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IMAGE: This Airyscan super-resolution image shows that fucose-containing sulphated polysaccharide, or FCSP, (in green) occurred around the cells of the chain-forming diatom Chaetoceros socialis and their spines. Sample collected during the. view more
Credit: Max Planck Institute for Marine Microbiology/S. Vidal-Melgosa
A major pathway for carbon sequestration in the ocean is the growth, aggregation and sinking of phytoplankton - unicellular microalgae like diatoms. Just like plants on land, phytoplankton sequester carbon from atmospheric carbon dioxide. When algae cells aggregate, they sink and take the sequestered carbon with them to the ocean floor. This so called biological carbon pump accounts for about 70 per cent of the annual global carbon export to the deep ocean. Estimated 25 to 40 per cent of carbon dioxide from fossil fuel burning emitted by humans may have been transported by this process from the atmosphere to depths below 1000 meter, where carbon
European Starlings Global Success Reveals Evolution Doesn t Always Take Millions Of Years
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Environmental News Network - Researchers Demonstrate New Method to Track Genetic Diversity of Salmon, Trout
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OSU, USFS researchers use new method to track salmon, trout genetic diversity
Jonny Armstrong, Oregon State University
A spawning redband trout (O. mykiss) from the Upper Klamath Basin.
CORVALLIS, Ore. (KTVZ) – Scientists at Oregon State University and the U.S. Forest Service have demonstrated that DNA extracted from water samples from rivers across Oregon and Northern California can be used to estimate genetic diversity of Pacific salmon and trout.
The findings, just published in the journal Molecular Ecology, have important implications for conservation and management of these species, which are threatened by human activities, including those exacerbating climate change.
“There has been a dearth of this kind of data across the Northwest,” said Kevin Weitemier, a postdoctoral fellow at Oregon State and lead author of the paper. “This allows us to get a quick snapshot of multiple populations and species all at once.”
In the fight to save the vaquita, conservationists take on cartels
The critically endangered vaquita porpoise, a species endemic to the Sea of Cortez in the Upper Gulf of California in Mexico, is at severe risk of extinction due to illegal gillnet fishing for the critically endangered totoaba fish.
Andrea Crosta of Earth League International (ELI) says the key to saving the species is arresting all criminals involved in the illegal totoaba trade, while other NGOs work to patrol the Sea of Cortez for illegal gillnet use or to introduce seafood sanctions.
With only nine vaquita porpoises believed to be left in the world, most experts agree that this year will be critical to the vaquita’s survival.