scholarly journals Structure of Seagrass Community in the Karapyak Beach, Pangandaran Regency, West Java

2021 ◽  
pp. 27-39
Author(s):  
Ana Akmalia Putri Sutia ◽  
Herman Hamdani ◽  
Heti Herawati ◽  
Mochamad Rudyansyah Ismail
Keyword(s):  
Sampling Method ◽  
Marine Ecosystems ◽  
Survey Method ◽  
Frequency Diversity ◽  
Thalassia Hemprichii ◽  
Transect Line ◽  
Seagrass Community ◽  
Cymodocea Rotundata ◽  
Seagrass Density

Karapyak Beach is one of the beaches that has a variety of abundant marine ecosystems. One of the marine ecosystems is seagrass. This study aims to identify the structure of seagrass communities in Karapyak waters based on seagrass species, species density, species frequency, diversity, and uniformity. This research was conducted in February – April 2021. The method used is a survey method with direct observation at each predetermined station using a square transect measuring 1 x 1 m2. While the determination of stations and observation points is done by purposive sampling method. The research location is divided into three stations, each station is divided into five substations (plots), and a 50 m transect line is made perpendicular to the shoreline. Furthermore, the results showed four types of seagrass found in the waters of Karapyak Beach, namely Cymodocea rotundata, Thalassia hemprichii, Halodule pinifolia, Halodule uninervis. The density of seagrass at station I was in the medium category, namely 125 individuals/m2, with a cover percentage of 86%. Then the lowest seagrass density was found at the second station, which was 104 individuals/m2 including the unhealthy category with a cover percentage of 58%. While the highest density score was shown at the third station, namely 144 individuals/m2 with a closing percentage of 94%.

Perbandingan Perifiton pada Thalassia hemprichii dan Cymodocea rotundata di Perairan Teluk Awur, Jepara

2021 ◽  
Vol 10 (2) ◽  
pp. 225-232
Author(s):  
Chandra Nicolas Sihaloho ◽  
Nur Taufiq ◽  
Hadi Endrawati
Keyword(s):  
Sampling Method ◽  
Distribution Patterns ◽  
Survey Method ◽  
Line Transect ◽  
Sweep Method ◽  
Thalassia Hemprichii ◽  
Cymodocea Rotundata ◽  
Total Observation ◽  
Morisita Index ◽  
Seagrass Density

Keanekaragaman jenis lamun dan struktur morfologi yang cukup besar pada Thalassia hemprchii dan Cymodocea rotundata memungkinkan ditumbuhi perifiton yang dapat meningkatkan produktivitas primer. Penelitian ini bertujuan untuk mengetahui kelimpahan perifiton pada T. hemprichii dan C. rotundata di Perairan Teluk Awur, Jepara. Penelitian dilaksanakan pada Bulan Juli 2020 menggunakan metode survei dan penentuan lokasi