scholarly journals In Intertidal Gastropod community Malalayang Beach Manado North Sulawesi

2015 ◽  
Vol 3 (1) ◽  
pp. 36
Author(s):  
Cornelis Dimas Bugaleng ◽  
Fransine B. Manginsela ◽  
Alex D. Kambey
Keyword(s):  
Relative Density ◽  
Diversity Index ◽  
Intertidal Area ◽  
Dominance Index ◽  
Gastropod Species ◽  
Dead Coral ◽  
Sandy Substrate ◽  
North Sulawesi ◽  
A Value ◽  
Intertidal Gastropod

This study aims to determine the density and relative density of gastropods and diversity index of the community as well as evenness and dominance index in the intertidal beach Malalayang), Manado in North Sulawesi. Gastropods were sampled using quadrate with size 1x1m2 placed systematically and disproportionately on dead coral sandy substrate, mix mud, rocks slightly sandy substrate, and  substrate-sized stones. The study found that there has been a change in the amount of 30 species of gastropod species (Manginsela, 1998) increased to 69 species. While the density of gastropods contained in the intertidal beach of Malalayangis ranging from  13,63individu / m2to currently 2,73-13,63individu / m2 and relative density ranging from 11.22% - 42.78%. Diversity index of organism is high with a value of H '= 2.81497. Evenness index of gastropods in Malalayang Beach intertidalcould be categorized fairly even and almost evenly. Meanwhile, the low dominance values ​​C = 0.2132, indicating that the area has good conditions as a place to live, and yet there is competition, which means, food or a place is suitable for gastropods to live. The intertidal area of Malalayang Beach Manado North Sulawesi substrate are mainly in the form of sandy coral, slightly muddy and rocky. Keywords: gastropod, distribution A B S T R A K Penelitian ini bertujuan mengetahui kepadatan, kepadatan relative  dari masing-masing jenis gastropoda serta indeks keanekaragam komunitas gastropoda, kemerataan dan indeks dominansi di intertidal Pantai Malalayang (di belakang Minanga Hotel), Manado Sulawesi Utara. Pengambilan contoh gastropoda menggunakan kuadrat ukuran 1x1m2 yang ditempatkan secara sistimatis dan proporsional pada substrat karang mati berpasir campur lumpur, substrat bebatuan sedikit berpasir substrat batu-berukuran. Hasil penelitian menemukan telah terjadi perubahan jumlah spesies gastropoda dari 30 spesies (Manginsela, 1998) meningkat menjadi hanya 69 spesies. Sedangkan kepadatan gastropoda yang terdapat di intertidal pantai Malalayang dari berkisar 13,63individu/m2 saat ini 2,73-13,63individu/m2 dan kepadatan relatif berkisar 11,22% - 42,78%. Keanekaragaman jenis organisme tergolong tinggi dengan nilai H’ = 2,81497. Kemerataan jenis gastropoda pada intertidan Pantai Malalayang Manado Sulawesi Utara termasuk kategori cukup merata dan hampir merata. Sedangkan,  Dominasi rendah yakni nilai C = 0.2132,  menunjukkan bahwa daerah tersebut memiliki kondisi yang baik sebagai tempat hidup dan belum terjadi persaingan yang berarti terhadap ruangg, makanan atau tempat hidup bagi gastropoda. Di daerah intertidal Pantai Malalayang Manado Sulawesi Utara Substrat berupa karang mati berpasir, berlumpur tipis dan berbatuan. Kata Kunci : Gastropoda, Distribusi 1Mahasiswa Program Studi MSP FPIK-UNSRAT 2Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi

scholarly journals The Existence of Intertidal Gastropods in Malalayang Beach, North Sulawesi

