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All Journal Jurnal Ilmiah Merpati (Menara Penelitian Akademika Teknologi Informasi) Lontar Komputer: Jurnal Ilmiah Teknologi Informasi Journal of Marine and Aquatic Sciences Buletin Udayana Mengabdi Ecotrophic, Journal of Environmental Science ILMU KELAUTAN: Indonesian Journal of Marine Sciences Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Scientific Journal of Informatics Journal of Marine Research and Technology INTERNATIONAL JOURNAL OF ENVIRONMENT AND GEOSCIENCES Ulil Albab

I Dewa Nym. Nurweda P.,

Program Studi Ilmu Kelautan, Fakultas Kelautan Dan Perikanan, Universitas Udayana Kampus Unud Jimbaran, Badung, Bali, Indonesia

Author-ID : 335971

Religion Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Social Sciences

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Hubungan Kelimpahan dan Keanekaragaman Fitoplankton dengan Kelimpahan dan Keanekaragaman Zooplankton di Perairan Pulau Serangan, Bali Luh Putu Puspita Dewanti; I Dewa Nyoman Nurweda Putra; Elok Faiqoh
Journal of Marine and Aquatic Sciences Vol 4 No 2 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Plankton is one of the biological resources that have an important role in the marine ecosystem. Plankton life is strongly influenced by the water quality parameters, one of which is the content of nutrients (nitrates and phosphates). Increased nutrient content caused by the increased load input from human activities. Serangan Island waters including the coastal ecosystem is widely used for a variety of human activities, such as tourism, aquaculture, residential, and transportation. All human activity will affect water quality will lead to an increase in nutrients and organic matter which in turn can lead to changes in water quality chemical physics and structure of plankton. The purpose of this study was to determine the relationship of the abundance and diversity of phytoplankton abundance and diversity of zooplankton and to know the physical parameters - chemical effect on the abundance of plankton. The method used is the Pearson correlation analysis to determine the relationship between abundance and diversity of phytoplankton abundance and diversity of zooplankton, and principal component analysis to look at the parameters of the water the most influence on the abundance of plankton. Results of Principal Component Analysis showed that the waters of the parameters that influence the abundance of plankton varies at each observation station. Pearson correlation analysis showed a strong relationship between the abundance of phytoplankton to zooplankton abundance with a correlation value of 0.64.

Pengaruh Sebaran Konsentrasi Klorofil-a Berdasarkan Citra Satelit terhadap Hasil Tangkapan Ikan Tongkol (Euthynnus sp) Di Perairan Selat Bali I Made Satya Prayoga; I Dewa Nyoman Nurweda Putra; I Gusti Ngurah Putra Dirgayusa
Journal of Marine and Aquatic Sciences Vol 3 No 1 (2017)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

One of fisheries potential in Bali Strait is tuna fish (Euthynnus sp). Tuna fish (Euthynnus sp) resources is highly influenced by waters productivity which indicated by the chlorophyll-a concentration distribution. The aims of this study are: to find out the concentration spatial of chlorophyll-a distribution in Bali strait, to find out temporal variability of chlorophyll-a and tuna fish (Euthynnus sp) in Bali strait, and to find out the influence of chlorophyll-a concentration distribution to the catch of tuna fish (Euthynnus sp) in Bali strait. The analysis of the influence of chlorophyll-a concentration distribution to the catch of tuna fish (Euthynnus sp) in Bali strait uses regression polynomial order 2, correlation, and cross correlation. The influence of chlorophyll-a concentration distribution to the catch of tuna fish (Euthynnus sp) in Bali strait yearly time series climatology amounted to R2 = 0,1624 or 16,24%, the correlation coefficient values obtained by r = 0,1889. Seasonal time series climatology in west season (December - February) R2 = 0,0707 or 7,07%, the correlation coefficient values obtained by r = 0,0749. The transitional season 1 (March - May) R2 = 0,0095 or 0,95%, the correlation coefficient values obtained by r = - 0,0092. The east season (June - August) R2 = 0,086 or 8,6%, the correlation coefficient values obtained by r = - 0,2155. The transitional season 2 (September - November) R2 = 0,0482 or 4,82%. The correlation coefficient values obtained by r = - 0,1805

