The average size of trees in the Amazon Rainforest is gradually increasing as carbon dioxide levels rise. This means that these larger trees play a crucial role in determining whether the forest acts as a carbon sink.
How forests adapt to changing climates remains a significant question. One theory suggests that larger trees are more vulnerable to reductions as they face challenges from climate-related phenomena, such as droughts and high winds. Understanding how forests respond to these changes is crucial for future climate models.2 It’s essential to address atmospheric issues to mitigate global warming.
Adriane Esquivel-Muelbert from Cambridge University and her team at the Rainfor Amazon Forest Inventory Network have measured tree diameters in 188 plots averaging 12,000 square meters across the Amazon Basin. The monitoring period varied, with some plots observed for around 30 years. Meanwhile, 2 atmospheric concentrations are reaching near record levels.
“We monitor certain areas in the forest where the average tree size has increased over time. This indicates that these trees are capable of storing more carbon than they did in the past,” researchers noted, highlighting an average diameter increase of about 3.3% every decade.
“The structural composition of the Amazon forest is continually changing throughout the basin,” says team member Rebecca Bunberry Morgan from the University of Bristol, UK. “There are more sizable trees and fewer smaller ones, indicating a shift in average size towards larger trees.”
She adds that the average diameter of trees in mature, undisturbed forest areas remains relatively constant as they replace and grow larger trees where seedlings have fallen. Researchers believe that Amazon trees are responding positively to the increasing atmospheric 2 levels, resulting in enhanced growth and biomass accumulation. “Larger trees tend to thrive as they compete more effectively for light and water,” remarks Esquivel-Muelbert.
This implies that large trees are disproportionately vital for the carbon storage capacity of the forest, meaning their loss would have significantly adverse effects, she concludes.
“A key finding is that 2 wood serves as a globally significant carbon sink, functioning as a fertilizer that promotes tree growth while being influenced by many factors.” Peter Etchells at Durham University, UK, states, “However, this could change as climate continues to evolve, potentially impacting the balance of growth, nutrient availability, temperature, and CO.2?”
topic:
- carbon/
- Amazon rainforest
Source: www.newscientist.com
