Journal of Tropical Forestry and Environment最新文献_第4页

Community and Industry Attitude Towardsusing Invasive Prosopisjulifloraas a Dry Matter Energy Sourcefor Small Scale Industries: A Case Study in Hambantota, Sri Lanka 社区和工业界对入侵植物黄花豆作为小型工业干物质能源的态度——以斯里兰卡汉班托塔为例

Journal of Tropical Forestry and Environment Pub Date : 2018-06-30 DOI: 10.31357/JTFE.V8I1.3484

W. Bandara, K.M.E. Udadini

{"title":"Community and Industry Attitude Towardsusing Invasive Prosopisjulifloraas a Dry Matter Energy Sourcefor Small Scale Industries: A Case Study in Hambantota, Sri Lanka","authors":"W. Bandara, K.M.E. Udadini","doi":"10.31357/JTFE.V8I1.3484","DOIUrl":"https://doi.org/10.31357/JTFE.V8I1.3484","url":null,"abstract":"Bundala is Sri Lanka’s first RAMSAR wetland declared under Ramsar Convention, and it has been declared as a national park in 1993 under Fauna and Flora Protection ordinance.At present, wide spread of P.juliflora in the Bundala National Park area has become a threat to diverse ecosystems, and the park management is removing substantial biomass of P. juliflora each year in an attempt to control this invasive species. As such, investigating the potential to utilize the removed biomass of P.juliflora has become important. This study was conducted with the objective of evaluating community and industry attitude and awareness of using P.juliflora as a dry matter energy source in Hambantota District. Two different questionnaires were used for two groups after pre testing in Ambalantota, Hambantota and Tissamaharama Divisional Secretariat Divisions. According to study findings, subsistence energy needs of community are basically fulfilled by common fuel wood species in the area such as Manilkarahexandra and Drypetessepiara. Community in the area is aware about the fast spread of P. juliflora over native species. Approximately 45% of study respondents represent brick industry and they often use rice husk ovens due to lack of firewood to be found in the area and the high availability of rice husk. Since industry and community prefer P.juliflora as a fuel, responsible agencies should make appropriate arrangements to harvest, process and make available the biomass to partially fulfill the thermal energy requirement in the area.Key words: Prosopisjuliflora, small scale industries, Bundala National Park, dry matter energy source","PeriodicalId":30404,"journal":{"name":"Journal of Tropical Forestry and Environment","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74134115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Assessment of Root Plate Structure in Wind-Thrown Trees of Melia dubia 风投树的根板结构评价

Journal of Tropical Forestry and Environment Pub Date : 2018-06-30 DOI: 10.31357/JTFE.V8I1.3482

A. Arunkumar, S. Chauhan

{"title":"Assessment of Root Plate Structure in Wind-Thrown Trees of Melia dubia","authors":"A. Arunkumar, S. Chauhan","doi":"10.31357/JTFE.V8I1.3482","DOIUrl":"https://doi.org/10.31357/JTFE.V8I1.3482","url":null,"abstract":"Root plays a significant role in tree growth and development and information pertaining to spread of the root and its depth will be useful for establishing plantations. Most of the root studies are generally carried out in trees growing in urban areas in avenues, but limited studies are carried out in plantations. Being an underground part of the tree, there are inherent difficulties in understanding root architecture. Uprooting of trees due to storm or wind damage provides an ideal opportunity to obtain critical understanding about tree roots. Such study has been carried out in an 11 year old storm ravaged Melia dubia plantation in Punjab, India. Field observations such as tree girth, root girth, root plate width and depth was recorded on uprooted trees. A large variability was recorded for all the traits. Root plate width and depth ranged from 1.42 to 5.17 m and 0.75 to 2.50 m, respectively. A strong positive relationship between tree girth and primary root girth, root plate width and depth identified in this study provides base line information which can be used while establishing M. dubia plantations.Keywords: Melia dubia, root plate, root width, root depth, wind-thrown","PeriodicalId":30404,"journal":{"name":"Journal of Tropical Forestry and Environment","volume":"14 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72597332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radioactive and Non-Radioactive Element Analysis of Dorado Gas Discovery of Sri Lanka and Their Influence on Natural Environment 斯里兰卡Dorado天然气发现的放射性和非放射性元素分析及其对自然环境的影响

Journal of Tropical Forestry and Environment Pub Date : 2018-06-30 DOI: 10.31357/JTFE.V8I1.3483

