scholarly journals KEANEKARAGAMAN SERANGGA PERMUKAAN TANAH DI KAWASAN BUKIT GATAN KABUPATEN MUSI RAWAS

2021 ◽  
Vol 3 (2) ◽  
pp. 65-70
Author(s):  
Dina Setiawati ◽  
Yunita Wardianti ◽  
Mareta Widiya
Keyword(s):  
Sampling Method ◽  
Diversity Index ◽  
Abiotic Factors ◽  
Ground Surface ◽  
Soil Surface ◽  
Pitfall Trap ◽  
Dominance Index ◽  
Ecological Index ◽  
Hill Area ◽  
Qualitative Descriptive

This study aims to determine the diversity of soil surface insects, in the Bukit Gatan area, Musi Rawas Regency. This research is a qualitative descriptive study using a pitfall trap and using a random sampling method. The results showed that the types of ground surface insects contained 3 orders, 5 families and 10 species.The results of the analysis of the ecological index of soil surface insects in the Gatan hill area, Musi Rawas Regency, namely the diversity index (H') 1.241 in the low category, Evennes index (E') 0.64 in the medium category, and the dominance index (C)0.277 in the medium category.The abiotic factors in the Bukit Gatan area, Musi Rawas Regency at the research site are the average air temperature 29℃, average soil pH 6.5, and average soil moisture 85.3%.Diversity of soil surface insects in the Bukit Gatan area, Musi Rawas Regency is in the low category.

scholarly journals STRUKTUR KOMUNITAS ECHINODERMATA DI KAWASAN INTERTIDAL GILI MENO, LOMBOK UTARA

2019 ◽  
Vol 12 (2) ◽  
pp. 181-188
Author(s):  
M. Irsyad A. Ghafari ◽  
Gito Hadiprayitno ◽  
M. Liwa Ilhamdi ◽  
Noar Muda Satyawan
Keyword(s):  
Essential Role ◽  
Diversity Index ◽  
Intertidal Area ◽  
Dominance Index ◽  
Aquatic Resources ◽  
Ecological Index ◽  
Environmental Friendly ◽  
Evenness Index ◽  
Belt Transect ◽  
The Stability

AbstrakEchinodermata merupakan salah satu kelompok invertebrata yang memegang peranan penting, baik secara ekologi maupun ekonomi. Pengetahuan tentang organisme ini sangat dibutuhkan terkait dengan keberadaannya di alam yang semakin tergerus oleh pembangunan dan aktivitas manusia yang tidak ramah lingkungan. Penelitian ini bertujuan untuk mengetahui struktur komunitas Echinodermata di kawasan intertidal Gili Meno, Lombok Utara, yang dilakukan pada bulan April 2018 di 6 stasiun pengamatan yang tersebar di kawasan intertidal. Pengambilan data dilakukan dengan metode belt transect dengan pengulangan sebanyak 2–4 kali pada setiap stasiun, dengan luas transek 100 m2. Hasil pengamatan menunjukkan bahwa ditemukan 13 spesies yang berasal dari 4 kelas Echinodermata, yaitu Asteroidea (1 spesies), Echinoidea (4 spesies), Holothuroidea (4 spesies), dan Ophiuroidea (4 spesies). Hasil penghitungan indeks ekologi menunjukkan bahwa indeks keanekaragaman komunitas Echinodermata berkisar antara 0,16–1,36 (kategori rendah-sedang). Indeks dominansi di setiap stasiun berkisar antara 0,32–0,94 (kategori rendah-sedang), sedangkan indeks kemerataan sebesar 0,25 (kategori rendah). Hal ini menunjukkan bahwa stabilitas komunitas Echinodermata di kawasan intertidal Gili Meno tergolong rendah. Hasil penelitian ini diharapkan dapat menjadi acuan dalam pembangunan kawasan wisata yang ramah lingkungan tanpa mengabaikan keberadaan sumber daya hayati laut di kawasan Gili Meno, Lombok Utara.Abstract Echinoderms are one group of invertebrates that play an essential role, both ecologically and economically. Knowledge about this organism is needed concerning its presence in nature, which increasingly eroded by the development and activities of people who are not environmental friendly. This study aims to determine the structure of the Echinoderms community in the intertidal area of Gili Meno, North Lombok, were conducted on April 2018 at six observation stations. Data were collected by belt transect method with repetition of 2–4 times at each station, with 100 m2 transect area.  The observations showed that found 13 species included in 4 classes of Echinoderms, namely Asteroidea (1 species), Echinoidea (4 species), Holothuroidea (4 species) and Ophiuroidea (4 species). The ecological index of the Echinoderms community showed that the diversity index ranged from 0.16–1.36 (low-medium). The dominance index at each station ranged from 0.32 to 0.94 (low-medium), while the evenness index was 0.25 (low). The stability of the Echinoderms community in Gili Meno intertidal area relatively low. The results expected to be a reference in the development of environmentally friendly tourism areas without ignoring the existence of living aquatic resources in the Gili Meno, North Lombok.

