bluuebunny/crossref_metadata_2025_split huggingface dataset:
Species composition and structure of mangrove forest exposed to plastic waste in Angke Kapuk mangrove protected forest, Jakarta
Authors: Rumondang A L , Kusmana C , Budi S W 
Published: January 2022

Abstract
Angke Kapuk Mangrove Protected Forest (AKMPF) is one of the protected mangrove forests in the coastal area of DKI Jakarta exposed to plastic marine debris. This study aims to determine species composition and forest structures of mangrove forest exposed to plastic waste which is important as basic information for sustainable mangrove forest management in Angke Kapuk mangrove protected forest. Vegetation data were collected using the sampling unit of transect for tree and line plot for forest regeneration inventories. Those data were analysed for the density, frequency, dominance, species diversity, and species distribution pattern. The results show that the area of AKMPF exposed to plastic waste consists of 9 mangrove species, including 6 species of true mangrove, 2 species associated mangrove, and 1 species of palm, with the dominant species are Avicennia marina for tree with its regenerations and Acrostichum aureum for groundcover, which are species that live in disturbed mangrove areas. Mangrove trees in this area have a height class between 4 – 25 meters, while stem diameter class were between 10.00 – 69.75 cm. The most distribution pattern of species in this area generally was regular, except sapling of Avicennia marina, seedling of Rhizophora mucronata, and Acrostichum aureum distributed randomly.
Climatic Suitability for Robusta Coffee in West Lampung Under Climate Change
Authors: Sarvina Y , June T , Sutjahjo S H , Nurmalina R , Surmaini E 
Published: January 2022

Abstract
West Lampung has long been recorded as one of the Indonesian major Robusta coffee producers. Coffee is an annual crop sensitive to climatic conditions. Therefore, climate change have been reported to affect yield and area suitable for coffee production. Assessing climate suitability coffee area in West Lampung is crucial for a sustainability of coffee production system. This study aims to identify changes in coffee crop suitability under climate change. Coffee production data from the local agriculture office and climate data from Wordclim were processed using Maximum Entropy (MaxEnt) and ArcGIS to project the impact of climate change on distribution change of coffee suitability. The Result of MaxEnt indicates an important shift in climatic suitability of coffee area in the future. Suitable grown areas decrease. This shift requires an adaptation strategy for sustainable coffee production system in West Lampung.
Species composition and Vegetation Structure of Mangrove Forest in Pulau Rambut Wildlife Reserve, Kepulauan Seribu, DKI Jakarta
Authors: Kusmana C , Azizah N A 
Published: January 2022

Abstract
Mangrove forest in Pulau Rambut Wildlife Reserve has high biodiversity, so research is needed on species composition and vegetation structure. This study aims to examine the species composition and structure of mangrove forest vegetation in the Pulau Rambut Wildlife Reserve. Vegetation analysis was carried out using the strip and line method with a sample plot area of 8000 m2 and a total of 8 lanes each with a size of 10 m x 100 m. The results showed the mangrove forest of Pulau Rambut Wildlife Reserve has 9 species from 5 families and dominated by the Rhizophoraceae family. The Rhizophora mucronata species dominates the growth rate of trees and seedlings, while Ceriops tagal species dominated the sapling growth rate. The value of diversity, richness, and dominance in the mangrove forest of Pulau Rambut Wildlife Reserve at various growth rates is low, but the value of species evenness is high. The proportions of the number of trees and regeneration form an inverted “J” curve. The canopy stratification in mangrove forest of Pulau Rambut Wildlife Reserve only reached stratum C (4-20 m). The mangrove forest needs a planting and enrichment of plant species to increase the species diversity level.
Study of biophysical land characteristics to support the sustainability of Gunung Batu Arboretum as a miniature botanical garden in Bogor City, Indonesia
Authors: Suratman  , Widiatmaka  , Pramudya B , Purwanto M Y J , Agus F , Syamsudin I 
Published: January 2022

