Drini Beach is one of beaches in Gunungkidul, D.I. Yogyakarta with dead-coral reefs as the landform. Dead-coral reef is a good habitat for macroalgae. Based on the pigment content, the macroalgae are divided into Chlorophyta, Phaeophyta, and Rhodophyta with their specific pigments chlorophyta, carotenoid and phycobiliprotein, respectively. These pigments are potentially used as a marker for identification and classification. The research aimed to identify and quantify pigments content of macroalgae in Drini Beach, Gunungkidul, DIY. Samples collection was done in June, 2013. Pigment extractions were done for polar and nonpolar pigments and then the extracts were analyzed using spectrophotometry UV-VIS Shimadzu Genesys
10. The result showed that nonpolar extraction of Chaetomorpha had a maximum absorption peak between 320-380, 400-500, and 670 nm ; Borgesenia has maximum peak of 340, 440, and 670 nm; Cladophora in wavelenght of 340, 415, 435, 470, and 665 nm ; and Dictyosphaeria in wavelenght between 330-370, 415, 435, 470, and 665 nm of macroalgae samples; Padina in wavelenght of 340, 380, 440, 665 ; Gelidiella between 305-345 nm ; Gracilaria in wavelenght 330 nm ; Laurencia in wavelength between 310-340, 500, 550, 625, and 680 nm ; and Amphiroa in wavelenght 330 dan 400 nm. Besides, polar extraction using distilled water of Rhodhophyta showed maximum absorption peak of genus Gelidiella between 330-340, 410, and 665 nm; Gracilaria between 330-345, 410, 565, 665 nm ; Laurencia between 330-345, 435, and 665 nm ; and Amphiroa in wavelenght 335, 415, and 665 nm. Based on the results, it could be concluded that Chlorophyta has chlorophyll a, b and carotenoid; Phaeophyta has chlorophyll a, b, and, c; and Rhodophyta has chlorophyll a, carotenoid, and phycoeritrine.
Keywords :, macroalgae, Gunung Kidul, pigment, spectrophotometry