dipilih dengan menggunakan metode purposive random sampling, sedangkan metode pengambilan data lamun dengan metode line transect quadrant yang mengacu pada metode LIPI. Pengambilan daun lamun untuk pengamatan perifiton menggunakan metode sapuan daun yang selanjutnya diamati dengan menggunakan metode sensus yaitu pengamatan total dengan alat sedgwick rafter di bawah mikroskop. Nilai kelimpahan perifiton pada daun lamun T. hemprichii sebesar 27.635 ind/cm2. Sedangkan kelimpahan perifiton pada daun lamun C. rotundata sebesar 23.015 ind/cm2. Kelimpahan tertinggi perifiton terdapat pada jenis lamun Thalassia hemprichii, hal ini diduga karena Thalassia hemprichii mempunyai penampang daun yang lebih lebar. Perifiton yang mendominasi di Perairan Teluk Awur berasal dari Kelas Bacillariophyceae, diduga karena kelas ini memiliki kemampuan melekat pada substrat yang baik. Berdasarkan perhitungan Indeks Morisita maka diketahui bahwa sebaran perifiton di Perairan Teluk Awur didominasi pola sebaran mengelompok. Kelimpahan perifiton dengan kerapatan lamun di Perairan Teluk Awur memiliki hubungan cukup erat.The considerable diversity of seagrass species and morphological structures in Thalassia hemprchii and Cymodocea rotundata allows the growth of periphyton which can increase primary productivity. This study aims to determine the abundance of periphyton and its distribution patterns in the waters of Teluk Awur, Jepara. The study, which was conducted in July 2020, used a survey method and the location was selected using the purposive sampling method, while the seagrass data collection method used the line transect quadrant method which refers to the LIPI method. Seagrass leaves were collected for periphyton observations using the leaf sweep method, which was observed using the census method, namely total observation using the sedgwick rafter under a microscope. The abundance value of periphyton in Thalassia hemprichii seagrass leaves was 27,635 ind/cm2. While the abundance of periphyton in seagrass leaves of Cymodocea rotundata was 23,015 ind/cm2. The highest abundance of periphyton is found in the type of seagrass T. hemprichii, this is presumably because T. hemprichii has a wider leaf cross section. The dominant periphyton in Teluk Awur waters comes from the Bacillariophyceae class, presumably because this class has good adherence to the substrate. Based on the calculation of the Morisita Index, it is known that the distribution of periphyton in the waters of Teluk Awur, Jepara is dominated by a clustered distribution pattern. The abundance of periphyton and seagrass density on Parang Island is closely related.

