scholarly journals Diversity of Echinoderms in Paranti Beach, Tabang Village, Rainis District, Talaud Islands Regency, North Sulawesi Province

2019 ◽  
Vol 10 (2) ◽  
pp. 39
Author(s):  
Subrita Lalombombuida Lalombombuida ◽  
Marnix Langoy ◽  
Deidy Y. Katili
Keyword(s):  
Data Analysis ◽  
Random Sampling ◽  
Sea Urchins ◽  
Diversity Index ◽  
Dominance Index ◽  
North Sulawesi ◽  
Index Value

This study aims to analyze the diversity of Echinoderms in Paranti Beach, Rainis District, Talaud Islands Regency, North Sulawesi Province. The method used was purposive random sampling and quadrat plot of 20 plots measuring 1m x 1m. Data analysis used diversity index Shannon and Wienner, value index, density, frequency and dominance index. The results of the study were found on the coast of Parantin Beach, namely; 27 species from 4 classes of Echinodermata which include the class Asteroidea (starfish), Echinodea (sea urchins), the class Holothuroidea (Teripang) and the class Ophioroidea (Star snake). Diversity index value on the coast of Paranti, namely at Station I (0.40); Station II (1.56) and at Station III (1.50). This number shows that the diversity of Echinoderms in Paranti Beach at Station I is relatively low and that for Station II and III are abundant.Keywords: Diversity, Echinodermata, Talaud Islands Regency ABSTRAKPenelitian ini bertujuan untuk menganalisis keanekaragaman Echinodermata di Pantai Paranti, Kecamatan Rainis, Kabupaten Kepulauan Talaud provinsi Sulawesi Utara. Metode yang digunakan adalah purposive random sampling dan petak kuadrat sebanyak 20 petakyang berukuran 1m x 1m. Analisi data yang digunakan indeks diversitas Shanon dan Wienner, indeks nilai pentinh, Kepadatan, frekuensi dan indeks dominansi. Hasil penelitian ditemukan dipesisir Pantai Parantin yaitu; 27 spesies dari 4 kelas Echinodermata yang termasuk yaitu kelas Asteroidea (bintang laut), Echinodea (Bulu babi), kelas Holothuroidea (Teripang) dan kelas Ophioroidea (Bintang ular). Nilai indeks Keanekaragaman di pantai Paranti yaitu pada Stasiun I (0,40); Stasiun II (1,56) dan pada Stasiun III (1,50). Jumlah ini menunjukan bahwa Keanekaragaman Echinodermata di Pantai Paranti pada Stasiun I tergolong rendah dan untuk Stasiun II dan III sedang melimpah.Kata kunci: Keanekaragaman, Echinodermata, Kabupaten Kepulauan Talaud 

scholarly journals Assessment and Composition of Fish in the River District Maro Merauke

2018 ◽  
Vol 73 ◽  
pp. 04006
Author(s):  
Edy H.P Melmambessy ◽  
Irianis L. Latuperissa ◽  
Marius Agustinus Welliken ◽  
Nova Suryawati Monika ◽  
Rosa Delima Pangaribuan
Keyword(s):  
Data Analysis ◽  
Species Composition ◽  
Diversity Index ◽  
Survey Method ◽  
Frequency Diversity ◽  
Lates Calcarifer ◽  
Dominance Index ◽  
Gill Net ◽  
Scomberomorus Commerson ◽  
Index Value