Simpanan Karbon pada Padang Lamun di Perairan Tanjung Benoa, Bali I Komang Agus Parnata; I Dewa Nyoman Nurweda Putra; Gede Surya Indrawan
Journal of Marine and Aquatic Sciences Vol 6 No 1 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i01.p02

Human activity is the biggest contributor to carbon dioxide (CO2) gas into the air. Coastal ecosystems that have the ability to absorb and store carbon over a relatively long period of time are seagrass beds. Seagrass is able to absorb carbon with an average of 0.21 tons / ha. Research on Carbon Deposits in Seagrass in Tanjung Benoa Waters, Bali was conducted in February 2019. Determination of the sampling point was done by purposive sampling method. This research uses the dry ashing method which is carried out by crushing the sample components at 500?C in an electric furnace. Seagrass species obtained in Tanjung Benoa waters are Cymodocea Serrulata, Cymodocea Rotundata, Thalassia hemprichii, Syringodium isoetifolium, Halodule pinifolia, Halophila ovalis and Halodule uninevis. The results showed the seagrass density of Tanjung Benoa waters, Bali was included in the sparse to dense category with density values ??ranging from 195-1252 stands / m2. The content of seagrass carbon at the bottom of the substrate (roots and rhizoma) is 86.421 grams of dry weight (gbk / m2), while the top of the substrate (leaves) is 33.774 grams of dry weight (gbk / m2). The carbon content at the bottom of the substrate is higher than the top of the substrate because at the bottom of the substrate is not too affected by environmental physical factors. where the highest carbon content is Thalassia hemprichii seagrass with a value of 625.36 gC / m², while the lowest carbon content is Halophila ovalis with a value of 89.91 gC / m².

Pengaruh Indian Ocean Dipole (IOD) Terhadap Produksi Penangkapan Ikan Lemuru (Sardinella lemuru) di Perairan Selat Bali I Dewa Gede Alit Sujana; I Dewa Nyoman Nurweda Putra; Ni Luh Ria Puspitha
Journal of Marine and Aquatic Sciences Vol 6 No 1 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i01.p07

Indonesia is one of tropical country which is very vulnerable to extreme phenomena in its water, such as Indian Ocean Phenomena (IOD) that occurred in Indian Ocean. The Bali Strait is directly adjacent to the Indian Ocean in the south area. Bali Strait is a region in Indonesia that has a high potential fishery resources namely, lemuru (Sardinella lemuru). The purpose of this study is to observe correlation and influence of IOD on lemuru production in Bali Strait between 2012 - 2016. The data used in this research are lemuru data was collected from 3 fish landing base namely PPP Muncar, PPN Pengambengan and PPI Kedonganan and IOD data used Dipole Mode Index (DMI) monthly from 2012 – 2016. The calculation used correlation equation, regression of second order polynomial. The highest lemuru production during 5 years, from 2012 untill 2016 was in 2015, accounted of 27,144,784 kg and the lowest production was in 2012 accounted of 5,644,146 kg. Based on that results, the highest yield of lemuru in the transition period II (September - November) of 31,938,833 kg with an average yield of 2,129,256 kg and the lowest was in east season (June - August) of 9,216,230 with average yield of 614,415 kg. The influence of IOD Index with lemuru production in Bali Strait has a determination value (R2) of 0.0558 and has a correlation of 17.40% with a positive influence (directly proportional). It was categorized as very weak.