scholarly journals HUBUNGAN KERAPATAN LAMUN DENGAN KELIMPAHAN BULU BABI (Echinoidea) DI PANTAI PANCURAN TAMAN NASIONAL KARIMUNJAWA, JEPARA The Correlation of Seagrass Density with Abundance of Sea Urchins (Echinoidea) in Pancuran Beach Karimunjawa National Park, Jepara

2019 ◽  
Vol 8 (1) ◽  
pp. 28-36
Author(s):  
Rudi Sulistiawan ◽  
Anhar Solichin ◽  
Arif Rahman
Keyword(s):  
National Park ◽  
Sampling Method ◽  
Sea Urchins ◽  
Thalassia Hemprichii ◽  
Purposive Sampling ◽  
Moderate Density ◽  
Cymodocea Rotundata ◽  
Cymodocea Serrulata ◽  
Seagrass Density ◽  
Diadema Setosum

ABSTRAK Pantai Pancuran merupakan salah satu pantai yang berada di Taman Nasional Karimunjawa, Jepara. Pantai Pancuran memiliki ekosistem lamun yang masih baik. Ekosistem lamun dapat dijadikan habitat untuk biota-biota laut, seperti Filum Echinodermata. Salah satunya yaitu bulu babi (Echinoidea). Tujuan dari penelitian ini adalah untuk mengetahui kerapatan, komposisi lamun dan kelimpahan bulu babi, serta hubungan antara kerapatan lamun dengan kelimpahan bulu babi di Pantai Pancuran, yang dilaksanakan pada bulan Mei 2018. Metode penelitian yang digunakan adalah metode observasi. Metode pengambilan sampel menggunakan metode purposive sampling. Data yang diambil dalam penelitian ini adalah jenis lamun dan jumlah tegakannya, kelimpahan bulu babi. Kerapatan lamun dihitung berdasarkan kategori padat, sedang dan jarang dengan menggunakan transek 1x1 m dengan luasan 5x5 m dengan 3 kali pengulangan. Parameter kualitas air yang diukur yaitu suhu air, salinitas, pH, kedalaman, dan kecerahan. Analisis data yang dihitung yaitu indeks keanekaragaman, indeks keseragaman, indeks dominansi dan regresi. Hasil penelitian didapatkan jenis lamun yang ada di Pantai Pancuran yaitu Thalassia hemprichii, Enhalus acoroides, Cymodocea rotundata, dan Cymodocea serrulata. Spesies lamun yang paling banyak didapatkan yaitu jenis Thalassia hemprichii. Jumlah tegakan lamun di kerapatan padat didapatkan sebanyak 320 individu/m2, kerapatan sedang 179 individu/m2 dan kerapatan jarang 79 individu/m2. Spesies bulu babi yang ditemukan hanya Diadema setosum, pada kerapatan padat sebanyak 124 individu/75m2, kerapatan sedang sebanyak 144 individu/75m2 dan kerapatan jarang sebanyak 204 individu/75m2. Hubungan antara kerapatan lamun dan kelimpahan bulu babi di Pantai Pancuran memiliki hubungan yang tinggi r = 0,840 yang artinya kerapatan lamun yang tinggi ditemukan kelimpahan bulu babi yang rendah. ABSTRACT Pancuran beach is one of beaches in Karimunjawa National Park, Jepara. Pancuran Beach has a good seagrass ecosystem. Seagrass ecosystems as habitats for many marine life such as Phylum Echinodermata. One of them is Sea urchins (Echinoderms). The purpose of the research was to determine the density, composition of seagrass and abundance of sea urchins, and correlation between seagrass density to abundance of sea urchins at Pancuran beach at May 2018. Research methodology that used is observation method. The sampling method used purposive sampling method. The data in this research are the type of seagrass and the number of seagrass, and abundance of sea urchins. Seagrass density is calculated based on the category of dense, moderate and sparse by using 1x1 m transect with a 5x5 m area with 3 repetitions. Water quality parameters measured are temperature, salinity, pH, depth, and clarity. The analysis data that was calculated were diversity index, uniformity index, dominance index and regression. The result of the research found the types of seagrass in Pancuran Beach is Thalassia hemprichii, Enhalus acoroides, Cymodocea rotundata and Cymodocea serrulata. The dominant seagrass species obtained at 3 area are Thalassia hemprichii. The number of seagrass density was 320 individuals/m2, moderate density 179 individual/m2 and in the sparse density 79 individuals/m2. Sea urchin species that only have is Diadema setosum, at a dense density of 1,65 individuals/m2, moderate density of 1,92 individuals/m2 and a sparse density of 2,72 individuals/m2. Correlation between seagrass and abundance of sea urchins with r-coeff = 0,840.

scholarly journals PENGARUH KERAPATAN LAMUN Thalassia hemprichii TERHADAP KELIMPAHAN BAKTERI HETEROTROF DI PANTAI PRAWEAN, JEPARA

2018 ◽  
Vol 7 (4) ◽  
pp. 415-422
Author(s):  
Isnaini Dian Yunita ◽  
Niniek Widyorini ◽  
Supriharyono Supriharyono
Keyword(s):  
Heterotrophic Bacteria ◽  
Nutrient Cycle ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Seagrass Ecosystem ◽  
Halodule Uninervis ◽  
Cymodocea Rotundata ◽  
Economic Function ◽  
Seagrass Density

