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Phytoplankton Diversity as Ecological Indicator in Jimbaran Bay Waters Perwira, Ima Yudha; Ulinuha, Devi
Journal of Environment Vol 1 No 1
Publisher : Graduate Study of Environmental Sciences, Postgraduate Program of Udayana University

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A study was carried out to evaluate the ecological condition in Jimbaran Bay Waters by using Phytoplankton Diversity Index. The study was conducted at Balangan, Pemuda, Jimbaran, Kedonganan, Kelan and Segara Beach located in Jimbaran Bay. Shannon-Wiener diversity index was used to analyze the ecological condition, supported by analysis on water quality including dissolved oxygen (DO), biological oxygen demand 5 days (BOD5), water pH, and water salinity. There were 51 species of phytoplankton classified to 5 classes had been observed from this study: Bacillariophycae, Cyanophyceae, Zygnemophyceae, Dinophyceae, and Chlorophyceae. Balangan beach showed higher diversity index (H) and evenness index (E) (H = 1.19; E = 0.29) compared to the other site (Pemuda: H = 0.89, E = 0.25; Jimbaran: H = 0.89, E = 0.26; Kedonganan: H = 0.96, E = 0.28; Kelan: H = 0.85, E = 0.20; and Segara: H = 0.91, E = 0.33). However, overall ecological condition showed diversity index more than 1 (H = 1.44; E = 0.27). Measurement of water quality showed that the highest quality of water was shown by Balangan Beach (DO 5.2 mg/L, pH 7.2, salinity 29 ppt, and BOD5 0.9 mg/L), while the lowest was shown by Kelan Beach (DO 4.2 mg/L, pH 7.2, salinity 29 ppt, and BOD5 2.9 mg/L). Result of the study showed that ecological status of Jimbaran Bay Waters was having moderate diversity, sufficient productivity, and medium ecological pressure (pollution).

Study on Mollusk and Algae or Phytoplankton Community in Southeast Waters of Bali Ulinuha, Devi; Perwira, Ima Yudha
Journal of Environment Vol 1 No 1
Publisher : Graduate Study of Environmental Sciences, Postgraduate Program of Udayana University

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A study was carried out to observe the relation between mollusk with algae or phytoplankton in southeast waters of Bali. The study was conducted at Mertasari, Sindhu, Serangan, Purnama, and Kethewel beach. Shannon-Wiener diversity index was used to analyze the ecological condition, supported by analysis on water quality including dissolved oxygen (DO), biological oxygen demand 5 days (BOD5), water pH, and water salinity. There were 34 species of phytoplankton found in this study. The most predominant phytoplankton species in each beach were Navicula sp at Mertasari, Nitzschia sp at Sindhu, Pseudo-nitzschia sp at Purnama, Chaetoceros sp at Kethewel. Observation on macro algae showed that Ulva sp was to be the most predominant species in Serangan, Mertasari, and Sindhu beach (17.95, 16.25, and 17.81%). In mollusk observation, gastropod groups showed to be higher number than bivalve group. Nassarius sp showed to be the most predominant in Serangan beach (13.33%), while Ruditapes sp was predominant in Mertasari and Sindhu beach (11.59% and 14.81%). The highest diversity index of phytoplankton was shown by Kethewel beach (H = 1.35), while the lowest was shown by Shindu beach (H = 0.95). The highest diversity index of macroalgae was shown by Serangan beach which showed H = 2.08, while the lowest was shown by Purnama beach which showed H = 0.69. Serangan beach showed the highest diversity index (H = 2.72) with E = 0.66 compared to another locations, while Kethewel beach showed the lowest diversity index (H = 0.69 and E = 1). There was a relation between the existences of gastropod as the highest number of mollusk and Ulva sp as the gastropod feed.

