scholarly journals Keanekaragaman Belalang (Orthoptera: Acrididae) padaEkosistem Sawah di Desa Banyuasin Kecamatan Riau Silip Kabupaten bangka

2021 ◽  
Vol 6 (2) ◽  
pp. 78-85
Author(s):  
Riko Irwanto ◽  
Tissya Milly Gusnia

The paddy field ecosystem is a place for interactions between plants and animals, especially between rice plants and grasshoppers. Grasshoppers act as eaters of rice plants, of course, become a threat to agriculture so that they can reduce agricultural productivity. This study aims to determine the diversity of Orthoptera: Acrididae in the rice fields of Banyuasin Village, Riau Silip District, Bangka Regency and the habitat conditions of Orthoptera: Acrididae in the rice fields of Banyuasin Village, Riau Silip District, Bangka Regency. This research is a descriptive quantitative research using purposive sampling method using insect net and handsorting techniques. Measurement of environmental factors is carried out by taking data on soil temperature, soil moisture, and light intensity. The research data were analyzed using the Shannon diversity index and the evenness index. Based on observations, there were 6 types of Acrididae family found in the rice field ecosystem, namely 16 individuals of Valanga nigricornis, 12 of Xenocatantops humilis, 11 of Phlaeoba fumosa, 13 Traulia azureipennis, 9 Oxya hyla and 3 Trimerotropis pallidipenni. The analysis showed that the diversity index of grasshoppers was 1.70 which was classified as moderate criteria and the evenness index was 0.41 which was classified as moderate. The locust habitat that has been obtained has optimal soil temperatures ranging from 35oC-45oC, with 50% soil moisture. Keywords: Acrididae, diversity, Ecosystem, Orthoptera, Rice Fields ABSTRAK Ekosistem sawah merupakan tempat terjadinya interaksi antara tumbuhan dan hewan khususnya antara tumbuhan padi dan Belalang. Belalang bertindak sebagai pemakan tumbuhan padi tentunya menjadi ancaman bagi pertanian sehingga dapat menurunkan produktivitas pertanian. Penelitian ini bertujuan untuk mengetahui keanekaragaman Orthoptera:Acrididae di ekosistem sawah Desa Banyuasin Kecamatan Riau Silip Kabupaten Bangka dan  kondisi habitat Orthoptera:Acrididae di ekosistem sawah Desa Banyuasin Kecamatan Riau Silip Kabupaten Bangka. Penelitian ini berupa deskriptif kuantitatif dengan menggunakan metode purposive sampling  dengan menggunakan tehnik insect net dan handsorting. Pengukuran faktor lingkungan dilakukan dengan mengambil data suhu tanah, kelembaban tanah, dan intensitas cahaya. Data hasil penelitian dianalisis dengan menggunakan indeks keanekaragaman Shanon, dan indeks kemerataan. Berdasarkan hasil pengamatan, didapatkan sebanyak 6 jenis family Acrididae yang terdapat pada ekosistem sawah, yaitu Valanga nigricornis sebanyak 16 individu, Xenocatantops humilis berjumlah 12 individu, Phlaeoba fumosa berjumlah 11 individu, Traulia azureipennis 13 individu, Oxya hyla  berjumlah 9 individu dan Trimerotropis pallidipennis berjumlah 3 individu. Hasil analisis menunjukkan bahwa indeks keanekaragaman belalang sebesar 1,70 tergolong kriteria sedang dan indeks kemerataan sebesar 0,41 tergolong sedang. Habitat belalang yang telah didapatkan ini memiliki suhu tanah yang optimal mulai dari 35oC-45oC, dengan kelembaban tanah 50%. Kata kunci: Acrididae, Ekosistem, keanekaragaman, Orthoptera, Sawah

2018 ◽  
Vol 7 (1) ◽  
pp. 37
Author(s):  
Rodhiyah Patmawati ◽  
Hadi Endrawati ◽  
Adi Santoso

