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Rafdinal Rafdinal
Jurusan Biologi Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Tanjungpura
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Komposisi dan Tingkat Kerusakan Vegetasi Hutan Mangrove di Kecamatan Sukadana Kabupaten Kayong Utara Provinsi Kalimantan Barat Riza Linda, Febrry Harnanda, Rafdinal,
Jurnal Protobiont Vol 7, No 1 (2018)
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/protobiont.v7i1.23628

Abstract

Mangrove forests grow on tropical coasts or embouchures with soft soils and are flooded by the tide. The purpose of this study was to investigate composition and destruction level of Mangrove forests vegetation in Sukadana Sub-District of Kayong Utara Regency. The sample was taken on June 2017 by employing single plot method. The findings indicate that at the time of sampling and adult, 7 types of mangrove vegetation are identified, specifically Acanthus ilicifolius, Acrostichum speciosum, Avicennia alba, Bruguiera gymnorrhiza, Rhizophora apiculata, Ceriops decandra and Xylocarpus granatum are discovered at mangrove forests in Sukadana Sub-District of Kayong Utara Regency. The highest density of 780 trees/ha. Is found at Sutera Village at the stake phase and the lowest density of 128 trees/ha is located in the tree phase in Sejahtera Village. Diversity index (H’) of mangrove forest vegetation in Sukadana Sub-district is categorized as low to average (H’ = 0.57-1.28). Based on the total density of less than 1000 and the relative closure of less than 50% of the trees, therefore the extent of damage to mangrove forest vegetation in Kecamatan Sukadana Kayong Utara District is categorized as initial damage.
Pola Distribusi Aboveground Biomass Kawasan Hutan Mangrove Peniti Kalimantan Barat Rafdinal, Rafdinal; Rizalinda, Rizalinda; Minsas, Sukal
Life Science Vol 8 No 1 (2019): April 2019
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/lifesci.v8i1.29984

Abstract

This study aims to analyze the distribution pattern of aboveground biomass (AGB) in the mangrove ecosystem of West Kalimantan Safety. In addition, it also analyzes the differences in biomass and carbon stocks in the condition of mangrove forests. The study of the distribution pattern of AGB of mangrove forests was carried out between August and September 2018. Determination of the location of the study was based on a conceptual approach in the dimensions of spatial temporal that is using the Porposive Random Sampling method. Vegetation analysis was carried out by a single plot measuring 50 m x 50 m at each selected location. Based on vegetation analysis data it was found that the density of mangrove stands on the Peniti coast ranged from 38 to 185 ind /ha, with an average of 88.25 ± 66.15 ind./ Ha. The AGB of pinch mangrove forests ranged from 8.85 to 84.82 Mg / ha with the largest total AGB distributed in the stand diameter class of more than 80 cm. Penelitian ini bertujuan untuk menganalisis pola distribusi aboveground biomass (AGB) pada ekosistem mangrove Peniti Kalimantan Barat. Selain itu juga untuk menganalisis perbedaan biomassa, dan cadangan karbon pada kondisi hutan mangrove. Kajian pola distribusi AGB hutan mangrove Peniti dilakukan antara bulan Agustus dan September 2018. Penentuan lokasi penelitian didasarkan pada pendekatan konseptual dalam dimensi spasio temporal yaitu menggunakan metode Porposive Random Sampling. Analisis vegetasi dilakukan dengan metode petak tunggal berukuran 50 m x 50 m pada setiap lokasi terpilih. Berdasarkan data analisis vegetasi didapatkan bahwa kerapatan tegakan mangrove di pesisir Peniti berkisar antara 38 sampai 185 ind/ha, dengan rata-rata 88,25±66,15 ind./ha. AGB tegakan hutan mangrove Peniti berkisar antara 8,85 sampai 84,82 Mg/ha dengan total AGB terbesar terdistribusi pada kelas diameter tegakan lebih dari 80 cm.
BENTUK LAPORAN DAN TUGAS PENGAMBILAN KEPUTUSAN DENGAN MENGGUNAKAN INFORMASI KEUANGAN: SUATU INVESTASI EKSPERIMEN LABORATORIUM RAFDINAL RAFDINAL; NUR INDRIANTORO
Jurnal Bisnis dan Akuntansi Vol 2 No 1 (2000): Jurnal Akuntansi dan Bisnis
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Sekolah Tinggi Ilmu Ekonomi Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1333.797 KB) | DOI: 10.34208/jba.v2i1.376

