Hasil Pencarian  ::  Simpan CSV :: Kembali

"Tropical savannas and dry forests in Indonesia are important types of ecosystems which provide habitat to support various endemic wildlife. Several of these endemic species are now seriously threatened and accordingly have high conservation status according to IUCN, including the Bali starling (Leucopsar rotschildi) which is mostly now restricted to the Bali Barat National Park. Given the high extinction risk facing such species, conservation programmes are likely to require multidisciplinary approaches that address both the biological attributes of the species itself, as well as their habitat requirements. Regrettably, for many species, their habitat ecology remains inadequately understood. The objectives of this paper are to: 1) characterise the habitat of the Bali starling in terms of structure and floristic composition; and 2) document evidence of vegetation cover changes in the Bali Barat National Park. Analysis of remote sensing imagery as well as field sampling for vegetation attributes was conducted to address these objectives. Normalized Difference Vegetation Index (NDVI) was calculated from Landsat imageries using red and near infrared bands. Tree cover percentage data were downloaded from Vegetation Continuous Fields (VCF) product from the University of Maryland’s website. Results showed that forest and savanna are the dominant land cover types in the Bali Barat National Park but their distribution is somewhat dynamic with changes in vegetation cover and greenness found across the years in which increasing cover of woody plants is the general trend. In the Bali Barat National Park, the Bali starling is mostly found at or near distinct vegetation boundaries, such as the border between savanna-forest; savanna-cropland; savanna-shrubland; settlement-cropland; and forest-shrubland. Although Cekik area had planted species that has been known to be able to provide shelter and food for Bali Starling (so was Brumbun), the bird has not been observed to be presence in the area since the 1990s. These results further confirm the importance of examining habitat patterns of endemic bird within a landscape that are influenced by multiple factors that interact in space and time. Addressing data shortage in habitat patterns within endemic species distribution is important for conservation managers developing conservation management strategies. Evaluating the remaining habitat of the species is important for conservation of Bali starling and useful for the reintroduction and release program to their natural habitat."

"ABSTRAKJalak Bali merupakan satwa endemik Pulau Bali dan masuk kategori hewan yang dilindungi. Penurunan populasi jalak bali disebabkan faktor alih fungsi lahan sehingga sumber makan dan tempat bersarang di Taman Nasional Bali Barat berkurang. Persyaratan hidup jalak bali untuk kesesuaian habitat meliputi variabel wilayah ketinggian, jarak dari sungai, tipe vegetasi, jarak dari permukiman dan jarak dari jalan. Dengan menentukan indeks kesesuaian dibantu dengan metode pembobotan dan analisis overlay akan didapatkan wilayah kesesuaian habitat jalak bali. Wilayah yang paling sesuai memiliki karakteristik dataran rendah, berupa vegetasi hutan musim dan savana, dekat dengan sungai dan jauh dari permukiman dan akses jalan.

---

ABSTRACTBali starling is a species endemic of the Bali Island and in the category of protected animals. Bali starling population declines due to land conversion factor so that the source of food and nesting places in the Bali Barat National Park is reduced. Bali starling life requirements for habitat suitability covering altitude region, distance from the river, vegetation type, distance from settlements and distance from the road variable. By determining the suitability index and aided by the weighting method and overlay analysis will be obtained suitability region of Bali starling?s habitat. The most suitable areas for the Bali starling?s habitat has the characteristics of the lowland areas, such as monsoon forest vegetation and savanna, close to the river and away from settlements and roads access."