Abstract
Gunung Batu Arboretum is part of the nature conservation area in Bogor City, West Java, Indonesia. It holds an essential role in supporting conservation effort activities through ex-situ of various trees species. Land biophysical research been carried out aimed at protecting the role of the Arboretum, which supports the growth of various plant collections of forest resources totaling 1,178 stems. The research was conducted in the field by making a soil profile and observing the characteristics of the environment and trees. The results showed that the location of the Arboretum was at the feet of stratovolcano, elongated ridges landform of Salak Mountain. The old volcanic rock covering this region form reddish-brown Latosol soil with deep solum, delicate texture, very friable and low aggregate stability, a very steep slope topography (slope >40%), supported by high rainfall, with an increased risk of erosion even it has landslide potential. The chemical character of the soil fertility is classified as acidic, low to moderate base saturation, low nutrient content, potentially the degradation of the soil fertility, especially the loss of topsoil, which is very supportive to the growth of the various types of trees collection in the Arboretum area.
A comparative study of ZnO nanogenerator based piezo in series and parallel as green energy harvester
Authors: Adinegoro P , Ali H , Saparullah  , Sunaryono  , Aripriharta  , Mufti N 
Published: January 2022

Abstract
This paper reports the performance of the flexible nanogenerator as a green energy harvester depends on connection variation. The ZnO nanogenerator was successfully fabricated on Al/PET. The ZnO Nanorods were synthesized using a hydrothermal method at 95°C. The ZnO Nanorods were characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transforms infrared spectroscopy (FTIR), and UV-Vis spectrophotometer. The performance of the nanogenerator was performed using Osiloscop and electrometer in series and parallel connection. Based on the XRD pattern, ZnO sample has a hexagonal (wurtzite) crystal structure in which the lattice parameters of a = b, and c = 3.258 Å, and 5.218 Å, respectively. The morphology of ZnO is a hexagonal form with diameters of 81,06 nm to 467.69 nm and rod length around 595 nm to 1331 nm. Based on the FTIR spectra, there are Zn-O bonds at 435-445 cm-1, 535 cm–1 and, 541 cm-1. Moreover, ZnO nanorods have an energy gap band of 3.2 eV. The performance of the ZnO nanogenerator in series form has the highest voltage with a value of 10.36 volts AC, and the voltage value in dual-source is more than ten times larger compared to a single source.
Trophic Status and Phytoplankton Community Structure of Four Small Lakes in Ciliwung Watershed, Indonesia
Authors: Sulastri  , Aisyah S , Dina R 
Published: January 2022

Abstract
Small lakes are critical freshwater resources to support the quality of human life. Small lakes in the watershed are becoming threatened ecosystems because of increasing land-use changes and anthropogenic activity. We determine the trophic status, phytoplankton community, and environmental factors in Lake Telaga Warna, Lake Cikaret, Lake Sunter, and Lake Cincin. The data was collected from primary and secondary data in 2000, 2007, 2008, 2016, and 2021. There are two groups of lakes based on water quality and trophic status. Lake Telaga Warna and Lake Cikaret, located at the upper and middle watershed, are eutrophic characterized by lower nutrient temperature, pH, conductivity, and Total Dissolved Solids (TDS). Lake Sunter and Lake Cincin, located at lower watersheds, are hypereutrophic characterized by higher nutrients, temperature, pH, conductivity, and TDS. Cyanobacteria dominance was recorded in Lake Telaga Warna and Lake Sunter, where Microcystis aeruginosa;
Cylindrospermosis raciborskii; and Planktotrhix agardhii are the dominant species. Hypereutrophic status in Lake Sunter was characterized by the bloom of Planktothrix agardhii with total abundance (1,038x103 individualL-1 x 103), chlorophyll-a (431 µgL-1), low diversity index and species richness index. Cyanobacteria dominance in Lake Telaga Warna was under phosphorous limitation, while Cyanobacteria bloom in Lake Sunter was under nitrogen limitation.
The Water Quality Characteristics and Quality Status of Bengkulu River and Nelas River, Bengkulu Province: Conditions for The Last Six Years
Authors: Khalik I , Sapei A , Hariyadi S , Anggraeni E 
Published: January 2022