Maro River is one of the major rivers in Merauke Regency that has a width of about 43-900 m and length of 300 km. The purpose of this study is to find out the type and composition of fish caught using gill net in Maro River, Merauke Regency. This study was conducted in Maro River, Merauke Regency from May to June 2014. It was conducted using survey method. The data analysis included: species composition, relative abundance, availability frequency, diversity index and dominance index. The results of showed 1,084 fish in 17 species with the following composition; 490 of Kurtus gulliveri species (37,01%), 212 of Eleutheronema tetradactylum species (20,33%), 170 of Polydactylus plebeius species (16,30%), 75 of crassilabris Cinetodus species (7,19%), 64 of Cinetodus froggatti species (6,14%), 37 of Argyrosomus amoyensis species (3,55%), 20 of Mugil cephalus species (1,92%), 15 of Megalops cyprinoides species (1,53%), 15 of Thryssa scratchleyi species (1,4%), 12 of Lebtobrama sp species (1,15%), 9 of Lates calcarifer species (0,86%), 7 of Marilyna meraukensis species (0,67%), 7 of Scomberomorus commerson species (0,67%), 5 of Nibea squamosal species (0,48%), 4 of Rhinoptera javanica species (0,38%), 3 of Harpadon microchir species (0,29%) and 1 of Datnioides campbelli species (0,10%). Based on the availability frequency, there are 37 species with a percentage of 100%, 37 species with 67% and 7 species with 33%. The diversity of fish has a moderate value of 1<H’<3. The obtained dominance index value is close to 0, then it is stated that there is no species found to be dominant.

scholarly journals Kelimpahan Dan Keanekaragaman Jenis Ikan di Perairan Ndalir Kabupaten Merauke, Papua

2021 ◽  
Vol 1 (2) ◽  
pp. 33-42
Author(s):  
Dandi Saleky ◽  
Efraim Weremba ◽  
Marius A. Welikken
Keyword(s):  
Relative Abundance ◽  
Fish Species ◽  
Random Sampling ◽  
Sampling Method ◽  
Diversity Index ◽  
Research Data ◽  
Dominance Index ◽  
Sampling Points ◽  
Index Value

This study aims to analyze the diversity of fish species caught on the Ndalir Coast of Merauke Regency. This research was conducted in Juli-August 2020. The determination of the sampling points at the research location used the purposive random sampling method with two observation stations. Analysis of the research data using relative abundance (Kr), Shannon-Wienner index (H '), uniformity index (E), and dominance index (C), The number of fish catches during the study time was 431 which were divided into 12 species of fish. Station two has a greater number of catches than station one. The highest relative abundance was tongue fish (Cynoglossus abbreviation) (Station I) and mullet (Mugil cephalus) (Station II). The diversity index value at the two observation stations is in the medium category. The uniformity and dominance index values ​​show that the species at the two research stations are evenly distributed with no dominating species.

scholarly journals Komposisi dan Kelimpahan Ophiuroidea dan Echinoidea di Perairan Pantai Pok Tunggal, Gunung Kidul, Yogyakarta

2020 ◽  
Vol 9 (2) ◽  
pp. 109-118
Author(s):  
Herlina Lestari Pakpahan ◽  
Irwani Irwani ◽  
Ita Widowati
Keyword(s):  
Water Quality ◽  
Community Structure ◽  
Data Analysis ◽  
Coral Reefs ◽  
Environmental Conditions ◽  
Diversity Index ◽  
Species Abundance ◽  
Temperature Data ◽  
Dominance Index ◽  
Index Value