S. Gamage, R. Ratnayake, A.M.A.D.M. Senadhira, D. Weerasinghe, V. A. Waduge

{"title":"Radioactive and Non-Radioactive Element Analysis of Dorado Gas Discovery of Sri Lanka and Their Influence on Natural Environment","authors":"S. Gamage, R. Ratnayake, A.M.A.D.M. Senadhira, D. Weerasinghe, V. A. Waduge","doi":"10.31357/JTFE.V8I1.3483","DOIUrl":"https://doi.org/10.31357/JTFE.V8I1.3483","url":null,"abstract":"Naturally-occurring radionuclides deposited beneath the earth, which are referred to as \"NORM\" and other toxicnon-radioactive elements transported to the earth surface with the oil and gas production. Hence, knowledge of the prevailing background levels of these elements in the subsurface reservoir formations is valuable to all stakeholders, most notably to regulatory authorities of the country. The drill cuttings obtained within depth range 3025m to 3095m of reservoir sand section in the deep water exploratory well (CLPL- Dorado 91 H/1z) drilled in the Mannar Basin offshore Sri Lanka were subjected to high-resolution Gamma-ray spectrometry and X-ray fluorescence (XRF) spectrometry.As test results revealed activity concentration of 40K varies from 0.338 Bq/g to 0.514 Bq/g, 210Pb from 0.007 Bq/g to 0.015 Bq/g, 226Ra from 0.012 Bq/g to 0.0145 Bq/g while 232Th levels are between 0.030 Bq/g to 0.040 Bq/g. According to the XRF testing levels of significantly hazardous non-radioactive elements are considerably lower, except for the level of the Barium. The Pb level varies between the 48 ppm to 22 ppm. The Thorium level varies between 9.6 ppm to 10.1 ppm. Manganese has a range of 5,173ppm to 653ppm.The barium levels are between 118,666 ppm to 24,400 ppm. NORM concentration of the tested section were on the lower side when results matched with the IAEA published data on NORM concentration in oil, gas and there byproducts and therefore there will be low level of NORM contaminations when the Dorado gas discovery proceeds to the production stage. Further there is no harmful public exposure from NORM by disposing these drill cuttings to environment or storing at any site location. But the disposal of the drilling mud and handling of the drilling mud should be conducted with cautious since extremely high Ba levels can potentially cause health problems.Keywords: NORM, drill-cuttings, oil, gas, Sri Lanka, XRF","PeriodicalId":30404,"journal":{"name":"Journal of Tropical Forestry and Environment","volume":"90 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72930532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Data Dissemination in Forestry Sector: Need, Constraints and Trends 林业部门数据传播:需求、制约因素和趋势

Journal of Tropical Forestry and Environment Pub Date : 2018-06-30 DOI: 10.31357/JTFE.V8I1.3478

S. Subasinghe

{"title":"Data Dissemination in Forestry Sector: Need, Constraints and Trends","authors":"S. Subasinghe","doi":"10.31357/JTFE.V8I1.3478","DOIUrl":"https://doi.org/10.31357/JTFE.V8I1.3478","url":null,"abstract":"One of the main constraints involved with research and situation analysis in forestry sector is the lack of re-measured data over a long period of time. Since the forest dynamics and tree growth takes such a long time to provide valuable insight, the data gathered in a short time period is mostly not useful. Further long-term data measured at regular intervals to detect such changes is not feasible without an intervention of a dedicate institute or group of institutes so that they can implement a formal system to collect required data and disseminate in effective manner in a selected platform. Due to the rapid change of technology, data disseminated via printed form become less popular at present. Further, raw data cannot be provided in bulk via those methods. Therefore web-based data dissemination systems, especially web portals became very much popular among the present generations. In addition to the ease of data storage, there are many advantages of having portals such as data upload, data filtering etc. However, if the portals are poorly maintained or if those do not successfully cater the user requirements, the popularity will decline. This paper discusses about the different users of forestry sector data, characteristics of good data dissemination systems, problems faced by the users in data availability and different methods of data dissemination. In addition, advantages and disadvantages of web-based data dissemination systems, especially web portals are also discussed in detail.Keywords: web portal, public access to data, stakeholder coordination, improved communication","PeriodicalId":30404,"journal":{"name":"Journal of Tropical Forestry and Environment","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79818026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bioactivity and Volatile Profiling of Azadirachta indica Leaves for the Management of Maize Weevil, Sitophilus zeamais (Motsch.) Infestations 印楝叶生物活性及挥发性分析对玉米象鼻虫玉米象的防治作用出没的。

