Abstract
Temperature rise due to climate change have an impact on various ecosystems, including coastal ecosystems. Temperature rise also affects plant metabolism, such as carbon uptake. Macroalgae is the dominant community in the intertidal zone, and potential to absorb carbon. A series of experiments on several dominant macroalgae species from the south coast of West Java have been done to see the effect of temperature regime on carbon content. The treatment of temperatures of 24, 27, 30, and 33 °C was carried out for 72 hours against 6 macroalgae species representing Chlorophycae, Phaeophycea and Rhodophyceae to investigate carbon content. The results showed that the macroalgae of Phaeophyceae division showed higher carbon content in comparison to the macroalgae of the other divisions. The temperature that significantly affects chloropyll was 33 oC against all the species being tested.
Highlights
The CO2 in atmosphere is significantly increasing from 280 ppm to 404,96 ppm in the past few decades, triggered by the industrial revolution (Eakin et al, 2008; NOAA, 2016)
Results of T. conoides and S. binderi showed a surge of carbon content in day 48 and 72, while the others showed a decrease
Carbon content of macroalgae showed a decrease in most species, except for T. conoides at a temperature of 30 oC and G. coronopifolia at a temperature of 24 oC
Summary
The CO2 in atmosphere is significantly increasing from 280 ppm to 404,96 ppm in the past few decades, triggered by the industrial revolution (Eakin et al, 2008; NOAA, 2016). The Green House Effect has caused global temperature rise in seawater by 0.7oC in the ocean surface (Eakin et al, 2008) and may affect the organisms, with no exception to macroalgae. Macroalgae, in a positive way, contribute in reducing CO2 production released to the atmosphere and can significantly reduce global warming (Kaladharan et al, 2009). Continuous global warming in seawater column will affect macroalgal carbon uptake. One of the consequences will lead to the lost of biodiversity
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