Eddy Nurtjahya

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• Dr.
• Professor (Associate) at University of Bangka Belitung

Rangkui River has served the locals in Bangka Island as a significant freshwater resource. Unfortunately, it has shown water quality deterioration over the past decades. Various land-uses on the catchment area allegedly have contributed to changing water quality of the river. In the previous investigation in 2017, it was revealed that the highest a...

Land use and activity around the Rangkui Watershed affect water quality, and plankton have been studied to help manage the river's water quality. In the 2017 dry season, six station points representing land use functions from upstream to downstream were studied. Surface water sampling was carried out during the day with three replicates. Pollution...

Background and Aims Indonesia is one of the most biodiverse regions in the world, but only a few metal hyperaccumulator plants have been reported from this vast country. This study aimed to discover rare earth element (REE) hyperaccumulator plants on Bangka Island, an area known to have REE enriched soils associated with tin placer deposits. Metho...

Dragonflies are bioindicator insects that are known to be sensitive to the environment and their existence is influenced by habitat conditions. The potential of dragonflies as a bioindicator for the success of reclamation efforts for former tin mining on Bangka Island needs to be studied. This research aims to record the diversity of dragonflies an...

Tropical forests occupy small coral atolls to the vast Amazon basin. They occur across bioregions with different geological and climatic history. Differences in area and bioregional history shape species immigration, extinction and diversification. How this effects local diversity is unclear. The Indonesian archipelago hosts thousands of tree speci...

Tropical forests occupy small coral atolls to the vast Amazon basin. They occur across bioregions with different geological and climatic history. Differences in area and bioregional history shape species immigration, extinction and diversification. How this effects local diversity is unclear. The Indonesian archipelago hosts thousands of tree speci...

Background: The communities around Jering Menduyung Nature Recreational Park (NRP) have local wisdom for utilizing and managing natural resources. Nature management, which is done and influenced by the implementation of local wisdom, can be studied through ethnoecological studies. This research aimed to record the plant species protected by local w...

Macaranga Thou. (Euphorbiaceae) adalah marga terbesar yang dikenal sebagai perintis pada lahan terganggu akibat pembukaan lahan karena pertambangan, pertanian, dan pemukiman. Tujuan penelitian ini mencatat keragaman dan menganalisis kekerabatan Macaranga di Pulau Bangka serta membandingkannya dengan di kawasan Sundaland. Penelitian dilaksanakan pad...

As a tin producer in Indonesia, Bangka Belitung has abandoned tin mining land containing natural radionuclides, and its use for cultivating horticultural crops has health risks. The aim of the research was to determine the contribution of former tin mining land to natural radionuclide contamination in horticultural products and to assess the radiat...

Utilization of ex-tin mining land as agricultural land is thought to have the potential to contribute heavy metals in agricultural products. The research objective was to obtain data on the metal content of Pb, Cd, and Sn in various vegetable crops such as spinach, cucumber, tomato, cayenne pepper, bitter guard, eggplant, pumpkin, and pepper. In ad...

The Growth of Horticultural Crops on Ex-Tin Mined Soil, Bangka. Growth evaluation of the plant parts consumed from various horticultural species is needed in an effort to determine adaptive economic plant species in ex-tin mined soil. This study aims to determine the growth of crops on ex-tin mined soil and on undisturbed soil in Bangka regency. Th...

Soil-to-plant transfer factors (TFs) are of fundamental importance in measuring the environmental impact due to the presence of radioactivity in soil and agricultural crops. The present study thus to measure soil-to-plant TFs of 226Ra, 232Th, and 40K on horticultural plants cultivated on ex-tin mining land in Bangka Belitung islands. There were 21...

Tin-mined land experiences drought, high light intensity, and temperature which is less supportive of plant growth. The study observed the anatomical responses of grasses leaves. This study aims to measure stomatal density, stomatal index, guard cell length, and guard cell width of three grass species that grow naturally in ex tin-mined land and in...

Lilium longiforum Thunb.is a potential ornamental plant that has been developed in several indusrtry, such as pharmaceutical industry and floriculture industry. Generative propagation of L. longiflorum is difficult and more effective when propagated asexually through tissue culture techniques. This research aimed to analyze callus induction from L....

Tumbuhan berkhasiat obat sudah sejak lama dimanfaatkan oleh masyarakat Etnis Karo, Kecamatan Sinembah Tanjung Muda Hulu sebagai alternatif pencegahan dan penyembuhan penyakit. Penggunaan obat tradisional sebagai alternatif pengobatan lebih banyak dibanding pengobatan secara medis. Penelitian ini bertujuan untuk mengetahui pengetahuan, kepercayaan a...

Bangka Belitung is one of the provinces in Indonesia that is endemic to the disease transmitted exclusively by mosquitoes, such as filariasis, dengue hemorrhagic fever (DHF) and malaria. Limitations of information on risk factors of filariasis and dengue hemorrhagic fever (DHF), mosquito bioecology, and the endemic environment, it has not obtained...

