scholarly journals Struktur Komunitas dan Keanekaragaman Makrobentos di Perairan Teluk Jakarta

2021 ◽  
Vol 14 (1) ◽  
pp. 115-126
Author(s):  
Diah Anggraini Wulandari ◽  
Ernawati Widyastuti ◽  
Ismiliana Wirawati ◽  
Riyana Subandi
Keyword(s):  
Sampling Method ◽  
Diversity Index ◽  
Biological Indicators ◽  
Industrial Sector ◽  
H Index ◽  
Species Dominance ◽  
The North ◽  
Index Value ◽  
Polluted Waters

AbstrakTeluk Jakarta di perairan Laut Jawa terletak di sebelah utara Provinsi DKI Jakarta memiliki potensi sangat besar baik sumber daya perairannya maupun sebagai pusat aktivitas dan jasa-jasa lingkungan. Potensi pusat aktivitas meliputi sektor industri, perhubungan, perdagangan, perikanan, pariwisata, dan kependudukan. Namun kondisi perairan Teluk Jakarta semakin lama semakin kritis. Kondisi ini berpengaruh terhadap biota makrobentos seperti Mollusca, Crustacea, Echinodermata, dan Polychaeta. Penelitian ini bertujuan untuk mengetahui struktur komunitas makrobentos dan status pencemaran perairan Teluk Jakarta berdasarkan indikator biologis. Metode pengambilan sampel menggunakan Grab Smith McIntyre sebanyak tiga kali ulangan pada 9 lokasi yang berbeda. Sampel dianalisis untuk memperoleh keanekaragaman dan struktur komunitas makrobentos, indeks keanekaragaman (H’), indeks kemerataan jenis (J’), serta kualitas perairan Teluk Jakarta. Hasil menunjukkan perairan Teluk Jakarta didominasi oleh Polychaeta dengan persentase 53% (422 individu), Mollusca 33%, Crustacea 13%, dan Echinodermata 1% dengan total individu makrobentos, yaitu 793 individu. Kelimpahan makrobentos paling tinggi, yaitu Mollusca jenis Ennucula sp. (186 individu), Crustacea jenis Apseudes sp. (41 individu), dan Echinodermata jenis Aphiuridae (3 individu). Keanekaragaman jenis di perairan Teluk Jakarta termasuk kategori sedang dengan H indeks 1–2, kondisi perairan tercemar sedang, dan indeks kemerataan jenis (J’) makrobentos tinggi dengan nilai indeks >0,75 yang menunjukkan tidak adanya dominansi spesies. Abstract Jakarta Bay is located in the north of DKI Jakarta Province which has enormous potential in its water resources and as a center for environmental services. The center services include the industrial sector, transportation, trade, fisheries, tourism, and population. However, Jakarta Bay waters have suffered critical damage. This condition affects on macrobenthos such as Molluscs, Crustaceans, Echinoderms, Polychaete so the aims of this study is to determine the diversity pollution status of Jakarta Bay based on biological indicators. The sampling method use Grab Smith McIntyre with three replications in 9 different locations. Samples were analyzed to determine the diversity and structure community of macrobenthos, diversity index (H'), index of Evenness (J’) and the water quality of Jakarta Bay based on biological indicators. The results show that Jakarta Bay waters are dominated by Polychaete with a percentage of 53% (422 individuals), mollusks 33%, Crustaceans 13%, and Echinoderms 1% with a total of 793 individuals. Crustaceans consist of 23 species which are dominated by Apseudes sp. Mollusks consist of 265 individuals dominated by Ennucula sp and Echinoderms dominated by Amphiuridae. The level of species diversity in the waters of Jakarta Bay is included in the moderate category with H index 1–2, with moderate polluted waters, and the evenness index (J’) is in the high category with an index value >0,75. It indicate the absence of species dominance.

scholarly journals Phytoplankton Diversity as Bioindicator of Pandanduri Dam Waters, East Lombok Regency

2020 ◽  
Vol 20 (3) ◽  
pp. 355
Author(s):  
Lalu Hasan Nasirudin Zohri ◽  
Agil Al Idrus ◽  
Lalu Japa
Keyword(s):  
Water Quality ◽  
Sampling Method ◽  
Phytoplankton Community ◽  
Diversity Index ◽  
Quality Change ◽  
Species Diversity Index ◽  
Phytoplankton Diversity ◽  
Essential Function ◽  
Index Value