Abstract
The existence of extractive activities around the river has a negative impact on the quality of river water. This study aims to provide an overview of water quality characteristics and water quality status of Bengkulu River and Nelas River in Bengkulu Province. The data used is river quality monitoring conducted by the Environment and Forestry Service of Bengkulu Province from 2014 to 2019. Measurements are carried out twice a year representing, the dry season (March to June) and the rainy season (September to December). The observation stations representing upstream, middle and downstream of rivers conditions. The parameters observed were physical, chemical, and biological parameters. The water quality status is determined using the Storet Index. The results show that both rivers have Storet Index >-31. It means that these river water are heavily polluted. Parameters that have exceeded the water quality standard are TSS, DO, BOD, COD, Fe, Mn, Cu, and total coliform. The river water quality parameters, especially heavy metals, may be caused by open land being washed and carried into the river body. The existence of population and animal activities as well as industrial waste outlets at upstream also affect the decline of river water quality.
Trophic Status of Waters in Poso Watershed, Central Sulawesi
Authors: Sulawesty F , Triyanto  , Haryani GS , Lukman  , Samir O , Ali F , Nafisyah E 
Published: January 2022

Abstract
Poso Watershed is a potential area for tropical eel fish resources, the disturbance of the ecosystem balance in the form of damage to the catchment area will affect the existence of eel fish. This study aimed to determine the trophic status of the Poso watershed. Observations were conducted in March 2021 in six zones of the basin, namely Kodina River (1 site), Lake Poso (2 sites), Poso outlets (3 sites), Poso River (2 sites), and Poso river estuaries (4 sites). The observed parameters were water quality (physics and chemistry) and biology (phytoplankton composition and abundance). In general, the conditions of the Poso Watershed are still good, temperatures range from 24.26 ° C-29.24 ° C, pH shows that these waters are alkaline (9.15-10.21), and dissolved oxygen (DO) indicates dissolved oxygen quite high (7,13-7,93 mg/L). The values of chlorophyll-a, total nitrogen (TN), and total phosphorus (TP) showed low. The value of turbidity and total suspended solids is higher at the mouth of the Poso River (MP1-MP4) compared to other stations. The abundance of phytoplankton is low (9-848 individuals/liter), and the species with high abundance is Staurastrum sp. (Chlorophyceae). Hence, this study shows the Poso Watershed, including oligotrophic to eutrophic waters.
Health Assessment Of Conservation Forest-Based On Biodiversity Indicator Tree Types (Case Study at Elephant Respont Unit Margahayu Way Kambas National Park)
Authors: Sanjaya F A , Safe’i R , Winarno G D , Setiawan A 
Published: January 2022

Abstract
Conservation forest health assessment based on indicators of tree diversity is needed because it is sensitive to changes, indicators of ecological systems, spatial, temporal, and trophic heterogeneity. This study aims to determine the variety of tree species in Margahayu Elephant Response Unit Way Kambas National Park as an indicator of forest health assessment. The research was conducted using the Forest Health Monitoring method. The area of Margahayu Elephant Response Unit in Way Kambas National Park is 35.2 ha. One cluster plot has an area of 0.4 ha, so the number of research clusters created in this study is 5 clusters with a total area of 2 ha of observational collections. The results showed that the final value of forest health status with indicators of biodiversity (tree species diversity) in Margahayu Elephant Response Unit Way Kambas National Park was in the excellent category of 20% in cluster plot 2, while 60% in cluster plots (3, 4, and 5), and 20% poor in cluster plot 1, thus indicating that the forest in the Margahayu Elephant Response Unit Way Kambas National Park is in a reasonably healthy (stable) condition with a moderate category.
Nutrition Value and Growth Ability of Aquatic Weed Wolffia
globosa as Alternative Feed Sources for Aquaculture System
Authors: Said D S , Chrismadha T , Mayasari N , Febrianti D , Suri A R M 
Published: January 2022

