Kelimpahan Gastropoda pada Habitat Lamun Berbeda di Pulau Bone Batang Sulawesi Selatan

Research about gastropods abundance on different types of seagrass habitat has been done in Bone Batang Island, South Sulawesi. The aim of this research was to compared the gastropods abundance on three different types of seagrass habitat: intertidal seagrass meadow, subtidal seagrass meadow and reef flat seagrass meadow. Research were also conducted to investigated the correlation between number of seagrass shoots and the abundance of gastropods on specific determined area. Data collected from eight stations consist of: five stations on intertidal seagrass meadow, two stations on subtidal seagrass meadow and one station on reef flat seagrass meadow. Every station were also consist of control that placed on bare sediment area where seagrass shoots were absent. Seagrass shoots density were counted using sediment PVC corer with 0.157 m in diameter and 0.25 m height. Gastropod samples were collected using tarp method with 4 x 3 m brown plastic tarp. Correlation between number of seagrass shoots and the abundance of gastropods were analyze using Pearson Product Moment Correlation Analysis. Result showed that the number of gastropods species and abundance varied among stations with the number tend to be higher on control site in most type of habitat. Correlation analysis showed there is no correlation between the number of seagrass species/shoot density with the number of gastropod species/abundance on each type of seagrass meadow habitat. It can be concluded that the presence of gastropods in most type of seagrass meadow habitat is not depend on seagrass number of species and seagrass shoots density

Penutupan Karang di Pulau Baranglompo dan Pulau Bone Batang Berdasarkan Metode Reef Check

The Research on “Coral Coverage in Baranglompo Island and Bone Batang Island Based on Reef Check Method” was conductedin April 2016. The aims of this study was to determine and to compare the condition of reefs in Baranglompo and Bone BatangIslands based on the percentage of life coral cover by using Reef Check methods. This study also aims to determine whichfactors that most affect the percentage of coral cover on each island i.e: abiotic factors (temperature, salinity and substrate inthe form of rock, rubble, sand, silt/clay); biotic factors (soft coral, recent killed coral, algae, sponges, fish and invertebratesassociate) and anthropogenic factors (garbage, ilegal fishing/bombs, stun, anchors, nets) were also investigated. Percentage oflife coral cover obtained by Line Intercept Transect (LIT) along 100 meters at a depth of 3 meters and 10 meters. The resultsshowed that the condition of coral reefs in Baranglompo was classified as moderate with an average percentage coral coverageof 42% at a depth of 3 meters and 27% at a depth of 10 meters. While the condition of coral reefs in Pulau Bone Batang wasrelatively good with average coral cover of 51% at 3 meters depth and moderate with average coral cover of 39% at 10 metersdepth. Condition of coral reefs in Bone Batang is better than Baranglompo islands. Anthropogenic impacts in the form of wasteis the most influential factor on coral cover on the island Baranglompo. Whereas fishing activities by using dinamite are thefactors that most influence on coral cover on the island of Bone Batang

Struktur Komunitas Echinodermata di Padang Lamun Pulau Tanakeke Kabupaten Takalar Sulawesi Selatan

Penelitian tentang struktur komunitas Echinodermata di padang lamun perairan desa Balangdatu, Pulau Tanakeke kabupaten Takalar Sulawesi Selatan telah dilakukan pada bulan Oktober 2016 - Pebruari 2017. Tujuan penelitian ini adalah untuk mengetahui struktur komunitas Echinodermata di padang lamun pulau Tanakeke. Pengambilan sampel dilakukan dengan metode transek kombinasi plot dengan ukuran plot 2 x 2 meter pada tiga stasiun berbeda. Analisis data mencakup penghitungan nilai kepadatan, Indeks keanekaragaman dan Indeks penyebaran. Hasil penelitian menunjukkan terdapat 11 spesies Echinodermata dari 7 suku. Kepadatan jenis tertinggi ditemukan pada Ophiocoma erinaceus yaitu 7,85 ind/m2. Indeks keanekaragaman tergolong rendah menunjukkan kondisi lingkungan yang tertekan. Nilai Indeks penyebaran yang di seluruh stasiun lebih dari satu, menunjukkan bahwa pola penyebaran individu cenderung mengelompok