"Mitigasi perubahan iklim terkait dengan pengelolaan hutan mangrove telah mendapat perhatian yang signifikan di dunia internasional selama dekade terakhir namun mengalami kesulitan akibat kurangnya data yang dapat diandalkan untuk melakukan kuantifikasi seberapa banyak kandungan karbon yang ada. Hutan mangrove di Provinsi Bali terbagi menjadi 3 jenis habitat yaitu teluk terbuka yang terletak di Taman Nasional Bali Barat, teluk semi tertutup yang berada di Tahura Ngurah Rai dan pulau kecil yang berada di Hutan Lindung Nusa Lembongan. Penelitian ini bertujuan untuk menganalisis hubungan antara kandungan karbon hutan mangrove dengan tipe dan morfologi habitat hutan mangrove yang berbeda. Perhitungan biomassa dilakukan dengan menggunakan rumus alometrik namun persamaan alometrik yang sama dapat menghasilkan akurasi yang berbeda pada lokasi habitat yang berbeda. Perhitungan kandungan karbon hutan mangrove untuk tipe habitat teluk semi tertutup memiliki nilai estimasi tertinggi yaitu 51,35 ton/ha dengan pola hubungan positif sebesar 60%, sedangkan nilai estimasi karbon terendah berada pada habitat teluk terbuka sebesar 26,28 ton/ha dengan pola hubungan positif sebesar 48%. Penelitian ini menunjukkan bahwa setiap tipe habitat hutan mangrove memiliki karakteristiknya sendiri terhadap ekosistem yang hidup di wilayahnya dan hal ini berpengaruh terhadap nilai karbon yang dikandungnya.

---

Climate change mitigation regarding mangrove forest management has received significantly in international attention over the past decade, but it is lack of reliable data to quantify how much carbon stock is available. The mangrove forest in Bali Province is divided into three habitat types such as open bay beach located in West Bali National Park, semi closed bay beach located in Tahura Ngurah Rai and small island beach located in protected forest of Nusa Lembongan. The research aim is to analyze the relationship between carbon stock characteristics of mangrove forest with the different type and morphology of mangrove forest habitat. Biomass calculations was carried out using the allometric formula, however the similar allometric equations can produce different accuracy at different locations. The calculation of mangrove forest carbon stock for semi closed bay beach habitat has the highest estimation value of 51.35 tons/ha with a positive relationship pattern of 60%, in the other hand, the lowest carbon stock value is in open bay beach is 26.28 tons/ha with positive pattern of relation equal to 48%. This study indicates that each type of mangrove forest habitat has it's own charasteristics to the living ecosystem in it's territory and this affects to the carbon value."

"ABSTRAKTelah dilakukan penelitian tentang komposisi dan struktur hutan pamah serta regenerasi pohon di zona inti bagian barat Taman Nasional Bukit Duabelas, Jambi pada bulan Oktober-November 2012. Plot seluas satu hektare diletakkan di tanah datar di punggung bukit. Plot dibagi menjadi 100 petak yang masing-masing berukuran 10x10 m untuk pencacahan pohon. Petak 5x5 m dan 1x1 m disarangkan dalam plot tersebut untuk pencacahan belta dan semai. Hasil penelitian menunjukkan bahwa pohon dengan diameter setinggi dada (DSD) ≥ 10 cm tercatat sebanyak 463 individu, mewakili 91 spesies dan 36 famili, dengan total area dasar (AD) 27,21 m2 dan indeks keanekaragaman shannon-wiener (H’) 4,04. Spesies dominan berdasarkan nilai kepentingan (NK) adalah Archidendron bubalinum dengan NK tertinggi sebesar 13,93%, diikuti Dacryodes sp. 12,32% dan Antidesma neurocarpum sebesar 12,17%. Archidendron bubalinum adalah spesies dengan kerapatan tertinggi (29 pohon/ha) dan frekuensi tertinggi (22). Koompassia malacensis dari famili Caesalpiniaceae memiliki AD tertinggi 2,23 m2 atau 8,18% dari total AD dalam plot. Burseraceae (32,73%) dan Dipterocarpaceae (25,78%) merupakan famili dengan NK tertinggi, sedangkan famili dengan spesies terbanyak tercatat pada famili Euphorbiaceae (7 spesies). Sebanyak 12 spesies (71 individu) masuk dalam kategori redlist IUCN, 2 di antaranya masuk dalam kategori Critically Endangered (Prashorea lucida dan Shorea acuminata), Endangered (Shorea leprosula), Lower Risk (8 spesies), dan vulnerable (1 spesies). Tercatat sebanyak 511 individu pada tingkat semai, yang diwakili oleh 57 spesies dan 32 famili. Pada tingkat belta tercatat 570 individu yang diwakili oleh 87 spesies dan 36 famili. Di antara 10 spesies pohon yang memiliki kerapatan tertinggi, terdapat 6 spesies (Archidendron bubalinum, Dacryodes sp., Antidesma neurocarpum, Ochanostachys sp., Knema laurina, dan Hydnocarpus sp.) memiliki sebaran lengkap. Empat spesies hanya memiliki sebaran anakan di tingkat belta (Koompassia malacensis, Parashorea lucida, Leptonychia caudata, dan Dacryodes rostrata). Sebanyak 65 spesies atau 71,43% dari semua spesies pohon beregenerasi dalam petak penelitian.

