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"Papua has been experiencing heavy logging activity in its forests for decades . However, only several studies focused on the effect of logging in the forest ecosystem. This research was aimed to analyze recovery processes of the forest ecosystem. The research was conducted in the logged tropical rainforest in South Papua using ecological approach which used tree communities as biotic and soil condition as abiotic indicators. Data were collected in the logging area of PT Tunas Timber Lestari located in the tropical rainforest of South Papua. There were five groups of forests used in this research i.e. unlogged, one year post selectively-logged, five years post selectively-logged, ten years post selectively-logged and fifteen years post selectively-logged forests. Thirty nested plots were laid on each forest group. Canonical Correspondence Analysis (CCA) was applied to analyze the understory and upperstory plant communities. Understory and upperstory plant communities formed different patterns due to logging. Plant communities in the ten and fifteen years post-selectively logged forests were not similar to those in the unlogged forest. Soil organic matter (SOM) content in the selectively logged forests was lower than that in the unlogged forest. These occurrences indicated that the selectively logged forests were still recovering and required more than fifteen years to be fully recovered."

"Forest fire is a massive threat towards tropical forest causing various negative impacts to nature and human being. Forest fire often leads to alteration of forest structure and its functions. This study of tree growth after forest fire was conducted using a model simulation. The model was performed at the individual level of plant community and built to analyze the potential of tree growth and its scenario for post-fire recovery. Five important tree species from montane forest of Mount Ciremai were chosen to build the model based on four main parameters i.e. plant growth rate, diameter at breast height (DBH), tree-to-grass competition and tree-to-tree competition. The scenario of post-fire recovery was performed by replanting similar species with 5 cm DBH seedling. Prediction from our model showed that most of the chosen species would recover to its pre-fire condition after 37 - 50 years. Considering the limitation of competition after re-planting, it was suggested to minimize tree to tree competition and applied silvicultural treatments to maximize tree growth and tree community recovery."

"Peningkatan emisi gas karbon dioksida mendorong terjadinya pemanasan global dan perubahan iklim. Tanah memiliki kemampuan menyimpan emisi gas karbon dioksida yang diserap oleh vegetasi. Kajian mengenai dinamika fluks emisi gas karbon dioksida tanah dengan perbedaan persentase tutupan kanopi vegetasi di ekosistem Hutan Kota Srengseng belum pernah dilakukan. Penelitian ini bertujuan untuk menganalisis dan membandingkan dinamika fluks emisi gas karbon dioksida tanah di ekosistem Hutan Kota Srengseng dengan perbedaan persentase tutupan kanopi vegetasi serta menganalisis hubungan antara suhu udara, kelembapan tanah, suhu tanah, dan derajat keasaman (pH) tanah dengan fluktuasi emisi gas karbon dioksdia tanah. Metode penelitian yang digunakan adalah metode penangkapan gas rumah kaca menggunakan chamber, pengukuran faktor lingkungan, dan analisis data menggunakan uji ANOVA dan korelasi Spearman. Hasil penelitian serta kesimpulan peneleitian menyatakan bahwa nilai fluks emisi gas karbon dioksida tanah tidak berbeda signifikan di berbagai tutupan kanopi vegetasi Hutan Kota Srengseng. Lebih lanjut, faktor lingkungan yang memiliki hubungan terhadap fluks emisi gas karbon dioksida di Hutan Kota Srengseng, yakni suhu tanah, kelembapan tanah, dan derajat keasaman (pH) tanah, kecuali suhu udara.

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Increasing carbon dioxide gas emissions encourages global warming and climate change. Soil can store carbon dioxide gas emissions, which are absorbed by vegetation. Studies on the dynamics of soil carbon dioxide gas emission fluxes with differences in the percentage of vegetation canopy cover in Srengseng Urban Forest ecosystem have never been carried out. This research aims to analyze and compare the dynamics of soil carbon dioxide gas emission fluxes in Srengseng Urban Forest ecosystem with different percentages of vegetation canopy cover and analyze the relationship between air temperature, soil moisture, soil temperature and soil acidity (pH) with carbon gas emission fluxes soil dioxide. The research method used is the greenhouse gas capture method, which uses a chamber to measure environmental factors and data analysis using the ANOVA test and Spearman correlation. The research results and research conclusions state that no significant difference between the percentage of vegetation canopy cover of the Srengseng Urban Forest and the flux of carbon dioxide gas emissions. Environmental factors related to the flux of carbon dioxide gas emissions in Srengseng Urban Forest are soil temperature, humidity, and acidity (pH), except air temperature.

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"Gewang (Corypha utan Lamarck),a wild or semi-wild palm species distribute widely in Nusa Tenggara savanna with great potential (as building materials,drink and food),as traditionally have been exploited and utilized by local villagers for ages...."

