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Microbes a key factor in climate change

Microbes a key factor in climate change

Preface. The IPCC, like economists, assumes our economy and burning of fossil fuels will grow exponentially until 2100 and beyond, with no limits to growth. But conventional oil peaked and has stayed on a plateau since 2005, so clearly peak global oil production is in sight. As is peak soil, aquifer depletion, biodiversity destruction, and deforestation to name just a few existential threats besides climate change.

The lack of attention to microbes in the IPCC model further weakens their predictions about the trajectory of climate change. As this article notes, diatoms are our friends, they “perform 25–45% of total primary production in the oceans, owing to their prevalence in open-ocean regions when total phytoplankton biomass is maximal. Diatoms have relatively high sinking speeds compared with other phytoplankton groups, and they account for ~40% of particulate carbon export to depth”.

Diatoms didn’t appear until 40 million years ago, and sequester so much carbon that they caused the poles to form ice caps. So certainly scientists should study whether their numbers are decreasing or increasing. But also the IPCC needs to include diatoms and other microbes in their models. It’s a big deal that they haven’t, since microorganisms support the existence of all higher life forms.

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University of New South Wales. 2019. Leaving microbes out of climate change conversation has major consequences, experts warn. Science Daily.

Original article: Cavicchioli, R., et al. 2019. Scientists’ warning to humanity: microorganisms and climate change. Nature Reviews Microbiology.

More than 30 microbiologists from 9 countries have issued a warning to humanity — they are calling for the world to stop ignoring an ‘unseen majority’ in Earth’s biodiversity and ecosystem when addressing climate change.

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