scholarly journals Recruitment of hard coral after coral bleaching in Krueng Raya Water, Aceh Besar

2021 ◽  
Vol 869 (1) ◽  
pp. 012043
Author(s):  
M Ulfah ◽  
A Siswanto ◽  
S Agustina ◽  
S Purnawan
Keyword(s):  
Coral Reef ◽  
Coral Bleaching ◽  
Sampling Method ◽  
Systematic Sampling ◽  
Hard Coral ◽  
Coral Recruitment ◽  
Coral Genus ◽  
Study Results ◽  
Coral Reef Ecosystems ◽  
Systematic Sampling Method

Abstract Krueng Raya waters is an area that has a distribution of coral reef ecosystems. This study aims to determine the recruitment of hard corals after coral bleaching Krueng Raya waters, Aceh Besar District. This research was conducted in April 2017 in Krueng Raya, Aceh Besar. Data were collected at three observation stations using a systematic sampling method using a 1x1 m quadratic transect. Based on the study results, coral recruitment was obtained from eight families and 13 genera (Acropora, Cetenactis, Diploastrea, Favia, Favites, Galaxea, Goniastrea, Helliopora, Leptastrea, Montastrea, Pavona, Pocillopora, and Porites). Where the most abundant coral genus found was from the genus Pocilopora and Porites (16 coloni/10m2). while the station with the highest colony abundance was at station 3 with 28 colonies/10m2.

scholarly journals HARD CORAL (SCLERACTINIA) RECRUITMENT BASED ON THE GEOMORPHOLOGY ZONE IN BINTAN ISLAND WATERS, RIAU ISLANDS

2021 ◽  
Vol 13 (2) ◽  
pp. 269-281
Author(s):  
Nurhasima ◽  
Aditya Hikmat Nugraha ◽  
Dedy Kurniawan
Keyword(s):  
Coral Reef ◽  
Reef Flat ◽  
Sampling Method ◽  
Life Form ◽  
T Test ◽  
Reef Slope ◽  
Hard Coral ◽  
Coral Recruitment ◽  
Line Parallel ◽  
Coral Reef Ecosystems

The health of coral reef ecosystems can be seen through the emergence of coral recruitment. Aim of this research was to compared the scleractinia coral recruitment list based on genus, life form, and variations in size of the scleractinia coral recuit in the waters of Kampung Baru Lagoi and Teluk Bakau Village, Bintan Regency by geomorfology zone. The research was conducted using a Purposive sampling method in consideration of the presence of scleractinia coral in reef flat and reef slope areas using a 1x1 m square frame mounted along a 70 m transverse line parallel to the shoreline. Research has found 164 colonies of 24 genus dominated by Favia and Favites. Based on the most extensive life form of Coral encrusting and Coral massive variations in size 4.5-6 cm or medium category. The results of t test showed that the geomorphological differences in the research locations did not have a significant impact on the abundance of corals recruitment

scholarly journals KARAKTERISASI DAN IDENTIFIKASI GENUS BAKTERI ENDOFIT DARI DAUN DAN BATANG JERUK SIAM (Citrus nobilis var. microcarpa) SEHAT DI DESA ANJUNGAN KALIMANTAN BARAT

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Lusiana Fitriani Silalahi ◽  
Mukarlina Mukarlina ◽  
Rahmawati Rahmawati
Keyword(s):  
Endophytic Bacteria ◽  
Sampling Method ◽  
Systematic Sampling ◽  
Biological Control Agents ◽  
Isolation And Identification ◽  
West Kalimantan ◽  
Horticultural Crops ◽  
Study Results ◽  
Stems And Leaves ◽  
Systematic Sampling Method

Endophytic bacteria that live in the tissues of plant organs act as biological control agents and growth accelerator such as for plants Siam Orange (Citrus nobilis var. microcarpa) which is included in main commodity horticultural crops in West Kalimantan. This study was aimed to know the genera of endophytic bacteria from healthy Siam Orange stems and leaves. The study was conducted through the steps of endophyte bacteria isolation, and identification. Systematic sampling method was used and data collected were descriptively analyzed. The study results obtained nine isolates from leaves of Bacillus, Micrococcus, Pseudomonas, Erwinia, Microbacterium, Cellulomonas and one unidentified isolate, one isolate from stems of Micrococcus.

scholarly journals The change of coral cover in Ujong Pancu waters, Peukan Bada Sub-District, Aceh Besar

2021 ◽  
Vol 869 (1) ◽  
pp. 012051
Author(s):  
M Ulfah ◽  
M Muliari ◽  
F Azzahara ◽  
N M Razi ◽  
M R Fazillah ◽  
...  
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Coral Cover ◽  
Hard Coral ◽  
Ecological Functions ◽  
Coral Genus ◽  
The Earth ◽  
Coral Reef Ecosystems ◽  
Hard Coral Cover