Bangka and Belitung region has under 887 collong consisting of 544 under the island of Bangka, and as many as 343 underneath Belitung Island. It has the potential to become a mosquito breeding location in West Bangka, the highest rate of illness with mosquito vector (malaria, DBD, filariasis) is owned by Jebus District. Allegedly this is related to...

The negative impact of tin mining is that it can decrease the productivity of land functions for plant growth. Efforts to improve the soil that can be offered biologically by obtaining potential microbes such as Azotobacter and Azospirillum bacteria. This study aims to count up the population and to isolate and characterize Azotobacter and Azospiri...

Padang sapu-sapu soil is similar with post-tin mining soil in its white sand texture and poor nutrient. One factor causes the disturbed land in Bangka Belitung islands is tin mining activity. One method to rehabilitate marginal soil is by utilizing the potential nonsymbiotic N2-fixing bacteria, which are able to fertilize the soil and is able to pr...

Mendanau Island and Batu Dinding Island are part of small island groups that have a high diversity and density of mangroves. Based on administratively, Mendanau Island is located in the coastal area of Simpang Pesak District, Belitung Regency, which consist of one large island (Mendanau Island) and 1 small island (Batu Dinding Island). The lack of...

The sand tailings from tin mining activities, which is low productivity, could be improved for plant cultivation by ameliorating with materials which contains mutual microorganisms. The aims of this research were to investigate the influences of arbuscular mychorriza dosages and liquid biofertilizer concentration on the growth of pepper in tin tail...

Aim Palms are an iconic, diverse and often abundant component of tropical ecosystems that provide many ecosystem services. Being monocots, tree palms are evolutionarily, morphologically and physiologically distinct from other trees, and these differences have important consequences for ecosystem services (e.g., carbon sequestration and storage) and...

Pandanus tectorius Parkinson ex Du Roi forma integrifolius S. Agustika, S. Santiago and A.P. Keim is a new forma described from Kelapan Island in the Bangka and Belitung Province, Indonesia. This new forma is identified through the distinctive morphological character of spineless leaf margin. These facts are important to be explained related to the...

Aim: Palms are an iconic, diverse and often abundant component of tropical ecosystems that provide many ecosystem services. Being monocots, tree palms are evolutionarily, morphologically and physiologically distinct from other trees, and these differences have important consequences for ecosystem services (e.g., carbon sequestration and storage) an...

Inonu I, Kusmiadi R, Yuliana A, Nurtjahya E. 2020. The amelioration of post tin mining sand tailing medium with chicken manure for pepper cultivation. Jurnal Lahan Suboptimal: Journal of Suboptimal Lands 9(1): 31-40. Pepper cultivation in tin mining sand tailings requires the amelioration of organic matter to improve soil characteristics. The paper...

Rangkui River flows across Pangkal Pinang City, the capital of Bangka Belitung Province. Land uses vary and can inevitably be pollution hot-spots for this river. This study aimed to investigate the current status of Rangkui River based on bacterial indicators in association with other water quality parameters. The sample collection was completed in...

Apart of the oil palm plantation expansion, the Jering Menduyung Nature Recreational Park has relatively diverse plants. The 3,538 ha park is located at the north west of Bangka Island, Indonesia. The minimum species-area curve was 0.82 ha which is just below Dalil conservation forest that is 1.2 ha, but it is much higher than measurements of sever...

Wiranti D, Nurtjahya E, Dahelmi. 2019. Short Communication: The diversity of butterflies (Superfamily Papilionoidea) as a success indicator of tin-mined land revegetation. Biodiversitas 20: 1923-1928. Some former tin-mining areas in Belitung District have been revegetated. With the increase of vegetation age, the environmental quality changes, and...

Orchids species (Orchidaceae) in Peat Swamp Forest of Belitung Regency. Orchid is one of the plant groups that has high commercial value. The orchid's diversity in Belitung Island, particularly in the peat swamp forest has never been collected before. The purpose of this research is to identify wild orchid species from three locations in Belitung R...

Tin mining activities changed soil characteristics, leaving soils critical. The use of arbuscular mycorrhizal fungi (AMF) is one of rehabilitation efforts towards degraded lands. It is expected to participate in ex tin mining rehabilitation in the Province of Bangka Belitung Islands. The aim of this research is to find out local Bangka AMF potentia...

Mendanau Island and Batu Dinding Island are part of small island groups that have a high diversity and density of mangroves. Based on administratively, Mendanau Island is located in the coastal area of Simpang Pesak District, Belitung Regency, which consist of one large island (Mendanau Island) and 1 small island (Batu Dinding Island). The lack of...

The effect of tin mining activity increased sand fraction, decreased silt and clay fractions, decreased macro and micro nutrients especially phosphate and potassium. Vegetation structure and composition were changed. Consequently biotechnology approach such as the use of arbuscular mycorrhizal fungi for supporting revegetation on tin-mined land was...

A research study was conducted to investigate revegetation of tin-mined land using mixed native tree species on Bangka Island, Indonesia. Natural plant succession on these sites is very slow. Consequently, the objective of this study was to evaluate ten native tree species for their suitability, and develop protocols for the rapid restoration of sa...