---

ABSTRACTStudy on the composition, structure, and regeneration of the lowland forest in the western part of the core zone of the Bukit Duabelas National Park, Jambi, was conducted in October-November 2012. A one-hectare plot was established on a flatland, over a ridge. It was divided into 100 quadrats of 10 x 10 m each for the enumeration of trees. Subplots of 5x5 m and 1x1 m were nested within the 10x10 m quadrats for enumeration of saplings and seedlings. The results showed that as many as 463 trees with a diameter at breast height (DBH) ≥ 10 cm were recorded, representing 91 species and 36 families, with a total basal area (BA) of 27.21 m2 and the Shannon-Wiener diversity index (H ') of 4.04. The prevalent species in the plot was Archidendron bubalinum with highest importance value (IV) of 13.93%, followed by Dacryodes sp. with IV of 12.32% and Antidesma neurocarpum with IV of 12.17%. Archidendron bubalinum was the species with the highest density (29 trees/ha) and highest frequency (22). Koompassia malacensis from Caesalpiniaceae was a species having the highest BA 2.23 m2 or 8.18% of the total BA in the plot. Burseraceae (32.73%) and Dipterocarpaceae (25.78%) were a families with the highest IV, while the families with the highest number of species recorded was Euphorbiaceae (7 species). A total of 12 species (71 individuals) occurring in the plot were listed in the IUCN redlist category, 2 of which were in the category of Critically Endangered (Prashorea lucida and Shorea acuminata), Endangered (Shorea leprosula), Lower Risk (8 species), and vulnerable (1 species). We recorded 511 individuals of tree seedling, representing 57 species and 32 families. At the sapling stage 570 individuals were recorded representing 87 species and 36 families. Out of 10 species of tree with the highest density, 6 species (Archidendron bubalinum, Antidesma neurocarpum, Dacryodes sp., Hydnocarpus sp., Knema laurina, and Ochanostachys sp.) had a good number of saplings and seedlings. Only four species had individuals at sapling stage (Koompassia malacensis, Parashorea lucida, Leptonychia caudata, and Dacryodes rostrata). A total of 65 species or 71.43% of all tree species were regenerating in plot."