Dekomposisi bahan organik pada sedimen di Tukad Mati dan Tukad Badung, Bali Ima Yudha Perwira; Rani Ekawaty; Alfi Hermawati Waskita Sari; Devi Ulinuha
Journal of Marine and Aquatic Sciences Vol 5 No 2 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The sediment properties of Mati and Badung River, Bali were observed in this study. This study was aimed to know the relation between carbon, nitrogen and total bacterial number in the sediment of those rivers. This study was carried out in Mati and Badung River located in Southern part of Bali, Indonesia. Total carbon (TC), total nitrogen (TN), and total bacterial number of the sediment were observed in this study. Slow stirring method was used to estimate the total bacterial number in sediment, based on their environmental DNA intensity after agarose gel electrophoresis. TC of sediment was analyzed by using total carbon analyzer after combustion at 900oC, while TN was analyzed by using indophenol blue method after digested using Kjeldahl at 420oC for 1.5 hours. The result showed that TC of sediment in the Mati and Badung River were 6,100 and 7,000 mg/kg, respectively. TN of sediment in the Mati and Badung River were 380 and 440 mg/kg, respectively. The pH and electrical conductivity (EC) of sediment in the Mati River were 6,88 dan 0,10 µs/cm, while in the Badung River were 6,80 dan 0,11 µs/cm. Total bacterial number in the Mati river was lower (4.8 × 108 cell /g) than that in the Badung river (3.8 × 108 cell/g). The high value of R2 between total bacterial and TC (0.91), and between total bacterial number and TN (0.83), indicating the high influence of bacteria on the decomposition of organic materials in the sediment.

Karakteristik Total Padatan Tersuspensi (Total Suspended Solid) Dan Kekeruhan (Turbidity) Secara Vertikal Di Perairan Teluk Benoa, Bali I Gede Hendrawan; Devi Ulinuha; I Putu Ranu Fajar Maharta
Journal of Marine and Aquatic Sciences Vol 2 No 1 (2016)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Benoa bay is one of estuary that located in the Southern part of Bali Island, and as a strategic tourism destination. The increased of the human activity has an important role to give an ecological pressure for the seawater ecosystem in the Benoa bay. Total suspended solid (TSS) and turbidity is one of the important indicators that could be determining the quality of the seawater. As the estuary, Benoa bay received fresh water from the river discharge that also potentially carries any material to the bay. In addition, port activity is also has an important role in contributing a various material to the Benoa bay. From this research, we found that the TSS concentration and the turbidity are higher in the surface water and also in the bottom layer. TSS concentration and the turbidity also varied from the bay mouth trough the line of vessel onto the inner of bay. TSS concentration and turbidity in the bay mouth has a smaller concentration rather than in the inner part of bay. TSS concentration and turbidity in the inner of bay could be caused by the port activity. In addition, seawater circulation is also has an importan factor to contributing the TSS concentration and the turbidity. Sea current would be erroted the seabottom and with the different shape of the topography could be increased the TSS and turbidity.

Profil Nitrat dan Fosfat pada Air secara Vertikal di Danau Batur, Bali Ima Yudha Perwira; Nyoman Dati Pertami; Devi Ulinuha; Farhan Danu Fauzan
Journal of Marine and Aquatic Sciences Vol 7 No 1 (2021)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2021.v07.i01.p04

The aimed of this study was to determine the reproductive biology aspects of longtail tuna, namely the gonad maturity level, gonadal maturity index, fecundity and length of first maturity. Fish samples were obtained from the catches of fishermen in the Bali Strait which landed at PPP Muncar from December 2018 to February 2019. Gonad maturity level of longtail tuna in December 2018 was mostly found in immature conditions (TKG I). TKG III and IV are most commonly found in February. The highest IKG value was found in February 2019 (0.017). This can be interpreted that lontail tuna experienced peak spawning and was actively reproducing in February. The sex ratio of gray tuna is dominated by male. Fecundity at TKG III ranged from 18,800 to 33,200 grains and at TKG IV of 154,000 grains. The length of first maturity of longtail tuna was 495 mmFL (male) and was 487 mmFL (female).

