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All Journal Buletin Kebun Raya BERITA BIOLOGI JURNAL BIOLOGI INDONESIA Biosaintifika: Journal of Biology & Biology Education Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek)
DIDIK WIDYATMOKO
Pusat Konservasi Tumbuhan Kebun Raya Bogor, Lembaga Ilmu Pengetahuan Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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Konservasi Ex Situ Mangifera casturi Kosterm. Berbasis Masyarakat: Studi Kasus di Kabupaten Indragiri Hilir, Provinsi Riau Fakhrozi, Irzal; Hikmat, Agus; Widyatmoko, Didik
JURNAL BIOLOGI INDONESIA Vol 9, No 1 (2013): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (230.162 KB) | DOI: 10.14203/jbi.v9i1.155

Abstract

Mangifera casturi Kosterm. (Anacardiaceae) merupakan spesies yang dinyatakan punah di alam liar. Spesies ini endemikdi pulau Kalimantan. Saat ini, Mangifera casturi telah dibudidayakan di luar sebaran alaminya, terutama diKabupaten Indragiri Hilir Provinsi Riau, Sumatera. Penelitian dilakukan di dua kecamatan di Kabupaten IndragiriHilir, yaitu Kecamatan Gaung Anak Serka (GAS) dan Kecamatan Gaung. Sebanyak 1.315 individu M. casturiditemukan dalam penelitian yang dilakukan. Keberhasilan konservasi ex situ M. casturi di daerah ini didukung olehsetidaknya tiga stimulus: alami, manfaat, dan stimulus religius. Namun faktor internal dan eksternal milik masyarakatsetempat juga mempengaruhi secara signifikan. Di Kecamatan GAS, konservasi ex situ M. casturi terutamadidukung oleh stimulus manfaat sementara di Kecamatan Gaung upaya konservasi ex situ didukung oleh stimulusreligius. Analisa komponen utama dilakukan untuk menentukan kemungkinan hubungan antara konservasi ex situM. casturi dan variabel pendukung dalam masyarakat. Di Kecamatan GAS, yang upaya konservasi ex situ M. casturisecara signifikan didukung oleh ukuran populasi, panen dan pemasaran serta kegiatan pra tanam. Di KecamatanGaung, konservasi ex situ dari M. casturi tidak hanya didukung oleh ukuran populasi, panen dan kegiatan pasar, tetapijuga oleh kegiatan pra tanam, status dan luas lahan.Kata Kunci: Indragiri Hilir, Konservasi ex situ, Mangifera casturi, Punah di alam liar
POLA PENYEBARAN, KELIMPAHAN DAN ASOSIASI BAMBU PADA KOMUNITAS TUMBUHAN DI TAMAN WISATA ALAM GUNUNG BAUNG JAWA TIMUR [Distribution Pattern, Association and Abundance of Bamboo in Plants Community in Mount Baung Natural Tourism Park East Java] Sofiah, Siti; Setiadi, Dede; Widyatmoko, Didik
BERITA BIOLOGI Vol 12, No 2 (2013)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (299.259 KB) | DOI: 10.14203/beritabiologi.v12i2.538

Abstract

One of bamboo forests which are located in a conservation area in Indonesia is Mount Baung Natural Tourism Park, East Java. Bambooforest is a uniqueness/distinctiveness in this area. Study of bamboo ecology in Mount Baung Natural Tourism Park was very important inconservation purposes. The objectives of the research were to assess the distribution pattern, association and abundance of bamboo species at Mount Baung Natural Tourism Park. A systematic quadrat method was used in this study. The distribution pattern of bamboo was calculated using Morisita Index by calculating the Chi-square formula while plant association was calculated using the contingency table. The results indicated that: (1) there were 11 plant species (bearing the Importance Value Index >10%) associated with bamboo, and showing a clumped distribution pattern, (2) bamboo supported the highest importance value, in which Bambusa blumeana was the dominant. The population structure of bamboo in this area showed pre-reproductive phase, indicating the dominance of young stage (D clump < 5m).
INTERSPECIFIC ASSOCIATION PATTERNS AND EDAPHlC FACTORS INFLUENCES: A CASE STUDY OF Orania regalis Zippelius IN WAIGEO ISLAND, WEST PAPUA [Pola Asosiasi Antarspesies dan Pengaruh Faktor Edafik: Studi Kasus Orania regalis Zippelius di Pulau Waigeo, Papua Barat] Widyatmoko, Didik
BERITA BIOLOGI Vol 9, No 5 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1369.039 KB) | DOI: 10.14203/beritabiologi.v9i5.1998