Abstract
One of the problems of aquaculture is the high cost of feed. Therefore, how to minimize the feed cost is of the main goals. It is necessary to find out natural sources that can be used as alternative feed. Wolffia globosa is an aquatic weed that is presumed to be used as an alternative feed source. Study the nutritional content of the Wolffia was conducted in June 2019, while the growth ability was conducted both outdoors and indoors in July 2019 at Research Center for Limnology Laboratory, LIPI. The W. globosa (percentage in dry weight) contained protein: 45.54%, fat: 5.33%, crude fiber: 9.98%, ash: 20.43%, and Nitrogen Free Extract:19.21%. It also contains 15 types of amino acids as much as 1.51 %w/w. At the outdoor system culture, the Wolffia has daily growth rate/GR (g/day) was 64.62−120.6, specific growth rate/SGR (%/day) was 14.622-15.333, and the daily productivity/P (g/m2/day) was 97.757−176.659. While at the indoor system culture the value of GR (g/day), SGR (%/day), and P (g/m2/day) were 0.675−1.50; 9.889−12.643; and 25.883−64.564 respectively. It is indicated that this Wolffia is very potential to be an alternative natural feed source for aquaculture or another purpose and needs further research.
The Prospect of Geotourism in the Cycloop Mountains Conservation Area Papua
Authors: Setiadji P , Sulistyantara B , Pramudya B , Suwardi  
Published: January 2022

Abstract
The Cycloop mountains in Papua are a nature reserve conservation area that has diverse geology, biology and culture. This paper discusses the prospects of geotourism in Cycloop mountains based on a method of analyzing the community acceptability and tourists preferences, likewise the geosite attraction and geotourism sustainability. The results of analysis indicates that a) village communities in surrounding conservation area accept and wish to get involved in natural activities; b) local tourists are very dominant and motivated on outdoor recreation in groups; c) identified geosites has classified as from Quite Interesting to Interesting based on the index of attractiveness; and d) geotourism activity in the mountains Cycloop is categorized Quite Sustainable reviewed from the environment, society, economy and governance dimension. The exploration and the geological conservation to be the reliable activities in organizing the geotourism. Geotourism is likely to be applied to the conservation area as a form of implementation of the sustainable tourism concept.
Environmental Footprint Analysis Tools of Electrokinetic Remediation (EKR): A Bibliometric View of The Literature
Authors: Paramitadevi Y V , Ratnawati B , Effendi A J , Hidayat S , Budihardjo M A , Ramadan B S 
Published: January 2022

Abstract
Electrokinetic remediation (EKR) technology has been applied in both lab and pilot scales to actual size since 1993. Recently, sustainable measures for EKR have been relatively considered a form of minimizing resource use during land restoration. This study aims to identify the environmental footprint assessment tools that arise during the EKR process according to the scale of the application. 284 scientific literature indexed by Scopus and the Web of Science during 2011-2021 was analyzed using the Systematic Literature Review (SLR) method, and the results were visualized using the VOSviewer application. The investigated parameters included the amount of scientific literature, year of publication, topics of scientific literature, authors of literature and their country of origin, names of reputable journals, and a number of citations. Research results from 43 scientific literature studies show that different environmental footprint analyses in EKR have been applied in various parts of the world. Most of environmental footprint assessment tools used by researchers include life cycle assessment (LCA) and green and sustainable remediation (GSR) tools. A recommendation is given to the GSR tools developed by the US EPA because known to have the simplest analytical method compared to other methods.
Heavy metals (Pb and Cd) contents in the seawater and sediment in Panjang and Pamujaan Besar Islands, Banten Bay, Indonesia
Authors: Juniardi E , Sulistiono  , Hariyadi S 
Published: January 2022

