In this week's Fix the Planet newsletter, adamvaughan_uk asks whether tree diversity can help the climate
, with sycamores among the species proposed to replace them.
Tree diversity’s most important role in storing carbon could be the way it prevents forests flipping to other ecosystem types that hold less carbon, such as savannah, says Christian Wirth, also at iDiv. For example, different types of trees have different tolerances to drought, allowing for a turnover of tree species that keeps the forest intact.
As temperatures rise, from a global average of 1.1°C above pre-industrial levels now to at least 1.5°C in the next 20 years, that ability to survive and keep carbon locked up will be key. “Resilience is very important for forest and will be an important mechanism to allow forest to adapt to climate change, and inevitably there will be some winners and losers in the face of climate change,” says Wheeler.
Nonetheless, he says there is reasonable evidence that diverse temperate forests produce woody growth more rapidly than less diverse ones, drawing down and locking away more carbon. “But it is less clear whether these effects extend to diverse tropical forests,” he says.
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