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10 Νοε 2006 · Purple sea urchins (Strongylocentrotus purpuratus) are among the best studied species. They live in environments that alternate between two stable states: luxuriant, species-rich kelp forests and sea urchin–dominated “barrens.”
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closely related sea urchin genomes, this model could be...
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Strongylocentrotus purpuratus is a species of sea urchin in the family Strongylocentrotidae commonly known as the purple sea urchin. It lives along the eastern edge of the Pacific Ocean extending from Ensenada, Mexico, to British Columbia, Canada. [1]
The Purple Sea Urchin is one of the most common sea urchins found on Sydney's coast. Identification. Colours can vary so dramatically in this species, from light olive green to pink to a dark purple, that the Purple Sea Urchin was once thought to be three separate species.
31 Μαρ 2023 · Purple sea urchins are an ecologically important coastal species that aids in regulating kelp forests densities through algal grazing (Osovitz and Hoffman 2015). Purple urchins are usually detritovores, however when kelp litter is reduced urchins can shift from drift feeding to active foraging on macroalgae (Carr and Reed 2016).
The urchin defends itself against seastars by lowering its spines, retracting its tube feet, raising its pedicellariae, and moving to another spot. Sea otter bones are stained purple from the pigment in this urchin's spines. The species tolerates a wide range of temperatures and salinities, from 5 to 23.5C and 80-110% seawater in the lab.
The purple sea urchin thrives amid strong wave action and areas with churning aerated water. The giant kelp forests provide a feast for S. purpuratus . Many sea urchins can be found on the ocean floor near the holdfast of the kelp.
Purple sea urchin. Strongylocentrotus purpuratus. Enlarge. On view at the Aquarium in Rocky Shore, Giant Pacific Octopus. Meet the purple sea urchin. A purple sea urchin's pincushion appearance comes from its round inner shell, called a "test."