Pandanduri Dam waters has an essential function for the community made the activities of the surrounding community inseparable from the Pandanduri Dam that made potentially quality change of the Pandanduri Dam waters. Good water quality is an important requirement for humans that made water quality research is essential to be done. Human activities will affect environmental factors such as biological parameters, especially phytoplankton, which are indicators of water quality. The aim of this study was to analyzed water quality of Pandanduri Dam through study of phytoplankton community and diversity. Sample sites were determined based on haphazard sampling method and phytoplankton data were analyzed based on the shannon-weiner diversity index. The results showed that the phytoplankton community identified in Pandanduri Dam consisted of 5 classes, 13 orders, and 31 species with  species diversity index of 2,659. Based on fitoplankton diversity index value the water of  Pandanduri Dam was in lightly polluted category. It is suggested to more detailed studies should be undertaken especially on species that produce toxins over a longer time scale.

scholarly journals Struktur Komunitas Fitoplankton di Perairan Pesisir Pulau Siantan Kabupaten Kepulauan Anambas Provinsi Kepulauan Riau

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Lani Puspita ◽  
Notowinarto Notowinarto ◽  
Rudi Gunawan
Keyword(s):  
Community Structure ◽  
Coastal Area ◽  
Diversity Index ◽  
Natural Food ◽  
Species Dominance ◽  
Sampling Locations ◽  
Level Data ◽  
Dominance Level ◽  
Index Value ◽  
Sampling Times

Phytoplankton as a producers  and natural food for fish have an important role in aquatic ecosystems, thus indirectly affecting the availability of fish catches. The research was conducted at Siantan Island Coastal Area Anambas Islands District Riau Islands Province. This coastal area is one of the fishing grounds in Anambas Island. This study aims to analyze the community structure of phytoplankton at Siantan Island Coastal Area Anambas Islands District Riau Islands Province. Sampling was conducted during March and April 2012. Community structure parameters analyzed include Species Diversity Level, Species Uniformity Level, and Species Dominance Level. Data were analyzed spatially and temporally. Similarity between the sampling locations was conduted by Multivariate Analysis - Cluster. Results of data analysis showed that the phytoplankton of Bacillariophyceae Class found in the most abundant amount. Diversity Index Value indicates that the level of phytoplankton plankton community in a state of moderate. Species Uniformity Index Value and Species Dominance Index Value indicates that phytoplankton in the three sampling locations are generally in a state of uniform and no one dominates. All three sampling locations have relatively the same condition and between sampling times (morning, afternoon, and evening) are also not very different condition. Keywords: phytoplankton, coastal, Anambas Islands  

scholarly journals The Influence of Accountability, Work Experience and Professionalism on The Quality of The Quality of The Work of Auditors

2020 ◽  
Vol 4 (3) ◽  
pp. 449-459
Author(s):  
Sihol Marito Simorangkir ◽  
Jonathan Dubery Bukit ◽  
Keumala Hayati
Keyword(s):  
Work Experience ◽  
Sampling Method ◽  
Financial Statements ◽  
The North ◽  
Sample Technique ◽  
Saturated Sample ◽  
High Level ◽  
North Sumatra ◽  
Regression Tests

The study was conducted aimed at examining the effect of accountability, work experience, and professionalism on the quality of auditor performance. auditors are required to have a high level of accountability because the auditor will present financial statements that must be accountable by himself. In addition to having a high accountability the auditor should also have good work experience so that the auditor can convey a logical and logical understanding of the errors contained in the financial statements. And auditors also require high professionalism so that auditors can carry out professional and good tasks. The object of research is the auditor who is working at the North Sumatra BPKP Office. The data is 70 respondents. The sampling method is the saturated sample technique. Analyze the data using validity, reliability and linear regression tests. And the results of the study prove that accountability has an influence on the quality of the work of the auditor, while work experience and professionalism do not have an influence on the quality of the work of the audiores.

scholarly journals Analysis of Gastropod Diversity as a Bioindicator of Waters in Situ Ciburuy Padalarang, West Bandung Regency, West Java, Indonesia

2021 ◽  
pp. 10-19
Author(s):  
Erwin Theofilius ◽  
Zahidah Hasan ◽  
Asep Agus Handaka ◽  
Herman Hamndani
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
Sampling Method ◽  
Diversity Index ◽  
Research Area ◽  
Survey Method ◽  
Gastropod Species ◽  
Evenness Index

