Not just semantics: CO2 fertilization can be a disturbance leading to worldwide forest degradation

Abstract

Societal Impact Statement The physiological effects of increased atmospheric CO2 (CO2 fertilization) on intact forests are generally seen as a process that might buffer them against the impacts of climate change. However, CO2 fertilization can also cause adverse changes in forest conditions, such as alterations in species composition and reduced ecosystem moisture availability. Because of this, we argue that the effect of CO2 fertilization is a disturbance that leads to changes in the functioning of worldwide forests and causes low‐intensity degradation of these ecosystems. This demonstrates that even the most remote forests in the world have been altered by human action via CO2 fertilization, and the responsibility for their integrity must be shared globally.

Keywords

• Amazon
• degradation
• rainfall
• transpiration
• tree community shifts
• tropical carbon sink