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Sep 9, 2019 · Dead great white sharks that washed up on South African beaches without their livers were thought to have been victims of orca attacks.
What would happen if we let our fear of sharks lead people to kill them all? This is the question Joe Hanson asks in this video from PBS Digital Studios. Find out about how the removal of sharks affects the food web, ecosystem balance, and why sharks are particularly vulnerable to human threats.
Without sharks to keep down the population, those algae-eaters are more likely to be swallowed up by their natural predators, who rise to the top of the chain with no one to hunt them. Absent the bottom-feeders, algae grow wild, damaging coral reefs and other vegetation, as well as clogging up fish gills and contaminating seafood and water ...
Aug 26, 2021 · Since 1970, the population of oceanic sharks has dropped by 71%, and many species are facing extinction. If you're not a big fan of sharks, this might seem like a good thing, but the absence of sharks would be devastating to ocean life.
- Rob Michaelson
Nov 28, 2023 · When removed from the ecosystem, the entire system collapses. This happens because sharks regulate the ecosystem, maintaining biodiversity by exerting pressure on or controlling the populations of mesopredators (the next levels in the food chain).
Aug 11, 2014 · And because sharks play a vital role in the ocean's food chain, a major decrease in the shark population -- or even extinction -- could trigger things like out-of-control algae or...
Jan 27, 2021 · Scientists say sharks and rays are disappearing from the world's oceans at an "alarming" rate. The number of sharks found in the open oceans has plunged by 71% over half a century, mainly due...