Ekosistem lamun merupakan salah satu ekosistem yang memiliki kompleksitas dan keanekaragaman hayati yang tinggi. Padang lamun merupakan hamparan vegetasi lamun yang menutupi suatu kawasan pesisir. Selain memiliki fungsi ekonomi, lamun juga memiliki fungsi ekologis yakni berperan penting sebagai pendaur zat hara oleh mikroorganime yaitu bakteri. Penelitian ini bertujuan untuk mengetahui kerapatan lamun, kelimpahan bakteri heterotrof yang berasosiasi dengan lamun serta pengaruh kerapatan lamun dengan kelimpahan bakteri heterotrof di Pantai Prawean, Jepara. Metode yang digunakan yakni deskriptif eksplanatif dengan pengambilan sampel secara purposive dan dianalisis dengan IBM SPSS Statistic 22. Jenis lamun yang ditemukan di Pantai Prawean ada 5 (lima): Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halodule uninervis dan Halodule pinifolia. Kerapatan tertinggi didapat dari jenis Thalassia hemprichii sebesar 78 Ind/m2 dan terendah adalah Enhalus acoroides 10 Ind/m2 dan kelimpahan bakteri heterotrof tertinggi diperoleh dari tingkat kerapatan rapat di stasiun 3 yakni 29,4x108 Upk/ml dan kelimpahan terendah diperoleh dari tingkat kerapatan jarang di stasiun 2 yakni 3,3x108 Upk/ml. Korelasi antara kerapatan lamun dengan kelimpahan bakteri heterotrof tinggi atau kuat yakni 0,896 dan korelasi ini dinyatakan sangat signifikan terbukti nilai sig. 0,001 dengan tingkat kesalahan 0,1%. Artinya bertambahnya kerapatan lamun dapat meningkatkan pula kelimpahan bakteri heterotrof. Seagrass ecosystem is one ecosytems that has high complexity and biodiversity. Seagrass beds are a stretch of seagrass vegetation that covers a coastal area. Beside its economic function, seagrass also have ecological function that play an important role of nutrient cycle for microorganism its bacteria. This study aims to determine the density of seagrass, the abundance of heterothropic bacteria and influence of seagrass density with abundance of heterotrophic bacteria at Prawean beach, Jepara. The method used in this study is descriptive explanative with purposive sampling and the data analyzed by IBM SPSS Statistic 22. There are 5 (five) species of seagrass that can be found in Prawean beach: Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halodule uninervis and Halodule pinifolia. The highest density obtained from Thalassia hemprichii species is 78 sprouts of seagrass/m2 and the lowest density obtained from Enhalus acoroides is 10 obtained from seagrass density at station 3 its value 29,4x108Cfu/ml and the lowest abundance of heterotrophic bacteria was obtained from rare seagrass at station 2 its value 3,3x108Cfu/ml.  The corelation between seagrass density with abundance heterotrophic bacteria is high or strong that has value 0,846 and this correlation is very significantly proven has sig value 0,001 with error rate 0,1%, it can be conclude that increase of seagrass density can also increase the abundance of heterotrophic bacteria.  

scholarly journals Kompensasi Memoderasi Pengaruh Partisipasi Penganggaran Pada Budgetary Slack

2019 ◽  
pp. 2460
Author(s):  
I Putu Widhi Nugraha Putra Suherman ◽  
Luh Gede Krisna Dewi
Keyword(s):  
Organizational Performance ◽  
Sampling Method ◽  
Good Governance ◽  
Survey Method ◽  
Budgetary Slack ◽  
Analysis Technique ◽  
Budgetary Participation ◽  
The Relationship ◽  
Positive Effect

This study aims to determine the effect of budgeting participation on budgetary slack in the Regional Organization of Badung Regency with moderated variable compensation. The population in this study were authorized officials in budgeting, namely 38 Badung District OPD. Determination of samples in this study using purposive sampling method. Total number of respondents was 143 respondents. The data collection method used is the survey method. The data analysis technique used is moderation regression analysis. The results of this study indicate that budgetary participation has a positive effect on budgetary slack, and compensation can weaken the relationship between budgetary participation and budgetary slack. The results of this study are expected to be able to provide a view for the parties involved in budgeting in the Badung District OPD so that decision making and policy determination in the future can minimize budgetary slack, improve organizational performance, and create good governance. Keywords: Budgeting participation, compensation, budgetary slack

scholarly journals Kandungan Nitrat dan Fosfat dalam Air Pori Sedimen dan Kolom Air di Daerah Padang Lamun Perairan Pantai Prawean, Bandengan, Jepara

2020 ◽  
Vol 9 (4) ◽  
pp. 464-473
Author(s):  
Eko Wardana Parsaulian Tampubolon ◽  
Ria Azizah Tri Nuraini ◽  
Endang Supriyantini
Keyword(s):  
Water Column ◽  
Pore Water ◽  
Descriptive Analysis ◽  
Nitrate Content ◽  
Seagrass Beds ◽  
Thalassia Hemprichii ◽  
Sediment Pore Water ◽  
Decomposition Of Organic Matter ◽  
Cymodocea Rotundata ◽  
Seagrass Density

