The effects of CO2 and nutrient fertilisation on the growth and temperature response of the mangrove Avicennia germinans

Reef, Ruth, Slot, Martijn, Motro, Uzi, Motro, Michal, Motro, Yoav, Adame, Maria F., Garcia, Milton, Aranda, Jorge, Lovelock, Catherine E. and Winter, Klaus (2016) The effects of CO2 and nutrient fertilisation on the growth and temperature response of the mangrove Avicennia germinans. Photosynthesis Research, 129 2: 159-170. doi:10.1007/s11120-016-0278-2


Author Reef, Ruth
Slot, Martijn
Motro, Uzi
Motro, Michal
Motro, Yoav
Adame, Maria F.
Garcia, Milton
Aranda, Jorge
Lovelock, Catherine E.
Winter, Klaus
Title The effects of CO2 and nutrient fertilisation on the growth and temperature response of the mangrove Avicennia germinans
Formatted title
The effects of CO2 and nutrient fertilisation on the growth and temperature response of the mangrove Avicennia germinans
Journal name Photosynthesis Research   Check publisher's open access policy
ISSN 1573-5079
0166-8595
Publication date 2016-08-01
Year available 2016
Sub-type Article (original research)
DOI 10.1007/s11120-016-0278-2
Open Access Status Not Open Access
Volume 129
Issue 2
Start page 159
End page 170
Total pages 12
Place of publication Dordrecht, Netherlands
Publisher Springer Netherlands
Collection year 2017
Language eng
Formatted abstract
In order to understand plant responses to both the widespread phenomenon of increased nutrient inputs to coastal zones and the concurrent rise in atmospheric CO2 concentrations, CO2–nutrient interactions need to be considered. In addition to its potential stimulating effect on photosynthesis and growth, elevated CO2 affects the temperature response of photosynthesis. The scarcity of experiments testing how elevated CO2 affects the temperature response of tropical trees hinders our ability to model future primary productivity. In a glasshouse study, we examined the effects of elevated CO2 (800 ppm) and nutrient availability on seedlings of the widespread mangrove Avicennia germinans. We assessed photosynthetic performance, the temperature response of photosynthesis, seedling growth and biomass allocation. We found large synergistic gains in both growth (42 %) and photosynthesis (115 %) when seedlings grown under elevated CO2 were supplied with elevated nutrient concentrations relative to their ambient growing conditions. Growth was significantly enhanced under elevated CO2 only under high-nutrient conditions, mainly in above-ground tissues. Under low-nutrient conditions and elevated CO2, root volume was more than double that of seedlings grown under ambient CO2 levels. Elevated CO2 significantly increased the temperature optimum for photosynthesis by ca. 4 °C. Rising CO2 concentrations are likely to have a significant positive effect on the growth rate of A. germinans over the next century, especially in areas where nutrient availability is high.
Keyword Climate change
CO2
Eutrophication
Mangrove
Nitrogen
Phosphorus
Photosynthesis
RUBISCO
Temperature response
Tropics
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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