Big trees in Amazon more climate-resistant than previously believed
a day ago
- #carbon sequestration
- #climate resilience
- #Amazon rainforest
- Big trees in the Amazon are growing larger and more numerous, helping sequester carbon dioxide.
- Undisturbed tropical forests remain effective carbon sinks despite climate challenges like rising temperatures and droughts.
- The resilience of big trees is at risk from deforestation, fires, and land clearance for agriculture and infrastructure.
- Brazil's plan to pave the BR-319 road threatens pristine Amazon forests, while Bolivia continues deforestation for soy and cattle.
- A study involving nearly 100 researchers found tree trunks thickened by 3.3% per decade, with larger trees showing the most growth.
- Big trees like Brazil nut trees and kapoks dominate the canopy and play a crucial role in carbon and water cycling.
- Protected forest areas are vital allies in climate stabilization but insufficient to offset global carbon emissions.
- Deforested or fragmented areas, especially in the southeast Amazon, have shifted from carbon sinks to carbon sources.
- Big trees are vulnerable to wind, fire, and drought when isolated or near forest edges.
- Recent studies show big trees have deep roots, challenging past assumptions about their vulnerability to climate change.
- Big trees account for 1% of forest trees but 50% of carbon storage and water cycling, making their loss ecologically significant.