Abstract

The technology of compugraphy that can result in and present the accounting information in the graphic form of all kinds is one presentation alternatives from the traditional table form (Ives, 1982). The presentation form change and information quantity is one of the basic options to increase the decision maker's performance (Libby 1981, p. 101). The variable of decision maker's performance is implied by the accurateness of the response and time period. The approach use to find the increase of decision maker's performance is laboratoraty experiment and Manova (multivariance analysis of variance) is used to analyze the discrepancies. There are two independent variables. The variable of presentation form is developed into four kinds adopted by Davis (198) i.e. table form, block diagram, line diagram and pie diagram. Variable of decision maker's task is adopted from the study of Hard and Vanecek (1991): accumulation, treatment, estimation, projection. The subjects of this study are the postgraduate students of Gadjah Mada University, consisting of the department of Management Magister Manajemen (MM) and the department of Science Magister (MSi) students. The subjects analyzed are 204 students (MSi and MM are 128 and 86 students respectively) obtained from the total subjects of 214 students. The result of the study shows that there are differences of decision maker performance in using financial statement affected by interaction among presentation forms and the deccision maker task. The result supports the study by Davis (1989) who found that question answered and the presentation form have interactive influence on the performance, and there is no best presentation form have interactive influence on the performance, and there is no best presentation in all circumtances. In other word, presentation form will result in the decision maker performance in different tasks, and it is also true in the opposite way.
Estimasi Cadangan Karbon Kawasan Taman Wisata Hutan Mangrove Kecamatan Sukadana, Kabupaten Kayong Utara, Kalimantan Barat Adityo Raynaldo; Etha Marista; Sofi Siti Shofiyah; Riza Linda; Rafdinal Rafdinal
Jurnal Kelautan Vol 15, No 1: April (2022)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v15i1.11170

Abstract

ABSTRACTAn assessment of the potential of mangrove forests in the Kayong Utara Regency in storing carbon has not been published scientifically before, so scientific data on this matter will be able to support efforts to conserve and utilize mangrove forests in this Regency. This study aims to estimate the carbon stock and carbon sequestration of mangrove vegetation in Mangrove Forest Tourism Park, Sukadana District, Kayong Utara Regency. The estimation of biomass, carbon stock and carbon sequestration was carried out by non-destructive methods using observation plots at several purposively selected sampling locations. The estimation results of the total vegetation biomass from Above-ground Biomass (AGB) and Below-ground Biomass (BGB) from each observation plot ranged from 281.31 – 974.10 Mg ha−1 and the total vegetation carbon stock (AGC and BGC) ranged from 126.32 – 439.03 Mg C ha−1. Analysis of the total CO2 sequestration of mangrove vegetation at the site ranged from 463.58 to 1611.24 Mg CO2 ha−1. Maintenance of mangrove forests at this site can prevent the release of non-organic carbon (CO2) with considerable potential.Keywords: Carbon sequestration, mangrove biomass, mangrove tourism, total vegetation carbonABSTRAKPenilaian mengenai potensi hutan mangrove di Kabupaten Kayong Utara dalam menyimpan karbon belum terpublikasi secara ilmiah sebelumnya, sehingga data ilmiah mengenai hal ini akan dapat mendukung upaya pelestarian dan pemanfaatan hutan mangrove di Kabupaten ini. Penelitian ini bertujuan untuk mengestimasi potensi cadangan dan serapan karbon vegetasi mangrove di Kecamatan Sukadana, Kabupaten Kayong Utara. Estimasi biomassa, cadangan dan serapan karbon dilakukan dengan metode non-destruktif menggunakan plot-plot pengamatan pada beberapa lokasi pengambilan sampel yang dipilih secara purposif. Hasil estimasi total biomassa vegetasi dari Above-ground Biomass (AGB) dan Below-ground Biomass (BGB) dari tiap plot pengamatan berkisar antara 281,31 – 974,10 Mg ha−1 dan total cadangan karbon vegetasi (AGC dan BGC) berkisar antara 126,32 – 439,03 Mg C ha−1. Analisis total serapan CO2 vegetasi mangrove di lokasi berkisar antara 463,58 – 1611,24 Mg CO2 ha−1. Pemeliharaan kawasan hutan mangrove di lokasi dapat mencegah pelepasan karbon non organik (CO2) yang memiliki potensi cukup besar.Kata kunci: Biomasa mangrove, serapan karbon, total karbon vegetasi, wisata mangrove
DIVERSITY OF MYCORRHIZAL FUNGI IN THE RHIZOSPHERE OF Avicennia officinalis (L.) IN THE PENITI MANGROVE FOREST, MEMPAWAH REGENCY Riza Linda; Rafdinal Rafdinal
JERAMI : Indonesian Journal of Crop Science Vol 4 No 2 (2022): JIJCS
Publisher : Department of Crop Science, Faculty of Agriculture, Andalas University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jijcs.4.2.64-69.2022