Struktur Komunitas Padang Lamun di Perairan Kepulauan Waisai Kabupaten Raja Ampat Papua Barat

The research about Community structure of seagrass was conducted in the waters of Waisai, South Waigeo District, Raja Ampat, West Papua. The aim of this study was to determine the community structure of seagrass beds found in the waters of the Waisai archipelago, Raja Ampat, West Papua using quadrant transect method. Data of community structure were obtained at 3 stations that were station I in the countryside of Waisai (Post AL), station II in the Resort Waiwo (Waiwo Dive Center) and Station III in Saporkren village near residential areas. The results of this study discovered seven species of seagrass; Enhalus acoroides, Halophila decipiens, H. ovalis, Thalassia hemprichii, Cymodocea rotundata, Halodule pinifolia, Syringodium isoetifolium in all stations. Cymodocea rotundata had the highest importance value index (IV) which amounted to 79.22%, 161.15% and 134.68% in each station, respectively. While Syringodium isoetifolium had the lowest importance value index, respectively 00,00%, 6.91% and 7.80% in each station. Seagrass of Waisai waters had clumped distribution patterns. The seagrass Cymodocea rotundata is the most dominant seagrass species and influential in the community and the results of environmental parameters, pH, temperature, salinity, substrate, measured in research location are still feasible and great for the growth of seagrass

Potensi Tunikata Rhopalaea SP. sebagai Sumber Inokulum Jamur Simbion Penghasil Antimikroba

The research on the potency of tunicate Rhopalaea sp as a source of inoculum fungal symbionts that produce antimicrobial has been done. This research aimed to know the tunicate's potency as a source of inoculum fungal symbionts and to characterize isolate symbiont fungal Rhopalaea sp. Isolation of fungi was performed using a PDA medium (Potato Dextrose Agar). Characterization of isolates fungal symbiont through macroscopic and microscopic observation, and testing its activity against pathogenic bacteria and fungi. The results showed there were three isolates(Asc 1, Asc 2 dan Asc 3) of fungal symbionts Rhopalaea sp. The results of macroscopic observation colony showed that Asc 1 had a flat surface such as cotton while Asc 2 and Asc 3 had a surface such as flour; Colours of isolates : Asc 1 (yellow), Asc 2 and Asc 3 (dark green). The result of microscopic observation reveals that Asc 1 had septa, Asc 2 and Asc 3 hadn't septa; Asc 1 with blue brownish hyphae, while Asc 2 and Asc 3 hyaline (colorless); Asc 1 had asexual spores sporangiophores, while Asc 2 and Asc 3 had conidioshpore. Asc 1 isolate was suspected, belongs to the genus Penicillium and Asc 2 and Asc 3 isolates were suspected to be classified into the genus Aspergillus. All three isolates were able to inhibit the growth of Salmonella thypi bacteria and Candida albicans fungus

Makrozoobentos Yang Berasosiasi Dengan Padang Lamun Diperairan Pulau Barrang Lompo, Makassar, Sulawesi Selatan [Macrozoobenthos Association with Seagrass Beds in Barranglompo Island Waters, Makassar, South Sulawesi]

A study on community structure of macrozoobenthos was conducted in the vicinity of seagrass beds Barrang Lompo Island Waters,Makassar. The aim of this study was to investigate species composition, density of macrozoobenthos in the area.Total of 27 species macrozoobenthos were identified during this study.Modiolus micropterus is the most dominant species with density of 542 individu/m .The highest diversity index was found in southeast side (2.38) while northeast side has diversity index only 0.70. Macrozoobentos composition in both station were different with similarity index of 21%