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.

scholarly journals IDENTIFIKASI GASTROPODA DI SUB DAS ANAK SUNGAI GANDONG DESA KERIK TAKERAN

2015 ◽  
Vol 2 (2) ◽  
Author(s):  
Mustika Wahyuning Tyas ◽  
Joko Widiyanto
Keyword(s):  
Qualitative Research ◽  
Observational Study ◽  
Site Selection ◽  
Research Method ◽  
Sampling Method ◽  
Diversity Index ◽  
Environmental Parameters ◽  
Research Station ◽  
Dominance Index ◽  
Transect Sampling

The aim of research to determine the diversity and Gastropod that predominate in sub watershed tributary village Gandong Takeran Kerik. Descriptive qualitative research method with type of observational study. Determination and site selection studies using transect sampling method, the size of 1x1 m transect quadrant. Research station at 3 stations with 3 points each station. The data was analyzed after identifying the calculation dominance index and diversity index. Gastropod identification results found 4 genera Thiara, Melanoides, Brotia, and Clea. The highest abundance of gastropods at station II, namely 13.7 ind/m2. Thiara highest dominance index is 0.654, indicating that Thiara mendominansi in sub watershed tributary village Gandong Takeran Kerik. Diversity index of each station 0.617, 0.765, and 0.615, indicating that the diversity of gastropods in sub watershed tributary village Gandong Takeran Kerik is very low. Environmental parameters air temperature 30C - 31C, 28C - 29C water temperature, pH 7 to 7.3, and dissolved oxygen (DO) 5mg /l - 5,4mg /l.

scholarly journals STUDY OF MANGROVE COMMUNITY STRUCTURE IN UJUNG BATU BEACH WATER, FLORES SEA, JENEPONTO DISTRICT

2020 ◽  
Vol 8 (5) ◽  
pp. 108-120
Author(s):  
Budiman Yunus ◽  
Sharifuddin Bin Andy Omar ◽  
Basse Siang Parawansa
Keyword(s):  
Diversity Index ◽  
Dominance Index ◽  
Rhizophora Stylosa ◽  
Ecological Index ◽  
Mangrove Area ◽  
Avicennia Alba ◽  
Index Index ◽  
Important Value Index ◽  
Mangrove Communities ◽  
Index Of Diversity

This study aims to examine the density, frequency and closure of mangrove areas. In addition, it also analyzed the ecological index (index of diversity, uniformity, and dominance) of mangrove vegetation in the waters of Ujung Batu, Flores Sea, Jeneponto Regency. This research was conducted using the 10 x 10 m2 transect plot method. The data obtained were analyzed to determine the density, frequency, closure and important value index (IVI) as well as to analyze the diversity index, uniformity and dominance index. The results of this study are; mangrove communities in the waters of the Ujung Batu, Flores coast, consists of types Avicennia alba, A. marina, A. officinalis, Sonnneratia alba and Rhizophora stylosa. A. alba dominates at the three observation stations (I, II and III). This is marked by the high importance (IVI) at all levels. The diversity index (H ') at the study site ranged from 0.36 - 0.51, indicating a low level of diversity. The Simpson dominance index (SDI) ranges from 0.34 to 0.54, indicating that one of the species (A. alba) dominates the mangrove area in the study site.

