Partial asynchrony of coniferous forest carbon sources and sinks at the intra-annual time scale

Silvestro, R and Mencuccini, M and García-Valdés, R and Antonucci, S and Arzac, A and Biondi, F and Buttò, V and Camarero, JJ and Campelo, F and Cochard, H and �ufar, K and Cuny, HE and de Luis, M and Deslauriers, A and Drolet, G and Fonti, MV and Fonti, P and Giovannelli, A and Gri�ar, J and Gruber, A and Gryc, V and Guerrieri, R and Güney, A and Guo, X and Huang, J-G and Jyske, T and Kašpar, J and Kirdyanov, AV and Klein, T and Lemay, A and Li, X and Liang, E and Lintunen, A and Liu, F and Lombardi, F and Ma, Q and Mäkinen, H and Malik, RA and Martinez del Castillo, E and Martinez-Vilalta, J and Mayr, S and Morin, H and Nabais, C and Nöjd, P and Oberhuber, W and Olano, JM and Ouimette, AP and Paljakka, TVS and Peltoniemi, M and Peters, RL and Ren, P and Prislan, P and Rathgeber, CBK and Sala, A and Saracino, A and Saulino, L and Schiestl-Aalto, P and Shishov, VV and Stokes, A and Sukumar, R and Sylvain, J-D and Tognetti, R and Treml, V and Urban, J and Vavr�ík, H and Vieira, J and von Arx, G and Wang, Y and Yang, B and Zeng, Q and Zhang, S and Ziaco, E and Rossi, S (2024) Partial asynchrony of coniferous forest carbon sources and sinks at the intra-annual time scale. In: Nature Communications, 15; 1. (6169).

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Abstract

As major terrestrial carbon sinks, forests play an important role in mitigating climate change. The relationship between the seasonal uptake of carbon and its allocation to woody biomass remains poorly understood, leaving a significant gap in our capacity to predict carbon sequestration by forests. Here, we compare the intra-annual dynamics of carbon fluxes and wood formation across the Northern hemisphere, from carbon assimilation and the formation of non-structural carbon compounds to their incorporation in woody tissues. We show temporally coupled seasonal peaks of carbon assimilation (GPP) and wood cell differentiation, while the two processes are substantially decoupled during off-peak periods. Peaks of cambial activity occur substantially earlier compared to GPP, suggesting the buffer role of non-structural carbohydrates between the processes of carbon assimilation and allocation to wood. Our findings suggest that high-resolution seasonal data of ecosystem carbon fluxes, wood formation and the associated physiological processes may reduce uncertainties in carbon source-sink relationships at different spatial scales, from stand to ecosystem levels. © The Author(s) 2024.

Item Type:	Journal Article
Publication:	Nature Communications
Publisher:	Nature Research
Additional Information:	The copyright for this article belongs to the authors.
Keywords:	buffer; carbohydrate; carbon, annual variation; biomass; carbohydrate; carbon sequestration; carbon sink; cell; coniferous forest; Northern Hemisphere; primary production; source-sink dynamics, Article; biome; bivariate analysis; carbon allocation; carbon fixation; carbon sink; carbon source; cell differentiation; cell enlargement; cell wall; climate change; community dynamics; controlled study; flux assay; nonhuman; Northern Hemisphere; phenology; predictor variable; random forest; seasonal variation; sequence analysis; taiga; time factor; variance; wood; biomass; carbon cycle; carbon sequestration; chemistry; climate change; ecosystem; forest; metabolism; season; tree; vascular plant; wood, Biomass; Carbon; Carbon Cycle; Carbon Sequestration; Climate Change; Ecosystem; Forests; Seasons; Tracheophyta; Trees; Wood
Department/Centre:	Division of Biological Sciences > Centre for Ecological Sciences
Date Deposited:	09 Sep 2024 11:21
Last Modified:	09 Sep 2024 11:21
URI:	http://eprints.iisc.ac.in/id/eprint/85996

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