Judul: Distribusi spasial dan pengelolaan lamun (Seagrass) di Teluk Bakau, Kepulauan Riau
Abstrak: Seagrass beds as ecosystem in the coastal areas will continue to experience change by various reasons, so that research on the spatial distribution of seagrasses also be done. Data and information obtained not only for science but also for the management of resources. The study was conducted approximately 2 weeks in August 2010 using a combination of the usual method on coral reef that is, "Line Intercept Transect " and"Stop and Go". During the study found 10 of 13 species of seagrass and its spread from the coast towards the edge of generally continuous. This causes no seagrass was found living in the area monospesifik and not undergo significant ecological disturbance. Characteristics of habitats, community structure, threats and seagrass management plan involved are discussed.
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Judul: Design conservation of seagrass for sustainability of fish resources in the Tanjung Luar, East Lombok
Abstrak: Seagrass ecosystem has a vital role in the marine environment as a habitat for marine biota, primary productivity, regulate the trophic level of species and populations and gas regulations for the balance of CO2 and O2 through the photosynthesis of mechanism. The purpose of this study is to analysis the ecology of seagrass (seagrass conditions, threat of damage to seagrass, the abundance and diversity of fish species), the social aspect (local ecological knowledge and community values local knowledge). Data was collected by survey and observations. Data analysis was conducted descriptively to explain the condition, potential threats and sources of damage to the seagrass and regression models was used to explain the number of species and aossociation of fish to seagrass. These results indicate the condition of seagrass at the study site in the category of normal, the number of seagrass species was nine species of the total area of 154.21 ha of the seagrass and seagrass community types was a mixed type. Type and number of fish species obtained from 42 families comprising 118 species and 16 049 individuals. The most fish appropriate regression model to explain the number of species and individual fish associated with seagrass is quadratic and exponential models. Fish species diversity is the highest in Gili Maringkik (2.942) and the lowest is in Gili Kere (2.448). Seagrass damage parameters can be seen from the status of marine species such as the scarcity of fish, sea cucumbers, shrimp and molluscs as well as the number of damaged seagrass biomass/day by the community. Ecological communities have sufficient knowledge to know seagrass species as well as the function of the environmental and economic benefits to society and have the local knowledge that is relevant to the conservation namely awiq-awiq. The conclusion of the study is the management of the seagrass beds to the sustainability of fish can be done through seagrass conservation strategy with the zoning system through : (1) integrate the existence of ecology as an instrument in the management and the conservation design, (2) accommodate the ecological knowledge and indigenous communities and (3) zoning can be made in the management of the core zone in the seagrass zone the Gili Kere and sustainable fisheries in the seagrass beds in other locations.
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Judul: Photosensor producing based on ferroelectric material of Ba0,5Sr0,5TiO3 doped by Ferrium Oxide (Fe2O3) on a P-Type Silicon Substate Si (100) applied as a digital camera with a single pixel image sensor
Abstrak: Thin film Ba0,5Sr0,5TiO3 (BST) doped with Fe2O3 was grown on p-type silicon substrate (100) using chemical solution deposition (CSD). It used the solvent 2-methoxyethanol with annealing temperature of 850°C and the doping treatment Fe2O3 of 2.5, 5, 7.5, 10 % of the mass formed BST. Pure BST had the highest absorption of 600 nm of light wavelength. Additions Fe2O3 moves highest absorption in the range of 560 nm. Fe2O3 addition was strengthening thin film sensitivity to the effects of light. In general, doping Fe2O3 10% was result the best absorbance and current-voltage of BST thin film. Electrical properties of thin films BST include dielectric, photoconductivity, and dissipation energy. Based on the current-voltage (I-V) analysis, pure BST and doped BST showed photodiode properties. Dielectric values obtained in the range from 23.32 to 243. Based on electrical conductivity data and energy dissipation, BST thin films have shown photodiode characteristics and are therefore suitable as light sensors. The image sensor in a digital camera is also a light sensor. This BST thin film has been scientifically proven to be a light sensor and also it can be applied as an image sensor. This is a novelty image sensor based on thin film Ba0.5Sr0.5TiO3.
Keyword: barium strontium titanate, thin film, photodiode, image sensor, digital camera