Abstract Coral reef ecosystems are one of the most productive ecosystems on the earth, with large ecological functions. The disruption of coral reef ecosystems has a significant impact on the surrounding biota. This study aims to determine the condition of coral reefs for the last three years in Ujong Pancu waters, Peukan Bada sub-district, Aceh Besar district. This study uses data in 2017, 2018, and 2019 with three observation locations: Lhok Keeutapang, Lhok Mata Ie, and Tuan Island. The method used is Point Intercept Transect (PIT) with a transect length of 20 m with four repetitions. The results showed that the percentage of hard coral cover in the Ujong Pancu waters decreased from the good category (50.31%) in 2017 to moderate (47.81%) in 2019. The percentage with the highest coral cover was at the Lhok Keutapang location at 72, 81% in 2018, while the lowest coral cover at the Tuan Island location was 15.94% in 2017. The composition of the coral genus found also decreased from 12 coral genera (2017) to 9 coral genera (2019).

scholarly journals Developing a systematic sampling method for earthworms in and around deadwood

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Frank Ashwood ◽  
Elena I. Vanguelova ◽  
Sue Benham ◽  
Kevin R. Butt
Keyword(s):  
Sampling Method ◽  
Systematic Sampling ◽  
Systematic Sampling Method

scholarly journals PRODUKSI KELAPA SAWIT (Elais guineensis Jacq.) DENGAN SISTEM PEREMAJAAN YANG BERBEDA

2020 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
Nasamsir Nasamsir ◽  
Edi Romadoni
Keyword(s):  
Light Intensity ◽  
Soil Ph ◽  
Oil Palm ◽  
Crop Production ◽  
Sampling Method ◽  
Plant Production ◽  
Survey Method ◽  
Systematic Sampling ◽  
Physical Plant ◽  
Systematic Sampling Method

Abstract This study aims to determine the production of oil palm with a different replanting system. The study was conducted in the area of simultaneous fallen replanting system and underplanting system area located in Panca Mulya Village, Sungai Bahar District, Muaro Jambi Regency. The material used in this study was the Tenera variety of oil palm plants aged 4.5 years and 5.5 years. The study used a survey method with systematic sampling method. The main variables observed were plant production as well as physical plant additional variables, soil pH, light intensity, temperature, and humidity. The results showed that the replanting system significantly affected the production of oil palm plants and plant physicality, soil pH, light intensity, temperature, and air humidity. Palm oil crop production is higher in areas with simultaneous fallen replanting systems. Key words: replanting system, oil palm

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 PENGARUH JARAK TANAM TERHADAP PRODUKTIVITAS KAKAO (Theobroma cacao L.) DI DESA BETUNG KECAMATAN KUMPEH

2019 ◽  
Vol 4 (2) ◽  
pp. 59
Author(s):  
Hayata Hayata ◽  
Selly Febrina
Keyword(s):  
Theobroma Cacao ◽  
Seed Weight ◽  
Soil Acidity ◽  
Sampling Method ◽  
Systematic Sampling ◽  
Plant Spacing ◽  
Air Humidity ◽  
Plant Area ◽  
Systematic Sampling Method ◽  
Theobroma Cacao L

Arrangement of planting spacing with a certain density aims to give a plant area for each grow well. Planting spacing will affect its density and efficiency useness of light, water and nutrients using competition among the plants so finally it will affect its production. This study purposed  to determine the productivity of cocoa plants at different planting space. The research had been carried out in the community cocoa farming in Betung Village, Kumpeh Muaro Jambi District, Jambi Province, in March - April 2019. Cacao on Ten-year-old Lindak varieties were planted in a farm with plant spacing in  long and wide as 4,2 x 4,5 m (L1) and 5,5 x 6,0 m (L2). Systematic sampling method was applied and the observed variables were wet and dry seed weight, productivity, plant height, soil acidity, air temperature and humidity. The results showed that cocoa  planted in  long and wide as  5,5 x 6,0 m (L2)  gave better on both wet seed produced and dry beans productivity than those planted at  4,2 x 4,5 m (L1). The air humidity at 4,2 x  4,5 m (L1) was higher than in 5,5 x  6,0 m (L2).Keywords: cocoa, spacing, productivity AbstrakPengaturan jarak tanam dengan kepadatan tertentu bertujuan memberi ruang tumbuh pada tiap-tiap tanaman agar tumbuh dengan baik. Jarak tanam akan mempengaruhi kepadatan dan efisiensi penggunaan cahaya, persaingan diantara tanaman dalam penggunaan air dan unsur hara sehingga akan mempengaruhi produksi tanaman. Tujuan penelitian adalah untuk mengetahui  produktivitas tanaman kakao pada jarak tanam yang berbeda. Penelitian telah dilaksanakan di kebun kakao rakyat Desa Betung Kecamatan Kumpeh Muaro Jambi Provinsi Jambi, pada bulan Maret – April 2019. Tanaman kakao Varietas Lindak berumur sepuluh tahun yang ditanam pada kebun dengan jarak tanam P 4,2 x L 4,5 m (L1) dan P 5,5 x L 6,0 m  (L2). Metode pengambilan sampel Systematic Sampling dan peubah yang diamati adalah, berat biji basah, berat biji kering, produktivitas, tinggi tanaman, pH tanah, suhu dan kelembaban udara. Hasil penelitian menunjukkan bahwa Tanaman kakao yang ditanam dengan jarak P 5,5 x L 6,0 m (L2) menghasilkan produksi biji basah dan biji kering serta produktivitas yang lebih baik bila dibandingkan dengan  yang ditanam pada jarak P 4.2 x L 4.5 m (L1).  Kelembaban udara pada P 4.2 x L 4.5 m (L1) lebih tinggi dari pada (P 5.5 x L 6,0 m (L2).Kata kunci : kakao, jarak tanam, produktivitas