2013 ◽  
Vol 1 (3) ◽  
pp. 132
Author(s):  
Irawati RJC Roring ◽  
Fransine B. Manginsela ◽  
Boyke H Toloh
Keyword(s):  
Relative Density ◽  
Distribution Pattern ◽  
Diversity Index ◽  
Dispersal Patterns ◽  
Dead Coral ◽  
Current Range ◽  
Sandy Substrate ◽  
North Sulawesi ◽  
Thin Smear ◽  
Intertidal Gastropod

ABSTRACT This study aims to determine the density, relative density and patterns of distribution of  gastropods and diversity index gastropod community in the intertidal Malalayang Beach (behind Minanga Hotel), North Sulawesi. Gastropods sampling using quadratic size 0.5x0.5 m2 placed systematically and proportionally on dead coral sandy substrate mix mud, rocks slightly sandy substrate and substrate-sized stones. The results found have been changes in the number of species of the 30 species of gastropods (Manginsela, 1998) now to only 15 species. While the density of intertidal Malalayang gastropods contained 0,13 and  the current range of 0.06 - 0.13  individu/m2 and relative density ranged from 2%-38.5%. Diversity index contained in the intertidal gastropod dead coral layered thin smear highest H' = 2.412 following the rocky region is H' = 2.232, and the lowest in the region b is H' = 2.059. Dispersal patterns in the intertidal gastropod are all randomized except Cypraea felina the distribution pattern of the group. Keywords : gastropod, distribution   ABSTRAK Penelitian ini bertujuan mengetahui kepadatan, kepadatan relatif  dan pola penyebaran dari masing-masing jenis gastropoda serta indeks keanekaragam komunitas gastropoda di intertidal Pantai Malalayang (di belakang Minanga Hotel), Propinsi Sulawesi Utara. Pengambilan contoh gastropoda menggunakan kuadrat ukuran 0.5x0.5 m2 yang ditempatkan secara sistimatis dan proporsional   pada substrat karang mati berpasir campur lumpur,  substrat bebatuan  sedikit berpasir substrat batu-berukuran. Hasil penelitian menemukan telah terjadi perubahan jumlah spesies gastropoda dari 30 spesies (Manginsela, 1998) menjadi hanya 15 spesies. Sedangkan kepadatan gastropoda yang terdapat di intertidal pantai Malalayang dari berkisar 0,13 individu/m2 saat ini 0,06-0,13 individu/m2 dan kepadatan relatif berkisar 2% - 38,5%. Indeks keanekaragaman gastropoda yang terdapat di intertidal karang mati berlapis lumpur tipis tertinggi adalah H’ = 2,412 menyusul kawasan berbatu adalah H’ = 2,232 serta terendah kawasan pada kawasan b adalah H’ = 2,059. Pola penyebaran gastropoda di intertidal ini semuanya acak kecuali Cypraea felina yang pola penyebarannya kelompok. Kata kunci : gastropoda, distribusi1 Bagian dari skripsi2 Mahasiswa Program Studi Manajemen Sumberdaya Perairan FPIK-UNSRAT 3 Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi 

scholarly journals Structure Community of Seagrass (Lamun) In The Village Beach Of Mokupa Tombariri Subdistrict, Minahasa District North Sulawesi.

2015 ◽  
Vol 3 (1) ◽  
pp. 16
Author(s):  
Feybe H. A Zachawerus ◽  
Alex D. Kambey ◽  
Rose O. S. E. Mantiri
Keyword(s):  
Relative Density ◽  
Diversity Index ◽  
Thalassia Hemprichii ◽  
Dominance Index ◽  
Enhalus Acoroides ◽  
Seagrass Community ◽  
North Sulawesi ◽  
Cymodocea Rotundata ◽  
Abundance And Diversity ◽  
The Village

