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All Journal Jurnal Sylva Lestari Forest and Nature
Duryat
Department of Forestry, Faculty of Agriculture, University of Lampung
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Environmental Science Materials Science & Nanotechnology

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Biomass Productivity of Invasive Mantangan (Merremia peltata) under Various Canopy Covers Duryat; Santori; Trio Santoso; Melya Riniarti; Rikha Aryanie Surya
Jurnal Sylva Lestari Vol. 11 No. 1 (2023): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v11i1.637

Abstract

Mantangan (Merremia peltata) is the most important invasive species in Bukit Barisan Selatan National Park (BBSNP) due to its fast-growing and spreading that potentially damage and threat biodiversity conservation. The objectives of this study were to determine the biomass stock and productivity of mantangan and the nutrient content of mantangan biomass grown in various classes of canopy cover. Stratified sampling was employed as a sampling method on three classes of canopy cover, i.e., sparse (light intensity > 70%), medium (light intensity 40 -70%), and dense (light intensity < 40%). A destructive method was used to collect biomass samples. The biomass harvesting was conducted twice. The first was conducted to determine biomass storage and nutrient content, and the second was conducted a month later to measure biomass productivity. The macronutrient content (N, P, K, and C-Organic) of mantangan was analyzed at the Soil Science Laboratory, Faculty of Agriculture, University of Lampung. The results showed that the biomass stock and productivity differed in each canopy cover class. The highest biomass stock was found in sparse canopy cover (192 kg/ha), followed by medium (188 kg/ha) and dense (179 kg/ha). Biomass productivity was highest in sparse canopy cover (93 kg/ha/month), followed by medium (79 kg/ha/month) and dense (83 kg/ha/month), respectively. Surprisingly, the nutrient content and nutrient productivity of mantangan grown on medium canopy cover were higher than that of dense and sparse. Keywords: Biomass, Bukit Barisan Selatan National Park, invasive alien species, mantangan
Harnessing the Blue Economy: Ethnobotanical Insights into Mangrove-Derived Functional Foods for Climate-Resilient Futures Syari Mela Simanjuntak; Duryat; Melya Riniarti
Forest and Nature Vol. 1 No. 1 (2025): January
Publisher : Green Insight Solutions

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63357/fornature.v1i1.6

Abstract

Climate change threatens food security at the local, regional, and global levels. Optimizing the potential of the blue ecosystem, especially mangrove forest products, can contribute to overcoming the food crisis. This study aims to document the ethnobotanical practices related to the utilization of mangroves as a food source in the South Lampung Regency.  This study employed the snowball sampling method, utilizing open-ended interviews with respondents. The collected data, including species types, utilized plant parts, processed products, and associated properties, were analyzed using descriptive-analytical methods to identify patterns, relationships, and factors influencing the practice of mangrove-based food utilization. The results reveal that the people of South Lampung Regency utilize four mangrove species as ethnobotanical food sources. These include the fruit (excluding the root) of Rhizophora mucronata, which is processed into coffee; the young leaves of Avicennia marina, consumed as fresh vegetables; its sap, which is processed into health beverages; and its fruit, which is used to produce flour for cake-making. Additionally, Acanthus ilicifolius is processed into tea and rempeyek, a traditional cracker made from leaf fragments. Beyond their nutritional value, mangroves possess bioactive properties, including antifertility, antioxidant, analgesic, anticholesterol, antihypertensive, antitussive, and anti-inflammatory effects, highlighting their potential for development into functional foods. Such diversification could address various social and economic challenges in South Lampung Regency. However, limitations in human resource capacity hinder the optimization of mangrove utilization, resulting in a lack of diversity and innovation in the selection of species, utilized plant parts, processed products, and processing techniques.
Mangrove Cover and Shoreline Changes Detection using Multi-Temporal Landsat Imagery and Digital Shoreline Analysis System (DSAS) in Labuhanbatu Regency, Indonesia Samsuri; Anita Zaitunah; Nailatul Amaliah; Yohanes Budi Sulistioadi; Duryat
Jurnal Sylva Lestari Vol. 14 No. 1 (2026): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i1.1259

Abstract

Understanding the dynamics of the relationship between shoreline change and mangrove forest cover change is important for a foundation in mangrove and coastal forest management. The study aimed to analyze multitemporal changes in mangrove cover and shoreline in coastal areas and to investigate the correlation between these changes from 2011 to 2024. The research used remote sensing data to derive mangrove cover changes and detect shoreline changes from Landsat images acquired in 2011, 2015, 2019, and 2024. Land cover changes were examined using the operational land imager sensor, bands 3 and 6 of Landsat 8 images and bands 2 and 5 of Landsat 5 images, and shoreline changes were measured using the digital shoreline analyses system (DSAS). The result showed a reduction of 580.07 ha (26.48%) in mangrove cover area over eight years (2011-2019), followed by an increase of about 1,931.59 ha (54.54%) in 2024. Low abrasion (0.01-108.41 m) and low accretion (0-106.78 m) per four-year interval dominate in shoreline change. However, the Pearson correlation showed a moderate but non-significant association between changes in mangrove cover and shoreline changes (r = 0.307, p = 0.266). These results demonstrate that the correlation between mangrove cover change and shoreline change is non-linear, suggesting that shoreline change is affected not only by mangrove change but also by various other factors, including sedimentation events. It indicates that additional factors, including geomorphological dynamics, significantly influence mangrove forest dynamics. Keywords: abrasion, change detection, land cover, mangrove, shoreline
Co-Authors Anita Zaitunah Melya Riniarti Nailatul Amaliah Rikha Aryanie Surya Samsuri Santori Syari Mela Simanjuntak Trio Santoso Yohanes Budi Sulistioadi