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Journal of Marine Research and Technology

JMRT
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Published by Universitas Udayana

ISSN : 26210088 EISSN : 26210096 DOI : 10.24843/JMRT

Core Subject : Science,

Earth & Planetary Sciences

The Journal of Marine Research and Technology (JMRT) (p-ISSN 2621-0088 | e-ISSN 2621-0096) is an open access, scientific journal that aims to publish the dynamic of the coastal and ocean, its ecosystems and coastal environment, and Observation technology. JMRT is a peer-reviewed journal publishes original articles and critical reviews of current issues in marine science and technology. The range of topics extends from research in Oceanography, marine habitats, living resources, management and conservation issues related to the marine resources. This includes remote sensing, ocean modelling, geographic information System (GIS), coastal engineering, coastal processes, marine instrument, ecology, genetics, marine pollution, fisheries, marine ecotourism, and it's economic and social. JMRT provides a forum for the discussion and sharing all the latest issues in marine research and technology. Editorial manager system is an online manuscript submission, review and tracking system. JMRT is issued twice a year, each February and August.

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Articles 5 Documents

Search results for , issue "Vol 1 No 1 (2018): AGUSTUS 2018" : 5 Documents clear

KONDISI STOMATA DAN MORFOLOGI DAUN Rhizophora apiculata PADA KAWASAN INDUSTRI PERMINYAKAN DAN NON KAWASAN INDUSTRI DI PROVINSI RIAU Syahrial Rial
Journal of Marine Research and Technology Vol 1 No 1 (2018): AGUSTUS 2018
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Oil spills often occur in the sea and are fatal to the mangrove ecosystems that exist on the coast. One of the effects is the occurrence of defoliation or leaf fall, where mangrove leaves yellowish, then wither and fall to the substrate. The study of stomatal and morphological conditions of Rhizophora apiculata leaves in petroleum industrial estate and the non-industrial area in Riau Province has been conducted in November – December 2014 with the aim to know the impact of oil industry development on stomata density, stomata area, and leaf surface area. Leaf samples were taken from 4 (four) different areas, namely Crude Palm Oil (CPO) oil industry, petroleum industry area, the joint industrial zone between petroleum and CPO and no area at all of its industrial estate. The leaf sampling was carried out using a line transect drawn from the reference point (the outer mangrove stand) with the direction perpendicular to the coastline to the mainland and made sample plots according to the level of the stand. Then each strand of the selected population, each taken 3 leaves and preserved with 70% alcohol. The results showed that in the oil industry, stomatal density, stomata area, and leaf area is higher when compared with non-industrial areas. Then the relationship of stomatal density with salinity, pH and redox shows that the higher the parameter, the higher the density of the stomata. So is the relationship between stomata area with pH and redox, the higher the parameter, the higher the stomata area. Keywords: leaf morphology, Rhizophora apiculata, petroleum industry, non-industrial area mangrove, Riau Province

DISTRIBUSI SPASIAL GASTROPODA Littoraria scabra DI HUTAN MANGROVE PULAU TUNDA SERANG BANTEN, INDONESIA Syahrial Rial; Nanang Karsim
Journal of Marine Research and Technology Vol 1 No 1 (2018): AGUSTUS 2018
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Gastropods is the most dominant molusc group in the mangrove forest. The Spatial Distribution Study of Gastropoda Littoraria scabra in the Mangrove Forest of Serang Banten Island has been conducted in January 2014. It aims to provide information on the spread of Indonesian biodiversity especially L. scabra. Data collection of L. scabra gastropods is done by making line transects and plots drawn from the reference point (the outer mangrove stand) and perpendicular to the coastline to the mainland. The line transect is made of plots with size 10 X 10 m and in the size of 10 x 10 m, a small plot of 1 x 1 m of 5 plots is created. The results showed that L. scabra gastropod was distributed evenly in the mangrove forest of Pulau Tunda Serang Banten. Then the composition and density are higher in the East (284 individu and 6.31 ind/m2) than in the South (101 individu and 2.24 ind/m2). In addition, the results also showed that the distribution pattern of L. scabra gastropod in the mangrove forest of Tunda Serang Banten Island was uniform (I? <1), indicated that L. scabra gastropod disperse evenly in it’s mangrove forest. Keywords: distribution, gastropod, Littoraria scabra, mangrove, Tunda Island, Indonesia

