scholarly journals Pengaruh Perbedaan Intensitas Cahaya Terhadap Kelimpahan Arthropoda di Perairan Desa Tambakpolo, Demak

2020 ◽  
Vol 9 (1) ◽  
pp. 9-12
Author(s):  
Arrico Fathur Yudha Bramasta ◽  
Wilis Ari Setyati ◽  
Ria Azizah Tri Nuraini
Keyword(s):  
Light Intensity ◽  
Food Web ◽  
Trophic Level ◽  
Aquatic Ecosystems ◽  
Sampling Method ◽  
Purposive Sampling ◽  
Composition And Structure

ABSTRAK: Zooplankton merupakan organisme laut yang memiliki peran dalam rantai makanan di laut. Zooplankton berperan pada tingkat energi kedua yang menghubungkan produsen (fitoplankton) dengan konsumen tingkat tinggi. Penelitian ini bertujuan untuk mengetahui komposisi dan struktur komunitas Arthropoda dengan dua perbedaan intensitas cahaya (300 lux dan 2000 lux). Penelitian ini dilakukan menggunakan metode purposive sampling yang terdiri dari tiga stasiun. Pengambilan sample zooplankton dilakukan dengan bantuan plankton net yang ditarik kapal tiga kali pengulangan. Berdasarkan penelitian ditemukan 5 genus yaitu Calanus, Paracalanus, Sergia, Eucalanus dan Candacia. Genus yang paling banyak ditemukan adalah Calanus dan Sergia. Kelimpahan Arthropoda tertinggi terdapat pada Stasiun 1 dengan intensitas 2000 lux sebesar 8.492 ind/L dan terendah pada Stasiun 3 dengan intensitas 300 lux sebesar 2.286 Ind/L, hal ini diduga karena pengaruh gaya fototastik positif dari fitoplankton terhadap sumber cahaya yang direspon baik oleh zooplankton khususnya Arthropoda sebagai sumber makanan. Tingkat keanekaragaman (H’) Arthropoda di perairan tersebut termasuk dalam kategori rendah, indeks keseragaman (E) dalam kategori rendah, dan terdapat dominansi (C). ABSTRACT: Zooplankton are those organisms which have a role in  food-web in aquatic ecosystems. Zooplankton as second trophic level organism whose connects producers (phytoplankton) with consumers at a higher trophic level. This research aims to know the composition and structure of the Arthropode community with two differences in light intensity (300 lux and 2000 lux). This research was done by using purposive sampling method which consists of three stations, by using a plankton net that was pulled by the boat. The results of the study found five genera namely Calanus, Paracalanus, Sergia, Eucalanus, Candacia. The most common genera are Calanus and Sergia. The highest abundance of Arthropode at Station 1 with an intensity 2000 lux is 8.492 ind/L and the lowest at Station 3 with an intensity 300 lux is 2.286 Ind/L. The level of diversity (H') of Arthropode categorized as low, the index of uniformity (E) is categorized medium, the level of dominance (C) is classified as high.

scholarly journals Diversity and Distribution of Myrmecophytes in Bengkulu Province

2017 ◽  
Vol 9 (2) ◽  
Author(s):  
Safniyeti Safniyeti ◽  
Sulistijorini Sulistijorini ◽  
Tatik Chikmawati
Keyword(s):  
Principal Component Analysis ◽  
Light Intensity ◽  
Medicinal Plant ◽  
Sampling Method ◽  
Abiotic Factors ◽  
Principal Component ◽  
Local People ◽  
Basic Information ◽  
Purposive Sampling ◽  
Additional Income

<p>Myrmecophyte is a common medicinal plant used by local people in Indonesia for treating various diseases especially in Papua. Bengkulu province is one of the myrmecophyte habitats, but there has no report on its identity and distribution. The objectives of this research were to identify the diversity and analyze the myrmecophytes distribution as well as factor affecting its presence. This study used purposive sampling method by exploring the area where myrmecophytes commonly found. The myrmecophyte distribution was analyzed using <em>Morishita</em> index and <em>Arcgis</em> 10.1, and the autecological analysis of abiotic factors was performed using <em>Principal Component Analysis</em> (PCA) generated from Minitab 16. The results of this research showed that there were two species of myrmecophytes in Bengkulu province, namely <em>Hydnophytum formicarum</em> and <em>Myrmecodia tuberosa</em>, as well as two variants of <em>M. tuberosa</em> i.e. <em>M. tuberosa</em> 'armata’ and <em>M. tuberosa</em> 'siberutensis'. The distribution of myrmecophytes was mostly randomly scattered in Central Bengkulu regency, Seluma, North Bengkulu, South Bengkulu, and Kaur. Their distributions were affected by light intensity and temperature. The data of this research can be used as basic information for carried out conservation efforts in Bengkulu province. The abundance of myrmecophytes is also used as a source of additional income for local people in Bengkulu province.      </p>

scholarly journals KEANEKARAGAMAN DAN POLA DISTRIBUSI GASTROPODA MANGROVE DI TELUK PANGPANG BLOK JATI PAPAK TN ALAS PURWO BANYUWANGI