Kerapatan Hutan Mangrove Berbasis Data Penginderaan Jauh di Estuari Perancak Kabupaten Jembrana-Bali I Made Putra Kresnabayu; I Dewa Nyoman Nurweda Putra; Yulianto Suteja
Journal of Marine and Aquatic Sciences Vol 4 No 1 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The mangrove ecosystem is one of the objects that can be identified by using remote sensing technology. The geographical location of the mangrove ecosystem located in the land and sea transition areas provides a distinctive recording effect when compared to other land vegetation objects. Remote sensing information about vegetation density is useful for various needs such as estimation of the availability of wood fuel biomass, succession stages, forest degradation and so on. This study aims to map the mangrove density using NDVI mangrove vegetation index from Landsat 8 image in Estuari Perancak, Jembrana, Bali. The study was conducted on August 20, 2016 until August 25, 2016. The analysis used is correlation analysis and t-Test analysis. Based on the results of the study, it was found that the density class was rare, medium and tight. The density class rarely has a pixel value range from 0.4765 to 0.6128, the medium density class has a pixel value range of 0.6128 to 0.7093, and the dense or dense density has a pixel value range of 0.7093 to 0.7947. The dominant mangrove species is Rhizopora sp. The linear regression equation in the above figure shows y = 0.679x + 0.438 and with the correlation (r) of 0.9642. This means that the density of mangroves and NDVI is directly proportional. Where the higher the value of mangrove density, the higher the value of NDVI and reserve.

Analisis Temporal Suhu Permukaan Laut di Perairan Indonesia Selama 32 Tahun (Era AVHRR) I Nyoman Januarta Triska Putra; I Wayan Gede Astawa Karang; I Dewa Nyoman Nurweda Putra
Journal of Marine and Aquatic Sciences Vol 5 No 2 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

One of the important factor that influences global climate dynamics is sea surface temperature (SST). Indonesian waters are semi-closed and located between the Pacific and Indian Oceans so that they have different characteristics of SPL in each region. The purpose of this research is to know the trend and local characteristics of Indonesian SST and adjacent areas in response to 6-monthly and seasonal variability with moving average method and correlation. The data used are SST data from AVHRR satellite with domain 15°N-15°S, 90°-145° E. The results showed of increase trend 0.34°C in Indonesian sea for 32 years (1981-2012). The characteristics of SST in Indonesian territory are closely related to the Mosoon cycle where in the East period in the northern region the Natuna Sea is warmer in contrast to the West monsoon period, in the southern part of the Arafura Sea to the warmer Sawu Sea and around the equator experiencing the warmest in the transitional period. The moving-average analysis shows that 6-monthly variability appears to be dominated in equatorial waters including the Java Sea and Banda Sea whereas seasonal variability occurs in the northern and southern regions of Indonesia's waters including the Pacific Ocean Oceans, the northwest Pacific Ocean and the southeast Indian Ocean. Based on correlation analysis, ENSO has a strong (negative) relationship in eastern Indonesia waters including the Sea in the northern part of Papua and the northwest Pacific Ocean while IOD has a strong (negative) relationship in the western Sumatra Sea, Banda Sea and Arafura Sea.

Kajian Kesesuaian Wisata Selam dan Snorkeling di Perairan Tulamben, Karangasem, Bali Nur Asni Puspita Sari; I Dewa Nyoman Nurweda Putra; I Gusti Ngurah Putra Dirgayusa
Journal of Marine and Aquatic Sciences Vol 3 No 1 (2017)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Tulamben village located in the district of Kubu, Karangasem regency, has developed into one of the maritime destination, especially diving and snorkeling. Based on data from the Department of Culture and Tourism of Bali, the average number of tourists coming to Tulamben in 2012-2014 reached 94,253 tourists. This condition makes the tourism has grown into a major economic support local communities in the Tulamben. Economic growth without being accompanied by an appropriate management plan will certainly produce a negative impact on coastal and marine resources to be a major asset for the growth. Various forms of management that allows to be applied has been identified in an effort to support the sustainability of the ecological, economic and socio-cultural community. This study was conducted to analyze the suitability of diving and snorkeling, coral identification were examined using LIT (Line Intercept Transect) methods while the abundance of reef fish species assessed using visual underwater cencus (UVC). Analysis of the data used is the analysis of the potential reef and suitability. Determination of the suitability of the area as a tourist diving and snorkeling analysis using matrix parameters to consider the appropriateness of the ecological conditions and water quality conditions of the four classifications. Cover of live coral communities ranged between 16.26% -52.48% with a diversity of reef fish species ranged between 11-44 types. Travel suitability index (IKW) category snorkeling and diving are included in the category is not appropriate (N) and the corresponding (S2).