Seagrass community of Mokupa Beach waters, Tombariri sub-district, Minahasa Regency North Sulawesi was selected as study site to get information regarding the distribution, abundance, and diversity of species. Five species were identified in this study are as follow: Cymodocea rotundata, Thalassia hemprichii, Halopila ovalis, Halodule pinifolia, and Enhalus acoroides. T. hemprichii had the highest density among those 5 species with 80.266 individuals/m2, relative density 45.709 % and score of dominance index (C) 0.3269. Among three transects deployed in the study site, transect III has the highest diversity index representing by ‘H = 1.3072. The result showed that seagrass community could grow well in the area which is also shown through similar score of evenness index.Keywords: Seagrass, diversity, dominance A B S T R A K Komunitas Lamun di Perairan Desa Mokupa Kecamatan Tombariri, Kabupaten Minahasa Sulawesi Utara sebagai lokasi penelitian untuk mendapatkan informasi tentang distribusi, kelimpahan dan keanekaragaman spesies. Diperoleh 5 spesies yaitu : Cymodocea rotundata, Thalassia hemprichii, Halopila ovalis, Halodule pinifolia, Enhalus acoroides. Kepadatan spesies yang tertinggi adalah Thalassia hemprichii 80,266 ind/m2. Kepadatan relatif (%) yang tertinggi adalah Thalassia hemprichii 45,709 %. Nilai indeks dominasi (C) (0,3269). Nilai keanekaragaman tertinggi dari ketiga transek terdapat pada transek III dengan nilai (Hʹ) 1,3072. menunjukan bahwa komunitas ini masih dapat tumbuh dengan baik di daerah tersebut. Hal ini juga ditunjang dengan nilai kemerataan yang hampir sama di ketiga transek penelitian.                                                                               Kata Kunci : Lamun, keanekaragaman, dominasi1Mahasiswa Program Studi MSP FPIK-UNSRAT2Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi

scholarly journals Community Structure of Gastropod in Seagrass on Intertidal Area in The Tongkeina Village of Manado City

2013 ◽  
Vol 1 (3) ◽  
pp. 102
Author(s):  
Gladys L Saripantung ◽  
Jan FWS Tamanampo ◽  
Gaspar Manu
Keyword(s):  
Community Structure ◽  
Population Density ◽  
Relative Density ◽  
Sampling Methods ◽  
Diversity Index ◽  
Intertidal Area ◽  
Gastropod Species ◽  
Relative Population ◽  
Study Sites ◽  
Index Value

ABSTRACT Gastropod community is one of the important components of the food chain in the seagrass beds. The purpose of this study is to identify the types of gastropods and to determine population density, relative population density, species diversity, dominance and species associations of gastropod community at three study sites in Tongkeina, Manado city. The study sites were Bahowo, Batu Meja and Rap-Rap. Data were collected by sampling methods using quadratic transect technique. The study was conducted from November to December 2012. Over all, 20 species of gastropods comprising 7 families in 4 orders were collected. Among all sites, the highest density of 35,64 individuals/m2 was found in Bahowo site and the lowest density of 14,84 individuals/m2 was found in Rap-Rap site. The highest relative density was found at Batu Meja site, shown by Columbella versicolor species with relative density of 55.9%. Diversity index ranged from 1,4786 (Batu Meja) – 1,9382 (Rap-Rap). Batu Meja site shown an index value of C = 0,35 which indicating that there is dominance by 2 species, i.e.Columbella vesicolor and Columbella rusticoides, in that site.Associations between gastropod species at all three locations formed either positive or zero association, whereas negative associations between gastropod populations were not found. Keywords : community structure, gastropods, seagrass, Tongkeina, Manado  ABSTRAK Komunitas gastropoda merupakan salah satu komponen penting dalam rantai makanan di padang lamun.  Tujuan penelitian ini adalah mengidentifikasi jenis gastropoda dan mengetahui kepadatan populasi, kepadatan relative populasi, keanekaragaman spesies, dominasi dan asosiasi antar spesies gastropoda yang telah dilakukan pada tiga lokasi penelitian di kelurahan Tongkeina kota Manado. Pengambilan data dilakukan dengan metoda sampling yang menggunakan teknik transek kuadrat. Waktu penelitian pada bulan November sampai Desember 2012.  Berdasarkan hasil penelitian, diperoleh 20 spesies gastropoda yang terdiri dari 7 famili dalam 4 ordo. Kepadatan tertinggi dari semua stasiun adalah Stasiun Bahowo yakni 35,64 ind/m2, Stasiun Rap-Rap adalah stasiun yang memiliki kepadatan terendah dari ketiga stasiun penelitian yakni 14,84 ind/m2. Kepadatan relative tertinggi terdapat di Stasiun 1 (Batu Meja) yaitu pada spesies Columbella versicolor dengan kepadatan relatif  55,9 %. Indeks keanekaragaman berkisar 1,4786 (Batu Meja)–1,9382 (Rap-Rap). Stasiun Batu Meja dengan nilai indeks C=0,35 menunjukan 2 spesies yang mendominasi yakni Columbella vesicolor dan Columbella rusticoides. Asosiasi antara spesies gastropoda di ketiga lokasi membentuk asosiasi positif dan asosiasi nol, sedangkan asosiasi negative antara populasi gastropoda tidak ditemukan. Kata kunci : struktur komunitas, gastropoda, lamun, Tongkeina, Manado

