In this episode, we welcome marine biologist Dr. Heneghan for a deep-dive conversation on his recent study predicting the future dynamics of oceanic life, with a specific focus on zooplankton. This research sheds light on how shifting oceanic environments, particularly in tropical regions, could result in dominance by carnivorous and gelatinous filter-feeding zooplankton, pushing out omnivorous copepods and euphausiids.

Dr. Heneghan expertly outlines how these changes could create a more direct energy pathway from phytoplankton to fish, reshaping the energy flows within marine ecosystems. However, this shift also comes with drawbacks. With declining phytoplankton biomass and the rise of less nutritious food sources, the carrying capacity for future fish communities could decrease.

The conversation takes a worrying turn as Dr. Heneghan suggests these changes could slightly exacerbate the projected decline in small pelagic fish biomass in tropical regions by 2100. The model's implications extend beyond marine biology, touching on global fisheries, food security, and biodiversity issues.

In this episode, we invite you to explore the shifting tides of marine life under the influence of climate change. Be part of this captivating journey with Dr. Heneghan and gain a deeper understanding of our oceans' future. This is a crucial conversation for anyone passionate about the ocean, its life, and its future.

Heneghan, R.F., Everett, J.D., Blanchard, J.L. et al. Climate-driven zooplankton shifts cause large-scale declines in food quality for fish. Nat. Clim. Chang. 13, 470–477 (2023). https://doi.org/10.1038/s41558-023-01630-7