Marine Ecology
Researchers at McGill University have reconstructed a 130-million-year-old marine ecosystem from Colombia, revealing predators that operated at a seventh trophic level, higher than any in modern oceans. This discovery highlights the intense complexity of ancient seas during the Cretaceous period. The findings underscore how competition drove the evolution of today's marine biodiversity.
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A mysterious pathogen is causing widespread deaths among sea urchin populations worldwide, with severe impacts in the Canary Islands. The reef-grazing species Diadema africanum has reached historic lows, threatening marine ecosystems. Scientists report halted reproduction and near-extinction risks in affected areas.
October 21, 2025 11:36