Perairan Pulau Panjang dan Teluk Awur merupakan lokasi wisata dan dimanfaatkan masyarakat sebagai sumber mata pencaharian. Zooplankton berperan sebagai konsumen tingkat satu yang menghubungkan fitoplankton dengan organisme tingkat tinggi. Tujuan dari penelitian ini adalah  untuk mengetahui komposisi, kelimpahan, indeks keanekaragaman, indeks keseragaman, indeks dominansi zooplankton di perairan Pulau Panjang dan teluk Awur. Metode yang digunakan dalam penelitian ini adalah deskriptif eksploratif dan penentuan lokasi menggunakan metode purposif sampling. Penelitian ini terbagi atas 5 stasiun dengan 3 sub-stasiun di setiap stasiun. Pengambilan sampel zooplankton dengan cara aktif dengan menarik planktonet secara horizontal. Pengambilan sampel dilakukan pada bulan Januari 2017. Hasil penelitian diperoleh 31 genera zooplankton dari 8 fila di perairan Pulau Panjang dan 20 genera zooplankton dari 3 fila di perairan Teluk Awur. Kelimpahan rata-rata zooplankton berkisar antara 378 Ind/L – 892 Ind/L di perairan Pulau Panjang dan 341 Ind/L – 446 Ind/L di perairan Teluk Awur. Indeks Keanekaragaman zooplankton menunjukkan nilai  2,36 – 2,68 di perairan Pulau Panjang dan 2,29 – 2,62 di perairan Teluk Awur yang termasuk dalam kategori sedang. Indeks keseragaman zooplankton menunjukkan nilai 0,75 – 0,88 di perairan Pulau Panjang dan 0,89 – 0,94 di perairan Teluk Awur yang termasuk dalam kategori Tinggi. Indeks dominansi di kedua lokasi menunjukkan tidak ada genus tertentu yang mendominasi dengan nilai 0,12 – 0,25 di perairan Pulau panjang dan 0,07 – 0,11 di perairan Teluk Awur.  Panjang Island and Teluk Awur waters are a marine tourism places and both the waters are also utilized as a source of community livelihood. Zooplankton role is as the first-level consumer that connects phytoplankton with the high-level organisms. The purpose of this research was to know the compotition, abundance, diversity index, evennes index and dominance index of zooplankton in the waters of Panjang Island and Teluk Awur of Jepara Regency. This research used deskriptive eksplorative method and determination location used purposive sampling method. This study was divided into 5 stations and with 3 sub-stations at each station. Zooplankton sampling was horizontally active by pulling the plankton-net. Sampling was done in january 2017. The results found 31 zooplankton genera of 8 phyla in Panjang Island waters and 20 zooplankton genera of 3 phyla in Teluk Awur waters. The average abundance ranged from 378-892 ind/L in Panjang Island waters and 341-446 ind/L in Teluk Awur waters. The zooplankton Diversity Index indicated the values of 2.36 - 2.68 in Panjang Island waters and 2.29-2.62 in Teluk Awur waters  which were in the medium category. The zooplankton evenness index indicated a value of 0.75-0.88 in Panjang Island waters and 0.89-0.94 in Teluk Awur waters belonging to the High category. The dominance index at both sites indicated that no particular genus dominating with the values of 0.12 - 0.25 in Panjang Island waters and 0.07-0.11 in Teluk Awur waters.


2021 ◽  
Vol 3 (1) ◽  
pp. 54-66
Author(s):  
Elda Sari ◽  
Nora Idiawati ◽  
Sukal Minsas

The research of composition and community structure of copepods in Kakap river estuary, Kubu Raya District, West Borneo was conducted from October to December 2020. The purpose of this study is to determine the composition and the community structure of copepod in Kakap river estuary, Kubu Raya District, West Borneo. This study used a purposive sampling method at four stations. Copepod samples were taken using plankton net. During the research, the total number of copepods that have been identified from 4 stations are 11 species from 3 orders, 4 families and 8 genera. Copepoda that has been obtained has the composition, namly Cyclopoids 5 species, Harpacticoida 3 species, Calanoida 2 species. The copepod density in Kakap river estuary ranged from 7,9-103,3 Ind / l, the diversity index (H ') ranged from 0 to 1.9, the evenness index (E) ranged from 0 - 0,9 and the dominance index (C) ranged from 0,2 - 1. The result of copepod density correlation analysis is that negatively correlated with -1,000 current parameter and positively correlated with the DO parameter, which is 0,800. The research of composition and community structure of copepods in Kakap river estuary, Kubu Raya District, West Borneo was conducted from October to December 2020. The purpose of this study is to determine the composition and the community structure of copepod in Kakap river estuary, Kubu Raya District, West Borneo. This study used a purposive sampling method at four stations. Copepod samples were taken using plankton net. During the research, the total number of copepods that have been identified from 4 stations are 11 species from 3 orders, 4 families and 8 genera. Copepoda that has been obtained has the composition, namly Cyclopoids 5 species, Harpacticoida 3 species, Calanoida 2 species. The copepod density in Kakap river estuary ranged from 7,9-103,3 Ind / l, the diversity index (H ') ranged from 0 to 1.9, the evenness index (E) ranged from 0 - 0,9 and the dominance index (C) ranged from 0,2 - 1. The result of copepod density correlation analysis is that negatively correlated with -1,000 current parameter and positively correlated with the DO parameter, which is 0,800.


