Carbon balance under a changing light environment
- Deregibus, Dolores
- Zacher, Katharina
- Bartsch, Inka
- Campana, Gabriela Laura
- Momo, Fernando Roberto
- Wiencke, Christian
- Gómez, Iván
- Quartino, Maria Liliana
DOIAbstract
The natural environment of Antarctic seaweeds is characterized by changing seasonal light conditions. The ability to adapt to this light regime is one of the most important prerequisites for their ecological success. Thus, the persistence of seaweeds depends on their capacity to maintain a positive carbon balance (CB) for buildup of biomass over the course of the year. A positive CB in Antarctica occurs only during the ice-free period in spring and summer, when photosynthetically active radiation (PAR, 400–700 nm) penetrates deeply into the water column. The accumulated carbon compounds during this period are stored and remobilized to support metabolism for the rest of the year. Over the last decades climate warming has induced a severe gla...
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