"ABSTRAKAnalisis komposisi, struktur, dan regenerasi pohon hutan pamah di zona intibagian timur Taman Nasional Bukit Duabelas, Jambi dilakukan pada bulanOktober hingga November 2012. Pengambilan data dilakukan pada plot seluassatu hektar yang diletakkan di daerah berbukit. Sebanyak 100 petak masingmasingberukuran 10 m x 10 m digunakan untuk memperoleh data tingkat pohon,dan menyarang di dalamnya plot berukuran 5 m x 5 m dan 1 m x 1 m untukpengamatan data tingkat belta dan semai. Tercatat 414 pohon dengan diametersetinggi dada (DSD) ≥ 10 cm, yang mewakili 113 spesies dari 38 keluarga,dengan Luas area dasar (LAD) keseluruhan 25,71 m2 dan indeks keanekaragamanShannon - Wiener sebesar 4,29. Sebanyak 282 individu tercatat mewakili 88spesies dari 34 keluarga pada tingkat belta dan 222 individu yang mewakili 67spesies dari 32 keluarga pada tingkat semai. Spesies yang paling dominanberdasarkan Nilai Kepentingan (NK) pada tingkat pohon adalah Prunus arboreadengan NK sebesar 19,19%. Ficus fistulosa merupakan spesies pohon dengankerapatan tertinggi (24 pohon/ha). Kerapatan tertinggi tingkat semai ditempatioleh Rinorea anguifera (24 pohon/ha) dan kerapatan tertinggi tingkat beltaditempati oleh Ficus fistulosa (15 pohon/ha). Moraceae dengan NK sebesar34,05% merupakan famili terpenting dalam plot penelitian pada tingkat pohon,sementara Violaceae dan Burseraceae dengan masing-masing NK sebesar 28,31%dan 25,67% menjadi famili terpenting pada tingkat semai dan belta. Sebanyak 71spesies atau 62,8% dari total spesies pohon beregenerasi di dalam plot penelitian.Berdasarkan kerapatan pada tingkat semai, belta, dan pohon, spesies-spesies darifamili Euphorbiaceae menunjukkan kemampuan regenerasi yang baik dandiharapkan menjadi famili yang dominan di masa depan pada plot penelitian.Sebanyak 61 spesies terdaftar dalam checklist Sumatra dan salah satunyaendemik, yaitu Baccaurea dulcis. Berdasarkan Redlist IUCN, Shorea leprosulamemiliki status konservasi Endangered, Aquilaria malaccensis memiliki statuskonservasi Vulnerable, dan 12 spesies lain memiliki status konservasi Low Risk.

---

ABSTRACTAnalysis of the composition, structure, and tree regeneration of the lowland forestin the eastern part of the core zone of the Bukit Duabelas National Park, Jambiwas conducted in October and November 2012. The study was carried out on aone-hectare plot laid out on a slope of a lowland hill forest. A total of 100quadrats of 10 m x 10 m each was used to obtain data trees, and plots measuring 5m x 5 m and 1 m x 1 m each were nestled in sapling quadrates to secure data ofsaplings and seedlings. We recorded 414 trees with diameter at breast height(DBH) ≥ 10 cm, representing 113 species of 38 families, with the total basal area(BA) of 25.71 m2 and Shannon--Wiener diversity index of 4,29. A total of 282individuals were recorded representing 88 species of 34 families at the saplingstage and 222 individuals of seedlings representing 67 species of 32 families. Theprevalent species of tree was Prunus arborea with Importance Value (IV) of19.2%. Ficus fistulosa was the tree species with the highest density (24 trees/ha).The highest density of seedlings was Rinorea anguifera (24 trees/ha) and thehighest density of saplings was Ficus fistulosa (15 trees/ha). Moraceae with IV34,05% was dominant in the study site at tree stage, while Violaceae andBurseraceae with each IV 28.31% and 25.67% were dominant at seedlings andsaplings stage. A total of 71 species or 62.8% of all tree species wereregenerating in the plot. Based on the density of seedlings, saplings and trees, thespecies of Euphorbiaceae showed a good regenerating capability and expected tobe the dominant family in the future in the area. A total of 61 species areregistered in the Sumatra checklist and one of them is endemic, which wasBaccaurea dulcis. Following the IUCN redlist we categorized Shorea leprosulaas an endangered species, Aquilaria malaccensis as a vulnerable species, and 12others as species with low risk."