BIOSCIENTIAE ◽  
2021 ◽  
Vol 17 (2) ◽  
pp. 37
Author(s):  
Sukoco Sukoco ◽  
Gunawan Gunawan ◽  
Muhamat Muhamat

This study aims to determine the structure of phytoplankton communities in the pool are former coal mining Desa Kampung Baru Kecamatan Cempaka which include abundance, diversity, uniformity and dominance. Phytoplankton samples taken in two pools with a purposive sampling method with a three-point shooting at each pond. Sampling was performed three times. Phylum of phytoplankton were identified in both pools as much as 2 phylum (Chloropyta and Chrysopita) with 17 genera. Average abundance of phytoplankton in the first pool of 7174 ind / liter and 6873 ind / liter in the second pool. The average diversity index of phytoplankton in the first pool of 1.540 and 1.621 in the second pool. Average uniformity index of phytoplankton in the first pool of 0622 and 0.623 in the second pool. The average index of phytoplankton dominance in the first pool of 0271 and 0250 in the second pool. Analysis of community structure (abundance, diversity, uniformity and dominance) shows the condition of the two ponds in the state is quite stable and capable of supporting life inside the phytoplankton. Where the pool in the fertility rate is the level of contamination is, the conditions included in the category of individuals spread more evenly and there are no species that dominate other species in the extreme.


Author(s):  
Erwin Theofilius ◽  
Zahidah Hasan ◽  
Asep Agus Handaka ◽  
Herman Hamndani

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.


2018 ◽  
Vol 7 (3) ◽  
pp. 253-262
Author(s):  
Faudzi Ath Tho Azzam ◽  
Niniek Widyorini ◽  
Bambang Sulardiono

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.  


2020 ◽  
Vol 3 (1) ◽  
pp. 1-10
Author(s):  
Elizabeth Rahayu

Abstract The purpose of this research is to understand the influence of price and product quality of T-Mart Express Indonesia’s customer satisfaction. This research is a quantitative research by using the SPSS Statistic 22 with 112 respondent of the sample which is T-Mart Express Indonesia consumers in North  Jakarta who have bought the product three times or more by using non-probability sampling method and purposive sampling techniques. The measurement used was a questionnaire that was distributed through Google Form to the respondent. The result of hypothesis analysis shows that price and product quality significantly affect customer satisfaction. Implications and suggestions are explained in the article. Abstrak Tujuan dari penelitian ini adalah untuk memahami pengaruh harga dan kualitas produk terhadap kepuasan pelanggan T-Mart Express Indonesia. Penelitian ini adalah penelitian kuantitatif dengan menggunakan SPSS Statistic 22 dengan sampel sebanyak 112 responden yaitu konsumen T-Mart Express Indonesia di Jakarta Utara yang telah membeli produk tiga kali atau lebih dengan menggunakan metode non probability sampling dan teknik purposive sampling. Pengukuran yang digunakan adalah kuesioner yang dibagikan melalui Google Form kepada responden. Hasil analisis hipotesis menunjukkan bahwa harga dan kualitas produk berpengaruh signifikan terhadap kepuasan pelanggan. Implikasi dan saran dijelaskan pada artikel    


2017 ◽  
Vol 4 (1) ◽  
pp. 96 ◽  
Author(s):  
Ni Putu Eva Damayanti ◽  
I Wayan Gede Astawa Karang ◽  
Elok Faiqoh

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.