scholarly journals Ecological Index of Fouling Organisms in Different Media In Daruba Morotai Island District

2021 ◽  
Vol 56 (2) ◽  
pp. 375-384
Author(s):  
Djainudin Alwi ◽  
Rinto Muhammad Nur ◽  
Nurafni ◽  
Kismanto Koroy ◽  
Iswandi Wahab ◽  
...  
Keyword(s):  
Diversity Index ◽  
Data Retrieval ◽  
Ecological Indices ◽  
Dominance Index ◽  
Retrieval Method ◽  
Ecological Index ◽  
A Value ◽  
Fouling Organisms ◽  
Floating Pier ◽  
Number Of Individuals

On the port pole is very much found biota attached. The biota is barnacles (Balanus sp). The attachment does not only occur in natural substrates. It may also occur in different means of human interest, such as ships and docks. This research is devoted to macroscopic biofouling, whose attachment is massif on the dock pole. This study aims to determine the species and ecological index of biota fouling in different media in the Daruba Morotai Island Regency. The data retrieval method uses a quadratic with a scale of 20×100 cm2. This study used three media, namely wood media (speedboat wooden pier), iron media (speedboat floating pier), and concrete media (Imam Lastori's main pier). Ecological indices analyzed include abundance, Diversity Index, Uniformity Index, and Dominance Index. The analysis results found the most number of macrobiofouling species in the wood medium (7 species). The largest number of individuals found is Branchidontes sp. (661 individuals). The findings of the study of the maximum macrofouling abundance are found in concrete media with a value of 491. Diversity in all media is classified as medium with a value of H' on wood media 1.22, iron media 1.04, and concrete media 1.34. The uniformity index (E) of all three media indicates the uniformity of broad populations with the maximum E found in concrete media 0.84. The study of dominance in wood media by 0.41, iron media 0.48, and concrete media 0.32 showed that dominance is poor.

scholarly journals Kondisi Terumbu Karang di Kawasan Taman Nasional Laut Kepulauan Seribu DKI Jakarta

2014 ◽  
Vol 19 (1) ◽  
Author(s):  
Drajad Sarwo Seto ◽  
Djumanto ◽  
Namastra Probosunu
Keyword(s):  
National Park ◽  
Diversity Index ◽  
Good Condition ◽  
Dominance Index ◽  
Ecological Index ◽  
The Core ◽  
High Uniformity ◽  
Belt Transect ◽  
Set Up ◽  
Line Intercept

AbstractThe objective of this research was to determine the condition of coral reefs, namely the percentage of coral covered, species distribution, community structure of coral, and the environmental conditions surround the core zone, protection zone, tourism zone, and residential zone in Kepulauan Seribu Marine National Park DKI Jakarta. The research was conducted from 8 to 16 May, 2013. The data was collected from four zones and each zone was set up into two stations as a point observation, at the depth of 79 meters. The percentage of coral coverring was calculated by line intercept transect method, coral genera was counted and identified using the belt transect method. Coral data was analyzed qualitatively based on ecological index. The results showed that the coral covering was range from 7.25 to 68.93% as categorized from bad to good condition. The number of coral was found approximately of 5.523 colonies that consisted of 45 genera and 16 families. The most abundance of coral was Porites and Montipora with percentage of 19.7% and 16.69%, respectively. Coral diversity index was ranged from 1.61 to 3.07 as indicated of low to high. Uniformity index was ranged from 0.44 to 0.68, which was the community in stressful to labile situation. Dominance index (D) was ranged from 0.06 to 0.32 showing that coral dominance was absence.Keywords: Coral reef, cover, diversity, Kepulauan SeribuAbstrakPenelitian ini bertujuan mengetahui kondisi terumbu karang yang meliputi persentase tutupan, sebaran, struktur komunitas dan kondisi lingkungan di zona inti, perlindungan, pemanfaatan wisata, dan pemukiman di kawasan Taman Nasional Laut Kepulauan Seribu DKI Jakarta. Penelitian dilaksanakan dari tanggal 8 sampai 16 Mei 2013. Pengambilan data berada pada empat zona pengelolaan dan setiap zona ditetapkan sebanyak dua stasiun pengamatan pada kedalaman 79 meter. Persentase tutupan karang dihitung dengan metode Line Intercept Transect, genera karang dihitung dan diidentifikasi menggunakan metode Belt Transect. Data jenis karang yang diperoleh dianalisis kualitatif berdasarkan indeks ekologis. Hasil penelitian diperoleh persentase tutupan karang berada pada kisaran 7,2568,93% yang dikategorikan kondisinya buruk hingga baik. Jumlah karang dari seluruh stasiun penelitian sebanyak 5.523 koloni yang terdiri dari 45 genera dan 16 famili. Genus karang yang paling sering dijumpai adalah Porites dan Montipora dengan persentase kelimpahannya masing-masing 19,7% dan 16,69%. Nilai indeks keanekaragaman (H’) karang berkisar antara 1,613,07 yang tergolong rendah hingga tinggi. Indeks keseragaman berkisar 0,440,68 yang berarti komunitas dalam keadaan tertekan hingga labil. Nilai indeks dominansi (D) berkisar 0,060,32 yang menunjukkan dominansi karang tertentu tergolong rendah.Kata kunci: Tutupan, terumbu karang, keragaman, Kepulauan Seribu

