TRI D. LELONO
Department of Fisheries and Marine Resources Utilization, Faculty of Fisheries and Marine Science, Universitas Brawijaya. Jl. Veteran, Malang 65145, East Java, Indonesia

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Mangrove condition at a marine conservation area at Moramo Bay, Sulawesi, Indonesia DEDY OETAMA; LUCHMAN HAKIM; TRI D. LELONO; MUHAMMAD MUSA
Biodiversitas Journal of Biological Diversity Vol. 24 No. 12 (2023)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d241215

Abstract

Abstract. Oetama D, Hakim L, Lelono TD, Musa M. 2023. Mangrove condition at a marine conservation area at Moramo Bay, Sulawesi, Indonesia. Biodiversitas 24: 6536-6544. The mangrove ecosystem is one ecosystem that supports biodiversity at the Marine Conservation Area (MCA) in Moramo Bay, Southeast Sulawesi, Indonesia. The area of the mangrove ecosystem in Moramo Bay is approximately 1,933.09 hectares, with an MCA of 1,281.46 hectares. This ecosystem plays an important role in protecting the coastline from erosion due to the seawater filtration process in the bay. This study aims to provide information regarding the status of mangrove ecosystem in the MCA, including species, density, basal area, dominance, and canopy cover percentage, which was used to state the standard criteria for mangrove ecosystem damage. The methods involved a 10×10 m² transect and hemispherical photography using a fisheye lens with a 180° field of view. Seven species of mangrove were found in Moramo Bay MCA, including Bruguiera gymnorrhiza (L.) Lam. (dominating with a basal area value of 136,963.66), followed by Sonneratia alba Sm. (153,111.90), Rhizophora mucronata Lam. (113,708.04), Rhizophora stylosa Griffith (28,869.95), Xylocarpus moluccensis (Lam.) M.Roem. (9,326.59), Avicennia marina (Forssk.) Vierh. (3,419.46), and Rhizophora apiculata Blume with a basal area value of 1,690.11. The density of mangrove vegetation was in the criteria of rare to dense, with approximately 800-4,200 individuals per hectare. Furthermore, the mangrove ecosystem in the MCA was found to be damaged up to good condition, with canopy cover percentage values of 45.85%-98.88%. The condition of the mangrove ecosystem in Moramo Bay MCA preserves a basic deliberation for the Indonesian government for adaptive and sustainable management of conservation areas. Protection, preservation, and utilization of mangrove ecosystems should be maximized in all coastal areas to improve the quality of biodiversity.
Health status of coral reef at Moramo Bay Marine Conservation Area, Southeast Sulawesi, Indonesia DEDY OETAMA; LUCHMAN HAKIM; TRI D. LELONO; MUHAMMAD MUSA
Biodiversitas Journal of Biological Diversity Vol. 25 No. 4 (2024)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d250413

Abstract

Abstract. Oetama D, Hakim L, Lelono TD, Musa M. 2024. Health status of coral reef at Moramo Bay Marine Conservation Area, Southeast Sulawesi, Indonesia. Biodiversitas 25: 1454-1464. Moramo Bay is one of the regional Marine Conservation Areas (MCA) in Indonesia which is categorized as a Marine Tourism Park based on the Decree of the Minister of Maritime Affairs and Fisheries of the Republic of Indonesia Number 22 of 2021. This bay is located in Southeast Sulawesi Province and has an area of 21,902.34 ha, consisting of a core zone, limited-use zone, and other zones. The ecosystems found in Moramo Bay include coral reefs, mangroves, and seagrass. The coral reef ecosystem in this area covers 2,528.19 ha with good visual conditions of the reef. The present study aims to provide detailed information concerning the condition of live hard corals and reef fishes, including abundance, diversity, evenness, dominance, and water quality by using point intercept transect (PIT) and underwater visual census (UVC) methods. The study was carried out at 7-10 meters of seawater depth in May-October 2023, focusing on both the core and limited-use zones and consisting of three study stages: field observation, data collection, and data analysis. Data collection covered identifying coral growth through literature study before performing descriptive analysis. The study revealed the percentage of live hard coral cover of 53%, referred to as a good category, and other variable percentages including dead coral (4%), dead coral with algae (9%), soft coral (4%), fleshy seaweed (1%), rubble (17%), sand (8%), silt (1% ) and sponge (2%). Furthermore, 25 families of reef fishes were found, belonging to 48 genera, 102 species, and 2,364 individuals, with an ecological index of abundance of 1.05 ind.m-2, diversity (2.86), evenness (0.83), and dominance (0.10). The coral reef health data issued by the present study implies that Moramo Bay MCA may be preserved as an alternative area for coral reef studies associated with global issues, for instance, climate changes. Protecting and increasing the sustainability of coral reefs is an absolute entity that must be considered by a local government.