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Onrizal Onrizal
Departemen Kehutanan, Fakultas Pertanian Universitas Sumatera Utara Jin Tri Dharma Ujung.No. 1. Medan 20155.
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Resiliency of Singkil Coastal Vegetation due to Natural Catastrophes Onrizal Onrizal; Mashhor Mansor; Nurdin Sulistiyono
International Journal of Agriculture System VOLUME 3 ISSUE 2, DECEMBER 2015
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (797.396 KB) | DOI: 10.20956/ijas.v3i2.109

Abstract

Aceh Singkil west coast of Northern Sumatra was affected by natural catastrophes both tsunami and coastal deformation. Apparently most of the inter-tidal vegetation communities suffered because of the inundation intensity and duration changed. Investigation was carried on the structure and composition of littoral and mangrove forests in Singkil coast for 52 and 49 months after the 2004 and 2005 natural catastrophes, respectively. In each vegetation type, data were collected from four sampling plots, each measuring 30 m x 30 m. The sampling plots were separated into 10 m x 10 m sub-plots for matured trees and 5 m x 5 m sub-plots for smaller trees or shrubs. All plants within the subplots were identified and counted. Pure stand of littoral forests were dominated by Casuariana equisetifolia in the mature stage and Cerbera manghas in regeneration stages as natural regeneration. In the mangrove area, most of the mangrove trees such as Bruguiera gymnorrhiza, B. parviflora, and Rhizophora apiculata dead. Sonneratia caseolaris was higher survival rate compared than mangrove trees. B. gymnorrhiza seedlings were growing well. Mangrove palm Nypa fruticans populations were recorded growing well and with a good resiliency and persistence. In fact some of coastal vegetations both in coastal dry lands and in wetland forests have a good capacity to naturally restore and grow after the environmental destruction. From ecological point of view, these plant species should be selected for rehabilitation program in the natural catastrophes both tsunami and coastal subsidence as the impact of large earthquake could be reduced.
Kebiasaan Makanan Beberapa Jenis Ikan di Ekosistem Mangrove Lubuk Kertang, Sumatera Utara Ananingtyas S Darmarini; Desrita Desrita; Onrizal Onrizal
Jurnal Kelautan Tropis Vol 26, No 2 (2023): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v26i2.16143

Abstract

Mangrove ecosystems are very important for coastal waters, one of which is as a provider of food sources for biota in the surrounding waters. This study aims to determine the food habits of several types of fish found in the waters around the Lubuk Kertang mangrove ecosystem, Langkat, North Sumatra. The research location is a mangrove restoration area with the main species Rhizopora apiculata. The research was conducted in January 2021. The collection of fish samples was carried out using gill net with 1.5 inchi which is commonly used by fishermen. Sampling was carried out by spreading the net three times. The tested fish samples consisted of 46 individuals with 12 species, 9 families, and 6 orders. The highest number of fish caught was Clupeiformes with a percentage of 41.67%, while the order found with a low percentage was Beloniformes (2%). The families found in large numbers were Mugillidae, the families found in low numbers were Lutjanidae and Serranidae. The species caught the most is Chelon subviridis. Stomach contents analysis was performed with the Index of Preponderance (IP). Based on the type of food found in the stomach contents of the test fish, there were various types of food consisting of 11 types, namely phytoplankton, zooplankton, squid, fish (juvenile fish), crabs, shrimp, shellfish, litter, moss, pieces of insect bodies, and plant parts. The types of food that the plant fragments are found in are 9 fish species, phytoplankton (7 species), shrimp (7 species), and litter (5 species).  Ekosistem mangrove sangat penting bagi perairan salah satunya adalah sebagai penyedia sumber makanan biota pada perairan di sekitarnya. Penelitian ini bertujuan untuk mengetahui kebiasaan makanan beberapa jenis ikan yang ditemukan di perairan sekitar ekosistem mangrove Lubuk Kertang, Langkat, Sumatera Utara. Lokasi penelitian merupakan merupakan wilayah restorasi mangrove dengan vegetasi utama Rhizopora apiculata. Penelitian dilakukan pada bulan Januari 2021. Pengumpulan sampel ikan dilakukan dengan menggunakan jaring gill net dengan ukuran 1.5 inchi yang biasa digunakan oleh nelayan. Sampling dilakukan dengan melakukan tiga kali tebar jaring. Sampel ikan uji terdiri dari 46 individu dengan 12 spesies, 9 famili, dan 6 ordo. Jumlah ikan terbanyak yang tertangkap adalah Clupeiformes dengan persentase sebesar 41.67%, sedangkan ordo yang ditemukan dengan persentase yang rendah adalah Beloniformes (2%). Famili yang ditemukan dalam jumlah besar adalah Mugillidae, famili yang ditemukan dengan jumlah rendah adalah Lutjanidae dan Serranidae. Spesies yang paling banyak tertangkap adalah jenis Chelon subviridis. Analisis isi perut dilakukan dengan Indeks of Preponderance (IP). Berdasarkan jenis makanan yang ditemukan pada isi perut ikan uji, terdapat berbagai jenis makanan yang terdiri dari 11 jenis yaitu fitoplankton, zooplankton, cumi-cumi, ikan (juvenil ikan), kepiting, udang, cangkang kerang, serasah, lumut, potongan tubuh serangga, dan potongan tubuh tumbuhan. Jenis makanan potongan tumbuhan terdapat pada 9 spesies ikan, fitoplankton (7 spesies), udang (7 spesies) dan serasah (5 spesies). 
Mitigation of Food Crisis and Increasing Productivity of Rice Fields for Communities Around the Taman Asoka Asri Housing Amid the Covid-19 Pandemic Muhdi Muhdi; Diana Sofia Hanafiah; Onrizal; Samsuri; Batubara Ridwanti
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 1 (2021): ABDIMAS TALENTA : Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (856.108 KB) | DOI: 10.32734/abdimastalenta.v6i1.5144