ABSTRAK: Echinodermata merupakan salah satu komponen penting dalam keaneka ragaman fauna di ekosistem pantai. Habitat utama echinodermata adalah terumbu karang, hal ini karena terumbu karang berperan sebagai tempat berlindung dan mencari makan bagi fauna echinodermata. Salah satu penyebaran biota ini adalah di perairan rataan terumbu karang pantai selatan di pantai Pok Tunggal, Gunung Kidul, Yogyakarta. Tujuan penelitian ini adalah untuk mengetahui jenis dan struktur komunitas echinodermata di pantai Pok Tunggal,  kabupaten Gunung Kidul, Yogyakarta. Penelitian ini dilaksanakan pada bulan Juli 2019 di pantai Pok Tunggal. Metode pengambilan data kelimpahan menggunakan metode transek kuadrat berukuran 1x1 m, parameter kualitas perairan yang diukur adalah salinitas, DO, pH, serta suhu. Analisis  data meliputi identifikasi spesies, kelimpahan jenis (ind/m2), indeks keanekaragaman, indeks keseragaman dan indeks dominansi. Hasil pengamatan ditemukan beberapa spesies, dari 2 kelas filum echinodermata, antara lain 2 species dari kelas Ophiuroidea yaitu Ophiocoma erinaceus dan Ophiocoma dentata, 3 species dari kelas Echinoidea yaitu Echinometra oblonga, Echinometra mathei dan Echinothrix diadema. Hasil penelitian menunjukkan kelimpahan individu tertinggi adalah Echinometra oblonga (16,6 ind/m2) dan terendah adalah Echinothrix diadema (0,4 ind/m2). Parameter lingkungan perairan di pantai Pok Tunggal pada setiap stasiun masih menunjang kehidupan Echinodermata. Struktur komunitas echinodermata yaitu nilai indeks keanekaragaman (H‟) berkisar antara 0,667-1,198, nilai indeks keseragaman (E) berkisar antara 0,744 - 0,999 dan nilai indeks dominansi (C) berkisar berkisar 0,308 - 0,525. ABSTRACT: Echinoderms are one of important component of fauna diversity in coastal ecosystems. The main habitat of Echinoderms is coral reefs, because coral reefs act as a shelter and food for echinoderms fauna. This species distributed in the flat waters of the coral reefs of the south coast at Pok Tunggal beach, Gunung Kidul, Yogyakarta. The aim of this study was to determine the species and Community Structure of echinoderms on the Pok Tunggal beach, Gunung Kidul Regency, Yogyakarta. This research was conducted in July 2018 at Pok Tunggal Beach. Sampling was done by using transect quadrant measuring 1x1 m. Parameter of water quality was salinity, DO, pH, and temperature. Data analysis includes species abundance (ind/m2), diversity index, uniformity index and dominance index. The result showed that several species of Echinodermal phylum classes, including 2 species of Ophiuroidea class namely Ophiocoma erinaceus and Ophiocoma dentata, 3 species of Echinoidea class namely Echinometra oblonga, Echinometra mathei and Echinothrix diadema. The highest individual abundance was Echinometra oblonga (16,6 ind/m2) and the lowest was Echinothrix diadema (0,4 ind/m2). The environmental conditions of the waters at the Pok Tunggal beach at each station can support the life of echinoderms. Echinoderms community structure, namely diversity index (H ') ranges from 0,667-1,198, uniformity index (E) ranges from 0,744-0,999 and dominance index value ranges (C) ranges from 0,308-0,525.

scholarly journals Analysis Macrozoobenthos Diversity in Way Kalam Waterfall Tourism Lampung Selatan Regency

el–Hayah ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 78-86
Author(s):  
Fatika Septiarila
Keyword(s):  
Random Sampling ◽  
Diversity Index ◽  
Sampling Technique ◽  
Physical Parameters ◽  
Chemical Parameters ◽  
Dominance Index ◽  
Physico Chemical ◽  
Index Value ◽  
Physical And Chemical ◽  
Stable Community

This study aims to determine the diversity index of macrozoobenthos and determine the physico-chemical parameters that exist in Way Kalam Waterfall Tourism, South Lampung.   This type of research is descriptive quantitative, sampling was carried out at three research stations including macrozoobenthos samples and measurements of physical and chemical parameters of the waters (temperature, brightness, pH, DO, COD, and BOD) using purposive random sampling technique.  Sampling macrozoobenthos on the bottom of the water using a shovel. The results showed that the obtained macrozoobenthos consisted of 3 phyla, 4 classes, 6 orders, 9 families, and 63 individuals.  The macrozoobenthos diversity index value obtained was in the moderate category. The diversity index value is in the stable community category, and the dominance index is in the low category. The results of the measurement of physical parameters and chemical parameters showed that the waters of the Way Kalam Waterfall tour were not polluted.

