Ocean Cross Section (IMAGE) Woods Hole Oceanographic Institution Caption An influx of nutrients to the ocean -- catalyzed by higher temperatures -- stimulates organic matter production and subsequent decomposition, consuming oxygen in the process. This is thought to be primarily responsible for large-scale oxygen loss in ancient oceans, leading to mass extinctions in the marine environment. Unfortunately, the modern ocean is exhibiting similar symptoms. Credit Natalie Renier, Woods Hole Oceanographic Institution Usage Restrictions with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.