HUBUNGAN JENIS SUBSTRAT TERHADAP JUMLAH TEGAKAN LAMUN DI KARANG KIAMPAU KOTA BONTANG, KALIMANTAN TIMUR

The aims of this research were to know the relation type of the substrate on the number of seagrass stands and also its correlation with phyico-chemical parameters in the Karang Kiampau, Bontang City. This research was conducted in February until April 2019. The research location were  divided in 4 reaserch stasions (North, East, South,and West) using three different transect area with the 15 days interval. Data analyst used coverage and relative coverage, frequency and relative frequency, closing and relative closing, significant index score, seagrass distribution pattern and correlation. Only Enhalus acoroides and Cymodocea rotundata was found with the average 73 until 191 ind/m 2 and 411 ind/m 2 . Seagrass distribution pattern of four stations that is clumped. The result analysis substrate based on the criteria of soil chemical trait that is organic materials including from medium-high category 2.01 until 3.01%, total Nitrogen including is low category 0.10 until 0.20%. Ratio C/N from high-very high up 25%. P 2 O 5 including very low category down 10 ppm and NH 4 NO 3 including very high category up 0,75 ppm. The test result of statistical correlation between the density of seagrass and organic materials indicates that there is correlation positive with the value of (r is 94%, 82%, and 99%) and (r is 36%, 36%, and 36%). It shows that the relation type the substrate on the number of seagrass stands in the Karang Kiampau is positive and perfect.