scholarly journals Keragaman Plankton dan Kondisi Perairan Tambak Intensif dan Tradisional di Probolinggo Jawa Timur

Biosfera ◽  
2015 ◽  
Vol 32 (2) ◽  
pp. 83 ◽  
Author(s):  
Utojo Utojo
Keyword(s):  
Suspended Solids ◽  
Biological Diversity ◽  
Diversity Index ◽  
Cell Counting ◽  
Community Stability ◽  
Biological Index ◽  
Dominance Index ◽  
Lugol Solution ◽  
Index Value ◽  
Brackishwater Pond

This study aims to estimate the wealth and stability of traditional and intensive brackishwater pond waters through biological index calculation (diversity, uniformity and dominance of plankton) in traditional and intensive brackishwater pond waters of Probolinggo Regency, East Java Province. Sampling plankton and water from the site, considered to represent the diversity of plankton and water stability of traditional and intensive brackishwater pond. Plankton was collected using a plankton net no. 25, then preserved using 1% lugol solution. Measurement of water quality variables include temperature, salinity, dissolved oxygen and pH, whereas the laboratory analyzes that Total Organic Matter (TOM), NO2, NO3, NH3, PO4, Total Suspended Solids (TSS), and Fe. Plankton identification using microscope and calculation with cell counting method. The results of analysis of plankton in intensive brackishwater pond waters are obtained as much as 23 genera consisting of 16 genera of phytoplankton were included into three classes, namely Bacillariophyceae as much as 5 genera, Cyanophyceae 3 genera, Dinophyceae and Chlorophyceae, each of the four genera, whereas zooplankton consisting of 7 genera are included into two classes, namely Crustaceae 6 genera and Rotatoria 1 genus. In traditional brackishwater pond earned as much as 13 genera consisting of 8 genera of phytoplankton were included into Bacillariophyceae 5 genera, Cyanophyceae 2 genera, and Dinophyceae 3 genera, whereas zooplankton consisting of three genera are included into class Crustaceae 2 genera and Rotatoria 1 genus. Plankton abundance in intensive brackishwater pond ranges 702 - 4269 ind./L, diversity index of 0.26 -2.38, uniformity index of 0.10 - 1.5, and dominance index of 0.02 - 0.68. In traditional brackishwater pond have an abundance of plankton range 134 - 776 ind./L, diversity index of 0.10 - 1.97, uniformity index of 0.08 - 1.0, and dominance index of 0.01 - 0.75. Traditional and intensive brackishwater pond waters condition still within the limits that can be tolerated by the culture organism. Based on the index value of biological, diversity of genus in the intensive brackishwater pond is relatively higher than traditional brackishwater pond and the community stability moderate, whereas traditional brackishwater pond unstable. On average, the uniformity of the genus in both  brackishwater ponds are relatively evenly and genus of plankton to dominate the others genus.

scholarly journals KEANEKARAGAMAN MAKROZOOBENTOS DI SUNGAI TALAWAAN MINAHASA UTARA, SULAWESI UTARA

2015 ◽  
Vol 15 (1) ◽  
pp. 42
Author(s):  
Mentari Maith ◽  
Sendy Rondonuwu ◽  
Adelfia Papu ◽  
Marina F.O. Singkoh
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Diversity Index ◽  
Continuous Exposure ◽  
North Sulawesi ◽  
Bottom Waters ◽  
Environmental Activities