ABSTRAK : Secara alamiah konsentrasi zat hara dalam perairan bervariasi untuk masing-masing bentuk senyawanya, termasuk nitrat dan fosfat. Lamun berperan penting terhadap sumbangan nutrien di perairan dengan hasil dekomposisi serasah lamun oleh mikroorganisme pengurai. Fungsi sistem lamun terletak pada pemahaman faktor-faktor yang mengatur produksi dan dekomposisi bahan organik serta efisiensi daur nutrisi dalam sistemnya. Penelitian ini bertujuan untuk mengetahui kandungan nitrat dan fosfat air pori sedimen dan kolom air serta mengetahui jenis dan jumlah kerapatan lamun yang terdapat di perairan Pantai Prawean Bandengan Jepara. Metode penelitian ini menggunakan analisis deskriptif. Analisa kandungan nitrat menggunakan metode analisis SNI 06-6989.31-2005 dan fosfat menggunakan metode analisis BP2-MU-A-08. Pengamatan lamun menggunakan transek kuadrat 50x50cm menurut panduan LIPI. Kandungan nitrat air pori sedimen berkisar 1,85 – 2,82 mg/l, tergolong sedang. Sedangkan kandungan nitrat kolom air berkisar 0,63 – 1,09 mg/l, tergolong rendah. Kandungan fosfat pada air pori berkisar 0,09 – 0,15 mg/l, tergolong sangat subur. Sedangkan kandungan fosfat kolom air berkisar 0,02 – 0,04 mg/l, tergolong cukup subur. Jenis lamun yang ditemukan pada lokasi penelitian sebanyak 4 spesies yaitu Enhalus accoroides, Thalassia hemprichii, Cymodocea serullata, dan Cymodocea rotundata. Kerapatan lamun tertinggi di stasiun 2 sebanyak 132 tegakan/m2 (rapat) sedangkan stasiun 1 sebanyak 95 tegakan/m2 (agak rapat) dan stasiun 3 sebanyak 123 tegakan/m2 (agak rapat). Lamun jenis Cymodocea serullata memiliki dominansi tertinggi pada setiap stasiun. ABSTRACT : Naturally the concentration of nutrients in the waters varies for eachthe form of its compounds, including nitrates and phosphates. Seagrass plays an important role in the contribution of nutrients in waters with the result of decomposition of  seagrass litter by decomposing microorganisms. The function of the seagrass system lies in understanding the factors that govern the production and decomposition of organic matter and the efficiency of nutrient cycling in the system. This research aims to determine the content of nitrate and phosphate in sediment pore water and water columns in the seagrass beds of Prawean Coast waters Jepara and determine the type and the amount of seagrass density. This research method uses descriptive analysis. Nitrate content analysis using SNI 06-6989.31-2005 and phosphate analysis using BP2-MU-A-08. Seagrass observations using the Transect squared 50x50cm according to the LIPI guidelines. The content of nitrates sediment pore water in the seagrass beds of Prawean Coast ranges from 1,85 to 2,82 mg/l, while the content of nitrate in water column ranges from 0,63 – 1,09 mg/l. The content of phosphate in pore water ranges from 0,09 – 0,15 mg/l, while the phosphate content of the water column ranges from 0,02 to 0,04 mg/l. Four types of seagrass found were Enhalus accoroides, Thalassia hemprichii, Cymodocea serullata, and Cymodocea rotundata. The highest seagrass density at station 2 was 132 stands/m2, while the station 1 was 95 stands/m2 and station 3 was 123 stands/m2. Seagrass type Cymodocea Serullata has the highest dominance at each station.Kata Kunci :   Nitrat, Fosfat, Air Pori Sedimen, Kolom Air, Lamun.

scholarly journals KOMUNITAS LAMUN DI PERAIRAN PANTAI DESA ORI, MALUKU TENGAH

2021 ◽  
Vol 17 (2) ◽  
pp. 97-103
Author(s):  
Sarah Haumahu ◽  
Frijona F Lokollo ◽  
Reni Ambon
Keyword(s):  
Coastal Waters ◽  
Line Transect ◽  
Seagrass Species ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Seagrass Community ◽  
Halophila Ovalis ◽  
The World ◽  
Cymodocea Rotundata ◽  
Frequency Of Occurence