Biomonitoring Kesehatan Kerang Abalone (Haliotis squamata) Hasil Tangkap di Perairan Mengening, Bali Dengan Pengamatan pada Aktifitas Fagositosisnya Devi Ulinuha; Ima Yudha Perwira
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The health level of captive abalone (Haliotis squamata) in Mengening waters, Bali Island, was observed through observation on the phagocytosis activities. This study was aimed to determine the health level of abalone in the Mengening waters influenced by their environmental factors. The method is in this study was descriptive, through observation on any parameters of the immunity including: Total hemocyte count (THC) and Percentage of Fagocytosis. Water quality in the location was also measured, including Dissolved Oxygen (DO), pH, water temperature, and water salinity. THC of Abalone in Mengening waters was 2.03 x 106 celss/ml, while the percentage of phagocytosis was 75,9%. Water quality during the study showed optimal condition (DO: 5.9-6.1 ppm; pH: 7.8; water temperature: 25.1-31.5oC; and water salinity: 33-34 ppt), even there was fluctuation on the water temperature (>5 oC) between morning and afternoon.

ASOSIASI MAKROZOOBENTOS PADA PADANG LAMUN DI PANTAI MERTA SEGARA SANUR, BALI Gede Surya Indrawan; Deny Suhernawan Yusup; Devi Ulinuha
Jurnal Biologi Udayana Vol 20 No 1 (2016): Jurnal Biologi
Publisher : Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

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Makrozoobentos merupakan salah satu komunitas organisme dasar perairan yang berasosiasi dengan ekosistem lamun. Penelitian ini bertujuan mengetahui asosiasi makrozoobentos dengan kepadatan padang lamun dan tipe sedimen di Pantai Merta Segara. Penelitian dilaksanakan bulan Oktober-Desember 2013 pada waktu surut terendah.engambilan sampel dilakukan dengan metode transek kuadrat yang terdiri dari 3 transek dan dibentangkan sepanjang 300 m dengan interval antar transek 50 m. Hasil penelitian diperoleh Indeks diversitas (H’) 4,7 dan Indeks keseragaman (E) 0,85, mengindikasikan bahwa kawasan tersebut tergolong stabil. Jumlah jenis ditemukan 47 jenis dalam 9 kelas, dengan spesies yang mendominansi Eurythoe sp. (Polychaeta), dan nilai indeks dominansi (C) 0,05. Presentase tutupan lamun rata-rata sebesar 51,10 %, sedangkan tipe sedimen di dominansi oleh koarsa dan pasir kasar. Sebaran makrozoobentos menunjukkan adanya asosiasi dengan kepadatan tutupan lamun dan tipe sedimen gravel.

Bioakumulasi Timbal (Pb) pada Bivalvia (Anadara antiquata, Anadara granosa dan Perna viridis) dari Perairan Lekok, Pasuruan Devi Ulinuha; Ima Yudha Perwira
Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2022.v08.i02.p02

Lead is one of inorganic material causes pollution in waters that have a high level of toxicity for organisms. Lead pollution in waters can be accumulated by several water organisms, such as Bivalves. Bivalves are type of shellfish that can accumulate heavy metals. This study aimed to know the bioaccumulation of Lead on the Bivalves (Anadara antiquata, Anadara granosa dan Perna viridis) found in Lekok water (Pasuruan, Jawa Timur). The amount of Lead in the water, sediment and Bivalves was measured by using Atomic Absorption Spectro-photometer (AAS). The bioaccumulation of Lead on the Bivalves was analyzed by using Bioconcentration Factor (BCF). The result showed that amount of Lead in the water and sediment were 0,356 mg/L and 21,245 mg/kg, respectively. The BCF value of Lead on the Bivalves of Lekok waters were <30 indicating low accumulation level.