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 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 KEANEKARAGAMAN JAMUR MAKROSKOPIS DI KAWASAN AIR TERJUN CURUG EMBUN KOTA LUBUKLINGGAU

2021 ◽  
Vol 4 (1) ◽  
pp. 26-32
Author(s):  
Erni Afrita ◽  
Ria Dwi Jayati ◽  
Reny Dwi Riastuti
Keyword(s):  
Relative Density ◽  
Diversity Index ◽  
Schizophyllum Commune ◽  
Sampling Technique ◽  
Species Evenness ◽  
Dominance Index ◽  
Descriptive Data ◽  
Edible Species ◽  
Evenness Index ◽  
Quantitative Descriptive

This study aims to determine the types, diversity index, species evenness index, dominance index, and relative density of macroscopic fungi in the Waterfall area of ​​Curug Embun, Marga Bakti Village, North Lubuklinggau District I. This research is quantitative descriptive. Data collection techniques in this study using the roaming method with sampling using purposive sampling technique. The results of the analysis of the macroscopic fungal diversity index in the Curug Embun Waterfall area were 1.3530, the species evenness index was 0.4516, the dominance index was 0.4776 and the highest relative density was 68.027%.  There are 3 edible species and 17 non-edible mushrooms. 17 species of macroscopic mushrooms in the Waterfall area of ​​Curug Embun were found. The diversity index, dominance, and Simpson index are in the medium category. Schizophyllum commune is the most commonly found species.  

Community structure of seaweed beds in Mantehage Island, North Sulawesi, Indonesia

2015 ◽  
Vol 3 (2) ◽  
pp. 32 ◽  
Author(s):  
Hartarto Sormin ◽  
Grevo S. Gerung ◽  
Unstain N.W.J. Rembet
Keyword(s):  
Diversity Index ◽  
Current Speed ◽  
Line Transect ◽  
Caulerpa Racemosa ◽  
Dominance Index ◽  
Food Industries ◽  
North Sulawesi ◽  
Speed Range ◽  
Line Transect Method ◽  
Bahasa Indonesia

