Tree Bark Harbors a Microbiome Key to Global Climate
The extent of tree bark across the planet equals the surface of land, a fact that reveals the magnitude of an invisible and massive ecosystem. This habitat, frequently ignored, supports a huge diversity of microorganisms still uncataloged by science, which maintain constant interaction with the atmosphere. 🌍
A Microscopic Atmospheric Regulator
Communities of bacteria and fungi living in the bark have the capacity to process gases relevant to global warming. Their metabolism determines whether this ecosystem functions as a sink that captures gases or, conversely, as a source that releases them. This balance directly influences global biogeochemical cycles, although its net impact remains unquantified precisely.
Key Interactions with Greenhouse Gases:- Some microbes consume atmospheric methane, helping to mitigate climate change.
- Other microbial groups produce and emit methane or nitrogen oxides, enhancing warming.
- The net metabolic activity determines the final role of the bark as a sink or source.
In the race to understand the climate, we've been looking at the forest and literally forgetting the tree bark.
Mapping the Hidden Biodiversity
Science now employs advanced genomic techniques to explore this microscopic universe. The main objective is to identify which species inhabit there and understand how they respond to environmental variables. This knowledge is the first step to assess how the bark microbiome may change with the climate and, in turn, modify global processes.
Factors Shaping the Bark Ecosystem:- The host tree species and the chemistry of its bark.
- The local climate, including temperature and humidity.
- The impact of atmospheric pollution on microbial communities.
A Climate Feedback Loop
Understanding these dynamics is urgent to predict a potential feedback loop. If climate change alters these microbiomes, their new configuration could emit or absorb gases differently, which in turn would feed back