2021 ◽  
Vol 4 (01) ◽  
pp. 33-46
Author(s):  
Lina Susanti ◽  
Fuad Ardiyansayh ◽  
Hasyim As'ari
Keyword(s):  
Distribution Pattern ◽  
Trophic Level ◽  
Mangrove Forest ◽  
National Park ◽  
Sampling Method ◽  
Random Distribution ◽  
Distribution Patterns ◽  
Purposive Sampling

The gastropods diversity have a role towards stability ecosystem in trophic level. The existence gastropods really take effect for other organism the trophic level higher than gastropods. The purpose of was to determine the value  of diverity and distribution patterns of gastropods in the mangrove forest, Jati Papak Block National Park Alas Purwo. The method used in this research is by using purposive sampling method. Sampling was divided into three stations with a range of 250 m from each station.Each station is 220 m of long and 96 m of wide with a plot measuring 2 × 2 m2. The result obtained 8 families of Gastropods with 13 genus and 19 species. Gastropods diversity ranges from H`=1.387-1.359 which indicates that the area has a moderate diversity value. The distribution pattern of gastropods between location has two distribution patterns, namely clustered and random distribution patterns

scholarly journals Komposisi dan Struktur Komunitas Zooplankton di Danau Diatas, Sumatera Barat

2018 ◽  
Vol 4 (2) ◽  
pp. 10-15
Author(s):  
Sulis Setiawati ◽  
Izmiarti Izmiarti ◽  
Nofrita Nofrita
Keyword(s):  
Community Structure ◽  
Sampling Method ◽  
Diversity Index ◽  
Similarity Index ◽  
Population Diversity ◽  
Research Station ◽  
Zooplankton Species ◽  
Purposive Sampling ◽  
Composition And Structure

Penelitian tentang komposisi dan struktur komunitas zooplankton pada di Danau Diatas, Solok Sumatera Barat telah dilakukan pada bulan April sampai September 2016. Penelitian ini bertujuan untuk mengetahui komposisi dan struktur komunitas zooplankton di Danau Diatas kabupaten Solok, Sumatera Barat. Penelitian ini menggunakan metoda Purposive Sampling di empat stasiun. Sampel Zooplankton diambil menggunakan pompa air Alkon dan planktonnet.  Zooplankton yang didapatkan 44 spesies dengan komposisi Protozoa 5 spesies, Rotifera 22 spesies, Cladocera 13 spesies, dan Copepoda 4 spesies. Kepadatan total 20683,58 ind/l. indeks diversitas di Danau Diatas yaitu berkisar 1,043 -1,45. Indeks equitabilitas berkisar 0,31-0,54. Berdasarkan strata indeks equitabilitas berkisar 0,42-0,52, dan komunitas antar stasiun relatif seragam dengan indeks similaritas 53,06-61,53%. Study of composition and community structure zooplankton of Diatas Lake, Solok District, West Sumatera, from April until September 2016. The purpose of this research was to know the composition and structure of zooplankton. The research was conducted by using Purposive Sampling method with four research station. the samples by using water pomp machine and plankton net. The result showed that zooplankton it was found 44 zooplankton species with composition of Protozoa 5 species, 22 species of Rotifers, 13 species of Cladocera, and 4 species Copepods. The population diversity average 1723,6 ind/l.  diversity index (H’) ranged from 1,04 – 1,45, Equitability index (E) ranged from 0,31-0,54, Sorensen Similarity index ranged from 53,06 – 61,53 %.  

