San Francisco (AP) —Satellite image analysis reveals that the kelp forest that formed a lush canopy along the coast of Northern California just eight years ago is almost gone.
Looking at satellite images of the Sonoma and Mendocino coasts dating back to 1985, researchers at the University of California, Santa Cruz found that Kelp forests have declined by an average of 95% since 2013. According to their study, the destruction reported on Friday that the San Francisco Chronicle had a purple sea urchin population that ate it and two hot water events that lasted from 2014 to 2016.
Around that time, wasting disease struck the sunflower starfish, a predator of the sunflower starfish, allowing the pointed ones to take over the great appetite of kelp.
Researchers studying kelp and its dependent species, such as jellyfish, abalone, and red sea urchins, which are popular with divers and sushi lovers, can find it difficult to get rid of purple sea urchins, and the forest will soon be available. He says he won’t recover.
“They can actually survive starvation,” said Meredith McPherson, a graduate student and co-author of the study at the University of California, Santa Cruz, School of Marine Science. “The effect is basically that there are no kelp forests left.”
Already due to deforestation, California regulators stopped recreational diving in red abalone in 2018, closing the commercial red sea urchin fishery in Mendocino County almost completely.
Scientists have already been monitoring the decline of kelp forests with aerial photographs and tidal data for many years. However, the new study was the first to use satellite imagery to more closely analyze changes in growth as well as seawater temperature and nutrient levels.
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UC Researchers Find North Coast Kelp Forest Nearly Wiped Out – CBS San Francisco Source link UC Researchers Find North Coast Kelp Forest Nearly Wiped Out – CBS San Francisco