<![CDATA[The increasing concentration of carbon dioxide (CO₂) as the main greenhouse gas encourages the need for climate change mitigation efforts, one of which is through the farming of seaweed that has the potential to absorb carbon. This study aimed to analyze carbon absorption in Kappaphycus alvarezii and Kappaphycus striatum farmed with different methods in Kupang Bay waters, including Tablolong, Kuanheum, Tesabela, and Pasir Panjang. The study used a survey method through observation, measurement, and laboratory analysis. Samples were taken from farming using Longline, Off-bottom, and Anaconda net methods, at the base, middle, and tip of the thallus representing different ages. Analysis included were biomass, carbon content, standing stock, production-biomass ratio (P/B), estimation of total carbon absorption, and measurement of water quality parameters. The results showed that seaweed biomass ranged from 45.70–51.05 g, with the highest biomass obtained from the Anaconda net method and the K. alvarezii species. Carbon content ranged from 10.46–22.44%, with the highest values found in Tablolong, farmed using the Anaconda net method. Although K. alvarezii produced the highest biomass, K. striatum had higher carbon content and total carbon uptake. These results indicated that differences in species and farming methods influenced the carbon uptake capacity of seaweed, thus providing a basis for developing farming that supports climate change mitigation.]]>
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