Abstract. Coral reefs are one of the most highly productive marine ecosystems, with the largest transfer of energy attributed to the trophic interaction between herbivores and algae. Rapid demographic growth, leading to transmigration to small islands such as Natuna Island where located on outer Island Indonesia.The aim of the present study is to test for significant associations between herbivore fish species traits and Habitat complexity was derived from coral reef cover. Method to record each observed herbivore fish species with UVC (Underwater Visual Census) using SCUBA diving equipment along modification line transects. A total of 39 different fish species belonging to 3 families" herbivore fish were identified. Total biomass of herbivorous fish correlated with Dead Coral Algae (DCA). Biplot of the first two axes for the nonmetric multidimensional a scaling (NMDS) analysis for family and grazer showed the dominance of herbivore fish grazer.
Rhizopora sp has a single root. The shape of the roots, which are like anchors, is what makes mangroves a wave absorber, sediment binder, and so on. One of the functions of mangrove roots is to prevent the release of garbage into the open sea. This is due to the shape of the roots that make garbage snagged (caught) on the sidelines of the roots. The purpose of this study was to analyze the capture of marine debris in the mangrove roots of Rhizopora sp in the Sengarang Besar ecosystem. This research was conducted in December 2021 in the mangrove forest of Senggarang Besar. The method used is the line transect method with 10 Rhizopora sp mangrove trees located on the coast. Then, data analysis on the density of waste caught in the mangrove roots of Rhizopora sp. The results showed that the inorganic waste found in the mangrove roots of Rhizopora sp were plastic waste, metal waste, glass waste, rubber waste, and cloth waste. Plastic waste is the highest waste catch in the mangrove ecosystem of the Great Senggarang beach. Then the data that has been taken is analyzed using Pearson correlation to prove whether there is a relationship between the circumference and the type of garbage caught. The results of the Pearson correlation between cloth and plastic with root circumference were -0.30 and -0.04 (no correlation between the two variables); Pearson glass correlation with root circumference was 0.45 (sufficient correlation); Pearson rubber correlation with circumference is 0.71 (strong correlation). It can be concluded that there are other factors such as geographical influences, ocean currents and others in the catch of garbage at mangrove roots.
Rhizophora sp has a single root. The shape of the roots, which are like anchors, is what makes mangroves wave absorbers, sediment binder, and so on. One of the functions of mangrove roots is to prevent the release of garbage into the open sea. This is due to the shape of the roots that make garbage snagged (caught) on the sidelines of the roots. The purpose of this study was to analyze the capture of marine debris in the mangrove roots of Rhizophora sp in the Sengarang Besar ecosystem. This research was conducted in December 2021 in the mangrove forest of Senggarang Besar. The method used is the line transect method with 10 Rhizophora sp mangrove trees located on the coast. Then, data analysis on the density of waste caught in the mangrove roots of Rhizophora sp. The results showed that the inorganic waste found in the mangrove roots of Rhizophora sp were plastic waste, metal waste, glass waste, rubber waste, and cloth waste. Plastic waste is the highest waste catch in the mangrove ecosystem of the Great Senggarang beach. Then the data that has been taken is analyzed using Pearson correlation to prove whether there is a relationship between the circumference and the type of garbage caught. The results of the Pearson correlation between cloth and plastic with root circumference were -0.30 and -0.04 (no correlation between the two variables); Pearson glass correlation with root circumference was 0.45 (sufficient correlation); Pearson rubber correlation with circumference is 0.71 (strong correlation). It can be concluded that there are other factors such as geographical influences, ocean currents, and others in the catch of garbage at mangrove roots.
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