Seagrass communities play an important role in marine environments and estuary area, supporting communities of fish, snails and shellfish and other invertebrates. The diversity of seagrass species in the world is very low (<60 species). The coastal waters of Ori Village have a seagrass community that has never been studied. The purpose of this study was to estimate the structure of the seagrass community in the coastal waters of Ori Village, Central Maluku which includes the composition of type, density, frequency of occurence and percent of coverage. Seagrass sampling uses the line transect method. Five species of seagrass were found during the study grouped into two families: Cymodoceaceae and Hydrocharitaceae. The seagrass species found were Cymodocea rotundata, Halodule pinifolia, Enhalus acoroides Halophila ovalis and Thalassia hemprichii. T. hemprichii and E. acoroides have the highest densities (157 shoots/m2 and 137 shoots/m2, respectively). E. acoroides and T. hemprichii also have the highest frequency of occurence and relative coverage percent compared to other seagrass species found in the waters of Ori Village. Seagrass community in the waters of Ori Village is classified in a tight condition until dense.   ABSTRAK Komunitas lamun memegang peranan penting di lingkungan laut dan daerah estuari, menyokong komunitas ikan, siput dan kerang-kerangan serta invertebrata lainnya. Keragaman spesies lamun di dunia sangat rendah (<60 spesies). Perairan pantai Desa Ori memiliki komunitas lamun yang belum pernah diteliti. Tujuan dari penelitian ini adalah untuk mengestimasi struktur komunitas lamun di perairan pantai Desa Ori, Maluku Tengah yang meliputi komposisi jenis, kerapatan, frekuensi kehadiran dan persen penutupan. Pengambilan sampel lamun menggunakan metode transek garis. Lima spesies lamun ditemukan selama penelitian yang dikelompokan dalam dua famili yaitu famili Cymodoceaceae dan Hydrocharitaceae. Spesies-spesies lamun yang ditemukan adalah Cymodocea rotundata, Halodule pinifolia, Enhalus acoroides Halophila ovalis danThalassia hemprichii. T. hemprichii dan E. acoroides memiliki kerapatan tertinggi (masing-masing 157 tegakan/m2 dan 137 tegakan/m2). E. acoroides dan T. hemprichii juga memiliki frekuensi kehadiran serta persen penutupan relatif tertinggi dibanding spesies-spesies lamun lainnya yang ditemukan di perairan Desa Ori. Komunitas lamun di perairan Desa Ori tergolong dalam kondisi rapat sampai padat.   Kata Kunci: Lamun, komunitas, kerapatan, penutupan, Maluku Tengah      

scholarly journals Keragaman Lamun (Seagrass) di Pesisir Desa Lihunu Pulau Bangka Kecamatan Likupang Kabupaten Minahasa Utara, Sulawesi Utara

Jurnal MIPA ◽  
2015 ◽  
Vol 4 (2) ◽  
pp. 20
Author(s):  
Zakiah Susanti Kamarrudin ◽  
Sendy B. Rondonuwu ◽  
Pience Veralyn Maabuat
Keyword(s):  
Random Sampling ◽  
Diversity Index ◽  
Wide Distribution ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Transect Line ◽  
Halophila Ovalis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Cymodocea Serrulata

