Sweet spots in the sea: Mountains of sugar under seagrass meadows NatureEcoEvo
dioxide on Earth: One square kilometer of seagrass stores almost twice as much carbon as forests on land, and can do so 35 times as fast. Now scientists from the Max Planck Institute for Marine Microbiology in Bremen, Germany, have discovered that seagrasses release massive amounts of sugar into their soils, the so-called. Sugar concentrations underneath the seagrass were at least 80 times higher than previously measured in marine environments.
"In our experiments, we added phenolics isolated from seagrass to the microorganisms in the seagrass rhizosphere—and indeed, much less sucrose was consumed compared to when no phenolics were present." Intriguingly, a small set of microbial specialists are able to thrive on the sucrose despite the challenging conditions. Sogin speculates that these sucrose specialists are not only able to digest sucrose and degrade phenolics, but might provide benefits for the seagrass by producing nutrients it needs to grow, such as nitrogen.
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