This study conducted to determine the water quality of Situ Ciburuy based on the structure of the gastropod community as a bioindicator. The survey method used in this study based on collecting data directly at the research area (purpose sampling method).  For instance, species and density of gastropods were descriptively analyzed, using diversity index and evenes index. For instance, The findings showed that level of water quality in  Situ Ciburuy based on gastropods bioindicators was lightly polluted. That is indicated by the low to moderate diversity of gastropods, which ranges from 1.31-1.98. The Shannon evenness index (0,73-0.95) revealed low gastropod species diversity in Situ Ciburuy, indicating low evenness of gastropod in Situ Ciburuy.

scholarly journals ANALISIS KUALITAS PERAIRAN BERDASARKAN KOMPOSISI DAN KELIMPAHAN FITOPLANKTON DI SUNGAI LANANGAN, KLATEN

2018 ◽  
Vol 7 (3) ◽  
pp. 253-262
Author(s):  
Faudzi Ath Tho Azzam ◽  
Niniek Widyorini ◽  
Bambang Sulardiono
Keyword(s):  
Sampling Method ◽  
Phytoplankton Community ◽  
Diversity Index ◽  
Animal Husbandry ◽  
Open Water ◽  
Survey Method ◽  
Purposive Sampling ◽  
Freshwater Aquaculture ◽  
Range Of Values

Sungai Lanangan merupakan bagian hulu Sungai Bengawan Solo yang terletak di Desa Daleman, Kecamatan Tulung, Kabupaten Klaten. Jenis limbah seperti limbah domestik, industri, pertanian, perikanan dan peternakan telah mencemari Sungai Lanangan. Limbah organik dari industri tepung aren dan mie soun yang dibuang di Sungai Lanangan mencapai 50 ton limbah per hari. Hal tersebut menyebabkan perubahan kualitas air dan komposisi fitoplankton di Sungai Lanangan.Penelitian ini dilakukan dari bulan Januari - Februari 2018 di Sungai Lanangan. Tujuan dari penelitian ini adalah untuk mengetahui kelimpahan dan komposisifitoplankton serta mengetahui kualitas perairan berdasarkan struktur komunitas fitoplankton di Sungai Lanangan tersebut. Penelitian ini menggunakan metode survei denganpengambilan sampel menggunakan metode purposive sampling. Frekuensi pengambilan sampel dilakukan setiap 1 minggu sekali selama 3 minggu. Sampel diambil dari 3 stasiun, dimana stasiun 1 dengan karakteristik perairan terbuka; Stasiun 2 dengan karakteristik dekat industri pengolahan tepung aren; dan stasiun 3 dengan karakteristik dekat dengan daerah budidaya air tawar.Hasil penelitian didapatkan 11 genera fitoplankton yaitu dari kelas Bacillariophyceae (4 genera), Cyanophyceae (2 genera), Chrysophyceae (1 genus), Ulvophyceae (2 genera), Zygnematophyceae (1 genus) dan Chlorophyceae (1 genus). Kelimpahan rata-rata fitoplankton tertinggi terdapat pada stasiun 2 dengan kelimpahan 1.989 ind/l yang didominasi oleh genus Oscillatoria. Indeks keanekaragaman rata-rata pada setiap stasiun adalah 1,68 pada stasiun 1; 1,63 pada stasiun 2; dan 1,52 pada stasiun 3. Dari hasil indeks keanekaragaman yang didapatkan tersebut menunjukkan kisaran nilai antara 1,52 hingga 1,68 yang berarti bahwa kualitas perairan Sungai Lanangan tercemar ringan.  Lanangan river is one upstream of Bengawan Solo river which located at Daleman, Tulung, Klaten. types of waste such as domestic waste, industrial waste, agriculture, fishery and animal husbandry polluted Lanangan river. Especially organic waste from palm starch and soun noodle industry that are dumped in the Lanangan river reaches 50 tonnes waste per day. This research was conducted from January to February 2018 in the Lanangan river. The purpose of this research is to find out the abundance and composition of phytoplankton; and to determine the water qualitybased on the structure of the phytoplankton community in Lanangan river. This research uses survey method and use purposive sampling method. The Frequency of sampling is done once a week for 3 week. The samples taken from 3 stations, where station 1 is open water; Station 2 is near palm starch and soun noodle industry; and station 3 is close to freshwater aquaculture area.The resultsof the research found 11 genus of phytoplankton in class Bacillariophyceae, Cyanophyceae, Chrysophyceae, Ulvophyceae, Zygnematophyceae and Chlorophyceae. The highest average of phytoplankton abundance found in station 2 with 1,989 ind/l which is dominated by the genus of Oscillatoria. The average diversity index each station is 1.68 at station 1; 1.63 at station 2; and 1.52 at station 3. From the results obtained the diversity index indicates the range of values between 1.52 to 1.68 which show that the water quality of Lanangan River is lightly to moderate polluted.  

