Judul: Kompleksitas Habitat Berdasarkan Jenis Gangguan Di Bukit Bintang Dan Bukit Angsana Bogor
Abstrak: The role of disturbance in shaping biodiversity is widely recognized as a key components of all ecosystem. In this context, human can contribute to the physical disturbances changes, through construction activities in certain landscape or forest followed by desired purposes such as the interest of tourism. Therefore, the value of each landscape necessary to defined, well prior to being used as a nature-based tourism site and it makes them easier to monitor that may influences the quality of a habitat. Considering this alteration, this research aims to analyze the habitat complexity in several landscapes as the consequences of the different type of disturbances in Leuwiliang, Bogor, West Java Province. The research methods consisted of study area identification, microclimate measurements, assessment of habitat complexity parameters, sampling of soil arthropods, identification of soil arthropods, and data analysis. The result showed that habitat complexity index in Secondary Forest, Bukit Angsana, and Bukit Bintang, respectively; 9, 4, and 3. The Shannon-Wiener diversity index in Secondary Forest and Bukit Angsana; 0.78 (low diversity) and Bukit Bintang; 1.25 (moderate diversity). The obtained abundance of soil arthropods in the Secondary Forest, Bukit Angsana, and Bukit Bintang, respectively; 138, 178, and 162. Landscape changes caused by different types of disturbances such as plantations and tourism areas revealed a decrease in their habitat complexity. This alteration in disturbed areas was mostly caused by highfrequency of disruption within forest conversion. For instance, land clearing activities are routinely carried out by tourism management to maintain the cleanliness of the tourism environment. This factor contributes to the slight composition of ground herbage and leaf litter presence in the soil, especially of the litter dwelling arthropods when litter or herb layers are removed frequently. Moreover, anthropogenic disturbances by plantation management and plot maintenance could also affect towards the local species richness and abundance patterns. Lastly, the soil arthropods abundance and diversity on the specific or certain land has their own function and usability to support the assessment of habitat complexity which represented.
Keyword: Ecosystem Function Analysis (EFA), landscape alteration, nature-based tourism, soil arthropods

Judul: Tipologi Pengunjung Berdasarkan Jenis Gangguan di Taman Wisata Alam dan Cagar Alam Pananjung Pangandaran
Abstrak: Building visitors typology based on disturbance types is important for tourism planning in protected area. Research was conducted in Pananjung Pangandaran in June 2014. Disturbances that were observed include: flower picking, mushroom collection, wood burning, wildlife feeding, chasing monkey, sand dredging, collections of various marine life including coral, shell, fish and other marine creatures. A direct relationship could be observed between visitor characteristics and types of disturbances. The results emphasized the importance of age class, visitor group, main motivation for visiting, visit frequency and time spent in an area. The sub-characteristics of these characteristics varied with primary attractions, i.e beach and open area. Visitor typology in Pananjung Pangandaran based on disturbance types in beach area were player, family, beach visitor, first timer and long stay types, while for open area comprised of active enjoyment of nature type, friends, comfortable naturalist, frequent and long stay types.
Keyword: Bogor Agricultural University (IPB), protected area., visitor management, disturbance, visitor typology, Pananjung Pangandaran

Judul: Membran polistirena dengan ragam suhu perendaman untuk pervaporasi alkohol
Abstrak: Polystyrene membrane with PLURONIC as porogen, can be utilized in alcohol pervaporation. The polystyrene membrane was made by reverse phase method which was started with making of polymeric mixed solution between polystyrene and PLURONIC in dichloromethane with 2 different compositions, i.e.-polystyrene :PLURONIC:dichloromethane 17:0:83 and 17:1:82. The solution was stirred up for 5 hours with ultrasonic and casted on the glass plate surface, and then it was immersed into water at 40, 50, and 60 oC. The highest pervaporation result was 90,2% alcohol purities at 50 oC immersion temperature. However, this result was not good enough because the alcohol purities was lower than the standard alcohol purities at 91,6%.
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