bluuebunny/crossref_metadata_2025_split huggingface dataset:
Potential Carbon Footprint in Food System Based on Household Vegetable Consumption in Yogyakarta
Authors: Musthofa A , Rijanta R , Widiyanto D 
Published: October 2023

Abstract
Consumption is one part of the food system in a region. Food is a basic need that cannot be separated from various activities. Food systems account for about a quarter of the global carbon footprint, indicating that every activity in it will impact the environment. This study aims to explain the potential carbon footprint resulting from the vegetable consumption commodities in Yogyakarta as part of the food system. The city of Yogyakarta became the research area with the consideration that this area is an urban area with a high population density, a high proportion of waste transported to the final landfill, and the composition of organic waste, which is more than half the total volume of waste. This study uses secondary data from the Socio-Economic Survey (Susenas) from the BPS-Statistics Indonesia and relevant literature. A quantitative descriptive analysis technique was used in this study to explain the vegetable food consumption of the people of Yogyakarta City. The potential for carbon footprint and food waste is calculated using emission factors that include production activities up to distribution. The results show that eggplant has the highest potential carbon footprint based on consumption data, with an average value of 0.25 kg CO2-eq/kg per household in one week. The average potential carbon footprint of vegetable consumption per household in one week in Yogyakarta City is 1.9 kg CO2-eq/kg produce. Potential food waste based on consumption activities has an average value of 0.15 kg per household in one week.
Reef rehabilitation method uses bio transplants model in Tunda Island Banten Province, Indonesia
Authors: Mujiyanto M , Syam A R , Sugianti Y 
Published: October 2023

Abstract
Reef habitat degradation has an impact on both human activities and natural factors. It can motivate some people to preserve the coral reef ecosystem’s function in ecology and economics. According to Patent No. S00201908839 that Bio Transplants is a reef transplantation method that utilizes Dead Coral and Dead Coral with Algae as a media substrate to attach reef fragments. This study aimed to develop a reef rehabilitation method using the bio-transplants method. It does not need a specific skill like a scuba diver certificate. Conducted the research in July, November 2019, and July 2020 on the prototype model area. The result showed that the reef fragment survival based on November 2019 was 71.7 % of the total fragment in July 2019 (364 transplants). In July 2020, the colony component was 97.4 % after age ± twelve months from 239 pieces that grew since July 2019. Using the dry adhesive, since the fragments’ age ± four months had been associated with their substrate, their fragment section had been covered by the width increase of component become (become the colony of the reef). People have been trying “the bio-transplants method” included in their tour packages as marine ecotourism implementation.
Aboveground carbon stock of marine mangroves in Kepulauan Seribu Islands
Authors: Kusumaningtyas M A , Kepel T L , Ati R N A , Salim H L , Rustam A , Suryono D D , Daulat A , Sudirman N , Rahayu Y P , Hutahaean A A 
Published: October 2023

Abstract
Mangroves, as one of the important blue carbon ecosystems, store large amounts of organic carbon. In the last decades, carbon stock assessment in mangrove ecosystems has been increased intensely following international agreements targeted at reducing global carbon emission. Many studies have investigated carbon stock potential in mangrove ecosystems, however, little is known about carbon stocks of mangroves growing in carbonate setting in small islands. These marine mangroves usually receive little or no terrestrial input, thus may have limited nutrient availability to support their growth. Meanwhile, their contribution to a global carbon inventory cannot be neglected. Here, we assessed biomass carbon stock of marine mangroves in Kepulauan Seribu, Jakarta, by using published allometric equations. Data collection was conducted in seven small islands; Burung Island, Kongsi Island, Pari Island, Lancang Besar Island, Lancang Kecil Island, Pramuka Island, and Rambut Island. The total average aboveground carbon stock was 46.68 Mg C ha−1, with Rhizopora sp. as the dominant species. The highest carbon stock was measured in Pari Island (72.1 ± 30.4 C ha−1), followed by Lancang Kecil Island (62.4 ± 38.6 Mg C ha−1), Kongsi Island (54.1 ± 27.0 Mg C ha−1), Rambut Island (52.1 ± 21.6 Mg C ha-1), Burung Island (47.9 ± 21.0 Mg C ha−1), Lancang Besar Island (31.3 ± 13.8 Mg C ha−1), and the lowest was in Pramuka Island (6.8 ± 4.8 Mg C ha-1). Mangrove aboveground carbon in these islands were comparable to those in other areas. Having thousands of small islands, Indonesia thus has a significant contribution to global climate change mitigation.
The dynamic of sea level anomaly in the Papua coastal area and its associated response to the climate indices
Authors: Triana K , Solihuddin T , Nandika M R 
Published: October 2023

