Bagyo Yanuwiadi

Soil Arthropods Diversity in Manggis Natural Reserve and Coffee Agroforestry System Kediri Regency, Indonesia

Soil arthropods have role as herbivores, decomposers, predators and bioindicators of the various functions on ecosystems. Soil arthropods have an important role in increasing and maintaining soil productivity through the decomposition process of organic matter. The research was conducted to investigate abundance and diversity of soil arthropods in Manggis Natural Reserve and Coffee Agroforestry System. Hand-shorting methods and pitfall traps were used to catch soil arthropods. The abundance of soil arthropods were analyzed into diversity index. The result showed that the Natural Reserve has higher family number of soil arthropod and diversity index than the Agroforestry System. Individual of Hymenoptera order is very abundant in both location.

Water Carrying Capacity Approach in Spatial Planning: Case Study at Malang Area

The Law of the Republic of Indonesia Number 32 of 2009 and 26 of 2007 affirms that need environmental carrying capacity in preparation of regional spatial plans. The Great Malang bypassed 12 sub-watershed which is 4 of them pass 3 regency / city directly. Therefore, it needs an integrated spatial arrangement between the three regions. The purpose of this research is to formulate study of water carrying capacity (WCC) and recommendation for input in spatial planning in Malang area. The results of the water carrying capacity study show that Metro and the Bango Sub-watershed is very worrying because its critical condition has been exceeded before 2015. While the Amprong and Manten sub-waters are still safe until 2030. Key word: Amprong, Bango, Manten, Metro, Sub-watershed, Water carrying capacity

Economic Valuation of Mangrove Forest Ecosystem in Teluk Ambon Baguala District

This study aims to describe about economic valuation of mangrove forest ecosystem in Teluk Ambon Baguala District. This research is a quantitative research. Data were collected through interviews, documentation and observation. Method analysis employed was total economic value. Overall, the economic value of mangrove forest ecosystem service is Rp. 7.273.222.250 per year, with the following description: Passo for Rp. 3.858.009.750 per year, Negeri Lama for Rp. 945.628.100 per year, Desa Nania for Rp. 650.750.400 per year and Waiheru for Rp. 1.818.834.000 per year.

The effectiveness of leachate remediation in the implementation of unvegetated constructed wetland

The objective of this research was to examine the effectiveness of leachate remediation that is performed through the implementation of a free water surface (FWS) unvegetated constructed wetland system (UCW). The abovementioned remediation was conducted in a glass house with complete randomized design and using a small-scale UCW referred to as UCW reactor. The reactor was designed to replicate a large-scale FWS UCW and was filled with sand and gravel in a 3:5 ratio. The measurements of the leachate quality throughout the remediation experiment were based on hydraulic retention time (HRT) calculation and carried out on the 1st, 5th, 10th, 15th, 21th and 30th days. Subsequently, the resulted homogenous measurements were analyzed using One-way ANOVA while the non-homogenous ones were analyzed using the Brown-Forsythe test. For further analyses on the resulted statistical data, Turkey-HSD or Games Howell test and Euclidean-distance clustering and biplot were applied. The data representing value decreases in t...

Mangrove Vegetation Structure and Its Carbon Stock Potency in Bunaken National Park, North Sulawesi

Aims of this research are to describe structure of mangrove vegetation and its potential of carbon stock in northern area of the Bunaken National Park. Totally, there are about 18 mangrove species growing in coastal area of Bunaken. In Teling areas, R. mucronata and S. alba become two co-dominant species in plot 1, S. alba become important species in plot 2, and R. apiculata is the important species in plot 3. Avicennia marina become the most important species in Rap-rap. In Pungkol, B. sexangula has highest value of important value index in Plot 1, followed by R. mucronata in Plot 2 and B. parviflora in plot 3. In Wawontulap areas, B. parviflora has the highest value of important value index. The highest carbon stock was found at Rap-rap (ca. 1784,68 Mg/ha) and the lowest was found at Wawontulap (390,03 Mg ha -1 ). The highest necromass was found at Teling (ca 208,79 Mg ha -1 ) and the lowest was found at Wawontulap (ca. 21,30 Mg ha -1 ). Mangrove ecosystem in the Bunaken National Park is important for global warming mitigation through their ecosystem ability to absorb CO2 and store carbon into vegetation biomass and necromass.