What is it about?
Elephants are considered ecosystem engineers due to their impacts on savanna nutrient cycling during their lives, but until now we had not considered how those nutrient legacies may continue after they die. In this paper, we tested the impacts of nutrients from elephant carcasses on savanna ecosystems. We found that elephant carcasses release enormous pools of nutrients into savanna soils, stimulating soil microbial activity, increasing foliar nitrogen, and attracting herbivores to nutrient-rich grasses. Yet at the same time, these nutrient inputs suppressed plant and microbial diversity. Thus, nutrients from elephant carcasses create coldspots of biodiversity but hotspots of ecosystem processes that last for at least 8 years after they die.
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Why is it important?
This work informs our understanding of how nutrient heterogeneity is generated in savanna ecosystems and also highlights a key functional role that could be lost as elephant populations are extirpated from their native habitats.
Perspectives
We have long known that whale falls in the deep ocean create hotspots of biodiversity and ecological activity, but until now we had not tested for a terrestrial equivalent. The biodiversity coldspots generated by elephant carcasses stand in stark contrast to biodiversity-increasing effects of whale falls, showing that the nutrient legacies from elephant carcasses play a unique ecological role.
Courtney Reed
University of California Santa Barbara
Read the Original
This page is a summary of: Nutrient legacies from elephant megacarcasses create coldspots of biodiversity and hotspots of ecosystem processes, Proceedings of the National Academy of Sciences, October 2026, Proceedings of the National Academy of Sciences,
DOI: 10.1073/pnas.2605332123.
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