Boreal conifers maintain carbon uptake with warming despite failure to track optimal temperatures.
In: Nature communications, Jg. 14 (2023-08-03), Heft 1, S. 4667
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Zugriff:
Warming shifts the thermal optimum of net photosynthesis (T optA ) to higher temperatures. However, our knowledge of this shift is mainly derived from seedlings grown in greenhouses under ambient atmospheric carbon dioxide (CO 2 ) conditions. It is unclear whether shifts in T optA of field-grown trees will keep pace with the temperatures predicted for the 21 st century under elevated atmospheric CO 2 concentrations. Here, using a whole-ecosystem warming controlled experiment under either ambient or elevated CO 2 levels, we show that T optA of mature boreal conifers increased with warming. However, shifts in T optA did not keep pace with warming as T optA only increased by 0.26-0.35 °C per 1 °C of warming. Net photosynthetic rates estimated at the mean growth temperature increased with warming in elevated CO 2 spruce, while remaining constant in ambient CO 2 spruce and in both ambient CO 2 and elevated CO 2 tamarack with warming. Although shifts in T optA of these two species are insufficient to keep pace with warming, these boreal conifers can thermally acclimate photosynthesis to maintain carbon uptake in future air temperatures.
(© 2023. Springer Nature Limited.)
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Boreal conifers maintain carbon uptake with warming despite failure to track optimal temperatures.
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Autor/in / Beteiligte Person: | Dusenge, ME ; Warren, JM ; Reich, PB ; Ward, EJ ; Murphy, BK ; Stefanski, A ; Bermudez, R ; Cruz, M ; McLennan, DA ; King, AW ; Montgomery, RA ; Hanson, PJ ; Way, DA |
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Zeitschrift: | Nature communications, Jg. 14 (2023-08-03), Heft 1, S. 4667 |
Veröffentlichung: | [London] : Nature Pub. Group, 2023 |
Medientyp: | academicJournal |
ISSN: | 2041-1723 (electronic) |
DOI: | 10.1038/s41467-023-40248-3 |
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