Abstract
The industrial activities in the coastal area of Banten Bay harmed water quality and tourism aesthetics. This study aims to determine the accumulation of heavy metals Pb and Cd in the water and sediment, which was conducted for 3 months from May until July in 2019 in Pulau Panjang and Pamujaan Besar. Data were collected by using the purposive sampling method. The water samples were studied using Van Dorn Water Sampler, while sediment samples were undertaken using Peterson Grab. The concentration of Pb and Cd in water and sediment were analyzed at the Environmental Laboratory of the Department of Aquaculture. Those Concentrations in waters and sediments were the highest in June than in other months. In general, the water quality was still classified as normal because it was under the quality standards of the Decree of Ministry of Environment No. 51 of 2004. Heavy metal in Banten Bay fluctuated while Pb exceeded the quality standard in June and decreased in May and July. While Cd metal in May and June exceeded the quality standard and then declined in July. Those concentrations were still below the standard limits of the Canadian Council of Ministers of the Environment 2001.
The Effect of Demographic Factors on Waste Generation and Heavy Metal in Illegal Landfill at Malaka Regency, East Nusa Tenggara Province
Authors: Rame Leonarda Sofiani , Widiatmaka  , Hartono Arief , Firmansyah Irman 
Published: January 2022

Abstract
The population growth has led to a significant increase in the amount of waste every year. Meanwhile, several demographic factors influencing waste generation in Malaka Regency include an absence of a final landfill. This has caused the illegal dumping of waste which leads to various environmental problems. Therefore, this study aims to (I) analyze the effect of demographic factors on waste generation (II) determine the level of heavy metals and the chemical properties of the soil in the illegal landfill. In this study, the demographic factor sampling was conducted in all districts using a questionnaire to obtain each household sample and waste was weighed directly with the Stratified Random Sampling method. Also, soil samples at the landfill site were obtained through field observation and composite sampling. The results showed that age, gender of each family head, income, occupation, latest education, and the number of family members had a significant effect on waste generation in Malaka Regency. Based on the results, the content of Pb, Cd, and Hg in the soil at different waste disposal sites in Malaka Regency had passed the standard threshold value in soil, which showed that the land had been polluted by heavy metals.
Current Source and Distribution Pattern of Plastic Waste Leakage in the Estuary of Jakarta Bay
Authors: Ardiansyah  , Damar Ario , Hariyadi Sigid , Machfud  
Published: January 2022

Abstract
The accumulation of plastics in marine environment has increased the global risk of water pollution. Its uncontrolled production and existing management capacity have brought a burden on current plastic waste management, especially in Jakarta Bay. It has a negative impact on land, ecosystems, and especially the food chain and marine organisms. Their improper management has reduced the quality of environment, human health, and influenced economic sectors. Economic activities which involve coastal areas have consistently become a major source of plastic waste leakage either directly or indirectly. This study aims to analyze current source and its distribution patterns of plastic waste leakage in estuaries of Jakarta Bay using in-depth interviews and field observations. The results show the estuaries at the eastern part of Jakarta Bay is the highest potential for plastic waste leakage, followed by the western part, and the middle part is the least contributing plastic waste of leakage. The various sources of leakage in the estuaries are identified, including the behavior of the community that is vulnerable to exacerbates the existence of leakage. Handling capacities are limited including facilities, and the intensity of collection in the wide coverage of the operating area made the challenges to the responsible authorities.
Riverine Plastic Monitoring during the Rainy Season in the Citarum Estuary of Muara Gembong
Authors: Husrin S , Hidayat H , Rahmadya A , Aisyah S , Hurley R , Braaten H F V , Olsen M 
Published: January 2022

Abstract
The restoration effort to clean up the river, known as “Citarum Harum” requires monitoring to estimate both the composition and the volumes of plastic pollution. The objective of the monitoring is to obtain a scientific baseline of marine plastics from Citarum River as a function of other influencing aspects. A static net trawl (60 m x 10 m, mesh size 2.5 cm, and about 1 meter submerged) was installed under the New Muara Gembong Bridge for eight consecutive days in March and April 2021 or during the rainy season. The trapped debris was collected manually into boxes using two boats and simple tools. After the drying, weighting, classification processes and by excluding natural organics (leaves/branches), plastics contributed as the most dominant for both abundance (83%) and weight (31%) followed by textiles, hazardous materials, construction materials and rubbers. The hydrological conditions as well as the tides were also observed to be one of dominant parameters. The quantification of macro-plastic litter transport from River Citarum into the Java Sea is also an aim for the ASEANO project (ASEAN – Norway cooperation project on local capacity building for reducing plastic pollution in the ASEAN region).