KEBERAGAMAN JENIS MANGROVE DAN IKTIODIVERSITAS SUMBERDAYA IKAN DI KAWASAN PERAIRAN TELUK BENOA, BALI Sagala, Desima Helfiana; Pertami, Nyoman Dati; Ulinuha, Devi
TRITON: Jurnal Manajemen Sumberdaya Perairan Vol 21 No 1 (2025): TRITON: Jurnal Manajemen Sumberdaya Perairan
Publisher : Departement of Aquatic Resources Management, Fisheries and Marine Science Faculty, Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/TRITONvol21issue1page36-44

The function and role of mangroves in Bali's Benoa Bay has been proven to be ecologically and economically beneficial to the environment and society. The mangrove forests in this area have muddy substrates that support the growth of mangroves and mangrove-associated biota. However, ecological pressure due to anthropogenic activities has caused problems that threaten the sustainability of mangrove ecosystems. The purpose of this study was to identify mangrove species, determine the biodiversity captured in the Benoa Bay water area, Bali, and determine environmental parameters as supporting data for aquatic ecological conditions in the Benoa Bay water area, Bali. This research was conducted in the mangrove forest area of Benoa Bay, Bali in September-November 2023. Sampling was done 3 times at 3 locations namely Pulau Penyu, Kedonganan, Kampung Kepiting. Mangrove sampling uses plot sampling method, while for fish resource data using actual fishing method for 3 months with 1 month interval. Data analysis carried out in this study is the analysis of mangrove vegetation including diversity index and ichthyodiversity analysis (fish diversity). For water quality parameters refer to quality standards according to established rules. The results showed that the types of mangroves found were Rhizophora apiculata, Ceriops tagal, Avicennia marina, Bruguiera gymnorrhiza, Bruguiera cylindrica, Sonneratia alba, Rhizophora mucronata, Ceriops decandra. The types of fish resources found consisted of 8 orders, 15 families, 23 species with a total of 226 individuals. The level of diversity of fish resources in the three research locations is classified as moderate. The value of water quality parameters is in the range of quality standards that support the growth of mangroves and biota associated with mangroves. ABSTRAK Fungsi dan peran mangrove di Teluk Benoa Bali telah terbukti secara ekologis dan ekonomis bermanfaat bagi lingkungan dan masyarakat. Hutan mangrove di kawasan ini memiliki substrat berlumpur yang mendukung pertumbuhan mangrove serta biota yang berasosisasi dengan mangrove. Namun, tekanan ekologis akibat aktivitas antropogenik menyebabkan munculnya permasalahan yang mengancam keberlanjutan ekosistem mangrove. Tujuan penelitian ini yaitu mengidentifikasi jenis mangrove, mengetahui iktiodiversitas yang tertangkap di Kawasan perairan Teluk Benoa, Bali, serta mengetahui parameter lingkungan sebagai data dukung kondisi ekologi perairan di kawasan perairan Teluk Benoa, Bali. Penelitian ini dilakukan di kawasan hutan mangrove Teluk Benoa, Bali pada September-November 2023. Pengambilan sampel dilakukan 3 kali pada 3 lokasi yaitu Pulau Penyu, Kedonganan, Kampung Kepiting. Pengambilan sampel mangrove menggunakan metode plot sampling, sedangkan untuk data sumberdaya ikan menggunakan metode actual fishing selama 3 bulan dengan interval 1 bulan. Analisis data yang dilakukan pada penelitian ini yaitu analisis vegetasi mangrove meliputi indeks keanekaragaman dan analisis iktiodiversitas (keanekaragaman ikan). Untuk parameter kualitas air merujuk pada baku mutu sesuai aturan yang ditetapkan. Hasil penelitian menunjukkan jenis mangrove yang ditemukan yaitu Rhizophora apiculata, Ceriops tagal, Avicennia marina, Bruguiera gymnorrhiza, Bruguiera cylindrica, Sonneratia alba, Rhizophora mucronata, Ceriops decandra. Jenis sumberdaya ikan yang ditemukan terdiri atas 8 ordo, 15 famili, 23 spesies dengan total individu 226. Tingkat keanekaragaman sumberdaya ikan pada ketiga lokasi penelitian tergolong sedang. Nilai parameter kualitas air berada pada kisaran baku mutu yang mendukung pertumbuhan mangrove serta biota yang berasosiasi dengan mangrove. Kata Kunci: Mangrove, keberagaman, iktiodiversitas, kualitas air, Teluk Benoa

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