Title (Bahasa Indonesia): Struktur komunitas rumput laut di Pulau Mantehage, Provinsi Sulawesi Utara Seaweeds are an important marine resource for coastal community. They are used as medicine, paper materials, biofuel and direct consumption as vegetable or in food industries. Data collection in Mantehage island used Seagrass Watch method combined with line transect method with quadrat. This study found 29 species of seaweeds consisting of 13 species of Chlorophyta, 4 species of Phaeophtya and 12 species of Rhodophyta. Water temperatures ranged from 28–30ºC and pH ranged from 8.14–8.69, while salinity ranged between 30.8–31.9 ppt. Mantehage island waters has 100 % visibility with the current speed range of 30–42 cm/sec. INP of Caulerpa racemosa has the highest value at all sites. Diversity index ranged from 0.799–1.093 considered as low and dominance index ranged between 0.635–0.697 categorized as normal. Eveness index ranged from 0.303–0.365 showing that the seaweed community was under pressures. Rumput laut pada saat ini menjadi komoditas penting bagi masyarakat pesisir. Manfaat rumput laut selain dikonsumsi juga dijadikan sebagai obat, bahan baku kertas dan biofuel. Data di pulau Mantehege dikumpulkan menggunakan metode Seagrass watch yang dikombinasikan dengan metode transek garis dan kuadran. Ditemukan 29 spesies rumput laut yang terdiri dari 13 alga hijau Clorophyta, 4 alga cokelat Phaeyophtya dan 12 alga merah Rhodophyta. Substrat pada lokasi penelitian berupa karang mati dan batu karang. Suhu di perairan Pulau Mantehage di lokasi penelitian berkisar 28–30ºC. pH di lokasi penelitian yaitu 8,14–8,69 dengan salinitas berkisar 30,8–31,9 ppt. Kecerahan di Pulau Mantehege yaitu 100% dan kecepatan arus di kisaran 30–42 cm/detik. Nilai INP Caulerpa racemosa mempunyai nilai tertinggi pada semua lokasi. Indeks Keanekaragaman (H’) pada semua lokasi didapat berkisar 0,799–1,093 yang dikategorikan rendah dan biasa. Nilai Indeks Dominasi (D) pada semua lokasi berkisar antara 0,635–0,697 yang dikategorikan sedang. Indeks Keseragaman (J’) berkisar 0,303–0,365 yang menggambarkan komunitas pada kondisi tertekan.

scholarly journals Community Structure of Macro Algae in Mokupa Village, Tombariri Sub-district, Minahasa District, North Sulawesi Province

2015 ◽  
Vol 3 (1) ◽  
pp. 30
Author(s):  
Rini M Wowor ◽  
Rene Charles Kepel ◽  
Laurence J. L Lumingas
Keyword(s):  
Diversity Index ◽  
Community Diversity ◽  
Sea Waves ◽  
Species Diversity Index ◽  
Gracilaria Edulis ◽  
Sargassum Polycystum ◽  
Sandy Substrate ◽  
North Sulawesi ◽  
Index Value ◽  
Macro Algae

Sumich (1992) divided the structure of algae into  3 main parts namely: blade,the leaf like structure which is thin and wide, stipe, trunk like form that elastic to withstand sea waves, and holdfast, known as root-like form function to anchor the plant on the substrate. The study was conducted Mokupa beach waters sub-district Tombariri, Minahasa district. Mokupa coastal waters known to have typical ecosystem found in the tropics such as mangrove forest, coral reef and seagrass beds as well as macro algae community. The area is flat-bed coast with sandy substrate, sandy-silt substrate and rocky-sand substrate. Species of macro-algae found in this area consist of 7 species namely Halimeda macroloba, H. opuntia, Padina minor, Sargassum polycystum, Gracilaria edulis, G. firma, and Udotea orientalis. In general species density for all transect deployed  in the study site Halimeda macroloba has the highest index value, while for species diversity index transect II showing the highest value.   Keywords: Alga, community, diversity, dominance A B S T R A K Sumich (1992) membagi struktur alga menjadi 3 bagian utama yaitu blade yang merupakan struktur yang menyerupai daun yang pipih biasanya lebar, stipe yaitu struktur yang menyerupai batang yang lentur digunakan sebagai penahan hempasan ombak, dan holdfast yaitu bagian dengan bentuk seperti akar yang berfungsi untuk meletakkan tubuh pada substrat. Penelitian ini dilaksanakan di perairan pesisir Desa Mokupa, Kecamatan Tombariri, Kabupaten Minahasa. Daerah pesisir Desa Mokupa merupakan daerah yang lokasinya terdapat ekosistem yang khas di daerah tropis yaitu mangrove, terumbu karang, dan padang lamun, demikian pula terdapat komunitas alga makro. Profil dari pantai tersebut adalah pantai yang landai dengan substrat pasir, pasir berlumpur dan pasir berbatu. Jenis alga makro yang ditemukan di lokasi penelitian berjumlah 7 spesies, yaitu Halimeda macroloba, H. opuntia, Padina minor, Sargassum polycystum, Gracilaria edulis, G. firma, dan Udotea orientalis. Secara keseluruhan kepadatan spesies untuk semua transek yang tertinggi adalah Halimeda macroloba, sedangkan keanekaragaman jenis alga makro tertinggi terdapat di transek II.   Kata Kunci : keanekaragaman, alga, komunitas 1Mahasiswa Program Studi MSP FPIK-UNSRAT 2Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi

