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All Journal Bioscience Jurnal Biologi Tropis BUANA SAINS Pelita Eksakta Jurnal Serambi Biologi JRTI (Jurnal Riset Tindakan Indonesia)
Reki Kardiman
Universitas Negeri Padang
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Immunology & microbiology Law, Crime, Criminology & Criminal Justice Mathematics Physics Social Sciences Other

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Structure of Tree Community on Agroforestry Parak in Peri-Urban Areas District of Lubuk Alung Padang Pariaman Reki Kardiman; Irma Leilani
Bioscience Vol 7, No 1 (2023): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/0202371122621-0-00

Abstract

Agroforestry or tree crops in West Sumatra is called parak, it mostly related to rural and farmers but at some developing areas the parak is still existed with a high potential changes in structure and floristic composition due to commercial orientation. To explore the possible changes of tree community in such developing areas, 11 of 20x20 meter plots were established across parak areas in peri-urban site in Lubuk Alung district, Padang Pariaman Regency, West Sumatra Indonesia, aimed to specifically investigate tree density, stand basal area, spesies distribution and other ecological atributes of the species. We found 24 tree species from 306 trees within 0.44 ha or about 695 tree per ha. Durio zibethinus was the biggest trees, found as a top canopy but few in number and spreaded quite widely across the areas, followed by some other species such as Cocos spp., Areca catecu, Garcinia spp., while small trees, high density but only spreaded at some places was represented by Theobroma cacao. Many species and the structure were typically agroforest that vary in canopy level and economic functions except some species which may be additionally planted to suit the needs of peri-urban community.
New Data of Morphological Variation in Microhyla gadjahmadai Atmaja et al., 2018 (Anura: Microhylidae) from West Sumatra Shinta Triana Putri; Rijal Satria; Reki Kardiman; Fitra Arya Dwi Nugraha
Jurnal Biologi Tropis Vol. 23 No. 3 (2023): July - September
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.v23i3.4962

Abstract

Microhyla gadjahmadai was first described by Atmaja et al. in 2018. For the newly described species category, there is not much information explaining this species and there has been no further research after this species was described, especially in West Sumatra. This study aims to provide information on variations in the morphological characteristics of M. gadjahmadai in West Sumatra, through morphological and morphometric analysis of 8 samples (1 adult male and 7 adult females) found in Puncak Anai (Dempo Anailand), Kanagarian Guguak, District 2x11 Timber Planting, Padang Pariaman Regency, West Sumatra. This study used the Visual Encounter Survey (VES) method. The result of the present study shows that no significant morphological differences between the holotype and paratype of Microhyla gadjahmadai and other specimens from West Sumatera. However, the present study reported that the morphological variations of this species.
Inventory of Mammal Species Using Camera Trap in Pondok Parian Nagari Forest, Lunang, Pesisir Selatan Regency, West Sumatra Tassya Putri; Reki Kardiman; Fitra Nugraha
Jurnal Serambi Biologi Vol. 8 No. 2 (2023): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

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Abstract

Mammal inventory is a survey activity to find mammal species that exist in a certain area at a certain time and point. The existence of mammals in a forest area helps restore forest conditions through their role as natural predators and seeds dispersing. Nagari Forest is one of the efforts to maintain the existence of forests and biodiversity that have ecological, economic, socials and cultural benefits. The aim of this study was to determine the types of mammals found in Pondok Parian Nagari Forest, Lunang based on the results of camera trap recordings. This research is descriptive study, conducted from July 2022 to January 2023. Located in Pondok Parian Nagari Forest, Lunang, West Sumatra. Data collection using the camera trap method. The data obtained was analyzed and then arranged into the table consisting of orders, famili and species. The camera trap succeeded in documenting 19 species of mammals belonging to 14 families and 6 orders. Those identified species were Tapirus indicus, Capricornis sumatraensis, Muntiacus muntjac, Tragulus napu, Cuon alpinus, Neofelis diardi, Prionailurus bengalensis, Pardofelis marmorata, Helarctos malayanus, Martes flavigula, Hemigalus derbyanus, Paguma larvata, Viverra tangalunga, Arctictis binturong, Hystrix brachyura, Macaca namestrina, Presbytis melalophos, Macaca fascicularis, Echinosorex gymnure.
FENOLOGI DAN KETERSEDIAAN REGENERASI POHON NYAMPLUNG (Calophyllum inophyllum L.) DI PESISIR PANTAI KABUPATEN PADANG PARIAMAN Fatri Juni Ardisa; Reki Kardiman; Moralita Chatri; Filza Yulina Ade
BUANA SAINS Vol 25, No 3 (2025)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v25i3.8137