"Latar belakang: Diagnosis dry eye disease (DED) ditegakkan dengan serangkaian pemeriksaan gejala subjektif dam tanda klinis objektif, namun sayangnya alat penunjang pemeriksaan tidak selalu dimiliki oleh fasilitas layanan kesehatan, sehingga kuesioner yang valid dan reliabel berperan sebagai alternatif untuk menegakkan diagnosis. Kuesioner dry eye Indonesia yang telah dikembangkan untuk populasi Indonesia masih belum tervalidasi dengan jumlah pertanyaan yang belum ideal. Tujuan: Mendapatkan item pertanyaan kuesioner dry eye Indonesia bagian diagnosis yang valid dan reliabel serta mengetahui korelasi klinis antara gejala subjektif dan tanda klinis objektif DED pada pasien. Metode: Penelitian ini terdiri dari tiga tahapan, yaitu (1) focus group discussion (FGD) untuk menilai content validity index (CVI), (2) pretesting untuk menilai cognitive debriefing, validitas, dan reliabilitas pada 30 sampel, dan (3) testing untuk menilai validitas, reliabilitas, dan korelasi klinis dengan tanda klinis objektif pada 60 partisipan. Partisipan melengkapi kuesioner dry eye Indonesia dan ocular surface disease index (OSDI), kemudian dilakukan uji tear break up time (TBUT), tear break up pattern (TBUP), pewarnaan okular, dan Schirmer. Hasil: Jumlah pertanyaan kuesioner dry eye Indonesia dari studi sebelumnya adalah 31 item. Dari hasil FGD dikerucutkan menjadi 14 item pertanyaan, dengan nilai CVI 0,98. Pada tahap pretesting, seluruh item dinyatakan dapat dipahami oleh seluruh subjek dengan nilai validitas dan reliabilitas baik. Dari hasil testing, didapatkan validitas yang dinilai dari corrected item total correlation dan reliabilitas yang dinilai dari Cronbach’s alpha yang baik pada 10 item pertanyaan kuesioner. Sensitivitas dan spesifisitas kuesioner didapatkan 91,1% dan 100% dengan AUC 98,2% (IK95% 94,4%-100%), nilai potong diagnosis DED adalah 10,5. Skor kuesioner dry eye Indonesia didapati berkorelasi positif kuat dengan skor OSDI (r=0,808; p<0,001) dan berkorelasi negatif lemah (r=- 0,339; p=0,008) dengan TBUT, namun tidak didapati korelasi yang bermakna terhadap Schirmer dan pewarnaan okular. Kesimpulan: Kuesioner dry eye Indonesia bagian diagnosis memiliki validitas, reliabilitas, serta sensitivitas dan spesifisitas yang sangat baik untuk mendiagnosis DED. Korelasi klinis antara skor kuesioner dry eye Indonesia didapatkan bermakna terhadap skor OSDI dan TBUT.

---

Background: Diagnosis of dry eye disease (DED) is established through a series of examinations of subjective symptoms and objective clinical signs. Unfortunately, diagnostic tools are not always available in healthcare facilities, making valid and reliable questionnaires an alternative for diagnosis. Indonesian dry eye questionnaire developed for the Indonesian population has not yet been validated with an ideal number of questions. Objective: To obtain valid and reliable diagnostic questions for the Indonesian dry eye questionnaire and to determine the clinical correlation between subjective symptoms and objective clinical signs of DED in patients. Methods: This study consists of three stages: (1) focus group discussion (FGD) to assess the content validity index (CVI), (2) pretesting to evaluate cognitive debriefing, validity, and reliability in 30 samples, and (3) testing to assess the validity, reliability, and clinical correlation with objective clinical signs in 60 participants. Participants completed the Indonesian dry eye questionnaire and the Ocular Surface Disease Index (OSDI), followed by testing tear break-up time (TBUT), tear break-up pattern (TBUP), ocular staining, and Schirmer. Results: Thenumber of questions in the Indonesian dry eye questionnaire from the previous study was 31 items, narrowed down to 14 items through FGD with a CVI value of 0.98. In the pretesting stage, all items were found to be understandable by all subjects with good validity and reliability. In the testing phase, 10 questionnaire items showed good validity assessed from corrected item total correlation and reliability assessed from Cronbach’s alpha. The questionnaire demonstrated a sensitivity of 91.1%, specificity of 100%, and an AUC of 98.2% (95% CI 94.4%-100%), with a diagnostic cutoff score for DED at 10.5. The Indonesian dry eye questionnaire score showed a strong positive correlation with OSDI score (r=0.808; p<0.001) and a weak negative correlation (r=- 0.339; p=0.008) with TBUT, but no significant correlation was found with Schirmer and ocular staining. Conclusion: The diagnostic section of the Indonesian dry eye questionnaire has excellent validity, reliability, sensitivity, and specificity for diagnosing DED. Clinical correlations were found between the questionnaire score and OSDI score and TBUT."