ABSTRAK Makrozoobentos merupakan hewan makroinvertebrata yang menetap di dasar perairan baik sesil, merayap maupun menggali lubang. Beberapa alasan menjadikan makrozoobentos sebagai bioindikator adalah makrozoobentos relatif diam di dasar perairan sehingga terdedah oleh air, pendedahan yang terus menerus menyebabkan makrozoobentos dipengaruhi oleh kegiatan lingkungan dan perubahan tersebut dapat mempengaruhi keanekaragamannya. Penelitian ini bertujuan untuk menganalisis keanekaragaman makrozoobentos di Sungai Talawaan. Lokasi penelitian terletak di Sungai Talawaan, Minahasa Utara, Sulawesi Utara. Penelitian ini menggunakan metode Purposive Random Sampling dengan menggunakan alat jaring surber. Total individu yang didapatkan dari 3 stasiun sebanyak 191 individu dengan jumlah ordo sebanyak 6 yang terdiri dari 14 genus. Genus makrozoobentos yang paling banyak ditemukan pada ke 3 stasiun yaitu Ephemeroptera, Tricoptera dan Coleoptera. Nilai total ke 3 Stasiun termasuk pada kelompok tercemar ringan dengan Indeks keanekaragaman > 2,0 yaitu 2,01. Kata Kunci: Makrozoobentos, Sungai Talawaan, Indeks Keanekaragaman, Minahasa Utara-Sulawesi Utara.   DIVERSITY MACROZOOBENTHOS IN TALAWAAN RIVER NORTH MINAHASA, NORTH SULAWESI ABSTRACT Macrozoobenthos is macroinvertebrate animals that live in the waters of both sessile base, edging and dig a hole. Several reasons make macrozoobenthos bioindicator is macrozoobenthos relatively silent in the bottom waters that were exposed by the water, continuous exposure causes macrozoobenthos influenced by environmental activities and these change may affect biodiversity. This study aims to analyze the diversity of macrozoobenthos in the River Talawaan. Location of the study lies in Talawaan River, North Minahasa, North Sulawesi. The study used Purposive Random Sampling method by using a surber net. Total individuals who come from 3 to as many 191 individual station with the order many as 6 which consists of 14 gems. Genus macrozoobenthos most commonly found at all 3 station are Ephemeroptera, Tricoptera and Coleoptera. The total value of all 3 stations included in the group of lightly contaminated with diversity index > 2,0 is 2,01. Keywords: Macrozoobenthos, River Talawaan, Diversity index, North Minahasa-North Sulawesi.

scholarly journals Tingkat Pencemaran Berdasarkan Saprobitas Plankton di Perairan Pelabuhan Benoa, Kota Denpasar, Provinsi Bali

2017 ◽  
Vol 4 (1) ◽  
pp. 96 ◽  
Author(s):  
Ni Putu Eva Damayanti ◽  
I Wayan Gede Astawa Karang ◽  
Elok Faiqoh
Keyword(s):  
Environmental Pollution ◽  
Primary Productivity ◽  
Random Sampling ◽  
Sampling Method ◽  
Environmental Changes ◽  
Diversity Index ◽  
Total Abundance ◽  
Saprobic Index ◽  
Evenness Index ◽  
Index Value

Plankton is organism that susceptible to environmental changes that used as indicator of environmental pollution by saprobic index because plankton has important role in affecting the water primary productivity. The research about plankton saprobic in Benoa Harbour is never done before. The aim of this research is to explain the structure of community and the level of plankton saprobic at Benoa Harbour. This research using random sampling method for determine the station. The result explained that there was 17 species of plankton in the waters of Benoa Harbor from two classes such as Bacillariophyceae, Dinophyceae on phytoplankton and from five classes such as Magnoliopsida, Malacostraca, Maxillopoda, Globothalamea and Hexanauplia on zooplankton. The total abundance of plankton ranges from 1.117.172 Individual / Liter- 1.626.163 Individual / Liter. The zooplankton diversity index in the waters of Benoa Harbor ranges from 1.06 to 1.58 and phytoplankton ranges from 1.02 to 155. This indicates that the value of diversity in all observation stations is categorized into low biodiversity. Zooplankton evenness index value in the waters of Benoa Harbor ranged from 0.73-0.88 and phytoplankton ranged from 0.71-0.96. This indicates that the index of evenness is relatively high. The dominant value of zooplankton in the waters of Benoa Harbor ranges from 0.24-0.43 and phytoplankton ranged from 0.22-0.41. This indicates that the dominance is relatively low. Saprobik Index (SI) value ranges from 1.0-1.6 and Tropic Saprobic Index (TSI) ranges from 1.76-1.96. This indicates that the waters of Benoa Harbour is categorized mild contaminated conditions until not contaminated.