Lamun adalah tumbuhan berbunga yang dapat tumbuh dengan baik pada lingkungan laut dangkal. Penelitian ini dilaksanakan di Pesisir Desa Lihunu dengan menggunakan metode purposive random sampling yang dilaksanakan pada bulan Agustus 2015 saat surut terendah. Analisis data meliputi perhitungan dengan menggunakan rumus menurut Shannon & Wienner dan buku identifikasi lamun. Berdasarkan hasil penelitian terdapat tujuh jenis lamun yang ditemukan yaitu, Enhalus acoroides (L.f.) Royle, Thalassia hemprichii (Ehrenberg) Ascherson, Cymodocea rotundata (Ehrenberg) Ascherson, Cymodocea serrulata (R. Brown) Ascherson, Halophila ovalis (R. Brwon) Hooker, Halodule pinifolia (Miki) den Hartog dan Syringodium isoetifolium (Ascherson) Dandy. Lamun Enhalus acoroides dan Thalassia hemprichii memiliki penyebaran terluas, karena ditemukan di seluruh transek pada lokasi penelitian. Jenis yang jarang dijumpai adalah Halophila ovalis dan Cymodocea serrulata. Jumlah individu lamun yang ditemukan adalah 2316 individu. Nilai indeks keanekaragaman di Pesisir Desa Lihunu memperlihatkan bahwa di wilayah ini keanekaragaman jenis lamun sedang dengan H’ = 1 ≤ H’ ≤ 3.Seagrass is flowering plants that can grow so well in shallow marine environments. This research was conducted in Seashore Lihunu Village on August 2015 using field observation with purposive random sampling when low withdraw. Data analysis was performed using the formula of Shannon-Wienner and identification of seagrass. Results obtained in this research showed that there are seven types of seagrass, namely Enhalus acoroides (L.f) Royle, Thalassia hemprichii (Ehrenberg) Ascherson, Cymodocea rotundata (Ehrenberg) Ascherson, Cymodocea serrulata (R. Brown) Ascherson, Halophila ovalis (R. Brwon) Hooker, Halodule pinifolia (Miki) den Hartog and Syringodium isoetifolium (Ascherson) Dandy. Enhalus acoroides and Thalassia hemprichii have wide distribution because they can be found in all transect line at research site. Species that are rarely found are Halophila ovalis and Cymodocea serrulata. Number of individual found was 2316 individuals. Value of diversity index at Seashore Lihunu Village showed that this area has moderate seagrass diversity with H’ = 1 ≤ H’ ≤ 3.

scholarly journals ANALISIS USAHATANI KANGKUNG (Ipomoea aquatica Forsk) DI DESA KAIMA KECAMATAN KAUDITAN KABUPATEN MINAHASA UTARA

2018 ◽  
Vol 13 (3A) ◽  
pp. 407
Author(s):  
Pedro R. P. Hutahaean ◽  
Mex L. Sondakh ◽  
Theodora M. Katiandagho
Keyword(s):  
Sampling Method ◽  
Secondary Data ◽  
Agricultural Extension ◽  
Primary Data ◽  
Survey Method ◽  
Selling Price ◽  
Land Area ◽  
Water Spinach ◽  
Ipomoea Aquatica

This study aims to analyze how the income of water spinach farmers (Ipomoea aquatica Forsk). This research was conducted in Kaima Village, Kauditan District, North MinahasaRegency and lasted from April 2016 until October 2017. The research method used in this research is survey method by interview all farmers of kangkung. Data collection method in this research is to use primary data through prepared list of questions that are obtained through direct interviews with farmers and secondary data from related agencies such as Head of Village Office, Statistic and Agricultural Extension Offices. Sampling method is the determination of saturated samples means that all water spinach farmers are used as a sample much as 6 respondents. The concept of measurement of variables in this study is the production, land area, selling price, revenue, expenditure, and supporting variables. Analysis of data used is the data obtained are presented in table form and analyzed descriptively. The results showed that the income of kangkung farming in Kaima Village, Kecamatan.Kauditan was beneficial.

scholarly journals KERAPATAN DAN DISTRIBUSI LAMUN (SEAGRASS) BERDASARKAN ZONA KEGIATAN YANG BERBEDA DI PERAIRAN PULAU PRAMUKA, KEPULAUAN SERIBU

2012 ◽  
Vol 1 (1) ◽  
pp. 44-50
Author(s):  
Fiki Feryatun
Keyword(s):  
Thalassia Hemprichii ◽  
Marine Animals ◽  
Natural Zone ◽  
Enhalus Acoroides ◽  
Halophila Ovalis ◽  
Halodule Uninervis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Cymodocea Serrulata ◽  
Seagrass Density

