Studi Komparatif Tutupan Living dan Non Living Substrat Dasar Perairan Pulau Sempu Kabupaten Malang Menggunakan Metode Reef Check

Abstract

Abstrak Penelitian ini dilaksanakan guna mensurvei substrat di perairan Sempu Kabupaten Malang menggunakan metode reefcheck (PIT: Point Intercept Transect). Substrat perairan dapat dibagi menjadi dua macam, antaralain living/substrat hidup (HC = Hard Coral/karang keras, SC = Soft Coral/karang lunak, NIA = Nutrient Indicator Algae/ alga, SP = Sponge/ spons, OT = Other/ organisme living lainnya) dan non living/ substrat tak hidup (RC = Rock/ batu, RKC = Recently Killed Coral/ karang yang baru mati, RB = Rubble/ Pecahan Karang, SI = Silt/ lumpur, SD = Sand/ pasir. Data penelitian diolah menggunakan perhitungan presentase tutupan karang pada setiap stasiun penelitian. Presentase tutupan karang stasiun Teluk Semut 1 menurun dari tahun 2016 ke 2018 sebesar 22.75% dan didominasi oleh substrat batu (52%). Stasiun Teluk Semut 2 yang didominasi oleh substrat karang keras mengalami kenaikan presentase tutupan karang di tahun 2017 (42.37%) dan menurun di tahun 2018 sebesar 41%. Stasiun Waru-waru memiliki presentase tutupan karang 30% dan didominasi oleh substrat pasir(44%). Stasiun Watu Meja yang di dominasi oleh substrat pasir(53%) mengalami kenaikan presentase tutupan karang di tahun 2017 (25.5%) dan menurun sebesar 45% di tahun 2018. Presentase tutupan karang dapat dipengaruhi oleh faktor alamiah maupun non alamiah, bahkan keterkaitan aktivitas antara substrat living dan non living di perairan Sempu dalam selang waktu dua tahun. Abstract This research was conducted to survey the substrate in Sempu waters, Malang Regency using a reefcheck method (PIT: Point Intercept Transect). Water substrate can be divided into two types, including living/ living substrate (HC = Hard Coral/ hard coral, SC = Soft Coral / soft coral, NIA = Nutrient Indicator Algae/ algae, SP = Sponge/ sponge, OT = Other/ living organisms other) and non living/ non-living substrate (RC = Rock/ rock, Recently Killed Coral RKC, RB = Rubble, SI = Silt/ mud, SD = Sand/ sand. Research data is processed using calculation of coral cover percentage at each research station The percentage of coral cover at Teluk Semut 1 station decreased from 2016 to 2018 by 22.75% and was dominated by stone substrate (52%) Teluk Semut 2 station dominated by hard coral substrate experienced an increase in coral cover percentage in 2017 (42.37%) and decreased in 2018 by 41%, Waru-waru Station had a 30% coral cover percentage and was dominated by sand substrate (44%). Watu Station Table dominated by sand substrate (53%) experienced increase in press entase of coral cover in 2017 (25.5%) and decreases by 45% in 2018. Many factors affect the condition of coral cover percentage both naturally and non-naturally, even the linkages of activities between living and non living substrates in Sempu waters within two intervals year.