Abstract

Currently, the global economy is shaken by the Covid-19 pandemic. Based on the results of the preliminary study at the partner's location, it has economic limitations, including the availability of food supply which has an impact on non-productive communities, including farmers and tenant farmers around Taman Asoka Asri Housing, Tanjung Selamet, Medan Tuntungan, Medan, North Sumatra. All activities that will be carried out by the USU PPM proposing team will of course follow and pay attention to the Covid-19 prevention protocol. The implementation of this community service is carried out in the vicinity of the Taman Asoka Asri Housing, so the activity plan that will be carried out is the use of rice fields for farmers and cultivators in the environment around the Taman Asoka Asri Housing. The area of ​​paddy rice fields managed by smallholders around the Taman Asoka Asri Complex, Tanjung Selamet, Medan Tuntung, Medan an average of 2,725 m2 (0.2725 ha). Rice field management areas that have been successfully managed by partners have become productive areas that can increase income and profits for smallholders.
Community perception toward mangrove restoration program in Kampung Nelayan Seberang, Medan Thoha, Achmad Siddik; Onrizal; Agus Purwoko; Alfan Gunawan Ahmad; Tika Yuana Sari
Global Forest Journal Vol. 2 No. 02 (2024): Global Forest Journal
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/gfj.v2i02.15693

Abstract

Indonesia has the largest mangrove forests in the world. However, Indonesia is also listed as the largest contributor to loss of the world's mangrove forests. Good mangroves will support the lives of coastal communities and vice versa. Mangrove forests in the area of Kampung Nelayan Seberang, Medan Belawan and its surroundings were also degraded. Therefore, degraded mangrove forests need to be restored through mangrove restoration activities with the involvement of the surrounding community. This community service activity through the Assisted Village Program will carry out mangrove restoration activities with the people of Kampung Nelayan Seberang. The success of restoration activities is determined by good understanding of the mangrove ecosystem and the commitment of the community to be involved in restoring it. The objective of this study was to identify understanding related to mangrove ecosystems and community perceptions of its restoration efforts. Collecting data was carried out by interviewing respondents who represented the population. Descriptive analysis is used to describe the socio-economic conditions, understanding and perceptions of the community regarding ecosystems and mangrove restoration. Generally, respondents understand the role of mangrove forests and agree that mangrove restoration must be done together. Amount of 53 - 83% of respondents agreed and understood that mangrove restoration is important for life and has an impact on income, social and cultural life. The results showed that 60 - 90% of respondents around the restoration area need a rehabilitation program and are willing to be involved in a mangrove restoration program with the parties.
Nest Characteristics of the Introduced Orangutan at Jantho Orangutan Reintroduction Station, Aceh Besar Irmayuni; Onrizal; Suwarno
Journal of Sylva Indonesiana Vol. 6 No. 01 (2023): Journal of Sylva Indonesiana
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsi.v6i01.9702