Abstract

Nyamplung (Calophyllum inophyllum L.) is a key coastal species with both ecologyl and economic importance. The tree, is highly recommended for coastal zone restoration, but availability of the seeds and seedlings is less known.This study aimed to investigate flowering/fruiting phenology as well as natural regeneration availability across different in coastal zone of  Padang Pariaman Regency. Weekly phenological observations and regeneration stock measurement were conducted from September to December 2025i, with 34 observed trees in the sites that ranged from ;ow to high land use level. Results showed that most trees were found flowering in September, but it was declined following the increasing of fruiting event at mid to end of October and number of the fruiting trees were declined until end of December. These flowering and fruiting phenology among the landuse types showed a similar pattern with only little variation. In general 0.12 seedlings/m², while tourism areas showed the lowest 0.03 seedlings/m² in the highest disturbed. And is was negatively correlated with distance fron the mother tree(p0.05). This study a range of flowering and fruiting phenology in Padang Pariaman Coastal areas with small variation of the phenology between landuse types, as well as variation in regeneration stock of C. inophyllum across the areas.
DISTRIBUSI SPASIAL, KARAKTERISTIK HABITAT DAN KARAKTERISTIK POPULASI POHON NYAMPLUNG (Calophyllum inophyllum L.) DI PESISIR PANTAI KABUPATEN PADANG PARIAMAN Silvia Ayunda; Reki Kardiman; Irma Leilani Eka Putri; Filza Yulina Ade
BUANA SAINS Vol 25, No 3 (2025)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v25i3.8138

Abstract

Nyamplung (Calophyllum inophyllum L.) is a coastal plant species that plays an important ecological role in protecting coastal areas from abrasion, reduce the impact of sea winds, and maintain the stability of coastal environments, while the tree is economically potential as vegetable oil sources for biodiesel. In Padang Pariaman Regency, Nyamplung is also knows as Pinago, the trees are found growing in the coastal areas, both naturally and through planting, but it is still remain unknown the current spatial distribution and the local habitat conditions. This study aimed to investigate the spatial distribution and habitat characteristics of Nyamplung in the coastal area of Padang Pariaman Regency. Field observations were conducted for recording coordinates location of each Nyamplung tree, measuring the diameter at breast height (DBH) and canopy cover, and determining habitat characteristics. The spatial distribution  was analyzed using ArcGIS, while the habitat conditions and the population structure were analyzed in terms of linear regression. The results showed that Nyamplung was distributed partly or clustered at three specific site in  the coastline. Most of the site was sandy habitat with very thin layer of top soil and the trees were moslty exposed to full sunlight. The trees were varied in size, ranged from 2-62 cm dbh, with crown cover ranged from 5-600 m2, and these two variables were positively correlated. This study showed a limited number of Nyamplung trees in the coastal of Padang Pariaman, with less damage of community to canopy. Planting of Nyamplung in this area for a wider positive impact.
Initiating the action of wildlife conservation through local custom and regulation in Singgalang village Tanah Datar West Sumatra Azwir Anhar; Reki Kardiman
Pelita Eksakta Vol 9 No 1 (2026): Pelita Eksakta, Vol. 9, No. 1
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol9-iss1/320

