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1 December 2008 Seasonal dynamics of CO2 exchange during primary succession of boreal mires as controlled by phenology of plants
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Abstract

Vegetation succession in mires is rather well identified using the paleoecological approach. Recently, the ecological succession concept has been extended to ecosystem functions, e.g., carbon dioxide (CO2) dynamics. Although a strong link between mire vegetation and carbon dynamics is well acknowledged, the successional changes in mire ecosystem functions have remained practically unstudied, especially under the same climatic control. To study the patterns and dynamics of CO2 exchange during mire succession, we measured CO2 exchange and vegetation dynamics over 2 growing seasons along a mire chronosequence on the land uplift coast of the Bay of Bothnia in western Finland. The study showed a decrease in photosynthesis during mire succession that was linked to compositional change in vegetation, i.e., replacement of sedge and herb dominance with the dominance of dwarf shrubs and Sphagna. Similarly, the study revealed decreased variation in gross photosynthesis (PG) and ecosystem respiration (RE) over a growing season, which resulted in lower levels of seasonal CO2 dynamics at older stages. The observed successional trend in phenology and CO2 dynamics was largely a consequence of the gradual decrease in the abundance of plant groups with efficient photosynthesis and green area production.

Nomenclature: Hämet-Ahti et al., 1998.

Mirva Leppälä, Kari Kukko-Oja, Jukka Laine, and Eeva-Stiina Tuittila "Seasonal dynamics of CO2 exchange during primary succession of boreal mires as controlled by phenology of plants," Ecoscience 15(4), (1 December 2008). https://doi.org/10.2980/15-4-3142
Received: 2 October 2007; Accepted: 1 April 2008; Published: 1 December 2008
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