"Natural mortality of trees is extremely variable due to the uncertainty and complexity of the functioning of forest ecosystems. The objective of this study was to develop a stand-level mortality model for Acacia mangium species by relating mortality to stand variables that affect the natural mortality process. The model was developed using data from l97 permanent sample plots measured periodically at 1-yr time intervals from 2-4 years until 8-11 years after planting in South Sumatra, Indonesia. The model consists of two complementary equations. The first equation is a logistic function predicting the probability of mortality incidence depending on stand density, site index and stand age. The second equation estimates the reduction in the number of surviving stems observed in a stand where natural mortality occurs. Nine equations were fitted using data from permanent sample plots where trees died over the time period and the best model was selected. Estimates from this second model were then adjusted by a factor equal to the probability of mortality applying three different approaches: probabilistic two-step, deterministic threshold and stochastic. All methods revealed no significant difference between the observed and the predicted number of surviving stems per ha. The probabilistic two-step approach, however, produced more consistent and the most accurate estimates. This method should provide reliable prediction when it is to be used in forest productivity prediction and management system for the species."

"Tambak terlantar merupakan man made breeding places pada daerah endemis malaria di ekosistem pantai Pengelolaan habitat perindukan vektor dapat memutuskan rantai penularan malaria Penerapan manajemen terpadu yaitu manajemen kasus dan manajemen lingkungan dalam pengendalian malaria merupakan key alternative terutama pada daerah endemis dengan jumlah habitat perindukan vektor berupa tambak terlantar yang luas Pengelolaan tambak terlantar perlu menerapkan prinsip berkelanjutan yaitu mempertimbangkan aspek ekologi ekonomi sosial kelembagaan dan teknologi Tujuan penelitian ini adalah merumuskan model pengendalian malaria melalui pengelolaan habitat perindukan vektor berkelanjutan Lokasi penelitian adalah desa Sukarame Sukamaju dan Kampung Baru Kecamatan Punduh Pedada Kabupaten Pesawaran Propinsi Lampung Metode yang digunakan untuk pemilihan alternatif pengelolaan tambak terlantar berkelanjutan yaitu Analytical Network Process ANP Penyusunan model pengendalian malaria melalui pengelolaan habitat perindukan vektor menggunakan metode System Dynamics Hasil penelitian menunjukkan bahwa urutan alternatif pengelolaan tambak terlantar agar tidak menjadi habitat perindukan vektor yang mempertimbangkan aspek aspek keberlanjutan adalah budi daya ikan Nila Bandeng 27 Budi daya udang 22 rehabilitasi mangrove 18 mengeringkan tambak 12 mengalirkan air laut ke tambak 10 dan membersihkan ganggang atau lumut 9 Urutan kriteria yang menjadi pertimbangan dalam pemilihan alternatif pengelolaan tambak terlantar adalah aspek lingkungan 26 sosial 24 Teknologi 18 Kelembagaan 17 dan ekonomi 15 Skenario terbaik pada model pengendalian malaria melalui pengelolaan habitat perindukan vektor berkelanjutan dilakukan dengan intervensi predator 60 dan rehabilitasi mangrove 10 Pengelolaan tambak terlantar membutuhkan keterlibatan lintas sektor yaitu instansi Dinas Perikanan 70 pengusaha tambak 80 peran serta aktif masyarakat 50 dan keterlibatan instansi Dinas Kesehatan 70 dalam manajemen kasus malaria Pengendalian malaria melalui pengelolaan habitat perindukan vektor berkelanjutan dapat menurunkan habitat perindukan vektor 8 28 kepadatan larva Anopheles sp 55 2 nyamuk Anopheles sp 11 68 dan kasus malaria 25 78

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Derelict ponds are man made breeding places in endemic areas in coastal ecosystems Vector breeding habitat management can break the chain of transmission of malaria Implementation of the integrated management of case management and environmental management in malaria control is a key alternative especially in endemic areas by the number of vector breeding habitats such as ponds abandoned areas Management of abandoned farms need to apply sustainable principles that consider the ecological economic social institutional and technological The purpose of this study is to formulate a model of malaria control through sustainable management of vector breeding habitats The research location is the village Sukarame Sukamaju and Kampung Baru Punduh Pedada subdistrict Pesawaran district Lampung province The method used for the selection of alternative sustainable management of derelict ponds were Analytical Network Process ANP Modeling the control of malaria through vector breeding habitat management using System Dynamics The results showed that the sequence of alternative farm management so as not to be stranded vector breeding habitats that considers aspects of sustainability are Tilapia aquaculture Milk 27 shrimp cultivation 22 rehabilitation of mangroves 18 dry ponds 12 sea water flowing into the pond 10 and cleaning algae or moss 9 The order of the criteria to be considered in the selection of alternative to derelict farm management are environment 26 social 24 technology 18 institutional 17 and economy 15 The best case scenario in a model of malaria control through sustainable management of vector breeding habitat is done by the intervention predators 60 and mangrove rehabilitation 10 Management of abandoned farms that require cross sector involvement Fisheries agencies 70 farm employers 80 public participation 50 and the Public Health Service agency involvement 70 in malaria case management Control of malaria vector breeding habitat through sustainable management can reduce vector breeding habitats of 8 28 density of larval Anopheles sp 55 2 the mosquito Anopheles sp 11 68 and decrease malaria cases of 25 78 "