Sea otters are also an example of a keystone species: they prey on sea urchins and keep the numbers of those echinoderms in check, determining the well-being of the whole ecosystem. Areas without sea otters are often deserts of urchins without any kelp forests, which support an extremely high number of species. The sea otters also keep mussels in check by removing them from rocks, allowing for greater biodiversity in those habitats as well. So, one can view these creatures as messengers of a sort, with their presence indicative of the health of the ecosystem on the whole.
Saturday, December 20, 2014
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Sea otters are also an example of a keystone species: they prey on sea urchins and keep the numbers of those echinoderms in check, determining the well-being of the whole ecosystem. Areas without sea otters are often deserts of urchins without any kelp forests, which support an extremely high number of species. The sea otters also keep mussels in check by removing them from rocks, allowing for greater biodiversity in those habitats as well. So, one can view these creatures as messengers of a sort, with their presence indicative of the health of the ecosystem on the whole.
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