scholarly journals Diversity Index of Insect Species on Sorghum Plantations in Kolam Village, Percut Sei Tuan District, Deli Serdang

2020 ◽  
Vol 3 (2) ◽  
pp. 89-104
Author(s):  
Parlindungan Tarihoran ◽  
Ameilia Zuliyanti Siregar ◽  
Marheni
Keyword(s):  
Relative Frequency ◽  
Sampling Method ◽  
Diversity Index ◽  
Light Trap ◽  
Pitfall Trap ◽  
Sticky Trap ◽  
The Status ◽  
Yellow Sticky Trap ◽  
Richness Index ◽  
Sweep Net

This research aimed to know the diversity of insects of sorghum plantations and the status of insect functions in sorghum plants. The purposive sampling method were done, which used 4 traps, consist of yellow sticky trap, sweep net, pitfall trap and light trap for 8 observations research were done from May to September 2019 at Kolam Village, Percut Sei Tuan District of Deli Serdang Regency, then continue to identified in Pest Laboratory Faculty of Agriculture University of Sumatera Utara, Medan. The results showed that there were 117 individuals insects which consist of 10 orders and 33 families. The highest relative density was 14.74% and the lowest was 0.42% sere recorded, while the highest relative frequency was 4.08% and the lowest was 1.53%. The value of insect diversity index was 3.115 (High), it is mean the diversities of insects varied and the habitat was good for growth of insects. The value of evenness index was 0.891 (high) and richness index was 4.15 (high). The dominant insects recorded from Order of Hymenoptera (Family of Formicidae), continued to Coleoptera (Family of Scarabaeidae; Coccinellidae) are quite diverse in the sorghum plantations. The function status of insects was recorded as herbivores, parasitoids, predators, pollinators and decomposer were determined.

scholarly journals KEANEKARAGAMAN DAN KOMPOSISI IKAN PADA KONDISI PASANG DAN SURUT DI MUARA SUNGAI KELAY KABUPATEN BERAU KALIMANTAN TIMUR

2019 ◽  
Vol 10 (2) ◽  
pp. 11
Author(s):  
Yudistira Yudistira ◽  
Jusmaldi Jusmaldi ◽  
Medi Hendra
Keyword(s):  
Species Diversity ◽  
Fish Species ◽  
Sampling Method ◽  
Diversity Index ◽  
High Tide ◽  
Similarity Index ◽  
Wiener Index ◽  
Dominance Index ◽  
East Kalimantan ◽  
Evenness Index