Simpanan Karbon Pada Padang Lamun di Kawasan Pantai Mengiat, Nusa Dua Bali I Kadek Vidyananda S Rahadiarta; I Dewa Nyoman Nurweda Putra; Yulianto Suteja
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Human activity is the most contributor of carbon dioxide gas (CO2) to the air. The oceans have an important role in the carbon cycle, about 93% of the Earth's CO2 is stored in the oceans. Seagrass is one of sea plants that has a role as carbon sinks in ocean. Seagrass beds are able to absorb carbon by an average 0.21 tons/ha and the important species are Enhalus acoroide. The aim of this study is determine the carbon storage in seagrass at aboveground (leaf), belowground (roots and rhizomes) and carbon storage on each species of seagrass obtained at Mengiat coastal area. Determination of sampling point refer to seagrass density that used by purposive sampling. This method was assumed to represent or describe the condition of this area. This research used dry dyeing method which components sample was destruction with 500oC inside the furnace. The results showed that carbon storage of seagrass at belowground (root and rhizoma) is 25.70 gC/m2, and aboveground (leaf) is 17.18 gC/m2. Carbon storage at belowground is higher than aboveground because carbon will accumulate in the sediment. The type of seagrass that is obtained at Mengiat coastal area is Thalassodendron ciliatum, Thalassia hemprichii, Cymodocea serrulata, Halodule uninervis, Cymodocea rotundata, and Syringodium isoetifolium, the highest carbon storage are 62.46 gC/m2 is owned by Thalassodendron ciliatum, and the lowest carbon storages are 17.25 gC/m2 is owned by Syringodium isoetifolium.

Bahan Organik Total dan Kelimpahan Bakteri di Perairan Teluk Benoa, Bali Ni Luh Eta Yuspita; I Dewa Nyoman Nurweda Putra; Yulianto Suteja
Journal of Marine and Aquatic Sciences Vol 4 No 1 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Benoa Bay is semi-enclosed waters that have various activities. The existence of these activities will contribute to organic matter in the waters so that the effect on the presence of bacteria. This study aims to determine the total concentration of total organic matter (TOM) and bacterial abundance as well as its spatial and temporal distribution, and to determine the relationship of TOM concentration to bacterial abundance in the waters of Benoa Bay. Data collection is conducted on the surface of the waters in December 2016 to February 2017 when ebb conditions at 5 Benoa Bay water stations. Measurement of organic matter using permanganate test in titimetry based on standard methods SNI 06-6989.22-2004. Measurement of bacterial abundance using Total Plate Count (TPC) method. The TOM concentrations ranged from 63.20 to 65.10 mg/l and bacterial abundances ranged from 30 to 300 CFU/ml. Spatial distribution of TOM concentration and bacterial abundance tends to be higher close to Suwung Landfills (TPA) activity, floating net cage cultivation (KJA) activity in Serangan waters, and Buaji river estuary and tend to be lower approaching Benoa harbor activity and waters further from those activities. The concentration of TOM and bacterial abundance in December 2016 to February 2017 have fluctuating values. Based on the interpretation of the correlation coefficient, the level of relationship between BOT concentration and bacterial abundance in the waters of Benoa Bay is quite strong.

