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Author: Wiida Fourie-Basson
Published: 06/04/2021
What can the decomposed leaf litter from 40 streams on six continents tell us about the impact of biodiversity loss on global carbon fluxes?
According to a study published in
Science Advances today (26 March 2021), there is reason to be concerned, especially at low latitudes where the rate of deforestation and conversion of forest to monoculture, plantations and agricultural land are already high.
The decomposition of plant litter in streams is a fundamental ecosystem service, as it mainly serves as a sink for carbon, thereby keeping the global carbon budget in balance. When the optimal functioning of that ecosystem service is disturbed, some of the world s rivers could become a source rather than a sink for carbon, creating potential feedbacks on climate.
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Healthy human bodies are good at regulating: Our temperatures remain around 98.6 degrees Fahrenheit, no matter how hot or cold the temperature around us. The sugar levels in our blood remain fairly constant, even when we down a glass of juice. We keep the right amount of calcium in our bones and out of the rest of our bodies.
We couldn t survive without that regulation, called homeostasis. And when the systems break down, the results can cause illness or, sometimes, death.
In presentations at the American Association for the Advancement of Science s annual meeting, researchers argued that mathematics can help explain and predict those breakdowns, potentially offering new ways of treating the systems to prevent or fix them when things go wrong. The meeting was held virtually earlier this year because of the COVID-19 pandemic.
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