Research on diversity and composition of fish at low tide and high tide condition in downstream Kelay River, District Berau, East Kalimantan is not yet know. The purpose of this research was to determine diversity and composition of fish that present at low tide and high tide condition in downstream Kelay River. In research using purposive sampling method and various sizes gill nets used. Results of this research shows that fish were collected at three locations sampling in downstream Kelay River consist of 14 species, 9 families, and 953 individuals. Based on the number of species, diversity Shannon-Wiener index and dominance index has stable of communities, with high value of diversity index (H'=1.975), high evenness index (E=0.749), and low value of dominance index  (D= 0.173). The number of fish species found at low tide were 11 species and at high tide were 12 species. The similarity index of fish species at low tide and high tide condition were 64.3%.

scholarly journals COLLEMBOLA DIVERSITY IN FORMER TRADITIONAL GOLD MINING IN SAMPOINIET DISTRICT, ACEH JAYA REGENCY

2021 ◽  
Vol 9 (1) ◽  
pp. 81
Author(s):  
Ernilasari Ernilasari ◽  
Rizky Ahadi ◽  
Cut Nadia Rahmi
Keyword(s):  
Gold Mining ◽  
Sampling Method ◽  
Diversity Index ◽  
Morphological Characteristics ◽  
Pitfall Trap ◽  
Waste Storage ◽  
Storage Area ◽  
Concentration Threshold ◽  
The Stability ◽  
June July

Collembola functions as a bio-indicator of soil fertility, while maintaining the stability of nutrients and oxygen which are very beneficial for plants. However, the Collembola diversity in its habitat could be affected by mercury waste. This study aims to determine the diversity of Collembola species in the former mercury waste storage area of traditional gold mining in Ligan Village, Sampoiniet District, Aceh Jaya Regency. This research was conducted in June-July 2019 in 6 (six) locations in the former mercury waste storage area in Ligan Village, Sampoiniet District, Aceh Jaya Regency. The sampling was done by purposive sampling method using pitfall trap. Data were collected by comparing the morphological characteristics of Collembola by referring to Boror's (1996) identification book and analyzed with Diversity Index of Shannon Winner. There are 5 Collembola species found in the research location with Diversity Indek H '= 1.485323798 in the medium category. Mercury average levels found in the study site have exceeded the crisis concentration threshold with the value of 0.5111 mg/kg, which is assumed affecting the diversity of Collembola species in its habitat.

scholarly journals Density and ecological index of nudibranch in Humbolt Bay Water Jayapura City Papua Province, Indonesia

2021 ◽  
Vol 5 (1) ◽  
pp. 59-64
Author(s):  
Yunus Pajanjan Paulangan ◽  
Agustinus Satrio Supoyo ◽  
John Dominggus Kalor
Keyword(s):  
Growth And Development ◽  
Marine Invertebrates ◽  
Diversity Index ◽  
Small Population ◽  
Dominance Index ◽  
Underwater Visual Census ◽  
Ecological Index ◽  
The Right ◽  
Species Being

Nudibranchs are marine invertebrates from the mollusc phylum of the gastropod class subclass Opisthobranchiata. Nudribanch has many benefits because of its compound content, has the beauty of attractive colors as an underwater tourism photo object, and can be used as biota indicators of ecosystem health. The purpose of this research is to assess density, diversity index, Evenness index, and dominance index as well as water parameters that support the growth and development of nudibranchs in Humbolt Bay, Jayapura City. The research method used is the Underwater Visual Census (UVC) method at a depth of 5 m and 10 m with an observation width of 2.5 to the right and to the left along 100 m. The results showed that there were 14 types of nudibranchia with 122 individuals, with the dominant species being Phyllidiella pustulosa and Phyllidia varicosa. The density of the nudibranch is quite low, which is around 0.022-0.036 individuals / m2, the Diversity Index is low, which is around 1.228-1.463, the Uniformity Index is classified as a small population, 0.120-0.260 (close to 0), and the Dominance Index is quite stable, namely 0.270-0.402. Based on water parameter data It was found that the waters and habitats in Jayapura City's Humbolt Bay are under pressure as indicated by the decline in the quality of the ecosystem, but are still in normal conditions that support the growth and development of marine life, especially nudibranchs.

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