scholarly journals The Community of Chlorophyta as Bioindicator of Water Pollution in Pandanduri Dam District of Terara East Lombok

2021 ◽  
Vol 20 (3) ◽  
pp. 546
Author(s):  
Zikriah Zikriah ◽  
Imam Bachtiar ◽  
Lalu Japa
Keyword(s):  
Water Pollution ◽  
Diversity Index ◽  
Selenastrum Capricornutum ◽  
Species Diversity Index ◽  
Dominance Index ◽  
Species Dominance ◽  
Community Activities ◽  
A Value ◽  
Wiener Diversity Index

The Pandanduri Dam has a function as a support for agricultural irrigation water and also supports community activities so that it will affect the quality of its waters. The quality of the water needs to be analyzed because it can affect the aquatic ecosystem. This study aims to determine the level of water pollution in the Pandanduri Dam based on the phytoplankton community from the Chlorophyta Division. This type of research is descriptive exploratory. Sampling was carried out at 5 stations that were haphazardly selected with ecological representativeness consideration. Phytoplankton data were analyzed using the abundance formula, Shannon-Wiener diversity index, PIELOU uniformity index, and Simpson dominance index. The phytoplankton from the Chlorophyta Division found in the Pandanduri Dam were 14 species that are Pediastrum duplex var. Gracillimum, Gonium sp. 1, Gonium sp. 2, Coelastrum reticulatum, Scenedesmus acuminatus, Cosmarium sp., Chlamydomonas nasuta, Chlamydomonas sp., Selenastrum capricornutum, Monoraphidium dybowskii, Monoraphidium contortum, Monoraphidium irregular, Westella botryoides, and Kirchneriella lunaris consisting of 4 orders (Sphaeropleales, Chlorococcales, Chlamydomonadales and Desmidiales) and 10 genera (Pediastrum, Coelastrum, Scenedesmus, Gonium, Cosmarium, Chlamydomonas, Selenastrum, Monoraphidium, Westella, and Kirchneriella). The species diversity index of 2.21 is classified as moderate diversity, the species uniformity index is 0.83 which indicates even species growth, and the species dominance index indicates that no species dominates with a value of 0.12. The level of water pollution in the Pandanduri Dam was found in the moderate pollution category (oligotrophic).

scholarly journals Struktur Komunitas Zooplankton di Perairan Pulau Panjang dan Teluk Awur, Kabupaten Jepara

2018 ◽  
Vol 7 (1) ◽  
pp. 37
Author(s):  
Rodhiyah Patmawati ◽  
Hadi Endrawati ◽  
Adi Santoso
Keyword(s):  
Sampling Method ◽  
Diversity Index ◽  
Dominance Index ◽  
Purposive Sampling ◽  
Marine Tourism ◽  
High Category ◽  
A Value ◽  
Evenness Index ◽  
Average Abundance ◽  
High Level

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.

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