Net uptake of atmospheric CO2 by coastal submerged aquatic vegetation
| Autor: | Tomohiro Kuwae, Shinya Hosokawa, Eiichi Miyoshi, Kenta Watanabe, Tatsuki Tokoro, Hajime Kayanne, Shigeru Montani, Kazufumi Tada |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Climate Change
Eddy covariance Atmospheric sciences Carbon cycle Carbon Cycle Blue carbon chemistry.chemical_compound air–water CO2 flux Japan blue carbon Dissolved organic carbon Environmental Chemistry Ecosystem carbon cycles General Environmental Science Hydrology Global and Planetary Change Alismatales Ecology biology Geography net ecosystem production Carbon Dioxide biology.organism_classification Primary Research Articles Seagrass Climate change mitigation chemistry Carbon dioxide Seasons seagrasses |
| Zdroj: | Global Change Biology |
| ISSN: | 1365-2486 1354-1013 |
| Popis: | ‘Blue Carbon’, which is carbon captured by marine living organisms, has recently been highlighted as a new option for climate change mitigation initiatives. In particular, coastal ecosystems have been recognized as significant carbon stocks because of their high burial rates and long-term sequestration of carbon. However, the direct contribution of Blue Carbon to the uptake of atmospheric CO2 through air-sea gas exchange remains unclear. We performed in situ measurements of carbon flows, including air-sea CO2 fluxes, dissolved inorganic carbon changes, net ecosystem production, and carbon burial rates in the boreal (Furen), temperate (Kurihama), and subtropical (Fukido) seagrass meadows of Japan from 2010 to 2013. In particular, the air-sea CO2 flux was measured using three methods: the bulk formula method, the floating chamber method, and the eddy covariance method. Our empirical results show that submerged autotrophic vegetation in shallow coastal waters can be functionally a sink for atmospheric CO2. This finding is contrary to the conventional perception that most near-shore ecosystems are sources of atmospheric CO2. The key factor determining whether or not coastal ecosystems directly decrease the concentration of atmospheric CO2 may be net ecosystem production. This study thus identifies a new ecosystem function of coastal vegetated systems; they are direct sinks of atmospheric CO2. |
| Databáze: | OpenAIRE |
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