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Cox, A.J.F. et al

A-Ci, photosynthetic capacity and dark respiration data along an elevation/temperature gradient in the Colombian Andes, 2019

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This dataset is available under the terms of the Open Government Licence

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https://doi.org/10.5285/60dd0b8f-f0c3-4e30-841b-1c2067052974
This dataset includes key photosynthesis and respiration data collected from three common garden sites along an elevation/temperature gradient in the Colombian Andes. Raw A-Ci data, the Vcmax (carboxylation of RuBP by the enzyme Rubisco) and Jmax (the regeneration of RuBP by the electron transport chain) values estimated from this data, and Rdark (leaf dark respiration) values collected using spot measurements, are all available, along with variables such as leaf temperature (°C), relative humidity (%) and pressure values (kPa) returned by the LI-6800 portable photosynthesis system.
Publication date: 2023-03-01
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More information

View numbers valid from 01 June 2023 Download numbers valid from 20 June 2024 (information prior to this was not collected)

Format

Comma-separated values (CSV)

Spatial information

Study area
Spatial representation type
Tabular (text)
Spatial reference system
WGS 84

Temporal information

Temporal extent
2019-01-01    to    2019-12-31

Provenance & quality

The raw A-Ci data was collected using a LI-6800 portable photosynthesis system. Once clamped onto a leaf, conditions inside the cuvette were standardised to 29ᵒC, 65% relative humidity and 410ppm CO2; once stable at gs ≥0.05 mol m-2 s-1, net photosynthesis was measured sequentially at 8 different ambient CO2 concentrations (Ca; 410, 300, 175, 60, 410, 800, 1500, 2000) corresponding to different intercellular Ci concentrations. Light intensity was set to a pre-determined saturating photon flux density (PPFD) for each species, according to A-Q curves collected prior to the A-Ci curves.
Vcmax and Jmax values were estimated by inputting the raw A-Ci data into the ‘plantecophys’ package (Duursma, 2015) in the R environment (v4.2.1; R Core Team, 2022). Once these had been extracted, values were standardised to both 25°C and site growth temperature (Tg) using temperature response values derived from Kumarathunge et al. (2019) and the equation given in the supporting documentation.
Rdark values were also standardised to 25°C and Tg using an exponential fixed Q10 equation (Tjoelker et al. 2001) and including the temperature-dependence of Q10; both equations are given in the supporting documentation.

Licensing and constraints

This dataset is available under the terms of the Open Government Licence

Cite this dataset as:
Cox, A.J.F.; Hartley, I.P.; Meir, P.; Sitch, S. ; Dusenge, M.E. ; Restrepo, Z. ; González-Caro, S.; Villegas, J.C. ; Uddling, J.; Mercado, L.M. (2023). A-Ci, photosynthetic capacity and dark respiration data along an elevation/temperature gradient in the Colombian Andes, 2019. NERC EDS Environmental Information Data Centre. https://doi.org/10.5285/60dd0b8f-f0c3-4e30-841b-1c2067052974

Correspondence/contact details

Mercado, L.M.
University of Exeter
 L.Mercado@exeter.ac.uk

Authors

Cox, A.J.F.
University of Exeter
Hartley, I.P.
University of Exeter
Meir, P.
University of Edinburgh
Sitch, S.
University of Exeter
Dusenge, M.E.
University of Western Ontario
Restrepo, Z.
Universidad de Antioquia
González-Caro, S.
University of Exeter
Villegas, J.C.
Universidad de Antioquia
Uddling, J.
University of Gothenburg
Mercado, L.M.
University of Exeter

Other contacts

Rights holder
University of Exeter
Custodian
NERC EDS Environmental Information Data Centre
 info@eidc.ac.uk
Publisher
NERC EDS Environmental Information Data Centre
 info@eidc.ac.uk

Additional metadata

Topic categories
biota
Keywords
acclimation , Andean Montane Forests , Colombian Andes , Jmax , photosynthesis , Rdark , respiration , Vcmax
Funding
Natural Environment Research Council Award: NE/R001928/1
Last updated
04 March 2024 17:30