KOMPOSISI DAN STRUKTUR KOMUNITAS ZOOPLAKTON DI DANAU TALAGA, SULAWESI TENGAH

Biocelebes ◽  
2020 ◽  
Vol 14 (3) ◽  
pp. 210-216
Author(s):  
Melisa Melisa ◽  
Asri Pirade Paserang
Keyword(s):  
Community Structure ◽  
Sampling Method ◽  
Diversity Index ◽  
Zooplankton Abundance ◽  
Dominance Index ◽  
Dominant Type ◽  
Purposive Sampling ◽  
Composition And Structure ◽  
Central Sulawesi

Study of composition and community structure of zooplankton in Talaga Lake was conducted from February to March 2019. The aimed of this research was to know the composition and structure of zooplankton in Talaga lake, Central Sulawesi. Samples were collected at four station by using purposive sampling method. The identification results have found 4 genus of zooplankton with each composition 71 % of Cyclops, 22 % of Daphnia, 0,34 % of Paramecium and 6,64 % of Chaoborus. The zooplankton abundance is around 11.6-17.2 ind/l. Community structure of zooplankton in Talaga Lake is unstable which shows by the low value of diversity index (0.68 to 0.8) and uniformity index (0,49-0,57). The value of dominance index which is in range 0.51-0.58 has also shown that there is dominant type of zooplankton.

Distribution of Periphyton in the Upstream Section of Citarum River, West Java, Indonesia

2020 ◽  
Vol 5 (1) ◽  
pp. 23-32
Author(s):  
Isma Noviana ◽  
Tri Dewi Kusuma Ningrum Pribadi ◽  
Keukeu Kaniawati Rosada
Keyword(s):  
Land Use ◽  
Food Web ◽  
Trophic Level ◽  
Aquatic Ecosystems ◽  
Aquatic Organisms ◽  
Vital Role ◽  
Total Abundance ◽  
Sampling Points ◽  
Upstream Part ◽  
Big Rivers

Periphyton indeed plays an undeniably vital role as primary producers in the food web within aquatic ecosystems such as rivers. The existence of periphyton will affect the populations of the aquatic organisms at higher trophic level, thus it is interesting to be explored, especially in big rivers like Citarum. This study aimed to explore the distribution of periphyton, including its types and abundance at several stations in the upstream part of Citarum River based on the land use in the riverbanks, in the dry season of 2018. Samples were taken at nine stations, namely Gunung Wayang Springs, Outlet Cisanti at the valley of Mount Wayang, and the connecting tributaries as follows: Cihejo, Cibuni, Cirasea, Cikaro, Cisangkuy, Cikapundung, and Ciwidey. Samples of periphyton were taken from the substrate of stone, wood, plastic, and macrophytes at three sampling points of each station. Periphyton samples were then scraped off from the surface of the substrate, where the deposit would then be filtered using plankton net No.20, preserved with Lugol 1% and subsequently identified. The results showed there were 83 species from 58 genera of both phytoperiphyton and zooperiphyton, classified as periphyton found on the sites. The total abundance of phytoperiphyton ranged between 2.3 x 104 ind/m2 and 1.3 x 108 ind/m2 where the total abundance of zooperiphyton covered from 4.7 x 102 ind/m2 to 3.7 x 105 ind/m2. The highest and the lowest numbers of total abundance of periphyton were shown at stations of Gunung Wayang Spring and Cirasea tributary, respectively. 

ENGARUH PEMAHAMAN AKUNTANSI DAN KETENTUAN PERPAJAKAN SERTA TRANSPARANSI DALAM PAJAK TERHADAP KEPATUHAN WAJIB PAJAK ORANG PRIBADI USAHAWAN PADA UKM DI YOGYAKARTA

MODUS ◽  
2016 ◽  
Vol 27 (1) ◽  
pp. 41 ◽  
Author(s):  
Sumianto Sumianto ◽  
Ch Heni Kurniawan
Keyword(s):  
Tax Policy ◽  
Sampling Method ◽  
Tax Compliance ◽  
Likert Scale ◽  
Multiple Regressions ◽  
Purposive Sampling ◽  
Analysis Tools ◽  
Survey Approach

This study aims to determine the efect of understanding of accounting and tax provisions and the tax transparency on tax compliance. This research was conducted on individual taxpayers SMEs in Yogyakarta. This study used a survey approach as collecting data method. The sample in this study was taken using purposive sampling method. Subjects in this study are individual taxpayers, particularly SMEs in Yogyakarta. Multiple regressions with Likert scale measurement were used as the analysis tools. One hundred respondents individual taxpayers entrepreneurs, especially SMEs in Yogyakarta were used as the respondents and the fnding of this study is that the understanding of the accounting and tax provisions comprehension positive efect on tax compliance. Researchers also found that transparency does not afect the taxpayer compliance.Key Words : Accounting Comprehension , Tax Policy, Transparency, Compliance