Abstract

There are national regulations on conservation of wildlife in Indonesia, but the implementation has not been optimum due to lack of monitoring by the government. This program was trying to initiate local participative on conservation of wildlife, specifically initiating a village constructing their own regulation or local custom for sustainable natural resources management. The program was conducted in Singgalang village Tanah Datar Regency West Sumatra, with multi local stakeholders belong to customary holders, tourism leading group, the official village staffs, women association and schools across the village were involved. The program was officially openned by vice Bupati of Tanah Datar Regency, then it was followed by seminar with Yayasan SINTAS Indonesia for biodiversity richness and the problems, and completed by PAGARI for local custom implementation. The participants were excited with the seminar and took various necessary messages. This provided great insight to let the local stakeholders create their local custom
The effect of ESD-based problem based learning on grade 10 students’ critical thinking skills and sustainability awareness Anggi Yusriana; Yuni Ahda; Heffi Alberida; Reki Kardiman
JRTI (Jurnal Riset Tindakan Indonesia) Vol. 11 No. 1 (2026): JRTI (Jurnal Riset Tindakan Indonesia)
Publisher : IICET (Indonesian Institute for Counseling, Education and Therapy)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29210/30036939000

Abstract

21st-century learning requires students to develop critical thinking skills and sustainability awareness to address global challenges. Initial observations indicated that students’ critical thinking skills ranged from less critical to moderately critical, while sustainability awareness was moderate. This study investigated the effect of ESD-based Problem-Based Learning (PBL) on these two outcomes among Grade 10 students at SMA Pertiwi 1 Padang. A quasi-experimental posttest-only control group design was employed, involving an experimental group receiving ESD-based PBL and a control group receiving the regular learning approach. Data were collected using a critical thinking essay test and a sustainability awareness questionnaire and analyzed using MANOVA. The results showed a significant multivariate effect (Wilks’ Λ = 0.285, F(2,62) = 77.707, p < 0.001, η²p = 0.715). Univariate analysis showed significant effects on critical thinking skills (F = 152.873, p < 0.001, η²p = 0.708) and sustainability awareness (F = 10.633, p = 0.002, η²p = 0.144). The experimental group obtained higher mean scores for critical thinking (78 vs. 52) and sustainability awareness (79 vs. 72). These findings indicate that ESD-based PBL was associated with higher critical thinking skills and sustainability awareness, although the findings are limited to immediate post-intervention outcomes.
Development of digital storytelling video media to improve students' critical thinking and communication skills on environmental change material Natasya N; Abdul Razak; Muhyiatul Fadillah; Reki Kardiman
JRTI (Jurnal Riset Tindakan Indonesia) Vol. 11 No. 1 (2026): JRTI (Jurnal Riset Tindakan Indonesia)
Publisher : IICET (Indonesian Institute for Counseling, Education and Therapy)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29210/30036942000

Abstract

This research is a research and development study of learning media based on Digital Storytelling (DS) on environmental change material to improve students' critical thinking and communication skills. Using the 4-D model (Define, Design, Develop, Disseminate) combined with a quasi-experimental design (quasi-experimental pretest-posttest control group design) with an intervention duration of 3 meetings, this study applied a purposive sampling technique involving 48 eleventh-grade students divided into an experimental group (n=24) and a control group (n=24). The results showed that the media was highly valid (97.31%) and highly practical based on teacher perception (92.11%) and student perception (92.71%). Data collection for critical thinking skills used a standardized test (α = 0.90). The effectiveness test using an independent samples t-test showed a statistically significant increase in critical thinking skills, where the experimental class achieved an average N-Gain score of 83.98% (high category) compared to the control class which only obtained 48.69% (p = 0.000). In addition, students' communication skills in the experimental group increased significantly based on the Mann-Whitney U test (p = 0.000) with a large effect size (r = 0.862). In conclusion, the Digital Storytelling video media proved to be valid, practical, and highly effective in improving students' critical thinking and communication skills on environmental change material.
Co-Authors Abdul Razak Anggi Yusriana Azwir Anhar Fatri Juni Ardisa Filza Yulina Ade Fitra Arya Dwi Nugraha Fitra Nugraha Heffi Alberida Irma Leilani Irma Leilani Eka Putri Moralita Chatri Muhyiatul Fadillah Natasya N Rijal Satria Shinta Triana Putri Silvia Ayunda Tassya Putri Yuni Ahda