Pemodelan Distribusi Nitrat di Kawasan Perairan Teluk Benoa I Made Dharma Raharja; I Gede Hendrawan; Yulianto Suteja
Journal of Marine Research and Technology Vol 1 No 1 (2018): AGUSTUS 2018
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Benoa Bay is a highly regarded area by environmental conditions. Nitrate is important parameter for marine biota life. From previous research on nitrate contamination in Benoa Bay, the nitrate concentration has reached the standard condition of Bali Governor Regulation No. 16 of 2016 on Environmental Living Standard Quality and Living Standard Damage of 0,008 mg/L. Analysis previous researc still limited for surface water, so it is important to do more reasearch in water cloum of Benoa Bay. Research for nitrat constration can do whith observation data but the data observation need long time and many money. In this study using numerical modeling. The numerical modeler in this study is Finite Volume Coastal Ocean Model (FVCOM) which is modeled in 3-D. In the analysis of nitrate distribution in this study used the moemntum equations and advection-diffusion equations. From the model results for each condition the nitrate concentration at the surface of the Bay of Benoa is high in the western part of Benoa Bay and east of Benoa Bay. While in the water column of Benoa Bay the nitrate concentration tends to be influenced by the tidal elevation. The concentration nitrate is high in the low tide and the consectration nitrate is low in the high tide. The nitrate concentration from the surface to the bottom of the water have similar consentration.

Estimasi Persentase Karbon Organik pada Tanah di Hutan Mangrove Alami, Perancak, Jembrana, Bali IGA Ayu Mirah Indraiswari; I Dewa Nyoman Nurweda Putra
Journal of Marine Research and Technology Vol 1 No 1 (2018): AGUSTUS 2018
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Mangrove is one of the coastal ecosystems that play a role in taking and storing a number of carbon known as Coastal Blue Carbon. Soil storage (below-ground) in mangrove forests has a potential potential of 50% to 90% more than the total carbon stock of the ecosystem. This study was conducted at 3 stations in Perancak Mangrove Forest, Jembrana, Bali with the aim of estimating the percentage of organic carbon and knowing the vertical variation percentage of organic carbon in the soil. Sampling time was conducted in June 2015. The data required to calculate the percentage of organic carbon in the soil is the depth of soil samples, depth and sub-sample intervals, and bulk density. From the results of the study found that the percentage of organic carbon in the soil in the natural mangrove forest Perancak by 50.235% or 185.968 Mg / ha. Vertically the percentage of organic carbon in soils in natural mangrove forests Perancak varies. The lowest bulk density value at depth (0-15 cm) of 0.07 g / cm3 at station 1 and highest at depth (> 100 cm) of 0.20 g / cm 3 at station 3; value of the lowest organic carbon% at depth (> 100 cm) of 47.899% at station 2 and highest at depth (50-100 cm) of 51.821% at station 1; the lowest soil C value at depth (0-15 cm) is 17,361 Mg ha-1 and the highest at depth (50-100 cm) is 62,962 Mg ha-1 at station 1.

Preferensi Preferensi Pemangsaan Drupella sp. pada Jenis Karang yang Berbeda di Perairan Pemuteran, Bali Ni Wayan Gita Kanela; IGN Putra Dirgayusa; Widiastuti Karim
Journal of Marine Research and Technology Vol 1 No 1 (2018): AGUSTUS 2018
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Coral reefs are experiencing dynamic changes over time that are strongly influenced by environmental conditions and human activities. One of the natural damage to coral reefs is corallivorous gastropods such as Drupella sp. The marine tourism of Pemuteran waters on northern part of Bali is rapidly developing. However the Bio-Rock Center reported that there were 2.374 individuals of Drupella sp. found during 2008-2009 in this water. Therefore, this study aimed to determine the densities of Drupella sp. and prey preferences of Drupella sp. on coral species in Pemuteran waters. There were 4 observation sites that parallel to the shoreline at similar depths (5-6 m). The densities of Drupella sp. and prey preference were measured 2 x 20 m belt transect by using SCUBA. Live coral covers were counted in LIT (Line Intercept Transect) method. The significant difference of Drupella sp. densities among sites was analysed by using one way ANOVA, while the prey preference among corals species was identified by using Bonferroni test. The result showed that the highest abundance of Drupella sp. found at station 1 and the lowest at station 2. It is suggested that related to percentage of live coral cover as the highest was at station 1 and the lowest was at station 2.Studies revealed that Drupella sp. prey particulary on living coral. Furthermore, our observations indicated that Drupella sp. more attracted to coral Porites and Pocillopora. This prey preferences are thought to be due to the highest abundance of these corals at all study sites.

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jmrt@unud.ac.id

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Jalan Kampus UNUD Bukit Jimbaran-Bali, 80363

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Bali

INDONESIA