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I Gusti Sila Dharma
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Earth & Planetary Sciences

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Struktur Komunitas Dan Preferensi Habitat Makrozoobentos Pada Kondisi Padang Lamun Yang Berbeda Di Kawasan Pantai Sanur Bali Ketut Popi Anjani Devi; I Gusti Sila Dharma; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (550.175 KB) | DOI: 10.24843/JMRT.2019.v02.i02.p05

Abstract

The existence of macrozoobenthos in habitats is strongly influenced by physical and chemical conditions of water. One of the macrozoobenthos habitats is seagrass, the amount of seagrass cover and organic matter greatly influences the structure of the macrozoobenthos community. Seagrass in the Sanur Beach area grows on an 8 km stretch of beach stretching from Grand Bali Beach Hotel to Mertasari. In the Sanur Beach area, a lot of research refers to the association of macrozoobenthos in seagrasses and a description of the distribution of mollusca. This study aims to determine the macrozoobenthos community structure. This research was conducted in the Sanur beach area, namely at Segara Ayu Beach and Semawang Beach. In this study macrozoobenthos data collection was carried out by substrate retrieval, and aquatic environmental parameters. The highest species composition at the two stations came from the Cycloneritida sequence, the individual abundance at Segara Ayu beach was higher than Semawang Beach which was 0.024 ind/m3, this was thought to be due to higher seagrass density at Segara Ayu Beach than at Semawang Beach. Diversity index in both stations was classified as medium, high uniformity index, and low dominance index.
Struktur Komunitas dan Sebaran Bulu Babi (Echinoidea) di Kawasan Padang Lamun Pantai Serangan, Bali I Gede Panji Agung Purnomo; I Gusti Sila Dharma; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (553.421 KB) | DOI: 10.24843/JMRT.2019.v02.i02.p06

Abstract

Sea urchin is one of the biota that inhabiting coral reef and seagrass ecosystems. This spesies is commontly found in hard substrate, especially the substrate in seagrass beds which is a mixture of sand and coral fragments (Aziz, 1994). Sea urchins can be used as indicator organisms for water quality because sea urchins will become one of the first organisms to show signs of pressure (Yulianto, 2010). Serangan Island, geographically located in South Denpasar Subdistrict, Denpasar City, Bali Province which has a sediment in the form of coarse white sand mixed with coral fragments with high water activity. Based on the results of a study on the eastern coast of Serangan, sea urchins consisting of 5 species : D. setosum, E. diadema, E. calamaris, E. mattei, D. palmeri with dominanance species found is D. setosum sea urchins. Densities of sea urchins found in all stations was dominated by D. setosum with a total value sea urchin of 4.3 ind / m2 while the lowest density was in sea urchins of E. calamaris and E. diadema with a total value of 2.5 ind / m2 . Distribution pattern of sea urchins in Pantai Serangan, has a uniform distribution pattern (v < m) and clumped (v > m). D. setosum and E. matthei have uniform distribution with values of 0.29 and 0.21 while E. diadema, E. calamaris and D. palmeri have clustered distribution.
Co-Authors I Gede Panji Agung Purnomo Ketut Popi Anjani Devi Putra, I Nyoman Giri