scholarly journals IKTIODIVERSITAS DI SUNGAI WANGGO KAMPUNG ERAMBU DISTRIK SOTA KABUPATEN MERAUKE

2019 ◽  
pp. 56-63
Author(s):  
Edmondus K. Laratmase ◽  
Norce Mote ◽  
Edy HP. Melmambessy
Keyword(s):  
Data Analysis ◽  
Survey Data ◽  
Diversity Index ◽  
Total Catch ◽  
Evenness Index ◽  
Index Value

This study aims to determine the diversity of fish in the River Wanggo District Sota Merauke regency. This research was conducted in May-July 2017. The method used in this research is The method used is survey.  Data analysis used are Species Wealth, Diversity Index (H'), Evenness Index (E), Domination Index (D). The results of the study there are 25 species of fish with a total catch of 1,392 tails. The index value of Diversity (H ') and moderate (1.10-1.27) whereas fairness values ​​are high (2.39-2.72) and the spread of each species is evenly distributed. No fish dominates all three stations.   Keywords: Ichtiyodiversity; Wanggo River; Merauke.  

scholarly journals STRUKTUR DAN KOMPOSISI FITOPLANKTON DI BAGIAN TENGAH DAN HILIR SUNGAI SALUESEM - SULAWESI UTARA

2015 ◽  
Vol 17 (1) ◽  
pp. 111
Author(s):  
Jeane O.K Tiwow ◽  
Herni E.I Simbala ◽  
Sendy Rondonuwu ◽  
Ratna Siahaan
Keyword(s):  
Water Quality ◽  
Random Sampling ◽  
Diversity Index ◽  
Light Pollution ◽  
Phytoplankton Composition ◽  
North Sulawesi ◽  
Evenness Index