Abstract

Sumatran orangutans (Pongo abelii) learned the process of building nests from their mothers and started building nests around the age of 0.5 years. Orangutan nests have the most intricate arrangement of other primate nests. Orangutans built the nest as a place to rest, play, and protect themselves from predators and insect bites such as mosquitoes. Orangutan nests have different locations tailored to the needs and context of the nest trees. The shape of the nest and the position of the nest usually have differences due to differences in sex, age level, and body weight. The research had conducted at the Jantho Orangutan Reintroduction (JOR) Station, Aceh Besar Regency, Aceh Province. It had carried out from January to August 2021. The research method used is purposive sampling. The selected transects are existing (permanent) with FB, RI, and IS coding, which is part of mammalian transects scattered in the Jantho Pine Forest Nature Reserve. Observations were carried out as many as two repetitions in different months. The results showed several classes and nest positions found at the JOR Station. The nest classes found were 1, 2, and 3, while the others were not found. Nests in position 2 were the most founded at the study site, and position 5 was not found. It indicates no orangutan at the study site liked to play on the ground. This study gets four nest shapes, namely single round, flat oval, tiered, and irregularly widened
Penyuluhan dan Pendampingan Penanaman Bibit Kopi Arabika Bersertifikat di Desa Sitolu Bahal Kecamatan Lintong Nihuta Kabupaten Humbang Hasundutan Rahmanta, Rahmanta; Onrizal, Onrizal; M. Jufri, M. Jufri
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 1 (2025)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jb.v6i1.11228

Abstract

Usahatani kopi arabika di Desa Sitolu Bahal Kecamatan Lintong Nihuta Kabupaten Humbang Hasundutan pada umumnya memanfaatkan lahan sendiri. Kondisi ini merupakan peluang sekaligus tantangan di masa depan dalam meningkatkan pemanfaatan lahan dan peningkatan kapasitas produksi kopi arabika bersertifikat. Produksi kopi arabika di Desa Sitolu Bahal Kecamatan Lintong Nihuta belum mencapai maksimal. Disisi lain, keberadaan kelompok tani dalam usaha tani kopi arabika sangat bermanfaat bagi petani karena membantu dalam keberlangsungan usaha dan adanya transfer keterampilan teknis dalam berusahatani kopi arabika. Namun, peran kelompok tani sebagai wadah belajar dan berusaha belum optimal. Berdasarkan permasalahan tersebut, tim pengabdian kepada masyarakat mengusulkan penyuluhan dan pendampingan penanaman bibit kopi arabika bersertifikat di Desa Sitolu Bahal Kecamatan Lintong Nihuta Kabupaten Humbang Hasundutan. Cara yang digunakan dengan melakukan penyuluhan, penyaluran benih kopi arabika dan pendampingan penanaman kopi arabika bersertifikat. Hasil kegiatan penyuluhan dan pendampingan adalah bertambahnya pengetahuan masyarakat tani tentang tatacara penanaman kopi arabika dan hibah bibit kopi arabika bersertifikat yang siap tanam oleh masyarakat tani. Simpulan kegiatan penyuluhan dan pendampingan penanaman bibit kopi arabika di Desa Sitolu Bahal berlangsung baik dan sukses. dan diharapkan adanya penanaman kopi arabika bersertifikat akan dapat meningkatkan pendapatan masyarakat tani ke depannya
PEMBERDAYAAN EKONOMI MASYARAKAT PESISIR YANG BERKELANJUTAN MELALUI PENANAMAN MANGROVE SECARA TEMATIK Audah, Kholis Abdurachim; Marpaung, Abdullah Muzi; Onrizal, Onrizal; Anisa, Amalda Siti; Permana, Tabligh; Bhatara, Aditya
Prosiding Konferensi Nasional Pengabdian Kepada Masyarakat dan Corporate Social Responsibility (PKM-CSR) Vol 7 (2024): PKMCSR2024: Kolaborasi Hexahelix dalam Optimalisasi Potensi Pariwisata di Indonesia: A
Publisher : Asosiasi Sinergi Pengabdi dan Pemberdaya Indonesia (ASPPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37695/pkmcsr.v7i0.2398