"Bayangkan Rp 19 juta habis hanya untuk air "kata Sukiman (34), tokoh warga muda di Dusun deles, Kemalang,Klaten Jawa Tengah. Walaupun kawasan tersebut tampak hijau sejauh mata memandang , tetapi dapat di pahami memang memang bahwa tempat berketinggian rata 1.000 - 1.300 meter di atas permukaan laut itu tidak memiliki air semelimpah di kawasan yang lebih hilir...."

"Hutan mangrove memiliki peran penting dalam mengurangi dampak dari pemanasan global di wilayah perkotaan dan sekitarnya, salah satunya melalui penyerapan karbon. Penyerapan karbon tersebut diperlukan untuk mengurangi gas rumah kaca di atmosfer. Kapasitas penyerapan karbon atau stok karbon hutan mangrove dapat dilihat dari nilai biomassa yang dimilikinya. Penelitian ini bertujuan untuk menganalisis persebaran stok karbon hutan mangrove dan hubungannya dengan kondisi fisik wilayah hutan mangrove. Persebaran stok karbon di daerah studi dianalisis dengan menggunakan kombinasi pendekatan indeks vegetasi dan analisis statistik regresi. Indeks vegetasi yang digunakan yaitu ARVI, SAVI, dan EVI yang diperoleh dari pengolahan citra satelit Sentinel 2-A. Nilai biomassa hutan mangrove didapatkan dari persamaan alometrik. Hasil penelitian menunjukkan bahwa persebaran stok karbon hampir di seluruh wilayah hutan mangrove Teluk Benoa mengalami peningkatan stok karbon tiap tahun. Hubungan perubahan stok karbon dengan kondisi fisik wilayah mangrove cenderung positif. Hal tersebut dibuktikan pada 3 dari 4 parameter fisik wilayah yang memiliki hubungan positif, yaitu suhu, salinitas, dan banyaknya jenis vegetasi.

---

Mangrove forests have an essential role in reducing the impact of global warming in urban and surrounding areas, one of which is through carbon sequestration. Carbon sequestration is needed to reduce greenhouse gases in the atmosphere. The capacity of carbon sequestration or carbon stocks of mangrove forests can be seen from its biomass value. This study aims to analyze the distribution of mangrove forest carbon stock and its relationship with the mangrove forest area's physical condition. The distribution of carbon stocks in the study area was analyzed using a vegetation index approach and statistical regression analysis. The vegetation indices used are ARVI, SAVI, and EVI obtained from processing Sentinel 2-A satellite imagery. The value of mangrove forest biomass is obtained from the allometric equation. The results showed that the distribution of carbon stocks in almost all the mangrove forests of Benoa Bay had increased carbon stocks every year. The relationship between carbon stock changes and mangrove areas' physical condition tends to be positive. The connection is evidenced by three of the four physical parameters of the site that have a positive relationship: temperature, salinity, and vegetation types."