Abstract

Tropical plant community ecology is often assumed to be driven largely by stochastic disturbance, regeneration and demographic processes. The influence and importance of physical and biotic components are rarely taken into account. Consequently, scientific findings in this field are very limited. Tropical soils are in fact more diverse than usually is recognized. This study was conducted to test hypotheses about the importance and influence of edaphic parameters and association patterns in determining the abundance and distribution of the Papuasian palm Orania regalis Zippelius and its co-occurrence with other plant species. The results showed that a number of interrelating edaphic factors, in combination, appeared to explain the abundance and occurrence of O. regalis. This palm showed a preference for wet, but well-drained soils, with high magnesium (Mg ) and calcium (Ca *)contents. The three largest colonies occurred in sites where Mg * content was high. On the other hand, high alkaline concentrations corresponded to the absence of the palm. Eight of 14 tropical plant species were positively associated while six species were negatively associated with O. regalis. For five species (Licuala gramnifolia, Tabernaemontana aurantiaca, Intsia bijuga, Vatica rassak,and Palaquium obovatum), the association with O. regalis was strong, as indicated by their Ochiai indices (>0.5).The palms L. gramnifolia and Sommieria leucophylla appeared to have similar ecological preferences and habitat requirements with O.regalis. The palm tended to occupy sites with lower C/N ratios and all known colonies occurred in habitats with average C/N values of less than 10. Based on the r-squared values, exchangeable Mg* appeared to have more influence on plant density and frequency than on basal area and canopy circle area. The exchangeable Ca * and C/N values showed a similar pattern to Mg contents.However, K ., Na ., Al and H contents did not show significant relationships with the palm abundance parameters. These findings suggest that edaphic variables and plant association patterns are important determinants of the abundance and occurrence of tropical plant species.
KEANEKARAGAMAN DAN POLA SEBARAN SPESIES TUMBUHAN ASING INVASIF DI CAGAR ALAM PULAU SEMPU, JAWA TIMUR Abywijaya, Ilham Kurnia; Hikmat, Agus; Widyatmoko, Didik
JURNAL BIOLOGI INDONESIA Vol 10, No 2 (2014): Jurnal Biologi Indonesia
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v10i2.2103

Abstract

The presence of invasive alien plant species has been known to cause various negative impacts on ecosystems in theinvaded conservation area. This research aims to identify diversity and distribution pattern of invasive alien plantsspecies in Sempu Island Nature Reserve, and to determine the most influential environmental factors to theirdispersion. The methods used were the combination of quantitative vegetation analysis and rapid assessmenttechnique followed by the principal component analysis. As many as 10 invasive alien plants species (belonging to 7families) have been identified within this conservation area, e.g., Pistia stratoites, Ageratum mexicanum, Vernoniacinerea, Cyperus rotundus, Passiflora foetida, Centotheca lappacea, Eleusine indica, Imperata cylindrica, Hedyotiscorymbosa, and Lantana camara. All invasive alien plant species found in the sampling plots had a clumpeddistribution pattern. The most influential environmental factors to the invasive alien plants dispersion were landslope and distance from shoreline.Keywords: distribution pattern, environmental factors, invasive alien plants, Sempu Island Nature Reserve
KAJIAN ARSITEKTUR POHON DALAM UPAYA KONSERVASI AIR DAN TANAH: STUDI KASUS ALTINGIAEXCELSA DAN SCHIMA WALLICHII DI TAMAN NASIONAL G. GEDE PANGRANGO Nuraeni, Eni; Setiadi, Dede; Widyatmoko, Didik
JURNAL BIOLOGI INDONESIA Vol 10, No 1 (2014): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v10i1.325