Studi Hindcasting Dalam Menentukan Karakteristik Gelombang dan Klasifikasi Zona Surf Di Pantai Uluwatu, Bali Karina Santoso; I Dewa Nyoman Nurweda Putra; I Gusti Bagus Sila Dharma
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Bali is one of the islands where there are many surf zones with various characteristics. In addition, Bali is also a heaven with a classy wave for the surfers of the world. One of the most challenging places to surf in Bali is Uluwatu Beach. Uluwatu Beach is ranked the 3rd best surf spot in the world version of CNN Travel in 2012. Wind causes sea waves, therefore wind data can be used to estimate the height and direction of the waves. Wave Hindcasting with Sverdrup, Munk and Bretschneider (SMB) method is calculated based on wind data for 10 years (2001 - 2010) from BMKG Ngurah Rai Station - Denpasar to obtain a significant wave height and period. In this research, it is necessary to approach through Hindcasting procedure, wave transformation analysis and surfing Terminology in determining the type of breaking wave and classification of surf zone in Uluwatu Beach area. Wave calculation result in Uluwatu Beach dominated by wave that coming from west side with significant wave height (Hs) of 0.98 m and significant wave period (Ts) of 5.21 s. The wave height due to the influence of wave refraction and shoaling is 0.976 m. The breaking wave height obtained from the calculation is 1.04 m at a depth of 0.849 m. From the result in this research, it can be concluded that the breaking wave type that occurred at Uluwatu Beach is plunging type according to the calculation result from its Irribaren number (0.4 <Ni <2.3). The classification of the surf zone at Uluwatu Beach based on its breakup type of wave is thought to be a good zone for surfers on intermediate level.

Co-Authors A. A. Md. Ananda Putra Suardana Alanis Ismi Akasia Anak Agung Kompiang Oka Sudana Ayu Wirdiani Brasika, Ida Bagus Mandhara Dewa Ayu Mira Prabaswari Diah Pertami Dzaki Adilla Razaan Dzaki Adilla Razaan Elok Faiqoh Eloq Faiqoh Elvita Rahmani G M Arya Sasmita Gede Surya Indrawan Gede Surya Indrawan Gede Yuda Kamajaya Hendra Yoga Pratama Herlambang Aulia Rachman I Dewa Gede Alit Sujana I Gede Hendrawan I Gusti Bagus Sila Dharma I Gusti Ngurah Putra Dirgayusa I Gusti Putu Ary Wedangga I Gusti Putu Bayu Arri Putra I Kade Alfian Kusuma Wirayuda I Kadek Vidyananda S Rahadiarta I Ketut Adi Purnawan I Komang Agus Parnata I Made Putra Kresnabayu I Made Satya Prayoga I Nyoman Januarta Triska Putra I Putu Agung Bayupati I Putu Yogi Darmendra I Wayan Arthana I Wayan Gede Astawa Karang I Wayan Nuarsa I Wayan Nuarsa Ida Bagus Andika Putra Ida Bagus Kade Putra Susila IGA Ayu Mirah Indraiswari Kadek Ayun Wardimas Karina Santoso Kholifatul Aziz Komang Gede Kurniadi Kuncoro Teguh Setiawan Luh Putu Puspita Dewanti Made Pande Darmawan Mark Johannes Wiggers Ngurah Padang Adnyana Ni Kadek Ayu Dwi Lestari Ni Luh Eta Yuspita Ni Luh Putu Ria Puspitha Ni Made Pitria Menala Saputri Ni Putu Ayu Aryanti Ni Wayan Ayu Astini Sari Ni Wayan Sintaningsih Nur Asni Puspita Sari Pande Komang Egar Prihandana Priscilla Princessa Amalo Putra, I Nyoman Giri Putu Hernanda Krishna Ariszandy Putu Natalia Sarasvati Putu Wira Buana Ramadhani Ahmad Rowand Danny Sebastian Adinegoro Septi Novita Sari Suprapto, Nyoman Arto Syifa’ul Qolbiyatun Nisa Takahiro Osawa Takahiro Osawa Tania Maria Octarina Taradhita, Dewa Ayu Nadia Valenthio Sidauruk Veranita Lamrotua Sihombing Widiastuti Karim Widiastuti Karim Widiastuti Widiastuti Widiastuti Widiastuti Yasa, Putu Kumara Yulianto Suteja

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