AbstractWith thousands of islands and a vast coastline, Indonesia is expected to suffer from severe and drastic impacts of sea level rise, not only to coastal urban areas and small islands but also to big islands with wetland ecosystems, such as Papua. Because the coastal areas are very sensitive to climatic and sea level changes, it is important to quantify the trends in sea level and the influences of climate variability in this region. This study aims to analyse the seasonal and interannual sea level anomaly in Papua coastal areas and investigate its associated response to climate indices. This study is performed based on the reprocessed satellite models of sea level height anomaly (SSHA) and Sea Surface Temperature (SST), climate index of Southern Oscillation Index (SOI), Dipole Mode Index (DMI), and Pacific Decadal Oscillation (PDO), from 1993–2021. The results showed that the rate of sea level rise in Papua is accelerating and significantly higher than the global trend by 0.54–1.03 cm/year. By performing statistical analyses, this study indicates that sea level in the northern waters is more sensitive to climatic phenomena, while sea levels in the southern waters are more responsive to seasonal drivers that influence the SST variability.
Faunus ater (Mollusca, Gastropoda) as a potential bioindicator contamination by heavy metals
Authors: Baharuddin N , Mustaffa N K , Ong M C 
Published: October 2023

Abstract
Heavy metals are one of the most harmful elemental pollutants due to their high toxicity that can affect humans. Some of the metals can have an adverse impact on the aquatic environment, even present in a lower concentration. The present study investigates the concentration of the selected heavy metals (Cu, Zn, Cd, Pb, As, and T-Hg) in Faunus ater (Mollusca, Gastropoda) that was collected from the rivers surrounding Universiti Malaysia Terengganu area. At each station, 25 individuals were collected. A total of 100 individuals of F. ater were collected at four different stations. The Teflon bomb digestion method was used to digest the samples after mixing them with 1.5 mL of suprapur nitric acid. Heavy metal concentration is analyzed using Inductively Coupled Plasma Mass Spectrometry (ICP-MS), model Perkin Elmer Elan 9000, and the pollution status is evaluated by Pollution Load Index (PLI). The concentration of heavy metal is varied within the stations. The average concentration of Cu, Zn, Cd, Pb, As, and T-Hg in F. ater was 29.7±1.29 µg/g dry wt., 42.1±7.77 µg/g dry wt., 0.26±0.04 µg/g dry wt., 0.58±0.08 µg/g dry wt., 2.17±021 µg/g dry wt. and 0.19±0.04 µg/g dry wt., respectively. One-way ANOVA test shows that for metal Cu, Zn, Pb, and As, there is no statistically significant difference in all stations (p > 0.05). A positive correlation of Cd, Cu, Zn, and Pb is observed with the size of F. ater, suggesting that the bioaccumulation process occurs in the F. ater. For metal and metal correlation, only Zn-Cd shows a moderate correlation compared to other metals and indicates that metals from the study area come from different sources of pollutants. The PLI value in the study area was recorded below 50, which indicated no detailed survey is needed. This study highlighted the potential use of mollusks such as F. ater as an excellent and reliable organism for heavy metal contamination indicators due to its capability to accumulate metals in body tissues.
Phytoplankton responds to environmental variables in Bali Straits, Indonesia
Authors: Susilo E , Tito C K 
Published: October 2023