Abstract

Mycorrhizal fungi are a form of mutualistic symbiosis between fungi and plant roots, including mangrove api-api that grows on mangrove area. This study aims to determine the diversity of mycorrhizal fungi on mangrove api-api (Avicennia officinalis L.) This study used a combination of wet filtering and centrifugation techniques for spore isolation. The results showed that the types of mycorrhizal fungi found in mangrove area were Scutellospora, Gigaspora, Acaulospora Glomus sp1, Glomus sp2, Glomus sp3 and Glomus sp4. The diversity of mycorrhizal fungi in Peniti area was 0,07105 and Sungai Purun was 0,47280. the distribution of species is uneven, there are species that dominate and conditions are unstable. Spore density of 103 spores /100 gr soil and level of root infection percentage with low class (class 1) was 0,24% in Peniti dan 0,18 % in Purun River.
Pelatihan Diversifikasi Olahan Rumput Laut Bagi Masyarakat Pulau Lemukutan, Kabupaten Bengkayang Sukal Minsas; Afghani Jayuska; Muliadi Muliadi; Neva Satyahadewi; Rafdinal Rafdinal
Jurnal Buletin Al-Ribaath Vol 19, No 1 (2022): Buletin Al-Ribaath
Publisher : Universitas Muhammadiyah Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/br.v19i1.3701

Abstract

Pulau Lemukutan merupakan salah satu daerah penghasil rumput laut di Kabupaten Bengkayang dengan Bingke merupakan panganan khas Pontianak yang bercitarasa tinggi dan telah dibuat dalam olahan dasar yang bervariasi. Cara pembuatannya yang mudah Rumput laut merupakan salah satu komoditas daerah Pulau Lemukutan, Kabupaten Bengkayang. Desa Pulau Lemukutan merupakan salah satu daerah penghasil rumput laut di Kalimantan barat. Rumput laut yang dibudidayakan pada umumnya jenis Euchema cottoni. Tujuan kegiatan ini adalah untuk peningkatan keterampilan dan pengetahuan dalam bidang kewirausahaan dalam pengolahan pangan lokal berbasis rumput laut. Kegiatan PKM ini telah dilaksanakan pada bulan Juni 2021 di Balai Desa Pulau Lemukutan Kalimantan Barat. Mitra PKM ini adalah ibu-ibu yang tergabung dalam anggota PKK (Pemberdayaan Kesejahteraan Keluarga) Desa Pulau Lemukutan, Kalimantan Barat. Permasalahan yang dihadapi ibu-ibu PKK belum pernah mendapatkan pelatihan terkait olahan rumput laut. Oleh karena itu dilakukan kegiatan peningkatan keterampilan berupa pelatihan pengolahan rumput laut. Metode yang dilakukan dalam PKM ini adalah ceramah, praktik, tanya jawab, demontrasi, dan diskusi. Manfaat dari kegiatan PKM ini adalah adanya peningkatan pengetahuan dan kesadaran terkait manfaat rumput laut terhadap kesehatan sebagai asupan gizi yang optimal untuk memperkuat daya imun tubuh, kemudian meningkatnya keterampilan peserta PKM dalam membuat bingke, bakso dan nugget dengan pangan lokal berbasis rumput laut sehingga dapat dijadikan olahan pangan yang berdaya jual tinggi. Kegiatan PKM ini telah meningkatkan pengetahuan, kesadaraan dan keterampilan akan pengolahan pangan bebasis rumput laut.
Density and Spread Pattern of Carnivore Plant (Nepenthes spp.) In The Area of Sebomban Hill Bonti District, Sanggau Ternisius Apriyanto; Rafdinal Rafdinal; Sukal Minsas
Jurnal Biologi Tropis Vol. 21 No. 3 (2021): September - Desember
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v21i3.2839