Lamun merupakan tumbuhan yang beradaptasi penuh untuk dapat hidup di lingkungan laut. Ekosistem lamun berperan penting di wilayah pesisir karena menjadi habitat penting untuk berbagai jenis hewan laut seperti ikan, moluska, crustacea, echinodermata. Penelitian yang dilakukan pada bulan April 2012 di Perairan Pantai Pulau Pramuka bertujuan untuk mengetahui komunitas lamun (jenis, kelimpahan, penutupan) dan distribusinya di berbagai zona di Perairan Pantai Pulau Pramuka, Kepulauan Seribu. Sampling dilakukan di tiga stasiun, yakni stasiun 1 (zona alami), stasiun 2 (zona pemukiman) dan stasiun 3 (zona resort wisatawan) menggunakan kuadran transek. Hasil yang didapatkan 7 jenis lamun yaitu Cymodocea rotundata, Cymodocea serrulata, Enhalus acoroides, Halodule uninervis, Halophila ovalis, Thalassia hemprichii dan Syringodium isoetifolium. Kerapatan lamun yang tertinggi diperoleh di stasiun 1 yaitu 1.620 individu/15m2. Berdasarkan Keputusan Menteri Negara Lingkungan Hidup No. 20 Tahun 2004 bahwa stasiun 1 (zona alami) dengan persentase penutupan 68% masuk kedalam kondisi sehat (penutupan > 60%), sedangkan untuk stasiun 2 (zona pemukiman) dan 3 (zona resort) dengan persentase masing-masing 59% dan 48% masuk dalam kategori kondisi kurang sehat (penutupan 30-59,9%). Pola sebaran (distribusi) lamun pada stasiun 1 mengelompok (cluster) dan seragam (uniform) untuk stasiun 2 dan 3, dengan demikian ada pengaruh dari kegiatan manusia terhadap komunitas lamun.Kata kunci : Lamun, Kerapatan dan Distribusi, Zona kegiatanAbstractSeagrasses are plants adapted to live fully in the marine environment. Seagrass plays an important role in coastal areas due to critical habitat for many kinds of marine animals such as fish, mollusks, crustaceans, echinoderms. The research was conducted on April 9 to 22, 2012 at Pramuka Island Coastal Waters in order to know seagrass community (type, abundance, coverage) distribution in different activity zones. The method used transect quadrates in three stations, namely stations 1 (natural zone), station 2 (residential zone) and station 3 (tourist resort zone). The results obtained 7 seagrass species that was of Cymodocea rotundata, Cymodocea serrulata, Enhalus acoroides, Halodule uninervis, Halophila ovalis, Thalassia hemprichii and Syringodium isoetifolium. The highest seagrass density was in station 1 the total 1620 individuals/15m2. Based on the Ministry of Environment No. 20 In 2004 the station 1 (natural zone) was in healthy condition (coverage > 60%), while for station 2 (residential zone) and 3 (resort zone) were in the category of unhealthy conditions (coverage 30 to 59,9%). The pattern of distribution of seagrass at stations 1 was clumped, however distribution it was cluster at station 2 and 3, thus there is the influence of human activities on seagrass communities.Keywords : Seagrass, Density and Distribution, Activity zones

scholarly journals KELAYAKAN USAHATANI KEDELAI DI LAHAN DARAT DAN LAHAN SAWAH

2019 ◽  
Vol 5 (2) ◽  
pp. 346
Author(s):  
Rian Kurnia ◽  
Trisna Insan Noor ◽  
Eliana Wulandari ◽  
Meddy Rachmadi
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Secondary Data ◽  
Paddy Fields ◽  
Primary Data ◽  
Survey Method ◽  
A Value ◽  
Cluster Random Sampling

This study aims to determine the feasibility of Soybean farming in dryland and paddy fields land in the Jatiwaras Subdistrict, Tasikmalaya Regency. The method used in this study is the survey method, while the data used consists of primary data and secondary data. Determination of sample farmers using the multistage cluster random sampling method. The number of respondents was taken as many as 36 farmers who were divided by farmers on 21 farmers on dryland and 15 farmers on wetland. The results of this study indicate that soybean farming in dryland is more feasible to cultivate with a value of R/C 1.98 while the value of R / C in wetland is 1.62.

Sign in / Sign up

Export Citation Format

Share Document