Journal of Tropical Forestry and Environment Pub Date : 2018-06-30 DOI: 10.31357/JTFE.V8I1.3479

A. Perera, M. Karunaratne, S. Chinthaka

{"title":"Bioactivity and Volatile Profiling of Azadirachta indica Leaves for the Management of Maize Weevil, Sitophilus zeamais (Motsch.) Infestations","authors":"A. Perera, M. Karunaratne, S. Chinthaka","doi":"10.31357/JTFE.V8I1.3479","DOIUrl":"https://doi.org/10.31357/JTFE.V8I1.3479","url":null,"abstract":"Neem (Azadirachta indica A. juss), is known to possess a wide range of pharmacological properties and is thus commercially exploitable. Apart from its medicinal potential, a considerable progress has been achieved regarding biological potential and chemical composition of the leaves which is an ever-increasing interest to the scientific community. During this study, biological phenomena and secondary metabolite composition of A. indica leaves were examined in the management of Sitophilus zeamais on stored maize. Insecticidal and repellent potential of A. indica leaf powders were evaluated in both contact and fumigant forms. Phytochemical screening of 11 phyto constituents was performed following the standard procedures for n-hexane, dichloromethane, ethyl acetate, methanol and aqueous leaf extracts. Volatile profile of A. indica leaves was characterized by employing headspace-solid-phase micro extraction coupled with gas chromatography-mass spectrometry (HS-SPME/GC-MS). Over 60% weevil repellency was recorded at doses above 23.33%, whereas 100% and 67% contact and fumigation mortalities were observed respectively, 9 days after treatment at the dose of 33.33% and the respected LD50 values were 1.56 g and 4.48 g. Thirty two volatile compounds were identified in three distinct chemical classes (Monoterpenoid, sesquiterpenoid and purine nucleosides). γ-Elemene (24.06%), 3,7 (11)-eudesmadiene (6.83%), caryophyllene (6.40%), and 10s,11s-himachala-3(12),4-diene (6.36%) were the major constituents of neem leaf volatiles, followed by other compounds present in less than 4% which might be responsible for varied biological activities observed. Thus the odour impact of the bioassayguided study clearly implies that A. indica leaves can be harnessed against S. zeamais infestations.Keywords: Azadirachta indica, Sitophilus zeamais, headspace-solid-phase micro-extraction, insecticidal activity, repellency","PeriodicalId":30404,"journal":{"name":"Journal of Tropical Forestry and Environment","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89278243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Diversity and Distribution of Avifauna at the Tropical Montane Cloud Forests of Horton Plains National Park 霍顿平原国家公园热带山地云雾森林鸟类的多样性和分布

Journal of Tropical Forestry and Environment Pub Date : 2018-06-30 DOI: 10.31357/JTFE.V8I1.3481

P. Chandrasiri, W. Dharmarathne, W. Mahaulpatha

{"title":"Diversity and Distribution of Avifauna at the Tropical Montane Cloud Forests of Horton Plains National Park","authors":"P. Chandrasiri, W. Dharmarathne, W. Mahaulpatha","doi":"10.31357/JTFE.V8I1.3481","DOIUrl":"https://doi.org/10.31357/JTFE.V8I1.3481","url":null,"abstract":"Diversity and distribution of avifauna was studied at the tropical montane cloud forests of Horton Plains National Park, situated in the highland plateau of the Nuwara Eliya district from September 2015 to May 2016. Three main habitats were identified; cloud forest habitat, cloud forest die-back habitat and grassland habitat. Nine, 300 m line transects were marked in each of the habitats. Avifauna was recorded on three consecutive days of each month while travelling along these transects. Seventy eight species of birds were recorded during the study period. This included 66 resident species (with 13 endemic species) and 12 migratory species. The maximum value of the Shannon Wiener Index H' of 2.56 was recorded from the cloud forest habitat. In the cloud forest die-back habitat the H' was 2.49 and in the grassland habitat the H' was 2.31.The Jaccard similarity index, between cloud forest and cloud forest die-back was 0.58, and these two habitats had more common species. Cloud forest is the major habitat to be protected, with other habitats, in HPNP. Hence management of the HPNP should plan more actions to improve long term monitoring plans to warrant the protection of threatened species.Keywords: bird diversity and distribution, endemic birds, Horton Plains, tropical montane cloud forest","PeriodicalId":30404,"journal":{"name":"Journal of Tropical Forestry and Environment","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82308399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1