Warming induces unexpectedly high soil respiration in a wet tropical forest
Tropical forests are a dominant regulator of the global carbon cycle, exchanging more carbon dioxide with the atmosphere than any other terrestrial biome. Climate models predict unprecedented climatic warming in tropical regions in the coming decades; however, in situ field warming studies are severely lacking in tropical forests. Here we present results from an in situ warming experiment in Puerto Rico, where soil respiration responses to <sup>+</sup>4 <sup>o</sup>C warming were assessed half-hourly for a year. Soil respiration rates were 42-204% higher in warmed relative to ambient plots, representing some of the highest soil respiration rates reported for any terrestrial ecosystem. While respiration rates were significantly higher in the warmed plots, the temperature sensitivity (Q<sub>10</sub>) was 71.7% lower, pointing to a mechanistic shift. Even with reduced Q<sub>10</sub>, if observed soil respiration rates persist in a warmer world, the feedback to future climate could be considerably greater than previously predicted or observed.
Authors
- Aura M. Alonso‐Rodríguez (ORCID: https://orcid.org/0000-0002-6500-9503)
- Iana F. Grullón‐Penkova (ORCID: https://orcid.org/0000-0002-3280-9432)
- Molly A. Cavaleri (ORCID: https://orcid.org/0000-0003-0984-611X)
- Sasha C. Reed (ORCID: https://orcid.org/0000-0002-8597-8619)
- Colin Tucker (ORCID: https://orcid.org/0000-0003-2679-5211)
- Christine S. O’Connell (ORCID: https://orcid.org/0000-0002-5373-7933)
- Tana E. Wood (ORCID: https://orcid.org/0000-0001-6322-6224)
- M. Isabel Loza (ORCID: https://orcid.org/0000-0002-4436-4610)
Institutions
- University of Vermont (US)
- Michigan Technological University (US)
- United States Geological Survey (US)
- Chapman University (US)
- Morton Arboretum (US)
- Northern Research Station (US)
- International Institute of Tropical Forestry (PR)
- Southwest Biological Science Center
- Macalester College (US)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-09-16
- DOI
- https://doi.org/10.1038/s41467-025-62065-6
- Citations
- 2
- Primary Topic
- Plant Water Relations and Carbon Dynamics
- Type
- article
- Field-Weighted Citation Impact
- 2.21
Funders
- National Science Foundation
- U.S. Department of Energy
- U.S. Department of Agriculture
- Office of Science
- U.S. Forest Service
- Biological and Environmental Research
- International Institute of Tropical Forestry