Abstract
The ecological significance of phytoplankton within the small pelagic ecosystem cannot be overstated, as it serves as a vital food source for various marine biota, including larvae, juveniles, and small pelagic fish. This study marks the first investigation in the Bali Straits concerning the relationship between phytoplankton abundance and in situ environmental variables, employing an innovative additive model to develop a predictive system. The primary objective of this research is to elucidate the impact of environmental variables on phytoplankton abundance in the Bali Straits. During the year 2013, time series plankton samples and corresponding environmental variables, such as pH, nitrate (NO3), phosphate (PO4), chlorophyll-a (Chl), and silica (SiO3), were collected. Utilizing stepwise generalized additive models (GAMs), we assessed the response of two major phytoplankton groups, namely diatoms and dinoflagellates, to the prevailing environmental variability. Our findings unveil distinct response patterns for each group, with diatoms displaying a deviance explained (DE) of 38.40%, and dinoflagellates with 35.5%. Notably, both groups exhibited significant responses to NO3 and SiO3, while pH solely exerted a significant impact on dinoflagellates. In contrast, PO4 and Chl displayed comparatively lower influence on the abundance of both phytoplankton groups. This study contributes to a deeper understanding of the ecological dynamics in the Bali Straits and enhances our predictive capabilities in this critical marine ecosystem.
Coral reef rehabilitation sites selection based on seasonal waves and environmental quality as ecological supporting system on Mandangin Island
Authors: Prabowo B , Darus R F , Bramandito A , Cahyo A M D , Rikardi N , Rasyid N , Kurniawan F , Christian Y , Afandy  
Published: October 2023

Abstract
The natural rehabilitation process in the coral reef ecosystem requires a genuinely suitable environment minimum disturbance marine threats. Baby coral is a fragile organism used to increase the quantity of coral reef cover during rehabilitating coral reef ecosystems— determination for coral rehabilitation sites with minimum marine threats for increasing success. The destructive fishing around Mandangin Island induces a declination of live coral coverage. On average, live coral cover around Mandangin Islands is under 10 percent. However, there is high coverage of dead coral that is still functional as a shelter for reef fish in the southeast Mandangin Islands. The dead reef structure can still prevent the coastal area from high seasonal waves hitting the southeast coast from July to September. A large-scale reef structure makes it difficult for small-scale fishers to disturb the rehabilitation area. Water quality indicated that east-to-south coastal areas are considered coral rehabilitation sites. Unique water quality affects the coral adaptation on Mandangin Island. East to Southeast coastal areas are considered coral reef rehabilitation locations based on coral reef cover, water quality, and seasonal waves. The limitation of the coral fragment from Mandangin Islands became the most concerned variable for rehabilitation and reef-structure design to anticipate the seasonal waves.
Spatial Distribution of Tidal Flood in the Coastal Areas of Pandeglang Regency, Banten Using Landsat 8 OLI Imagery
Authors: Putri D A , Arhatin R E , Gaol J L 
Published: October 2023

Abstract
Coastal flooding is the overflow of seawater during high tide causing inundation in the coastal area with low elevation. This study aimed to determine the distribution of the tidal flood area on the coast of Pandeglang Regency, Banten, using the geospatial information system method. The distribution of the flood area is obtained from the separation of land and water areas with the use of Landsat 8 OLI imagery extraction which will be adjusted to land elevation data from DEMNAS. The distribution area of the flood is also determined by other factors such as land subsidence, wind speed and direction, rainfall, and tides at the research location. The results show that in December 2020 the highest tide reached 0.736 m, the highest rainfall accumulated was 25.6 mm per day, with the wind direction dominated towards the west with a speed of 3.60 m s–1 – 8.80 m s–1, and the land subsidence rate varied spatially from 1-14 cm year–1. After combining the data, the distribution of flood areas in Pandeglang Regency showed that there was 1.232 ha or 3.64% of an inundated area on the coast of Pandeglang Regency with 4 sub-districts affected by the flood.
Mangrove forest encroachment by Nypa frutican, Derris trifoliata, and Acanthus spp. in Segara Anakan Lagoon
Authors: Prayudha B , Siregar V , Ulumuddin Y I , Prasetyo L B , Agus S B , Suyadi  , Suyarso  , Salatalohi A , Anggraini K 
Published: October 2023