Pengaruh Ukuran Perusahaan, Profitabilitas, Solvabilitas, dan Ukuran Kantor Akuntan Publik terhadap Audit Delay

2018 ◽  
Vol 9 (2) ◽  
pp. 33-49
Author(s):  
Karina Harjanto
Keyword(s):  
Data Analysis ◽  
Linear Regression ◽  
Real Estate ◽  
Multiple Linear Regression ◽  
Sampling Method ◽  
Secondary Data ◽  
Financial Reports ◽  
Accounting Firm ◽  
Purposive Sampling ◽  
Sample Data

The purpose of this research is to examine the effect of company’s size, profitability, solvability, and the size of the accounting firm towards audit delay. The object in this research are property and real estate companies listed in Bursa Efek Indonesia (BEI) for the period 2013-2015. The sample is selected by purposive sampling method. There are 42 companies selected as sample. Data used in this research is a secondary data such as audited financial reports. Data analysis uses multiple linear regression. The result of this research shows that company’s size, profitability, and solvability have no influence on audit delay, while the size of accounting firm has significant positive influences on audit delay. The result also shows that company’s size, profitability, solvability, and the size of of the accounting firm simultaneously influence audit delay. Keywords: audit delay, company’s size, profitability, solvability, size the accounting firm

PENGARUH UMUR PERUSAHAAN, LIKUIDITAS DAN PROFITABILITAS TERHADAP KETEPATAN WAKTU PENYAMPAIAN LAPORAN KEUANGAN “(TIMELINESS)”

Equity ◽  
2015 ◽  
Vol 18 (1) ◽  
pp. 71
Author(s):  
Retna Sari
Keyword(s):  
Sampling Method ◽  
Stock Exchange ◽  
Financial Report ◽  
Purposive Sampling

This research was conducted to examine the effect age of company, likuidity and profitability to timeliness in the submission of the financial report of manufacturing in Indonesia Stock Exchange period 2012. Sample that as many as 92 companies. Sample determination technique using purposive sampling method. Hypotesis testing using a logistic anlysis. The result showed that all variables are not significantly to the timeliness. 

PENGARUH MODAL KERJA TERHADAP PROFITABILITAS PERUSAHAAN LQ-45 YANG TERDAFTAR DI BURSA EFEK INDONESIA

2008 ◽  
Author(s):  
Raja Adri Satriawan Surya ◽  
Kirmizi Kirmizi ◽  
Tita Ratna Juwita R. Ratna Juwita R.
Keyword(s):  
Significant Influence ◽  
Sampling Method ◽  
T Test ◽  
Working Capital ◽  
F Test ◽  
Purposive Sampling ◽  
Inventory Turnover ◽  
Turn Over

The purpose of this research is to test the effect of working capital (cash turn over, inventory turnover and receivable turnover) towards profitability at LQ-45 companies listed at Bursa Efek Indonesia. The population of this research are all LQ-45 companies listed in Bursa Efek Indonesia (BEI). The samples are 19 LQ-45 companies listed in BEI during the year 2004 - 2006. The samples are chosen by using purposive sampling method. The data are analysed with partial test (T-test) and simultant test (F-test) by means of SPSS Ver 13.0. The results show that cash turn over, inventory turnover, and receivable turnover simultaneously have significant influence towards profitability. Partially cash turn over, inventory turnover, and receivable turnover have also significant influence to profitability.

A STUDY ON THE QUALITY ASSURANCE OF PAST AND PRESENT EVALUATION PROCEDURE OF B.ED. PROGRAMME OF GARHWAL, UNIVERSITY (THE CENTRAL UNIVERSITY) IN VIEW OF NCTE NORMS.

2018 ◽  
Vol 6 (26) ◽  
Author(s):  
Ruchika Verma ◽  
Seema Dhawan
Keyword(s):  
Quality Assurance ◽  
Prospective Teachers ◽  
Sampling Method ◽  
Evaluation Procedure ◽  
Interview Schedule ◽  
Purposive Sampling ◽  
Present Evaluation ◽  
Method Of Evaluation

The study attempted to find out the quality of the evaluation procedure of B.Ed. programme of Garhwal University, the Central University in view of NCTE Norms. The study also reveals the method and procedure of evaluation according to the latest 2 years B.Ed. programme. For the study, purposive sampling method was used. The tools – questionnaire and interview schedule was developed. On the basis of findings, it concluded that the evaluation procedure was in accordance with the NCTE Norms. With the implementation of two years B.Ed. course, the method of evaluation has also become more practical oriented, which has become a remarkable achievement and surely enhance the quality of prospective teachers

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