Joshua Stewart
Marine ecologist at Oregon State University whose research focuses on marine mammal ecology and Arctic benthic ecosystems, and who investigated gray whale mortality events discussed in this episode.
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Mar 11, 2026 • 13min
We saved gray whales from extinction. Why are so many dying again?
Joshua Stewart, a marine ecologist at Oregon State University who studies marine mammals and Arctic benthic ecosystems, joins to unpack repeating mass gray whale deaths. He describes historical boom-and-bust mortality patterns. He traces the shift from disease hunts to linking whale declines with Arctic prey cycles and climate-driven food shortages. He considers limits to human intervention and whales as climate warning signs.