The study of palm in the Mendanau Island, Belitung was conducted in March 2017. There were 11 palm genera consisting of 14 species: Areca catechu, Calamus densiflorus, C. erinaceus, C. scipionum, Calamus sp., Caryota mitis, Daemonorops melanochaetes, Eleiodoxa conferta, Metroxylon sagu, Oncosperma tigillarium, Orania sylvicola, Pinanga malaiana, Pl...

Land cover changes is a physical impact which caused by the the existence of human activity that is quite high in parts of the lithosphere of the earth. The change in landscape certainly has a positive correlation with the dynamics of land use in an area, so that regular monitoring needs to be done, because often land use occurs out of control and...

In the last decade, a handful of local tree species were planted on the tin-mined land in Bangka Island to support biodiversity and to meet the economical need of the local people in post tin-mining era. Exotic species have been used predominantly since revegetation was mandatory in Bangka Belitung islands in 1992. Some leaf anatomical and root phy...

Land cover changes is a physical impact which caused by the the existence of human activity that is quite high in parts of the lithosphere of the earth. The change in landscape certainly has a positive correlation with the dynamics of land use in an area, so that regular monitoring needs to be done, because often land use occurs out of control and...

Significance Identifying and explaining regional differences in tropical forest dynamics, structure, diversity, and composition are critical for anticipating region-specific responses to global environmental change. Floristic classifications are of fundamental importance for these efforts. Here we provide a global tropical forest classification tha...

In finding what physiological characteristics can be used to predict ground cover success on mine reclamation sites, 14 herb and grass species were tested. Establishment and early growth was tested on three different soils, ie vermiculate and quartz sand mixture, quarry overburden and coal mine overburden in a greenhouse. The results indicate that...

Tin mining in Bangka Belitung has been exploited for hundred years. The province is the second largest tin producer in the world. Secondary data from studies which took place in all four regencies in Bangka Island were discussed to show the impact of mining activities and its reclamation studies. In order to add plant selection criteria for regevet...

Besides to impact on changing of landscape and biodiversity, tin mined left heavy metal contaminants,and phytoremediation (the use of plants to accumulate heavy metals) is a chosen method. This studymeasures Pb (Lead), Cu (Copper), Zn (Zinc) in soil and dominant terestrial plants in tin mined landand Fe (Iron), Al (Aluminum), As (Arsen) in root and...

Bangka Island is located at the east of Sumatra Island, Indonesia. The island, was well known as white pepper producer in the past, together with Belitung Island is the second largest tin producer in the world. The island has a surface of 11,700 km2 and is mainly lowland below 50 m with some hills at 400 – 700 m. It has type-A climate, with an aver...

Tin mines in the Bangka Belitung Islands have been exploited for about a hundred years. Following the issuance of a 1999 Ministry of Trade and Industry decree that tin is not an export item to be monitored and regulated, the Bangka regent issued a decree giving permission for the people to mine tin in 2001. Consequently, “unconventional mines” (tam...

Aim Large trees (d.b.h. ≥ 70 cm) store large amounts of biomass. Several studies suggest that large trees may be vulnerable to changing climate, potentially leading to declining forest biomass storage. Here we determine the importance of large trees for tropical forest biomass storage and explore which intrinsic (species trait) and extrinsic (envir...

Aim - Large trees (d.b.h. ≥ 70 cm) store large amounts of biomass. Several studies suggest that large trees may be vulnerable to changing climate, potentially leading to declining forest biomass storage. Here we determine the importance of large trees for tropical forest biomass storage and explore which intrinsic (species trait) and extrinsic (env...

Unequal understanding among tin mining stake holders on trade regulation often triggered social confl ict and therefore it was suggested to build political will especially among national, provincial, and regencial/municipal government levels. One important effort to bring out political will is presenting an independent and scientific study on compa...

The marked biogeographic difference between western (Malay Peninsula and Sumatra) and eastern (Borneo) Sundaland is surprising given the long time that these areas have formed a single landmass. A dispersal barrier in the form of a dry savanna corridor during glacial maxima has been proposed to explain this disparity. However, the short duration of...

A quantitative study of floristic composition and vegetation structure was conducted at Bangka Island, Indonesia. Six different vegetation types were chosen, riparian forest, abandoned farmland, and natural regeneration of tin-mined lands of different ages: 0 and barren, 7, 11 and 38 years' old tin-mined land. The seedling composition of the oldest...

Bangka is the largest tin producing island in Indonesia. Sand tin tailing may have 95% sand, C-organics less than 2%, cation exchange capacity less than 1.0, and its soil temperature may reach 45°C. The objective of this research was to study the growth of ten selected local tree species in various planting densities and soil treatments on a barren...

Several indicators used to evaluate revegetation programs are survival, plant growth, root growth, cover, litter production, natural recolonisation, habitat improvement, microbes, insects, and birds. To study the prediction of the potency of Collembola as bioindicator of revegetated tin-mined lands, population densities on revegetated tin-mined lan...