Abstract
Based on phytosociological methods and land cover change analysis, previous studies in Segara Anakan Lagoon (SAL) indicated the spreading of mangrove species living in the forest margin ecotone into the forest interior, encroaching the other mangrove communities. This current study aims to quantify the spreading pattern of those mangrove species, assess the effect of the spreading of those mangrove species to the other mangrove communities, and identify the location of the spreading pattern relative to the newly emerged islands. The spreading pattern can be demonstrated by analyzing landscape structures quantified by landscape metrics. It was done using multi-temporal mangrove maps, representing the changes in mangrove communities over four periods with a decade interval. The landscape metrics used were the aggregation index, the size of community patches, and the distance between the patches. These metrics were extracted by using landscape metrics, an R package. The changes in the metrics over time were compared namely 1990, 2000, 2010, and 2020. The results showed that the small patches of the forest margin species became more aggregated into a larger patch, while the mangrove forests became more fragmented. This condition occurred most in the west part of SAL where the new islands emerged.
Target strength of Nile tilapia (Oreochromis niloticus) from 200 kHz calibrated fish finder and scientific echosounder: laboratory measurement and modeling
Authors: Dwinovantyo A , Solikin S , Triwisesa E , Triyanto T 
Published: October 2023

Abstract
Target strength (TS) values from laboratory measurement and TS values from the model were measured and calculated from Nile tilapia (Oreochromis niloticus). Nile tilapia is one of the fastest growing aquaculture species, the fourth most produced fish globally, easily available in various sizes and lengths, and more importantly, it has a one-chambered swimbladder, which is suitable for TS measurement and modeling. The most common technique of measuring fish TS is utilizing a scientific echosounder. However, this instrument has a low implementation for small-scale fisheries due to its relatively high cost compared to the conventional fish finder. Thus, the objective of this study is to offer a solution that considers the instrument’s cost and usefulness using calibrated fish finder and scientific echosounder. TS values were produced by the two instruments that later being examined with TS from the Kirchhoff-ray mode (KRM) model to validate the result. Two single-beam echosounder instruments (Furuno FCV-628 fish finder and Simrad EK15 scientific echosounder) operated at a frequency of 200 kHz were used to assess the TS values for 30 samples of living Nile tilapia whose total length (TL) was in a range of 6 to 26 cm. In conclusion, statistically, the results showed no significant differences in TS measurement between the two instruments compared to TS values from the model. The TS values from the KRM model agreed well based on the regression analysis with the TS values from both instruments in the laboratory measurement.
Preliminary study on restoration of tropical seagrass ecosystem through utilization of Enhalus acoroides seedling in Bintan Island, Indonesia
Authors: Nugraha A H , Addini I , Halim M , Darus R F 
Published: October 2023

Abstract
There has been a global decline in the area of seagrass ecosystems caused by the increasing number of human activities in coastal areas. It is suspected that the decline in the area of seagrass beds in Indonesia is 2%-5% per year. It takes an effort that can be used to restore the condition of seagrass beds. So far, efforts have been made to do seagrass transplants. There is a weakness in the transplant method, namely the reduction of seagrass stands in the origin (donor) area. Another effort that can be used is planting seagrass using seagrass seeds derived from seedlings. Seagrass seeds come from the seagrass, Enhalus acoroides, which is found throughout the year in the waters of Bintan Island. Furthermore, the seeds obtained will be sown for three months in the laboratory. Generally, the survival rate of seagrass seeds during the seedling process has a value of more than 90%, which is very good. Furthermore, the seeds produced from the nursery process are planted in the field. In this experimental study, 25 seedlings were planted. Seedlings were planted directly into the substrate at a depth of 10 cm (sprig method). During the four-month observation period, the survival rate declined to 20%. Several factors that affect the survival rate include the condition of the aquatic environment and human activities around it.
The Utilization of Seasonal Variation of Ocean Wave Characteristics Identification in Monitoring the Chlorophyll-a Distribution in South Sulawesi
Authors: Islami M F , Jasruddin  , Sujiono E H 
Published: October 2023