scholarly journals The diversity of plankton as bioindicators in Kakap River Estuary, West Kalimantan

DEPIK ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 174-179
Author(s):  
Widadi Padmarsari Soetignya ◽  
Patrisia Marniati ◽  
Mardan Adijaya ◽  
Yunita Magrima Anzani
Keyword(s):  
Relative Abundance ◽  
Environmental Changes ◽  
Diversity Index ◽  
River Estuary ◽  
West Kalimantan ◽  
Abundance And Diversity ◽  
Index Value ◽  
Plankton Diversity ◽  
Research Period

Kakap River Estuary plays an essential role in the life organisms, but it is vulnerable to environmental changes and pollution caused by human activities. This study aims to assess the presence of plankton species, their abundance and diversity as aquatic ecological bio-indicators in Kakap River Estuary. Plankton and water samples were taken for three months, with a frequency of one sample per month, viz. in March, April and June 2020 from four sampling stations in Kakap River Estuary, West Kalimantan. A total of 34 species of plankton were observed from all sampling sites, and identified to belong to 18 classes. Chlorophyceae had the highest relative abundance among the phytoplanktons (40.10%), followed by Bacillariophyceae (21.86%) and Cyanophyceae (19.28%). Oscillatoria sp. and Hydrodictyon sp. were the most dominant phytoplankton species. There were 8 classes of zooplankton identified from all sampling stations throughout the research period. Hexanauplia had the highest relative abundance among the zooplanktons (36.56%) followed by Euglenophyceae (24.37%). The plankton diversity index (H ′) values ranged between 2.33 -3.11. The plankton evenness index value ranged from 0.79 to 0.89 which indicates high plankton evenness at all samping stations, and this is supported by a low dominance index value at all stations ranging from 0.06-0.16. Station 1 had high Shannon-Wienner diversity index score, while for station 2, 3, 4, their scores were in the moderate level. Overall. the diversity index of the plankton from all sampling sites indicated that the quality of the water had no pollution to light pollution level.Keywords:PhytoplanktonZooplanktonWater quality

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 FAKTOR-FAKTOR YANG MEMENGARUHI TINGKAT KEPATUHAN WAJIB PAJAK ORANG PRIBADI DI KPP WILAYAH JAKARTA UTARA

Media Bisnis ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 65-76
Author(s):  
JULIANI JULIANI ◽  
RIAN SUMARTA
Keyword(s):  
Quality Of Service ◽  
Sampling Method ◽  
Behavioral Control ◽  
Simple Random Sampling ◽  
Perceived Behavioral Control ◽  
Moral Obligations ◽  
Environment Quality ◽  
The North ◽  
Level Of Understanding

This study aims to obtain empirical evidence of understanding of taxpayers, taxpayer awareness, taxes sanction, taxpayer environment, quality of service, moral obligations and perceived behavioral control of taxpayer compliance. The use of the method in this study is causality research method. The population in this study is an individual taxpayer that registered in North Jakarta Tax Office. Sampling in this study used a simple random sampling method with a total of 103 respondents. The results of this study concluded that understanding of taxpayers, taxes sanction and moral obligations has an influence on the compliance of individual taxpayers registered in the North Jakarta Tax Office. In the sense that the higher the level of understanding of the taxpayer, the firmer the tax sanctions and the better the moral obligations, the higher the level of compliance of individual taxpayers. While taxpayer awareness, taxpayer environment, quality of service and perceived behavioral control do not affect the compliance of individual taxpayers registered in North Jakarta Tax Office.

scholarly journals Ecological Parameters as the Basis of Bivalvia Management in the Peace Ecosystem in Ponelo District, Islands North Gorontalo District