Abstract

Tree architectural model is basically a tree construction as a result of meristematic growth pattern. Tree architectureis closely associated with water and soil components, i.e. rainfall, throughfall, stem flow, infiltration, surface run-off,and erosion. For Altingia excelsa (Rasamala) plots, the results showed that the daily average of the rainfall intensityobserved was 9.67 mm, stem flow 0.03 mm, canopy throughfall 5.43 mm, infiltration 0.51 ml/mm2/second,surface run-off 3.45 mm, and erosion 5.66 kg/m2. For Schima wallichii (Puspa), the daily average of rainfall was9.67 mm, stem flow 0.04 mm, canopy throughfall 4.02 mm, infiltration 0.49 ml/mm2/second, surface run-off 8.18mm, and erosion 12.71 kg/m2. Compared to A. excelsa, S. wallichii significantly had larger values in someparameters measured, i.e. stem flow, surface run-off, and erosion, indicating that on land sopes of 70% of theMount Gede Pangrango National Park, individual plants of S. wallichii seemed to be well adapted. However,individuals of A. excelsa possessed a more spreadly branching model, larger vertical width, denser canopy, andskewed bark channels capable for slowing down the stem flow and canopy throughfall. Consequently plants of A.excelsa would generally be able to hold and conserve water and soil better than S. wallichii plants.Keywords: Tree architectural model, stem flow, throughfall, surface run-off, infiltration, erosion
PLANT- â DIVERSITY AND COMPOSITION IN MOUNT NOK AND THE WAIFOI FOREST OF THE WAIGEO RAJA AMPAT ISLANDS: WITH SPECIAL REFERENCE TO THE THREATENED SPECIES Widyatmoko, Didik
JURNAL BIOLOGI INDONESIA Vol 6, No 2 (2010): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v6i2.3159

Abstract

ABSTRACTKeragaman â dan Komposisi Tumbuhan di Hutan Gunung Nok dan Waifoi Waigeo KepulauanRaja Ampat: Dengan Perhatian Khusus Pada Species yang Terancam Kepunahan RajaAmpat merupakan kepulauan di Papua Barat yang terdiri atas sekitar 610 pulau; empat diantaranya merupakan pulau besar (Waigeo, Salawati, Batanta, dan Misool). Ekspedisi danstudi ekologi dilakukan di Gunung Nok dan Hutan Waifoi (Pulau Waigeo) pada tahun 2007.Tujuan ekspedisi ini adalah untuk mempelajari komposisi dan keragaman beta (â-diversity)flora Gunung Nok dan Hutan Waifoi yang merupakan area penting di Cagar Alam Pulau WaigeoTimur; mengkaji status populasi dari spesies-spesies endemik atau yang terancam kepunahan;serta mempelajari karakteristik habitat flora endemik atau terancam kepunahan . Survei komposisidan kelimpahan populasi dilakukan dengan menggunakan metode cuplikan sabuk transek(transect belts) dan kuadrat yang disusun secara sistematis bergantian di ke dua sisi sabuktransek di dua lokasi penelitian. Formasi dan keragaman beta vegetasi Gunung Nok diobservasidengan cara menetapkan titik-titik pengamatan berdasarkan perbedaan karakteristik komunitasvegetasi di sepanjang gradien gunung. Identitas spesies dan posisi keberadaannya dalamstrata kanopi dicatat dan diobservasi. Sebanyak 554 records tumbuhan berhasil dikoleksi darilokasi penelitian; lima spesies merupakan tumbuhan endemik Waigeo (Guioa waigeoensis,Alstonia beatricis, Calophyllum parvifolium, Schefflera apiculata, dan Nepenthes danseri)yang semuanya berkategori terancam kepunahan, sedangkan 42 spesies merupakan endemikNew Guinea. Dendrobium dan Bulbophyllum merupakan dua marga anggrek yang palingberagam berdasarkan jumlah spesies yang ditemukan.Kata kunci: Keragaman ?, komposisi tumbuhan, spesies terancam kepunahan, Gunung Nok,Hutan Waifoi, Waigeo
PERTUMBUHAN DAN ALOKASI BIOMASSA PADA TANAMAN ARTEMISIA ANNUA L. Rahman, Wiguna; Widyatmoko, Didik
JURNAL BIOLOGI INDONESIA Vol 11, No 1 (2015): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v11i1.2159