Abstract

Indonesia merupakan negara yang memiliki populasi tanaman mangrove terbesar di dunia yaitu sekitar 23%. Mangrove dikenal secara luas manfaatnya untuk perlindungan lingkungan dan konservasi. Mangrove juga secara tradisional telah dimanfaatkan oleh penduduk pesisir di Indonesia dan belahan bumi lainnya untuk berbagai kebutuhan hidup seperti sebagai bahan pangan atau obat-obatan. Hasil-hasil penelitian juga menunjukkan bahwa mangrove mengandung berbagai jenis senyawa bioaktif. Selama ini kegiatan penanaman mangrove telah banyak dilakukan, namun kegiatan tersebut perlu diarahkan dan dikoordinasikan lebih baik agar dapat memberikan manfaat dan dampak yang lebih luas. Semua elemen masyarakat perlu bekerja sama untuk mendorong diversifikasi pemanfaatan mangrove terutama untuk pemberdayaan ekonomi masyarakat sekitar. Salah satu program yang dapat dilakukan adalah melalui penanaman mangrove secara tematik. Maka itu, tujuan dari kegiatan pengabdian kepada masyarakat ini adalah untuk mengedukasi dan menginisiasi program penanaman mangrove secara tematik. Kegiatan ini dipusatkan di wilayah Pesisir Utara Kabupaten Tangerang. Metode kegiatan ini mencakup diskusi dengan masyarakat dan pemerintah Kabupaten Tangerang, seminar dan pencarian lokasi penanaman dan bibit tanaman. Hasil kegiatan ini berupa pemilihan jenis tanaman mangrove dan lokasi percontohan penanaman tematik mangrove yaitu dipusatkan di Kawasan Ekowisata Ketapang yang terletak di Kecamatan Mauk, Kabupaten Tangerang, Propinsi Banten. Kegiatan ini bekerja sama dengan Pemerintah Kabupaten Tangerang.
Vegetation Composition of the Succession Forest of Sumatran Orangutan (Pongo abelii) Habitat in Tropical Lowland Forest, Gunung Leuser National Park Ardi, Rio; Onrizal; Thoha, Achmad Siddik; Mansor, Mashhor
Journal of Sylva Indonesiana Vol. 8 No. 01 (2025): Journal of Sylva Indonesiana
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsi.v8i01.12891

Abstract

The Gunung Leuser National Park (GLNP) area, among others, consist of tropical lowland-forest ecosystems that becomes the habitat of Sumatran orangutans (Pongo abelii). The GLNP is located at Aceh dan North Sumatra Provinces and lies on 830,268,95 hectares of land. To date, the area is not free from the pressure of forest degradation, such as encroachment and land conversion to plantations. This is a perturbing condition, especially concerning the biodiversity in its lowland-forest ecosystem. The vegetation composition that renders the succession of Sumatran orangutans in the GLNP lowland-forest was obtained by conducting vegetation analysis on the restoration sites in the forest. The analysis method adopted on this research was the grid-path method. Two transect lines, 1,000 metres each, were made for this purpose. Each line consisted of 10 plots with a distance of 100 metres between plots. The measurements were made on the growth rate of seedling, sapling, pole, and tree. The data were then processed to determine the Important Value Index (IVI), Diversity Index, Richness Index of vegetation, and Dominance Index of the research area. The results showed that the vegetation composition that rendered the succession of lowland-forests of GLNP consisted of 58 species and 26 families. Ficus fistulosa had the highest IVI at the growth-stages of seedling and sapling. And Macaranga tanarius had the highest IVI at the growth-stages of pole and tree. The species Diversity Index (Shannon-Wiener index) of the vegetation on the restoration site in lowland forests of GLNP showed moderate values at the growth-stage of seedling and pole, and high values at the growth-stages of sapling and tree. The Richness Index of vegetation showed moderate values at the growth-stages of seedling and pole. As for at the stages of sapling and tree, it showed high values. The Dominance Index of the restoration site in lowland forests of GLNP showed high values at all growth-stages.
Co-Authors Achmad Delianur Nasution Achmad Siddik Thoha Agus Purwoko Ahmad Baiquni Rangkuti Alfan Gunawan Ahmad Ananingtyas S Darmarini Anisa, Amalda Siti Ardi, Rio Arida Susilowati Iswanto Arlina Nurbaity Lubis Audah, Kholis Abdurachim Bambang Hero Saharjo Basuki Sumawinata Batubara Ridwanti Bhatara, Aditya Cecep Kusmana Desrita Desrita Diana Sofia Hanafiah Fernades SP Simarmata Hesti Wahyuningsih Indra Aulia Irmayuni Ismail Ismail Jatna Supriatna Jelly Permana Purba M. Jufri, M. Jufri Mansor, Mashhor Marpaung, Abdullah Muzi Mashhor Mansor Muhdi Nurdin Sulistiyono Perbatakusuma, Erwin A. Perbatakusuma, Erwin A. Permana, Tabligh Pindi Patana Prihatin Lumbanraja Rahmanta Rahmanta, Rahmanta Rudi Hartono Samsuri, Samsuri Sudjito, Herwasono Sudjito, Herwasono Suwarno Tika Yuana Sari Tsuyoshi Kato Wijayanto, Iwan H. Wijayanto, Iwan H. Yundari, Yundari Zulham Afandi Harahap