Wherever there are oceans, there are sharks. They occupy waters from the poles to the equator, from miles deep to the oceans’ surface, from mid-oceans to knee-deep waters along the shorelines. Wherever they exist, though, they serve many invaluable ecological functions. However, since 1970 the global populations of sharks and rays have declined by 70 percent. A newly published study shows why that is such an urgent problem and why nations must rethink where and how to conserve sharks.
Oceans without sharks would be far less healthy – new research
https://theconversation.com/oceans-without-sharks-would-be-far-less-healthy-new-research-231783
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