the ocean wiped out biodiversity during one of the “Big Five” mass extinctions in Earth’s history – relevant information as climate change contributes to decreasing oxygen in the oceans today.
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Why did the first big, complex organisms spring to life in deep, dark oceans where food was scarce? A new study finds great depths provided a stable, life-sustaining refuge from wild temperature swings in the shallows.