2017 ◽  
Vol 2 (1) ◽  
pp. 25 ◽  
Author(s):  
Ludi Parwadani Aji ◽  
Andriani Widyastuti

Coastal areas of Biak Island consist of three major ecosystems: the mangrove, seagrass beds, and coral reefs where a variety of molluscs live. Mollusc diversity in South Biak waters was investigated in September 2011. The observation was conducted at 4 locations, i.e. Paray, Ambroben, Yenures, and Sorido with 2 stations at each location. The study aimed to obtain information on the diversity and community structure of the benthic molluscs (gastropods and bivalves) on the coastal areas of South Biak waters. Sampling method applied was quadrate-transect line in intertidal areas from inshore to offshore. The molluscs (epifauna and infauna) found inside the quadrate-transect were counted and identified. The result showed high benthic mollusc diversity with a total of 94 species, consisting of 75 species of gastropods and 19 species of bivalves. The most widespread gastropod found in all stations was Nassarius sp., while for bivalves was Tellina sp. The highest value of diversity index (H) was 2.96 found in Paray 1 and the lowest was 0.58 in Yenures 1. The Evenness index (E) and Simpson index (D) ranged from 0.27 to 0.96 and from 0.06 to 0.72 respectively. Species richness (d) ranged from 2.89 to 6.84 and similarity index from 3.90 to 42.40.  


2018 ◽  
Vol 6 (1) ◽  
Author(s):  
Agung Rachmadi S

In this study, researcher aims to discuss about advertising and public relations as tools to create brand awareness on Citilink Airlines. This study was a quantitative research appertaining descriptive research. Sampling technique in this study was nonprobability sampling with purposive sampling method with 100 respondents who stay in Malang Raya and respondents must be more than 17 years old and stay in Malang for long periode of time or just for awhile and know Citilink Airlines. Analyze tool of data which used was multiple regression analyze. The results of this study is advertising and public relations have significant effect on brand awareness as parsial


2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Yulpi Poae ◽  
Ventje Ilat ◽  
Jessy Warongan

Abstract. This study is intended to analyze the influence of Regional-Owned Asset (BMD) management towards the quality of the financial statements of Talaud Local Government. The variables used in this study are planning, assessment, administration, and BMD surveillance and control. 158 respondents were taken by using purposive sampling method. This is a quantitative research with multiple regression analysis. The results show that the assessment, administration, surveillance and control of BMD partially significantly influence the quality of the financial statements of local government, while the planning has negative and insignificant influence to the quality of the financial statements of local government. The results also indicate that the planning, assessment, administration, surveillance and control of BMD simultaneously, positively and significantly influence the quality of the financial statements of Talaud Local Government. The value of the coefficient of determination shows that planning, assessment, administration, and surveillance and control of BMD influence simultaneously to the quality of financial statements of local government at 36.5%, the balance 63.5% is influenced by other factors outside the research model. Keywords: Quality of Financial Statements of Talaud Local Government, Planning, Assessment, Administration, BMD Surveillance and Control. Abstrak. Penelitian ini bertujuan untuk menganalisis pengaruh pengelolaan Barang Milik Daerah (BMD) terhadap kualitas laporan keuangan Pemerintah Daerah Kabupaten Kepulauan Talaud. Variabel-variabel yang digunakan adalah perencanaan, penilaian, penatausahaan, serta pengawasan dan pengendalian BMD. Dengan menggunakan metode purposive sampling, jumlah sampel penelitian yang diambil sebanyak 158 responden. Jenis penelitian ini adalah kuantitatif dengan menggunakan metode analisis regresi berganda. Hasil penelitian menunjukkan bahwa secara parsial penilaian, penatausahaan, pengawasan dan pengendalian BMD memiliki pengaruh positif dan signifikan terhadap kualitas laporan keuangan pemerintah daerah, sedangkan perencanaan BMD memiliki pengaruh negatif dan tidak signifikan terhadap kualitas laporan keuangan pemerintah daerah. Hasil pengujian secara simultan menunjukkan bahwa perencanaan, penilaian, penatausahaan, pengawasan dan pengendalian BMD berpengaruh positif dan signifikan terhadap kualitas laporan keuangan pemerintah daerah. Nilai dari koefisien determinasi menunjukkan bahwa perencanaan, penilaian, penatausahaan, pengawasan dan pengendalian BMD bersama-sama berkontribusi terhadap kualitas laporan keuangan pemerintah daerah yaitu sebesar 36,5%, sisanya 63,5 % dipengaruhi oleh faktor lain diluar model penelitian. Kata Kunci: Kualitas LKPD, Perencanaan, Penilaian, Penatausahaan, Pengawasan dan Pengendalian BMD


Sign in / Sign up

Export Citation Format

Share Document