Seaweed farming in Indonesia is carried out throughout much of the archipelago and is mainly undertaken by smallholder farmers. Indonesia is the largest global producer of the red seaweeds Kappaphycus and Eucheuma, which are used to produce carrageenan, and is a major producer of Gracilaria, which is used to produce agar. Seaweed farming is attractive to farmers in rural coastal communities because capital and operating costs are low, farming techniques are not technically demanding, labour requirements are relatively low (allowing farmers to engage in other livelihoods), and production cycles are short (30–45 days), providing regular income. Using reported values for seaweed-farming income, we conclude that seaweed farming can, but does not always, lift rural households above the Indonesian poverty line. In addition to direct financial benefits, seaweed farming also contributes to human and social capital within seaweed farming households and communities. Achieving continued economic and social benefits from seaweed farming will require additional policy development, as well as research and development to support improved and more consistent seaweed productivity and improved product quality at the farm level, provision of effective extension and technical support services, and diversification of the existing value chains in order to reduce the impacts of price fluctuations that are associated with limited global commodity chains.

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Phytoplankton can be used as indicator of waters environment quality. This research was conducted in Bauluang Island waters of Takalar Regency of South Sulawesi. The aims of this research were study the richness and stabilization of Bauluang Island waters by analysis of phytoplankton diversity and their relationship of waters quality. Plankton net no. 25 was used to phytoplankton collection then it was preserved in MAF solution. Identification of phytoplankton was conducted until species level and counting cell method was used to calculate their population density. Varies phytoplankton density at the range of 470-2,680 ind./L and species at the range of 5-20 species. Phytoplankton stabilization was moderate while phytoplankton evenness was spread. Correlation (r) of phytoplankton diversity with alkalinity and total organic matter was 0.61 respectively.

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ABSTRAKBudidaya rumput laut sangat prospektif menjadi alternatif usaha oleh masyarakat pesisir dan pulau-pulau kecil. Pemilihan lokasi budidaya melalui kegiatan inventarisasi dan pemetaan potensi sumberdaya lahan merupakan tahapan awal yang penting dilakukan. Penelitian ini bertujuan menentukan kelayakan lahan perairan untuk pengembangan budidaya rumput laut di Gusung Batua, Pulau Badi Kabupaten Pangkep. Penelitian dilakukan dengan metode survai untuk mendapatkan data primer dengan pendekatan SIG dan data sekunder. Data dianalisis dengan metode PATTERN berdasarkan skoring dari beberapa variabel kunci untuk menentukan tingkat kelayakan lahan bagi pengembangan budidaya rumput laut. Hasil penelitian menunjukkan bahwa perairan Gusung Batua di Pulau Badi memiliki potensi lahan pengembangan budidaya rumput laut dengan tingkat kelayakan tinggi seluas 42,1 ha (4,2%), tingkat kelayakan sedang 660,3 ha (66,6%), dan tingkat kelayakan rendah 156,8 ha (15,8%).