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June 18, 2025
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Modelling Net CO2 Assimilation of Two Sphagnum Species From Temperature and Water Content Response

Publicated to:Physiologia Plantarum. 177 (3): - 2025-06-13 177(3), DOI: 10.1111/ppl.70325

Authors: Perera-Castro, A. V., & Nadal, M.

Affiliations

AgroParisTech, INRAE, UMR Silva Université de Lorraine Nancy France, Departamento de Sistemas Agrícolas, Forestales y Medio Ambiente Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA) Zaragoza Spain - Author
Department of Botany, Ecology and Plant Physiology Universidad de La Laguna La Laguna Canary Islands Spain, Institute of Biology University of Hohenheim Stuttgart Germany - Author

Abstract

Photosynthesis and respiration respond differently to the combined effects of temperature and water status. Quantifying their responses is crucial to predict the carbon balance of Sphagnum peatlands in different scenarios of climate change. A first approach was done for two Sphagnum species inhabiting a boreal peatland in Finland. Gas exchange at different temperatures and moss hydration were measured to model net assimilation using simultaneous measurements of photosynthesis and dark respiration. In addition, measurements of moss surface temperature at different water content were performed in the field, covering natural conditions of sun exposure and air temperature. We also accounted for the interaction effect between moss canopy temperature and air temperature, radiation, and water content. Our model accurately predicted net assimilation and was used to estimate net primary productivity based on meteorological inputs and moss water content. The two Sphagnum species presented optimum temperatures for net CO2 assimilation around 25°C, with minimum changes at other temperatures. In contrast, dark respiration increased exponentially with temperature, which makes losses of carbon during the night and the duration of dark conditions key determinants in the carbon balance of Sphagnum. The modeled net primary productivity revealed an enhancement of CO2 fixation under warming conditions (averaged +10°C), concomitant to the expected transformation of peatlands from sink to source of CO2. Our model highlighted the importance of respiration restriction in ensuring positive assimilation in Sphagnum. Therefore, day and night temperature oscillation and short night photoperiods are more important than the optimum temperature of photosynthesis for carbon balance.

Keywords

Cambio climáticoFotosíntesisProductividad primaria netaSphagnumTurba

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Physiologia Plantarum due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2025, it was in position 58/273, thus managing to position itself as a Q1 (Primer Cuartil), in the category Plant Sciences.

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-07-21:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 1.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 1 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 0.5.
  • The number of mentions on the social network X (formerly Twitter): 1 (Altmetric).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is: