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 Kelimpahan Gastropoda Pada Ekosistem Mangrove Di Desa Tireman, Kabupaten Rembang, Jawa Tengah

2020 ◽  
Vol 9 (1) ◽  
pp. 41-48
Author(s):  
Yuli Laraswati ◽  
Nirwani Soenardjo ◽  
Wilis Ari Setyati
Keyword(s):  
Sampling Method ◽  
Random Distribution ◽  
Diversity Index ◽  
Distribution Patterns ◽  
Mangrove Ecosystem ◽  
Community Similarity ◽  
Purposive Sampling ◽  
Average Value ◽  
Central Java ◽  
Spread Pattern

Ekosistem mangrove mermiliki manfaat sebagai tempat mencari makan serta habitat bagi organisme, mislanya gastropoda. Gastropoda di ekosistem mangrove berperan dalam proses dekomposisi yaitu dengan mencacah daun menjadi lebih kecil, yang kemudian dilanjutkan oleh mikroorganisme. Kepadatan  gastropoda dipengaruhi oleh kegiatan yang terdapat pada ekosistem dan dapat memberikan efek pada kelangsungan hidup gastropoda.Tujuan penelitian adalah untuk mengetahui struktur komunitas gastropoda pada ekosistem mangrove Desa Tireman Kecamatan Rembang, Jawa Tengah. Metode penentuan lokasi sampling menggunakan metode purposive sampling pada 3 lokasi dengan kerapatan mangrove yang berbeda. Pengambilan sampel gastropoda dilakukan dalam transek 5 x 5m dan sampel yang didapat kemudan disortir, diawetkan dan diidentifikasi. Hasil penelitian ditemukan 9 spesies gastropoda termasuk kedalam 3 famili yaitu Casidula nucleus, C. aurisfelis (Ellobiidae), Littoraria scabra, L. carinifera, L. Melanostama (Littorinidae), Cerithidea quadrata, C. cingulata, C. alata, Telescopium telescopium (Potamididae). Spesies yang paling sering ditemukan adalah Cassidula aurisfelis dan Cassidula nucleus. Nilai rata-rata kelimpahan berkisar antara 6,28 - 15,72 Ind/m2. Nilai indeks keanekaragaman termasuk ke dalam kategori rendah hingga sedang. Nilai rata-rata indeks keseragaman termasuk kedalam kategori rendah (0.15-0.27). Nilai rata-rata indeks dominansi menunjukkan tidak adanya dominansi dari spesies tertentu. Pola sebaran menunjukkan pola sebaran mengelompok dan acak. Nilai kesamaan komunitas gastropoda tergolong dalam kategori tinggi. Frekuensi kehadiran gastropoda kategori jarang hingga sangat sering.  The mangrove ecosystem has benefits as a place to eat and habitat for the organism, the gastropod's missile. Gastropods in the mangrove ecosystem play a role in the decomposition process, with the smaller leaves, which are then followed by microorganisms. The density of gastropods is influenced by activities found in ecosystems and can provide an effect on the viability of gastropods. The purpose of research is to know the structure of the gastropods community in the mangrove ecosystem of Tireman Village Rembang District, Central Java. Sampling method of determining location using purposive sampling method in 3 locations with different mangrove density. The gastropod sampling is done in the 5 x 5m transect and the samples obtained are then sorted, preserved and identified. The results of the study found 9 species of gastropods included in the three families, namely Casidula nucleus, C. Aurisfelis (Ellobiidae), Littoraria scabra, L. Carinifera, L. Melanostama (Littorinidae), Cerithidea quadrata, C. cingulata, C. alata, Telescopium telescopium (Potamididae). The most commonly found species are the Cassidula aurisfelis and the Cassidula nucleus. The average value of abundance ranges between 6.28-15.72 Ind/m2. The value of diversity index belongs to low to moderate category. The average value of uniformity index is included in low category (0.15-0.27). The average value of the Dominancy index indicates the absence of dominance of a particular species. The spread pattern shows both group and random distribution patterns. The value of gastropods community similarity belongs to high category. The frequency of presence of gastropods is rare until very frequent.

scholarly journals HUBUNGAN SUBSTRAT DOMINAN DENGAN KELIMPAHAN GASTROPODA PADA HUTAN MANGROVE KULONPROGO, YOGYAKARTA (The Relation of dominant substrate to Gastropods Abundance in the Mangrove Forest of Kulonprogo, Yogyakarta)

2017 ◽  
Vol 13 (1) ◽  
pp. 19
Author(s):  
Rendra Rini Rismatul Chusna ◽  
Siti Rudiyanti ◽  
Suryanti Suryanti
Keyword(s):  
Mangrove Forest ◽  
Research Method ◽  
Sampling Method ◽  
Mangrove Ecosystem ◽  
Accurate Description ◽  
Research Use ◽  
Sand Fraction ◽  
Purposive Sampling

 Substrat mangrove terdiri atas fraksi pasir (sand), lumpur (silt), dan liat (clay). Gastropoda adalah kelompok hewan dari filum moluska yang hidup di jenis substrat dari kasar ke halus. Kelimpahan gastropoda dipengaruhi oleh substrat dasar yang merupakan habitat dari gastropoda, serta kandungan nutrien yang berbeda pada tiap fraksi akan mempengaruhi kelimpahan Gastropoda yang berada di dalamnya. Oleh karena itu, perlu dilakukan penelitian mengenai hubungan substrat dengan kelimpahan Gastropoda, karena Gastropoda salah satu faktor penting untuk menjaga keseimbangan ekologi pesisir khususnya ekositem mangrove. Penelitian  dilakukan di Hutan Mangrove Kulonprogo Yogyakarta bertujuan untuk mengetahui tipe substrat, kelimpahan Gastropoda dan hubungan kedua variabel tersebut. Penelitian  dilakukan pada bulan April sampai dengan  Mei 2017. Metode yang digunakan adalah metode deskriptif yaitu metode penelitian yang memberikan gambaran secara sistematis, faktual, akurat mengenai faktor-faktor dan sifat-sifat dari suatu daerah atau populasi. Metode pengambilan sampel substrat dan Gastropoda menggunakan metode Purposive Sampling Method pada 3 stasiun berbeda yaitu stasiun I pada bagian dekat pemukiman penduduk, stasiun II pada bagian dekat tambak, dan stasiun III pada bagian muara sungai. Hasil penelitian menunjukkan jenis substrat pada tiap stasiun adalah lempung dan lempung berdebu yang didominasi oleh fraksi lumpur (silt) dan pasir (sand). Jenis Gastropoda yang didapatkan berasal dari genus Littoraria, Natica, Faunus, Cerithium, Neritina, Polinices, Conus, Telescopium, dan Nerita. Meningkatnya prosentase fraksi pasir (sand) dan liat (clay) akan diikuti oleh meningkatnya kelimpahan Gastropoda, sedangkan untuk fraksi lumpur (silt) akan sebaliknya yaitu meningkatnya fraksi lumpur akan diikuti oleh menurunnya kelimpahan Gastropoda. Kata kunci: Tipe Substrat, Gastropoda, Mangrove, Kulonprogo  Mangrove substrates formed by sands, silts, and clays. Gastropods is a group of animals of the phylum of mollusks lives on the type of substrate from rough to smooth. Gastropod abundance is affected by substrate which habitat of gastropods and nutrients influencing the distribution of gastropods. Therefore, it needs a deeper research about the correlation of substrate and the amount of gastropods , because gastropods are the importants factor of mangrove ecosystem. The research helds in Kulonprogo Mangrove Forest, Yogyakarta, and the goals are to know the type of substrate, the amount of gastropods, and the correlation among them. This research held on April – Mei 2017. This research use descriptivemethod wich research method that provide a systematic, factual, accurate description of the factors and quality an area or population. The method on sampling sediments and gastropods is purposive sampling in 3 station. Station 1 near the settlement, station 2 near ponds, station 3 on the estuary. The results of this research shows that the sediments on every station are clay and dusty clay, which is dominated by silt,and sand fraction. The gastropods that obtained are Littoraria, Natica, Faunus, Cerithium, Neritina, Polinices, Conus, Telescopium, and Nerita. The percentage increasing on sands and clays fraction would be more gastropods. Otherwise on silts fraction.   

scholarly journals Effect of Silvofishery on Ponds Nutrient Levels (Pengaruh Silvofishery Terhadap Kandungan Nutrien di Tambak)

2014 ◽  
Vol 19 (2) ◽  
pp. 81 ◽  
Author(s):  
Anna Ida Sunaryo Purwiyatno ◽  
Fitri Agustriani
Keyword(s):  
Water Quality ◽  
National Parks ◽  
National Park ◽  
Sampling Method ◽  
Phosphorus Content ◽  
Nutrient Content ◽  
Pond Water ◽  
Quality Parameters ◽  
Mangrove Forests ◽  
Purposive Sampling

Taman Nasional Sembilang merupakan salah satu taman nasional yang terletak di Sumatera Selatan dan menjadi kawasan mangrove terbesar di barat Indonesia. Sebagian besar wilayah mangrovenya telah mengalami alih fungsi menjadi tambak pasang surut. Hal ini menyebabkan timbulnya kekhawatiran kerusakan mangrove di taman nasional. Salah satu upaya untuk mempertahankan wilayah mangrove adalah dengan melakukan sistem silvofishery, yaitu penanaman mangrove dan budidaya bandeng dilakukan secara bersamaan di tambak. Penelitian ini bertujuan untuk menganalisis kualitas air dan kondisi nutrien di tambak di daerah restorasi silvofishery di Taman Nasional Sembilang. Penelitian dilakukan dengan metode purposive sampling di tambak silvofishery, tambak non-silvofishery, dan badan air sungai di seluruh wilayah taman nasional. Pengukuran dilakukan terhadap parameter kualitas air dan kandungan nutrien khususnya nitrat dan fosfat. Hasil penelitian menunjukkan bahwa kehadiran tanaman mangrove di daerah tambak mampu memperbaiki kandungan oksigen dan pH air tambak. Mangrove juga menunjukkan kemampuan dalam mengikat nitrat yang secara tidak langsung akan mencegah air tambak dari polusi. Namun, kandungan fosfat tinggi menunjukkan bahwa tanaman mangrove muda di wilayah restorasi belum mampu mengikat nutrien ini secara signifikan. Hasil penelitian ini menunjukkan bahwa hutan mangrove sangat bermanfaat bagi kegiatan budidaya tambak karena kemampuannya dalam menyerap polutan nutrient. Kata kunci: silvofishery; kolam; nitrat; fosfat; Taman Nasional Sembilang Sembilang National Park is one of the national parks which is located in South Sumatera and became the largest mangrove area in western Indonesia. Most of the mangroves area in this national park has been experiencing conversion to be tidal ponds. This has resulted in concerns on mangrove forest destruction in the park. One of the efforts to maintain mangroves area is by applying silvofishery system, which is mangrove planting and cultivation of milkfish in ponds performed simultaneously. This study aims to investigate the water quality and nutrient condition in the ponds in the area of silvofishery restoration at Sembilang National Park. The study was conducted by purposive sampling method in the silvofishery ponds, non-silvofishery ponds, and river water bodies throughout the park. Measurements conducted on water quality parameters and nutrient content, especially nitrate and phosphate. The results showed that the presence of mangrove in the ponds area is able to improve the oxygen content and pH of pond water. Mangroves also demonstrated the ability to bind nitrates which indirectly will prevent the pond water from pollution. However, the high phosphorus content showed that young mangrove plants in the restoration area have not been able to significantly bind the of this nutrient. The results of this study showed that mangrove forests are very beneficial for aquaculture activities because of its ability to absorb nutrient pollutants. Keywords: silvofishery; ponds; nitrate; phosphate; Sembilang National Park

scholarly journals The spesies composition and distribution pattern of Gastropod at Forrest Mangrove Block Bedul Segoro Anak, Alas Purwo National Park

2014 ◽  
Vol 14 (2) ◽  
pp. 99
Author(s):  
Joko Swasono Adi ◽  
Sudarmadji Sudarmadji ◽  
Wachju Subchan
Keyword(s):  
Distribution Pattern ◽  
Mangrove Forest ◽  
National Park ◽  
Diversity Index ◽  
Abiotic Factors ◽  
Organic Content ◽  
Time Interval ◽  
Gastropod Species ◽  
Cerithidea Cingulata ◽  
Pattern Group

This research aims to determine the spesies compossition and distribution pattern of Gastropod and its relationship with abiotic factors (pH, salinity, soil texture, and organic content of the soil, and the high of tide of the eustuary area) in the Mangrove forest at Blok Beduk Segoro Anak Alas Purwo National Park. This research was conducted on February 2013. Data was taken four times using a week time interval during one month. Every observation covered eight stations, where station 1 to station 4 consist of four transects and 40 plots, while station 5 to station 8 consist of 3 transects with 42 plots and each plot was 5 m × 5 m. Gastropod observed from each plot are preserved with 70% alcohol and identified in Malakologi Laboratory, Indonesian Institute of Sciences (LIPI). Results of the research reveated that the Gastropod observed consist of 19 families and 37 species, and the dominant family is Ceritidae. The Diversity index of Shanon Wiener was 0.53 (low deversity). Two available of Distribution pattern, group (Canarium labiatum, Cassidula nucleus, Cerithium coralium, Chicoreus brunneus, Cassidula vespertilionis, Cerithidea cingulata, Cerithidea quadrata, Chicoreus capucinus,Conus rattus, Conus striolatus, Ellobium aurisjudae, Littorina carinifera, Littorina scabra, Monodonta labio, Nassarius melanoides, Nassarius olivaceus, Nerita balteata, Nerita planospira, Nerita undata, Pugilina ternatana, Sphaerassiminea miniata, Telescopium telescopium, Terebralia sulcata, Thais intermedia), random (Angaria delphinus, Conus catus, Conus omaria, Cymatium moniliferum, Erronea errones, Oliva oliva, Polinices aurantius, Pollia undosa, Tectus pyramis, Trochus californicus, Turbo argyrostoma). The abiotic factors had relatianship not significantly (p = 0.067) on Gastropod distribution pattern. Keywords : Distribution pattern,Gastropod, species compossition

scholarly journals Gastropods In Mangrove Forest Of Tongkeina Village, Bunaken Sub-District, City Of Manado

2019 ◽  
Vol 10 (1) ◽  
pp. 1
Author(s):  
Dewanti Y Talumingan ◽  
Ferdinand F. Tilaar ◽  
Jety K. Rangan ◽  
Maartinus M Baroleh ◽  
Victor N. R. Watung ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Mangrove Forest ◽  
Distribution Patterns ◽  
Common Species ◽  
Line Transect ◽  
Sampling Point ◽  
Mangrove Forests ◽  
Mangrove Species ◽  
Long Line ◽  
Made In

This research aims to determine the types or species of gastropod and its distribution in mangrove forests in Tongkeina village and to know the species of mangrove in Tongkeina village. The Research was conducted on one sampling point with one 100 meters long line transect which was is laid perpendicular to the outer direction of the mangrove.  To collect gastropod samples, three quadrates with a size of 10x10meters with a distance between the quadrate 5 meters were made. In the quadrate, 15 subquadrates sized 1x1meters were also made. Based on the results, there were 6 species of gastropods and two distribution patterns of i.e., Cluster the species of the Littoraria scabra, Angustassiminea castanea, Terebralia sulcate. The uniform distribution pattern is Ischinocerithium rostratum, Caliostoma jujubinum, and Nerita senegalensis. There are ten mangrove species found and  the most common species is Soneratia alba with a total of 27 individuals.Keywords: Gastropods, forest, Mangrove, Tongkeina village ABSTRAKPenelitian ini bertujuan untuk mengetahui Jenis-jenis gastropoda serta persebaran pada hutan mangrove di Kelurahan Tongkeina dan untuk mengetahui Jenis-jenis mangrove di Kelurahan Tongkeina. Penelitian hanya di lakukan satu titik pengambilan sampel dimana dibuat 1 line transek dengan Panjang 100meter yang di tarik tegak lurus dari arah terluar mangrove kemudian dibuat 3 kuadrat dengan ukuran 10x10meter dengan jarak antara kuadrat 5 meter, dan di dalam kuadrat dibuat 15 subkuadrat berukuran 1x1 meter. Berdasarkan penelitian hasil ditemukan ada 6 spesies gastopoda dan dua pola persebaran Gastropoda yaitu mengelompok dan seragam, spesies mengelompok yaitu Littoraria scabra, Angustassiminea castanea, Terebralia sulcate. Pola persebaran seragam yaitu Ischinocerithium rostratum, Caliostoma jujubinum, Nerita senegalensis. Mangrove ditemukan 10 Spesies yang terbanyak adalah Soneratia alba dengan jumlah 27 individu.Kata kunci: Gastropoda, Hutan, Mangrove, Kelurahan Tongkeina.

scholarly journals Kelimpahan Mikroplastik Pada Sedimen Ekosistem Terumbu di Taman Nasional Laut Karimunjawa

2020 ◽  
Vol 24 (1) ◽  
pp. 1-6
Author(s):  
Sakti Imam Muchlissin ◽  
Prastyo Abi Widyananto ◽  
Agus Sabdono ◽  
Ocky Karna Radjasa
Keyword(s):  
Coral Reef ◽  
National Park ◽  
Sampling Method ◽  
Initial Step ◽  
Asia Pacific ◽  
Conservation Areas ◽  
Marine Biotechnology ◽  
Purposive Sampling ◽  
Coral Reef Ecosystems ◽  
The Impact

Eleven billion microplastic particles are entangled in coral reef ecosystems in the Asia - Pacific Region. The presence of microplastics in coral reef ecosystems in Indonesia, especially in the Karimunjawa Marine National Park, was found as many as 22.7 and 12.8 particles / kilogram samples in two locations. The presence of microplastics in coral reef ecosystems allows threats to the health of coral reefs. Therefore, the importance of this study is to complement the data on the distribution of microplastics in the Karimunjawa Marine National Park as an initial step for conservation and mitigation of the impact of plastic/ microplastic pollution. Sampling using purposive sampling method. Sediment collection using SCUBA set and sediment grab at a depth of 3 - 5 meters. ± 1000 g of sediment was taken and stored in double zip lock plastic. The samples were then analyzed by microplastics in the Tropical Marine Biotechnology Laboratory, FPIK UNDIP. The results showed that the greatest abundance of microplastics was in the Karang Tengah area with the number of microplastics 96 particles / kilogram, and the farthest in the Ujung Gelam and Lego was 11 particles / kilogram. Research shows that the abundance of microplastics in areas with human activities such as tourism, ports, and boat routes has a high abundance compared to conservation areas or areas with little human activity. It is hoped that the available data from this type of research will be able to produce decisions on conservation measures in Karimunjawa Marine National Park.  Sebelas miliar partikel mikroplastik terjerat pada ekosistem terumbu karang di Kawasan Asia – Pasifik. Keberadaan mikroplastik pada ekosistem terumbu karang di Indonesia, khususnya di Taman Nasional Laut Karimunjawa, ditemukan sebanyak 22,7 dan 12,8  partikel/kilogram sampel di dua lokasi. Keberadaan mikroplastik di ekosistem terumbu karang memungkinkan adanya ancaman terhadap kesehatan terumbu karang. Oleh karena itu pentingnya penelitian ini untuk melengkapi data sebaran mikroplastik di Kawasan Taman Nasional Laut Karimunjawa sebagai langkah awal konservasi dan mitigasi dari dampak polusi plastik/mikroplastik. Pengambilan sampel menggunakan metode purposive sampling. Pengambilan sedimen menggunakan SCUBA set dan sediment grab pada kedalaman 3 – 5 meter. Sedimen diambil ± 1000 gr dan disimpan dalam plastik double zip lock. Sampel kemudian dianalisis mikroplastik di laboratorium Tropical Marine Biotechnology, FPIK UNDIP. Hasil menunjukkan bahwa kelimpahan mikroplastik terbesar pada daerah karang tengah dengan jumlah mikroplastik 96 partikel/kilogram, dan terkecil pada perairan ujung gelam dan lego yaitu sebanyak 11 partikel/kilogram. Penelitian menunjukkan bahwa kelimpahan mikroplastik didaerah dengan aktivitas manusia seperti pariwisata, pelabuhan, dan jalur kapal memiliki kelimpahan tinggi dibanding dengan daerah konservasi atau daerah dengan aktivitas manusia yang kecil. diharapkan dengan data yang tersedia dari penelitian sejenis ini, mampu menghasilkan keputusan terhadap langkah konservasi di Taman Nasional Laut Karimunjawa. 

scholarly journals Population and Distribution Pattern of Egretta alba in Lampung Mangrove Center

2018 ◽  
Vol 6 (3) ◽  
pp. 73
Author(s):  
Puja Anggriana ◽  
Bainah Sari Dewi ◽  
Gunardi Djoko Winarno
Keyword(s):  
Distribution Pattern ◽  
Mangrove Forest ◽  
Random Distribution ◽  
Total Population ◽  
Line Transect ◽  
Morisita Index ◽  
Index Value ◽  
Bird Distribution ◽  
Population Prediction ◽  
Research Analysis

Lampung Mangrove Center (LMC) is a location model as a dedication Lampung University in mangrove forest management that can be used for “Tridarma Perguruan Tinggi”, including research on greater egret (Egretta alba). Research conducted by large birds (E. alba) is important to do, as one of the conservation efforts in LMC. The purpose of this study was to determine the population and the distribution pattern of Greater egret (E. Alba). The methods used in the three locations are Line Transect method, GIS method, and Literature method. The research analysis using population prediction, total population and bird distribution pattern with Morisita Index. Results of the study with a total of 1620 minute studies found greater egret (E. Alba) on field locations 64 frequency, at pond location 66 frequency and at mangrove forest 8 frequency, so the total encounter of greater egret (E. Alba) are 138 frequency. The distribution pattern of Greater egret (E. Alba) life in LMC is the random distribution with a Morisita Index value is 0,27 and Hernowo population prediction of large egrets value is 8 individuals/ha and Nurhasanah total population is 12-13 individuals/ha. Keywords: greater egret bird, distribution pattern, population

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 KEPADATAN DAN POLA PENYEBARAN Ficus spp. DI STASIUN PENELITIAN CABANG PANTI TAMAN NASIONAL GUNUNG PALUNG KALIMANTAN BARAT

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Sumi Hadi ◽  
Rafdinal Rafdinal ◽  
Riza Linda
Keyword(s):  
Distribution Pattern ◽  
Random Sampling ◽  
National Park ◽  
Sampling Method ◽  
Tropical Region ◽  
Research Station ◽  
Freshwater Swamp ◽  
Key Species

Ficus is key species that commonly lives in tropical region because of its ability to bear fruit year around, thus so many kind of Ficus that become source of food and habitat to animals. The aim of the research to determine the density and distribution pattern of Ficus spp. at Research Station of Gunung Palung National Park in May until June 2018. The observation of Ficus spp. is done by random sampling method on five different locations, there are lowland granite, warmth, sands stone, freshwater swamp and alluvial land. The result showed that there are 4 species of Ficus with density ranges 16-60 individuals/ha and the distributions patterns are uniform and grouped.

scholarly journals Sebaran Horizontal Konsentrasi Nitrat Dan Fosfat Anorganik Di Perairan Muara Sungai Kendal Kabupaten Kendal

2018 ◽  
Vol 1 (1) ◽  
pp. 27-32
Author(s):  
Dwi Nur Hanifah ◽  
Sri Yulina Wulandari ◽  
Lilik Maslukah ◽  
Endang Supriyantini
Keyword(s):  
Distribution Pattern ◽  
Inorganic Phosphate ◽  
Sampling Method ◽  
Phosphate Concentration ◽  
Primary Data ◽  
Current Pattern ◽  
Purposive Sampling ◽  
Transition Area ◽  
Nitrate Concentrations ◽  
Near Shore

Muara sungai Kendal banyak dimanfaatkan untuk berbagai aktivitas masyarakat seperti pemukiman penduduk, industri, pertambakan dan Tempat Pelelangan Ikan. Aktivitas masyarat di sekitar sungai Kendal akan mempengaruhi kondisi perairan di muara sungai Kendal. Penelitian ini dilaksanakan pada bulan November 2017. Tujuan penelitian ini adalah untuk mengetahui sebaran konsentrasi nitrat dan fosfat anorganik secara horizontal di permukaan perairan muara sungai Kendal. Pengambilan sampel dilakukan pada 12 stasiun menggunakan metode purposive sampling dengan pertimbangan dapat mewakili wilayah muara sungai, dekat pantai, wilayah transisi dan laut. Data utama meliputi konsentrasi nitrat dan fosfat. Data pendukung meliputi suhu, salinitas, DO, pH dan kecerahan yang diukur secara langsung di lapangan, serta data yang diperoleh dari berbagai instansi terkait. Hasil penelitian menunjukkan bahwa konsentrasi nitrat dan fosfat semakin menurun menuju laut. Konsentrasi nitrat berkisar 2,1172 – 3,2459 µmol/l dan konsentrasi fosfat berkisar 0,1699 – 1,0437 µmol/l. Pola sebaran konsentrasi nitrat dan fosfat tidak mengikuti pola arus.   The estuary of Kendal is widely used for various activities such as residential, industrial, fishpond and fish auction places. Activity around the Kendal river will affect the conditions at the estuary of Kendal. This research was conducted in November 2017. The purpose of this research was to know the distribution of nitrate and inorganic phosphate concentration horizontally at surface of estuary Kendal. Sampling was conducted on 12 stations used purposive sampling method with consideration to represent the estuary, near shore, transition area and the sea. The Primary data included nitrate and phosphate concentrations. Supporting data included temperature, salinity, DO, pH and brightness measured directly in the field, as well as data obtained from various related agencies. The results showed that the concentration of nitrate and phosphate decreased toward the sea. Nitrate concentrations ranged from 2.1172 – 3.2459 µmol/l and phosphate concentrations ranged from 0.1699 – 1.0437 µmol/l. The distribution pattern of nitrate and phospate concentration did not follow the current pattern.

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