2020 ◽  
pp. 141
Author(s):  
Riskawati Nento ◽  
Hasim Hasim ◽  
Ramli Ramli
Keyword(s):  
Sampling Method ◽  
Diversity Index ◽  
Observation Point ◽  
Linear Quadratic ◽  
Thalassia Hemprichii ◽  
A Value ◽  
Sampling Locations ◽  
Seagrass Ecosystems ◽  
Ecological Parameters ◽  
Index Value

Ponelo Islands is an important area to be developed with the economic potential of fisheries and marine resources. This research was conducted in May-September 2019 aimed to find out Ecological Parameters as the Basis of Bivalvia Management in Seagrass Ecosystems. The sampling method is done by using the method used in determining the observation point is the linear quadratic transect method with sampling bivalves determined intentionally with a systematic perpendicular direction using a transect measuring 1x1 m. All bivalves contained in transects / quadrants are counted and identified. The sampling locations were divided into 4 (four) stations, namely Station I (Otiola Village), Station II (Ponelo Village), Station III (Malambe Village), and Station IV (Tihengo Village). Observations at the study site found several types of seagrass ecosystems including Enhalus acoroides, Halodule pinifolia, Thalassia hemprichii, and Cymodocea raotundata. Furthermore, 8 (eight) types of bivalves were found which were divided into 4 (four) stations in Ponelo Islands, namely Isognomon isognomum, Pinna muricata, Semele crenulata, Tellina virgata, Trachycardium subrugosum, Spondylus tenellus, Tapes sulcarius, Anadara pilula. The highest abundance index value is Tellina virgata found in Otiola Village with a value of 77.78%. The dominance index value for the highest is in Ponelo Village with a value of 0.88 in the high category. diversity index (D') with a value of 0.63 found in the medium category Malambe village. Keywords: Bivalvia, Seagrass, Abundance, Dominance, Diversity

scholarly journals KEANEKARAGAMAN JENIS BINTANG LAUT DI PANTAI BAHOWO KECAMATAN BUNAKEN KOTA MANADO SULAWESI UTARA

PHARMACON ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 65
Author(s):  
Putri Binambuni ◽  
Marnix Langoy ◽  
Deidy Y Katili
Keyword(s):  
Sampling Method ◽  
Diversity Index ◽  
Wealth Index ◽  
High Water ◽  
Line Transect ◽  
Sea Star ◽  
Sea Stars ◽  
North Sulawesi ◽  
Index Value ◽  
Method Analysis

ABSTRACT Indonesia's territory has high water resources such as fauna diversity. One animal example from the Phylum Echinodermata Class Asteroidea. This is supported by the presence of sand, seagrass and coral reef habitats. Asteroidea is a inhabitant of shallow waters and is commonly found in seagrass beds and coral reefs. This study aims to analyze the diversity of sea star species in Bahowo Beach, Bunaken District, Manado City, North Sulawesi. The sampling method used in this study is the line transect and squared method. Analysis of the data used is Relative Abundance (KR), Diversity Index (H '), Evenness Index (e), and Wealth Index (R). The results of the study found 5 species with a total of 73 individuals. Diversity index value is H '= 1.23 and shows the results of moderate diversity. Keywords: Diversity of Types of Sea Stars in Bahowo Beach, Bunaken District, Manado City, North Sulawesi.  ABSTRAK Wilayah Indonesia memiliki sumber daya perairan yang tinggi seperti keanekaragaman fauna. Salah satu contoh hewan dari Filum Echinodermata Kelas Asteroidea. Hal ini didukung oleh keberadaan habitat pasir, padang lamun, dan terumbu karang. Asteroidea adalah penghuni perairan dangkal dan umumnya terdapat di padang lamun dan terumbu karang. Penelitian ini bertujuan untuk menganalisis keanekaragaman jenis bintang laut yang ada di Pantai Bahowo, Kecamatan Bunaken, Kota Manado, Sulawesi Utara. Metode pengambilan sampel yang diigunakan dalam penelitian ini adalah metode garis transek dan kuadrat. Analisis data yang digunakan yaitu Kelimpahan Relatif (KR), Indeks Keanekaragaman (H’), Indeks Kemerataan (e), dan Indeks Kekayaan (R). Hasil penelitian didapatkan 5 spesies dengan jumlah 73 individu. Nilai indeks keanekaragaman yaitu H’= 1,23 dan menunjukkan hasil keanekaragaman sedang. Kata Kunci: Keanekaragaman Jenis Bintang Laut di Pantai Bahowo, Kecamatan Bunaken, Kota Manado, Sulawesi Utara.

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