Abstract

Artemisia annua L. is known as one of the plants producing artemisinin, i.e. active compound that is used for anti-malaria theraphy. This plant has potency to be cultivated in Indonesia through seedlings and cuttings. The objective of  this study was to compare growth and biomass allocation of plants from seedlings and cuttings. The experiment was set using  Completely Randomize Design with one factor. The factor is type of plant propagation which cutted plant derived from three different ages of mother plants (1.5, 2, and 2.5 months after planting) and seedlings as control. The result showed that growth and biomass alleviation of the cuttings plants are more rapid than the seedlings. However, the cutting plants were flowering earlier than the seedling. At three months after planted, more than 70% of the cutting plants population have flowered. It is implied that the plants from cutting will loss about 70% of its yield potency than the seedling. On the other hand, there was no significant effects of the ages of mother plants on growth and biomass of the cutted plant (p>0.05). Therefore, seedlings were more effective than cutted plant on A. annua cultivation. Keywords: artemisia annua L., biomass allocation, cuttings, growth, seedlings. 
KOMUNITAS FLORISTIK DAN SUKSESI VEGETASI SETELAH ERUPSI 2010 DI GUNUNG MERAPI JAWA TENGAH Afrianto, Whisnu Febry; Hikmat, Agus; Widyatmoko, Didik
JURNAL BIOLOGI INDONESIA Vol 12, No 2 (2016): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v12i2.2895

Abstract

ABSTRACTSuccession dynamics (as a complex interaction and relationship between environment and species) is a crucial ecological process for managing and restoring habitats and ecosystems. This research was conducted at several locations based on the damage levels occurred due to the 2010 eruption of Mount Merapi: heavily damaged site was chosen at the Cangkringan Resort (consisting of both open and covered areas) and the Kemalang Resort, medium damage site was located at the Dukun Resort, and minor damage/relatively intact site was situated at the Selo Resort. A total of 135 plant species belonging to 64 families were recorded from all locations during the study. The Mount Merapi eruption occurred in 2010 had significantly impacted on the floristic community structure and condition. Canonical Correspondence Analysis (CCA) was used to analyze the relationships between environmental variables and the existing plant species conditions. The results indicated that different abiotic environment conditions (variables) significantly influenced species compositions and conditions. The covered area (?= 0:49; p= 0.002; F= 10:35) and the elevation factor (?= 0:32; p= 0.002; F= 7:08) provided the highest impact on vegetation conditions. Meanwhile, the relationships and correlations between edaphic factors and floristic community conditions varied from site to site.Key words: Abiotic environment, floristic community, succession, Mount Merapi, restoration
POPULASI, KO-OKURENSI DAN PREFERENSI HABITAT ARECA MACROCALYX DI PULAU WAIGEO-PAPUA BARAT Widyatmoko, Didik
JURNAL BIOLOGI INDONESIA Vol 11, No 1 (2015): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v11i1.2160