Abstract

Nepenthes spp. is kind of plant that arranged ecosystem in West Kalimantan, especially in the Sebomban hill area, Sanggau Regency. But, its existence is threatened so that several species are included in the endangered category according to the Convention on International Trade in Endangered Species (CITES). The research aims to determine species, community structure, anddistribution patterns of Nepenthes spp. in the area of Sebomban hill, Bonti District, Sanggau Regency. The research method used purposive samplingand systematic sampling with transect. The results showed that there are 3 types of Nepenthes spp. namely N. ampullaria, N. mirabilis and N, gracilis. The density value of Nepenthes spp. ranged from 10 - 45 individual/ ha. The index of importance value of Nepenthes spp. ranged from 42% - 134%, the highest value being Nepenthes ampullaria in location III, while the lowest value was found in location I, namely N. gracilis. All Nepenthes spp. those found at the research location have a pattern of distribution as clustered.
PENINGKATAN KOMUNIKASI INFORMASI AKUNTANSI MENGGUNAKAN GAMBAR KARTUN Febrianto, Rahmat; Rafdinal, Rafdinal
Jurnal Akuntansi dan Keuangan Indonesia Vol. 3, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research is aimed to answer how accounting information users classify accounting information when they are presented in different forms. Specifically, this research investigate whether users can efficiently and effectively classify failed and non-failed corporations. The results show that respondents are most efficient when they classify ac­ counting Information using Chemoffs schematic faces than any forms o f conven­ tional accounting information. The effectiveness o f Chemoffs schematic faces is also evidenced when compared to other forms o f accounting information presenta­tion.
Physical Chemical Characterization, Determination of Antioxidant Activity and Phytochemical Screening of Gambir Claw Herbal Tea (Uncaria gambir) Lucky Hartanti; Asri Mulya Ashari; Rita Kurnia Apindiaty; Gusti eva Tavita; Rafdinal Rafdinal; Desriani Lestari; Warsidah Warsidah
Jurnal Biologi Tropis Vol. 22 No. 4 (2022): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v22i4.4334

Abstract

Uncaria gambir is a member of Rubiaceae family. Information related to antioxidants and the use of this plant in the food and cosmetic industry has been widely reported. This study aims to determine the physicochemical properties, phytochemical content and antioxidant activity of herbal tea made from gambir claw, which was collected from the Pontianak City area of ​​West Kalimantan. Determination of physicochemical properties is based on measuring the parameters of pH, water content, ash content and organoleptic including taste, odor and color when dissolved in water. Phytochemical screening was carried out using specific reagents to determine the presence of flavonoid compounds, tannins, alkaloids and saponins. Antioxidant activity was determined using the free radical scavenging method 2,2-diphenyl-1-picrylhydrazyl (DPPH). From the results of the measurement of the physical and chemical properties of gambir claw herbal tea, the pH, ash content, moisture content and powder conditions met the requirements of SNI No 3836 of 2013, phytochemical screening showed positive results for flavonoid and tannin compounds, and antioxidant activity was obtained at 88,398 ppm, classified as a strong antioxidant.  
Analysis of Lead (Pb) Heavy Metal Content in Tengkuyung Snail (Cerithidea obtuse) and Sediment in the Kuala Mangrove Area of Singkawang City Rafdinal Rafdinal; Riza Linda; Gusti eva Tavita; Bambang Kurniadi; Anthoni B Aritonang
Jurnal Biologi Tropis Vol. 22 No. 4 (2022): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v22i4.4403

