Temperature acclimation of leaf respiration differs between marsh and mangrove vegetation in a coastal wetland ecotone

© 2021 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 28(2022), 2 vom: 01. Jan., Seite 612-629
1. Verfasser: Sturchio, Matthew A (VerfasserIn)
Weitere Verfasser: Chieppa, Jeff, Chapman, Samantha K, Canas, Gabriela, Aspinwall, Michael J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article Avicennia germinans Spartina alterniflora coastal wetlands coordination theory homeostasis respiratory capacity thermal acclimation
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520 |a Temperature acclimation of leaf respiration (R) is an important determinant of ecosystem responses to temperature and the magnitude of temperature-CO2 feedbacks as climate warms. Yet, the extent to which temperature acclimation of R exhibits a common pattern across different growth conditions, ecosystems, and plant functional types remains unclear. Here, we measured the short-term temperature response of R at six time points over a 10-month period in two coastal wetland species (Avicennia germinans [C3 mangrove] and Spartina alterniflora [C4 marsh grass]) growing under ambient and experimentally warmed temperatures at two sites in a marsh-mangrove ecotone. Leaf nitrogen (N) was determined on a subsample of leaves to explore potential coupling of R and N. We hypothesized that both species would reduce R at 25°C (R25 ) and the short-term temperature sensitivity of R (Q10 ) as air temperature (Tair ) increased across seasons, but the decline would be stronger in Avicennia than in Spartina. For each species, we hypothesized that seasonal temperature acclimation of R would be equivalent in plants grown under ambient and warmed temperatures, demonstrating convergent acclimation. Surprisingly, Avicennia generally increased R25 with increasing growth temperature, although the Q10 declined as seasonal temperatures increased and did so consistently across sites and treatments. Weak temperature acclimation resulted in reduced homeostasis of R in Avicennia. Spartina reduced R25 and the Q10 as seasonal temperatures increased. In Spartina, seasonal temperature acclimation was largely consistent across sites and treatments resulting in greater respiratory homeostasis. We conclude that co-occurring coastal wetland species may show contrasting patterns of respiratory temperature acclimation. Nonetheless, leaf N scaled positively with R25 in both species, highlighting the importance of leaf N in predicting respiratory capacity across a range of growth temperatures. The patterns of respiratory temperature acclimation shown here may improve the predictions of temperature controls of CO2 fluxes in coastal wetlands 
650 4 |a Journal Article 
650 4 |a Avicennia germinans 
650 4 |a Spartina alterniflora 
650 4 |a coastal wetlands 
650 4 |a coordination theory 
650 4 |a homeostasis 
650 4 |a respiratory capacity 
650 4 |a thermal acclimation 
700 1 |a Chieppa, Jeff  |e verfasserin  |4 aut 
700 1 |a Chapman, Samantha K  |e verfasserin  |4 aut 
700 1 |a Canas, Gabriela  |e verfasserin  |4 aut 
700 1 |a Aspinwall, Michael J  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Global change biology  |d 1999  |g 28(2022), 2 vom: 01. Jan., Seite 612-629  |w (DE-627)NLM098239996  |x 1365-2486  |7 nnns 
773 1 8 |g volume:28  |g year:2022  |g number:2  |g day:01  |g month:01  |g pages:612-629 
856 4 0 |u http://dx.doi.org/10.1111/gcb.15938  |3 Volltext 
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