scholarly journals Early trajectories of benthic coral reef communities following the 2015/16 coral bleaching event at remote Aldabra Atoll, Seychelles

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Anna Koester ◽  
Valentina Migani ◽  
Nancy Bunbury ◽  
Amanda Ford ◽  
Cheryl Sanchez ◽  
...  
Keyword(s):  
Coral Reef ◽  
Water Temperature ◽  
Coral Bleaching ◽  
Coral Cover ◽  
Bleaching Event ◽  
Hard Coral ◽  
Reef Communities ◽  
Remote Sites ◽  
Hard Coral Cover ◽  
Coral Reef Communities

Abstract Documenting post-bleaching trajectories of coral reef communities is crucial to understand their resilience to climate change. We investigated reef community changes following the 2015/16 bleaching event at Aldabra Atoll, where direct human impact is minimal. We combined benthic data collected pre- (2014) and post-bleaching (2016–2019) at 12 sites across three locations (lagoon, 2 m depth; seaward west and east, 5 and 15 m depth) with water temperature measurements. While seaward reefs experienced relative hard coral reductions of 51–62%, lagoonal coral loss was lower (− 34%), probably due to three-fold higher daily water temperature variability there. Between 2016 and 2019, hard coral cover did not change on deep reefs which remained dominated by turf algae and Halimeda, but absolute cover on shallow reefs increased annually by 1.3% (east), 2.3% (west) and 3.0% (lagoon), reaching, respectively, 54%, 68% and 93% of the pre-bleaching cover in 2019. Full recovery at the shallow seaward locations may take at least five more years, but remains uncertain for the deeper reefs. The expected increase in frequency and severity of coral bleaching events is likely to make even rapid recovery as observed in Aldabra’s lagoon too slow to prevent long-term reef degradation, even at remote sites.

Frequency of Escherichia coli O157:H7 in Turkish Cattle

2002 ◽  
Vol 65 (10) ◽  
pp. 1637-1640 ◽  
Author(s):  
AYSUN YILMAZ ◽  
HUSEYIN GUN ◽  
HUSEYIN YILMAZ
Keyword(s):  
Escherichia Coli ◽  
Urease Activity ◽  
Sampling Method ◽  
Immunomagnetic Separation ◽  
Systematic Sampling ◽  
Escherichia Coli O157 ◽  
Macconkey Agar ◽  
E Coli ◽  
Systematic Sampling Method ◽  
Age And Sex

In this study, five abattoirs in Istanbul were visited between January 2000 and April 2001. During these visits, 330 cattle were selected by a systematic sampling method. Cattle were examined clinically and breed, age, and sex were recorded. Rectal swabs were taken immediately after slaughter. Immunomagnetic separation was performed, and sorbitol-negative colonies were selected on sorbitol MacConkey agar with cefixime and tellurite (CT-SMAC agar). These colonies were checked for 4-methylenebelliferyl-β-d-glucuronide, indol, rhamnose, and urease activity and motility. Serotypes of bacteria were determined by using antisera specific for Escherichia coli O157 and H7. All cattle selected were clinically healthy. Of 88 sorbitol-negative colonies selected on CT-SMAC agar, isolates from only 14 (4.2%) cattle reacted with anti-O157, and 13 of these isolates also reacted with anti-H7. E. coli O157:H7 was isolated from all breeds, but the numbers of isolates were largest for Holstein and Swiss Brown cows. E. coli O157:H7 was most frequently isolated from 2-year-old cattle. Similarly, it was most frequently isolated from male cattle. E. coli O157:H7 was isolated from cattle slaughtered in four of the five abattoirs studied.

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