Abstract

Tengkuyung (Cerithidea obtuse) is one of the many snails that live in mangrove areas, being a source of food and the economy, especially for people in coastal areas. Land and sea development and transportation activities have the potential to become a source of Pb contamination in tengkuyung and its environment. This study aims to determine the concentration of lead metal (Pb) in sediments and tengkuyung in the Kuala mangrove area of Singkawang City. Sampling was carried out at two station points. Measurement of heavy metal lead (Pb) in sediments and tengkuyung was carried out using atomic absorption spectrophotometry (SAA) method. The results showed that the content of lead (Pb) in the sediment and tengkuyung at station 1 was 0.0914 µg/g and <0.0070 (µg/g), while at station 2 it was 0.3927 µg/g and <0.0070 (µg/g). The content of Pb metal in tengkuyung meat still meets the eligibility for consumption because it is below the threshold according to SNI no. 7387 in 2009, which is 0.5 mg/kg (0.5 ppm).
Co-Authors Adityo Raynaldo Afghani Jayuska Alfariz, Surya Abi Andari, Desti Andi Denisa Fadliah Nur Andini, Veronika Annisa Aulia Fahmi Anthoni B. Aritonang Ari Hepi Ari Hepi Yanti Ari Hepi Yanti Ashari, Asri Mulya Bambang Kurniadi Desriani Lestari Diah Wulandari Rousdy Dina Oktaviani Azra Dwi Gusmalawati Eko Subrata Eko Subrata Elvi Rusmiyanto Pancaning Wardoyo, Suci Lestari, Mukarlina, erli, erli Ester Yulinda Etha Marista Fadliah Nur, Andi Denisa Fahmi, Annisa Aulia Firman Saputra Firman Saputra Firman Saputra Fitri, Anjelina Gusti Eva Tavita Gusti Hardiansyah Hadi, Sumi Herlinda, Lira Indra, Sutarto Kusuma Irtiawati, Irtiawati Irwan Lovadi Irwan Lovadi Irwan Lovadi Jeno Jeno Junardi Junardi Junardi Junardi Juniarty, Syffa Kardina, Megawati Kustiati Kustiati Kustiati Lestari, Lulu Dwi Lucky Hartanti Lucky Hartanti, Lucky Maryadi, Andi Masnur Turnip Masnur Turnip Megawati - Meisia, Lili Minsas, Sukal Muhammad Fajar Muhammad Yuda Putratama Mukarlina, Mukarlina Muliadi Muliadi Neva Satyahadewi NUR INDRIANTORO Rahmat Febrianto Rahmawati, Rahmawati Renianda Rikhsan Kurniatuhadi, Rikhsan Rita Kurnia Apindiati Rita Kurnia Apindiati Rita Kurnia Apindiaty Riyandi Riyandi Riyandi Riyandi Riza Linda Riza Linda Robin Saputra Selpi, Selpi Shofiyah, Sofi Siti Sholihin, Nur Siti Ifadatin Siti Ifadatin Siti Khotimah Siti Nurbaiti Sofi Siti Shofiyah Sukal Minsas Surya Abi Alfariz Ternisius Apriyanto Tri Rima Setyawati Turnip, Masnur Venia Nur Warsidah Warsidah Warsidah, Warsidah Wendy Kristianto Wibowo, Anggi Zibar, Zan Zulfa Zakiah