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Pàgina inicial > Articles > Articles publicats > Long-term warming increased carbon sequestration capacity in a humid subtropical forest |
Data: | 2024 |
Resum: | Tropical and subtropical forests play a crucial role in global carbon (C) pools, and their responses to warming can significantly impact C-climate feedback and predictions of future global warming. Despite earth system models projecting reductions in land C storage with warming, the magnitude of this response varies greatly between models, particularly in tropical and subtropical regions. Here, we conducted a field ecosystem-level warming experiment in a subtropical forest in southern China, by translocating mesocosms (ecosystem composed of soils and plants) across 600 m elevation gradients with temperature gradients of 2. 1°C (moderate warming), to explore the response of ecosystem C dynamics of the subtropical forest to continuous 6-year warming. Compared with the control, the ecosystem C stock decreased by 3. 8% under the first year of 2. 1°C warming; but increased by 13. 4% by the sixth year of 2. 1°C warming. The increased ecosystem C stock by the sixth year of warming was mainly attributed to a combination of sustained increased plant C stock due to the maintenance of a high plant growth rate and unchanged soil C stock. The unchanged soil C stock was driven by compensating and offsetting thermal adaptation of soil microorganisms (unresponsive soil respiration and enzyme activity, and more stable microbial community), increased plant C input, and inhibitory C loss (decreased C leaching and inhibited temperature sensitivity of soil respiration) from soil drying. These results suggest that the humid subtropical forest C pool would not necessarily diminish consistently under future long-term warming. We highlight that differential and asynchronous responses of plant and soil C processes over relatively long-term periods should be considered when predicting the effects of climate warming on ecosystem C dynamics of subtropical forests. |
Ajuts: | Ministerio de Ciencia e Innovación TED2021-132627B-I00 Ministerio de Ciencia e Innovación PID2022-140808NB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-1333 |
Nota: | Altres ajuts: Fundación Ramón Areces Grant CIVP20A6621 |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Publicat a: | Global change biology, Vol. 30, Issue 1 (January 2024) , art. e17072, ISSN 1365-2486 |
Disponible a partir de: 2025-01-31 Postprint |