Abstract
South Sulawesi is one of Indonesia’s provinces with various forms of waters around its territory, such as the sea, strait, the Spermonde archipelago, and bay. This geographical condition makes it interesting to examine what phenomena can affect the characteristics and variability of ocean waves in each type to increase efficiency and effectiveness in carrying out activities in the waters, especially fishing. By utilizing the BMKG Ina-Waves wave model and NASA’s Aqua MODIS satellite image, the characteristics and variations of ocean waves and the level of fertility of the waters around South Sulawesi Province can be seen. Based on the climatological analysis of wind, ocean waves, and the distribution of chlorophyll-a in this study, the results showed that the Asian and Australian monsoon phenomena greatly influenced these three parameters. The monsoon winds increase the average wave height and affect the distribution of chlorophyll-a concentrations in the waters of South Sulawesi and its surroundings. Efficiency and effectiveness of fishing at sea are carried out during the transition season in the coastal waters of South Sulawesi so that the risk of sea accidents can be minimized.
Estimation of diffuse coefficient attenuation (Kd
490) using sentinel 2A in Panggang Island and its Surrounding Water
Authors: Tiarasani A , Siregar V P , Gaol J L 
Published: October 2023

Abstract
In marine remote sensing areas, the intensity of the light that enters the water column will decrease exponentially with increasing depth due to scattering and absorption. The process of reducing intensity is called the attenuation process. This process became a limiting factor in detecting objects at the bottom and water column using a remote sensing method that depends on light intensity. Diffuse attenuation coefficient (Kd
) is an important optical property of seawater because it provides information on water clarity and the level of light attenuation. This research analyzed the Kd and its variability from in situ measurement and Sentinel-2 level 2A MSI (Multi Spectral Imagery) data in Karang Lebar, Panggang Island, and Air Island, in Seribu Island, North Jakarta. We determined the Kd
(490) value using several algorithms. The result showed that Kd
(490) in situ and from the model has a good correlation (r = 0.75 – 0.86).
Mapping reef terrain roughness and benthic habitat complexity in the Pamegaran Island, Kepulauan Seribu National Marine Park
Authors: Batubara S R , Agus S B , Sunuddin A 
Published: October 2023

Abstract
The formation of coral cays in the Kepulauan Seribu Marine Parks, Jakarta Special Capital Region, is the result of patch reef evolution which linked to the geology of sediment accretion, including the ecology of coral growth and competition of benthic community. This study aims to map the level of reef complexity in Pamegaran Island using Benthic Terrain Modeler. Field observation to monitor benthic communities in four stations at 3- and 5- meter depth was combined with SPOT-7 image processing to evaluate in situ rugosity, 3-dimensional bathymetry and benthic habitat classification. The results of this study revealed low degree of terrain complexity as results of habitat degradation and dominant benthic class of sand. Classification of reef benthic habitat resulted in five classes, namely sand (Sd= 126.65 ha), seagrass (Sg= 35.29 ha), bare rubble (Rb= 32.68 ha), reefs dominated by dead corals (DC=3.16 ha) and dead coral with algae (DA= 20.50 ha); with 67.21% score of overall accuracy (OA). In situ rugosity at 5 m was higher than 3 m, as result of higher coverage of live corals particularly in the east site. Similar profile was shown for rugosity index, which reflects ratio between surface to planar area and seafloor gradient along the reef slope. Finally, positive correlation between reef surface and in situ rugosity implies the importance of live coral communities in supporting complex terrain and benthic habitat in the patch reef environment.
Distribution of heavy metals in water and sediment at the Bojonegara nearshore of Banten Bay, Indonesia
Authors: Sari J E W , Prartono T , Sulistiono  
Published: October 2023

Abstract
Heavy metals released to a nearshore environment may vary due to contaminant sources and the seasonally coastal processes. This study revealed how the seasonal variability and potential sources controlled the distribution pattern of several heavy metals and the level of water quality in Bojonegara nearshore of Banten Bay. The water and sediment samples were collected once in January, February, August, September, and October 2020 at six stations representing the river and sea. Heavy metal was determined using the APHA procedure. Cu was detected in August-October, ranging from <0.002 – 0.008 mg/L. The concentrations of Cu, Cd, and Pb in the sediment were detected, varying from <0.02 to 3.90 mg/kg, <0.02-1.68 mg/kg, and <0.02-6.71 mg/kg, respectively. The concentrations of the concerned metals in sediment vary, and their distribution pattern change seasonally. These metals in water and sediments were still safe for the environment and marine biota. This study suggests how contaminant sources and coastal processes could control the contaminant level. In addition, potential sources of heavy metal merely derived from onshore of the Bojonegara, but it could be derived from advection from other areas through the coastal processes.