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The abundance and diversity of Odonata along an altitudinal gradient in East Java, Indonesia
Amin Setyo Leksono,Bambang FERIWIBISONO,Teguh ARIFIANTO,Ahmad Febri PRATAMA 한국곤충학회 2017 Entomological Research Vol.47 No.4
Odonate diversity in East Java was surveyed, and samplings were made during 2 years in ten sites along an altitudinal gradient. The characteristics of odonate assemblages in East Java were analyzed regarding of the number of individuals, the number of species, and Shannon's diversity index. The differences in abundance, species richness, and diversity between study sites were analyzed by an independent t‐test. There were 3270 individuals of Odonata belong to 30 species, 7 families and 2 suborders identified from all study sites. The abundance, species richness and diversity of Odonata varied between study sites. The greatest abundance of Odonata was found in Malang Coban Talun (MCT) (148.8 ± 9.5), while the lowest was in South Beach Forest (SBF) (14.4 ± 3.6). The highest species richness and diversity was found in Malang Paddy Field (MPF) (richness =14.4 ± 0.8 and H′ = 2.4 ± 0.1), while the lowest was found in South Coastal Area (SCA) (richness =2.8 ± 0.1 and H′ = 0.4 ± 0.1). A significant positive correlation was detected between the elevation and overall odonate abundance (P < 0.05), while there was not significant correlation between that and odonate species richness and diversity.
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Optimization of a Grid-Tied Microgrid Configuration using Dual Storage Systems
Petrus Yuri Nugraha,Augie Widyotriatmo,Edi Leksono 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10
This paper presents optimization in capacity sizing and operational schedule for a grid-tied microgrid using dual storage systems. Photovoltaic power system is used as a renewable energy source. Pumped-storage hydroelectricity and battery energy storage system are utilized as energy storage systems. The physical models of the photovoltaic system, pumped-storage hydroelectricity, and battery energy storage system are developed. The objective function is formulated to minimize capital and operational costs of grid-tied microgrid system. The constraints for the optimization are formulated based on the system model, operational limitations, and performance requirements. Capacity and operational schedule for the microgrid system is optimized using solar insolation data and load demand data. Performances required for microgrid system are high renewable energy penetration with low curtailed renewable energy. Mixed integer linear programming (MILP) is used to solve the optimization problem. With the proposed method, renewable energy penetration ratio achieves 50%. The curtailed renewable energy ratio of 10.4% is obtained.
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Natural and anthropogenic impacts on mangrove carbon dynamics: a systematic review protocol
Gilang Qur’ani Citra,이보라,Sasmito Sigit D.,Maulana Agus Muhamad,설미현,Wiradana Putu Angga,Leksono Budi,Watiniasih Ni Luh,Baral Himlal 한국산림과학회 2024 Forest Science And Technology Vol.20 No.1
The mangrove ecosystem serves as a vital habitat for coastal flora and fauna while playing a crucial role in storing and sequestering carbon as part of global carbon cycles. Therefore, it is imperative to evaluate the carbon dynamics, encompassing storage and sequestration, within mangrove ecosystems and their interconnectedness with natural climate fluctuations and anthropogenic influences, including land-use and land-cover changes (LULCC). Although there has been an increase in monitoring data and literature on mangrove carbon dynamics over the past two decades, there is still limited understanding regarding how climate variability, when combined with anthropogenic drivers, moderates the resilience of carbon storage and sequestration in mangroves. This study aims to build upon and enhance the previous systematic review conducted by Sasmito et al. (2019). Our specific objectives involve collating more recent literature published since 2018 and strengthening the analysis of carbon loss and recovery in tree biomass across different species, as well as its correlation with local and regional climate variations. Additionally, we will explore the impact of various types of land-use and land-cover changes on mangrove forests. Our systematic review will focus on field-based data collected from the Asia Pacific mangrove region, which represents the world’s largest and most diverse mangrove ecosystem and has been extensively studied in comparison to other regions, as indicated by previous systematic reviews. To gather relevant literature, we will conduct comprehensive searches across various databases, including Scopus, Web of Science, and Google Scholar. The structure established by Sasmito et al. (2019) for literature search, screening, and data extraction will be adopted. Data analysis will involve comparing carbon storage and sequestration under locally and regionally varying climatic conditions and anthropogenic influences. Furthermore, we will employ geographical mapping techniques to visualize species distribution and diversity with
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