67 rare warm-water species appeared in Northern California due to an intense and lengthy marine heat wave. 37 had never been documented so far north. LouisSahagun reports:
suggest that the migrant species were drawn north by rising sea surface temperatures and changing currents during the marine heat wave — also known as the warm-water blob. The authors’ findings may provide a glimpse into California’s aquatic future and the ecological disruptions researchers say a warming climate is likely to bring.
The biggest impacts were seen in areas off Point Conception and Monterey Bay — vast underwater transition zones of deep canyons and climbing foothills. These regions are commonly swept by chilly south-flowing currents that block warmer southern waters.“During a marine heat wave, it is a bit like temporarily opening a door between lower latitudes and the northern coast,” Sanford said. “The longer the door is held open, the greater the number of southern species that will step through.
In addition, some rarely seen local species such as owl limpets and volcano barnacles experienced population explosions during the marine heat wave. Some tropical specimens including chocolate porcelain crabs, scarlet sea cucumbers and red-striped barnacles are now carefully monitored tenants in UC Davis aquariums.
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