Do whales really increase the oceanic removal of atmospheric carbon?

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Meynecke, Jan-Olaf
Samanta, Saumik
de Bie, Jasper
Seyboth, Elisa
Prakash Dey, Subhra
Fearon, Giles
Vichi, Marcello
Findlay, Ken
Roychoudhury, Alakendra
Mackey, Brendan
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2023
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Abstract

Whales have been titled climate savers in the media with their recovery welcomed as a potential carbon solution. However, only a few studies were performed to date providing data or model outputs to support the hypothesis. Following an outline of the primary mechanisms by which baleen whales remove carbon from the atmosphere for eventual sequestration at regional and global scales, we conclude that the amount of carbon whales are potentially sequestering might be too little to meaningfully alter the course of climate change. This is in contrast to media perpetuating whales as climate engineers. Creating false hope in the ability of charismatic species to be climate engineers may act to further delay the urgent behavioral change needed to avert catastrophic climate change impacts, which can in turn have indirect consequences for the recovery of whale populations. Nevertheless, whales are important components of marine ecosystems, and any further investigation on existing gaps in their ecology will contribute to clarifying their contribution to the ocean carbon cycle, a major driver of the world’s climate. While whales are vital to the healthy functioning of marine ecosystems, overstating their ability to prevent or counterbalance anthropogenically induced changes in global carbon budget may unintentionally redirect attention from known, well-established methods of reducing greenhouse gases. Large scale protection of marine environments including the habitats of whales will build resilience and assist with natural carbon capture.

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Frontiers in Marine Science

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10

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© 2023 Meynecke, Samanta, de Bie, Seyboth, Prakash Dey, Fearon, Vichi, Findlay, Roychoudhury and Mackey. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Ecology

Geology

Oceanography

Science & Technology

Life Sciences & Biomedicine

Environmental Sciences

Marine & Freshwater Biology

Environmental Sciences & Ecology

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Meynecke, J-O; Samanta, S; de Bie, J; Seyboth, E; Prakash Dey, S; Fearon, G; Vichi, M; Findlay, K; Roychoudhury, A; Mackey, B, Do whales really increase the oceanic removal of atmospheric carbon?, Frontiers in Marine Science, 2023, 10, pp. 1117409

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