STRUKTUR DAN KOMPOSISI FITOPLANKTON DI BAGIAN TENGAH DAN HILIR SUNGAI SALUESEM - SULAWESI UTARA ABSTRAK Sungai Saluesem berasal dari Gunung Mahawu melintasi Kota Manado sebelum bermuara di Teluk Manado, Sulwesi Utara. Penelitian dilakukan di bagian tengah dan hilir Sungai Salueseum, Sulawesi Utara dari April hingga November 2014. Penelitian ini bertujuan untuk menganalis ke struktur dan komposisi fitoplankton di bagian tengah dan hilir Sungai Saluesem, Sulawesi Utara. Penelitian menggunakan metode purposive random sampling untuk menentukan lokasi penelitian. Dua stasiun penelitian disebarkan di tiap bagian sungai. Sebanyak tiga ulangan dilakukan di tiap stasiun. Total banyaknya sampel yaitu dua belas (2x2x3) sampel yang diperoleh dengan plankton net ukuran 30 mesh. Hasil penelitian menunjukkan bahwa fitoplankton yang didapatkan di bagian tengah Sungai Saluesem sebanyak 399 individu, 28 spesies dan 3 kelas.  Fitoplankton yang didapatkan di bagian hilir Sungai Saluesem sebanyak 913 individu, 26 spesies dan 4 kelas. Kelas fitoplankton yaitu Bacillariophyceae, Chlorophyceae dan Cyanophyceae dan Euglenophyceae. Kelas Bacillariophyceae merupakan kelas yang memiliki kepadatan tertinggi di bagian tengah dan hilir berturut-turut yaitu 4067 individu/m3 (81%) dan 14950 individu/m3 (95%). Indeks keanekaragaman di bagian tengah dan hilir termasuk keanekaragaman sedang dengan nilai H’ bagian tengah  (H’: 2,88) dan hilir (H’: 2,64). Distribusi species fitolankton di bagian tengah dan hilir merata dengan Indeks Kemerataan (E)  berturut-turut yaitu 0,87  dan 0,81.  Tidak ada species fitoplankton di bagian tengah yang mendominansi dengan nilai Indeks Dominansi (D) mendekati nol (0,222). Beberapa species fitoplankton di bagian hilir mendominansi dengan nilai Indeks D mendekati satu (0,544). Kualitas air Sungai Saluseum di bagian tengah dan hilir dikategorikan tercemar ringan. Kata kunci : Sungai Saluesem, struktur fitoplankton, komposisi fitoplankton, kualitas air, Sulawesi Utara. STRUCTURE AND COMPOSITION OF PHYTOPLANKTON OF MIDDLE AND DOWNSTREAM SALUESEUM RIVER, NORTH SULAWESI ABSTRACT Saluesem River originated from Mahawu Mount crosses the Manado City before down to Manado Bay, North Sulwesi. The study was conducted in the middle and lower part of Salueseum River, North Sulawesi from April to November 2014. This study aims to analyze the structure and composition of the phytoplankton at the middle and lower part of the River Saluesem, North Sulawesi. Research used purposive random sampling to choose researc locations. Two research stations were distributed in each part of the river. A total of three replications performed at each station. The total number of samples that were twelve (2x2x3) samples by plankton net 30 mesh. The results showed that phytoplankton at the middle as 399 individuals, 28 species and 3 classes. Phytoplankton were at down as 913 individuals, 26 species and 4 classes i.e.  Bacillariophyceae, Chlorophyceae and Cyanophyceae and Euglenophyceae. Bacillariophyceae has the highest density at the middle and downstream respectively were 4067 individuals/m3 (81%) and 14950 individuals/m3 (95%). Diversity index (H’) at middle and downstream were classified into middle diversity with index respectively 2.88 and 2.64. Evenness index (E) at middle and down respectively were 0.87 and 0.81 showed that phytoplankton distributed equally. Some species at middle were dominant (D:0.222) but not at downstream (D: 0,544). Water quality of middle and downstream Saluseum River were classified into light pollution. Keyword: Saluesem River, structure phytoplankton, composition phytoplankton, water quality, North Sulawesi.

scholarly journals Abundance and Diversity of Diatom Class Bacillariophyceae as Bioindictaor of Pollution in the Waters of Tanjung Luar Fish Landing Based

2021 ◽  
Vol 20 (3) ◽  
pp. 525
Author(s):  
Niswatul Audah ◽  
Lalu Japa ◽  
M. Yamin
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Diversity Index ◽  
Similarity Index ◽  
Pollution Level ◽  
Dominance Index ◽  
Systematic Random Sampling ◽  
Species Similarity ◽  
Sample Points ◽  
Abundance And Diversity

Tanjung Luar is coastal water used as a waste disposal area for Fish Landing Based (FLB) activities. However, the condition of the waters with phytoplankton as a bioindicator has never been reporting. This research aims to know Bacillariophyceae in terms of abundance, diversity, and measurement of environmental pollution variables. Methods Sampling at the study location was determined by a systematic random sampling method. Data analysis Bacillariophyceae were determined using formula abundance, diversity index, and dominance index. The index of similarity of species between sample points was determined based on the Bray-Curtis Cluster Analysis. Furthermore, the results showed an abundance of Bacillaryophyceae of 322,000 individuals / L classified as low, the diversity index of Bacillariophyceae of 2.162 classified as moderate, and a dominance index of 0.138 (without dominating species). The results showed that the highest species similarity index was between sample points II and III (57.9%), and the lowest species similarity index between sample points I and II was 23.7%. Water pollution on the waters of PPI Tanjung Luar is classified as moderate pollution level and oligotrophic fertility.

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