Abstract

Research on population status, co-occurrence and habitat preference of the New Guinean palm Areca macrocalyx Zippelius ex Blume in hill forests of the Waigeo island (West Papua) was conducted in 2012 at six different habitat types: river bank, hill slope, hill top, intact, disturbed and converted forests. Population sizes varied spatially and were dominated by seedlings (62%) and juveniles (24%), indicating a growing population, in which recruitment and mortality were simultaneously continuous and density dependent. A. macrocalyx seemed to prefer specific habitats where river banks situated in the intact forest being the most suitable habitat. Although this palm still tolerated hill tops, the populations were suppressed and seemed to be sensitive to disturbance and changes in water table. A number of interrelating edaphic factors appeared to influence the abundance of this palm with a preference for well-drained soils with a high magnesium (Mg2+) content. High alkaline concentrations also corresponded to the density of the palm. Based on the association levels calculated using the Ochiai method, four tropical species (i.e. Licuala graminifolia, Tabernaemontana aurantiaca, Orania regalis, and Sommieria leucophylla) were positively associated with A. macrocalyx while ten other species were negatively associated. The palm tended to occupy sites with low-moderate C/N ratios where most sampled populations occurred in habitats with the average C/N values of lower than 10. Based on the r-squared values, exchangeable Mg2+ and Ca2+ appeared to have more influence on plant density and frequency than on canopy and basal area. Mortality was higher among the early growth stages but becoming very low in adult individuals. These findings suggest that edaphic factor is a determinant of the abundance and occurrence of the palm. To conserve the most important remaining populations, it is crucial to protect the most suitable sites and the existing-interconnected biotic factors in the reserve.  Keywords: Areca macrocalyx, population, co-occurrence, habitat preference, Waigeo island 
KAJIAN PEMILIHAN JENIS TUMBUHAN UNTUK RESTORASI HUTAN BERDASARKAN BEBERAPA PARAMETER FOTOSINTESIS Ahmad, Tinia Leyli Shofia; Setiadi, Dede; Widyatmoko, Didik
JURNAL BIOLOGI INDONESIA Vol 9, No 2 (2013): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v9i2.169

Abstract

Forest restoration is a process of ecosystem conditioning (soil, vegetation, and wildlife) in order to achieve similarpatterns and profiles to previous conditions and status before the ecosystem was disturbed, both in terms of speciescomposition and structure, and habitat functions. Restoration is a crucial part to maximize the conservation values ofbiodiversity and ecosystem functions. Eight different native plant species were assessed in this research while the photosyntheticparameters studied included the total chlorophyll content, carbohydrate content, CO2 sequestration capacity,leaf weight, leaf number, leaf area and leaf water content. Spectrophotometer was operated to analyse chlorophyllcontent, the Somogyi-Nelson method was used to calculate carbohydrate content, and leaf area was measuredusing the leaf area meter. The research results using the principal component analysis showed that each type of theplant species used for the restoration (2 years old after planting) had different characteristics in terms of photosyntheticparameters studied. Dacrycarpus imbricatus and Syzygium lineatum both had the highest carbohydrate contentsand the best abilities to absorb CO2. Sloanea sigun, Alstonia scholaris, Manglietia glauca, and Castanopsis argentea hadhigher total chlorophyll contents than others, while Altingia excelsa, M. glauca, A. scholaris, and Schima wallichii hadhigher water contents. A. scholaris, M. glauca, and S. sigun had heavier leaf weights. In contrast, M. glauca possessedthe widest leaves amongst the species observed.Keywords: forest restoration, photosynthetic parameters, native species
Co-Authors Abywijaya, Ilham Kurnia Abywijaya, Ilham Kurnia Afrianto, Whisnu Febry Afrianto, Whisnu Febry Agus Hikmat Dede Setiadi Dodo Dodo, Dodo Eni Nuraeni Irzal Fakhrozi, Irzal Lelono, Arthur A. Lelono, Arthur A. Siti Sofiah Tinia Leyli Shofia Ahmad, Tinia Leyli Shofia Wiguna Rahman Yayan Wahyu Candra Kusuma