Article ; Online: Long‐term drought effects on the thermal sensitivity of Amazon forest trees
Plant, Cell & Environment. 2023 Jan., v. 46, no. 1 p.185-198
2023
Abstract: The continued functioning of tropical forests under climate change depends on their resilience to drought and heat. However, there is little understanding of how tropical forests will respond to combinations of these stresses, and no field studies to ... ...
Abstract | The continued functioning of tropical forests under climate change depends on their resilience to drought and heat. However, there is little understanding of how tropical forests will respond to combinations of these stresses, and no field studies to date have explicitly evaluated whether sustained drought alters sensitivity to temperature. We measured the temperature response of net photosynthesis, foliar respiration and the maximum quantum efficiency of photosystem II (Fᵥ/Fₘ) of eight hyper‐dominant Amazonian tree species at the world's longest‐running tropical forest drought experiment, to investigate the effect of drought on forest thermal sensitivity. Despite a 0.6°C–2°C increase in canopy air temperatures following long‐term drought, no change in overall thermal sensitivity of net photosynthesis or respiration was observed. However, photosystem II tolerance to extreme‐heat damage (T₅₀) was reduced from 50.0 ± 0.3°C to 48.5 ± 0.3°C under drought. Our results suggest that long‐term reductions in precipitation, as projected across much of Amazonia by climate models, are unlikely to greatly alter the response of tropical forests to rising mean temperatures but may increase the risk of leaf thermal damage during heatwaves. |
---|---|
Keywords | air ; canopy ; climate ; climate change ; drought ; environment ; heat ; leaves ; photosynthesis ; risk ; temperature ; trees ; tropical forests ; Amazonia |
Language | English |
Dates of publication | 2023-01 |
Size | p. 185-198. |
Publishing place | John Wiley & Sons, Ltd |
Document type | Article ; Online |
Note | JOURNAL ARTICLE |
ZDB-ID | 391893-2 |
ISSN | 1365-3040 ; 0140-7791 |
ISSN (online) | 1365-3040 |
ISSN | 0140-7791 |
DOI | 10.1111/pce.14465 |
Database | NAL-Catalogue (AGRICOLA) |
More links
Kategorien
In stock of ZB MED Bonn / Germany
Z 80/729: Show issues |
Order via subito
This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.
Inter-library loan at ZB MED
Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.