Forest Science and Technology最新文献

{"title":"Characteristics of forest road cut slopes affecting the movement of mammals in South Korea","authors":"Eungjin Jeong, Minjae Cho, Hyun-Jun Cho, Bumjoon Cho, S. Han","doi":"10.1080/21580103.2021.1967789","DOIUrl":"https://doi.org/10.1080/21580103.2021.1967789","url":null,"abstract":"Abstract Existing forest roads that are the base infrastructure foundation for forest management have been built with a focus on structural stability rather than ecological impact. In recent, however, the concerns on the ecological and environmental impacts on the forest road construction has been increased with the emphasis of sustainable forest management and the improvement of public awareness. Especially, the cut slopes that occurred on the forest road construction are known to affect the movement and habitat of wild animals living in the forest. This study aims to establish environmental and structural standards for the cut slopes by identifying the effect of forest road cut slopes on the movement of wild animals based on a survey of national forest roads in South Korea (30 km in total). Seven factors associated with forest road cut slopes, including cut slope length, cut slope gradient, soil type, longitudinal position, crossing position, aspect, and vegetation coverage, as well as wildlife tracks were investigated. As a result of statistical analysis using cross tabulation to determine the correlation of wildlife tracks with each cut slope factor, five factors (soil type, cut slope gradient, cut slope length, vegetation coverage, and crossing position) were significantly identified. Using these five factors, a prediction model to predict whether wildlife move or not on the cut slope was developed, and the discriminant hit ratio was 76.0%. Thus, using such models, there is a need to develop the guidelines of forest road installation considering the wildlife movement and of ecological corridor installation for more eco-friendly forest road construction and design in the future.","PeriodicalId":51802,"journal":{"name":"Forest Science and Technology","volume":"4 1","pages":"155 - 161"},"PeriodicalIF":1.9,"publicationDate":"2021-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87039835","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}

{"title":"Effects of shading and fertilizer treatments on the growth characteristics of Chamaecyparis obtusa (S. et Z.) Endlicher seedlings","authors":"D. Kang, J. Sung, Do-Hyung Lee","doi":"10.1080/21580103.2021.1957722","DOIUrl":"https://doi.org/10.1080/21580103.2021.1957722","url":null,"abstract":"Abstract Chamaecyparis obtusa is increasing the main reforestation species in the warmer southern part of the Republic of Korea because of its resistance to climate warming and economic value for timber. In this study, we investigated the growth response of Chamaecyparis obtusa 2-0 container seedlings to combined artificial shading (full sunlight, 35%, 55%, and 75%) and fertilization (no fertilization, 0.5 g/L, 1.0 g/L 1.5 g/L, 2.0 g/L, 3.0 g/L) treatments. Seedlings treated with 1.0 g/L fertilization and in full sunlight condition showed the highest height growth while seedlings treated with 0.5 g/L fertilization and in full sunlight condition showed the highest growth of root collar diameter. Seedlings treated with 1.0 g/L fertilization and in full sunlight condition showed the highest total dry weight while those treated with 0.5 g/L, 1.0 g/L and 1.5 g/L fertilization and in full sunlight condition and 0.5 g/L fertilization in 35% artificial shading showed the highest Height/Root collar diameter ratio. In addition, seedlings treated with 1.0 g/L fertilization and in full sunlight condition showed the highest seedling quality index. In general, the fertilization treatment effects on seedling growth characteristics were appreciably significantly different across the shading treatment conditions. The magnitude of the differences in the interaction effect of the fertilization treatments is higher in lower than in higher shading treatment conditions. The results suggest that 1.0 g/L seedling fertilization growing in full sunlight condition is the most appropriate nursery treatment level for producing superior quality Chamaecyparis obtusa 2-0 container seedlings. The suggested optimum artificial shading and fertilizer treatments level can be used as preliminary data for producing superior seedlings Chamaecyparis obtusa 2-0 container seedlings capable of achieving sustained reforestation and landscape restoration success in the southern part of the Republic of Korea and similar locations with warming climatic and conditions.","PeriodicalId":51802,"journal":{"name":"Forest Science and Technology","volume":"271 1","pages":"125 - 134"},"PeriodicalIF":1.9,"publicationDate":"2021-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77610374","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}

{"title":"Impact of thinning and pruning on tree growth, stress wave velocity, and pilodyn penetration response of clonal teak (Tectona grandis) plantation","authors":"Gama Widya Seta, Widiyatno  , F. Hidayati, M. Na’iem","doi":"10.1080/21580103.2021.1911865","DOIUrl":"https://doi.org/10.1080/21580103.2021.1911865","url":null,"abstract":"Abstract The objective of this research was to examine the impact of different thinning and pruning intensities on the growth characteristics and wood properties of clonal teak. A 14-year-old clonal teak plantation was used in the study. The first thinning and pruning were established 5 years after planting. Three different levels of thinning (un-thinned, moderate, and heavy) and pruning (low, medium, high) were tested. Growth characteristics, pilodyn penetration, and stress wave velocity were examined. Results showed that different thinning intensities significantly affected the mean annual diameter increment (F = 37.67; p < 0.01). The standing stock estimations of the thinning intensity regimes also significantly differed between different thinning intensities (F = 4.16; p = 0.035). Moreover, pilodyn penetration significantly varied with the thinning treatment (F = 23.53; p < 0.01). The stress wave velocity, however, did not significantly vary with the thinning treatment (F = 2.54; p = 0.11). Meanwhile, the effect of pruning treatment was not observed under all parameters. Heavy thinning treatment promoted all parameters except height and stress wave velocity. A strong positive correlation was observed between pilodyn penetration and DBH. This result suggested that thinning and pruning promoted positive DBH growth and an increase in the economic value of the stand, but it did not affect the wood properties of clonal teak wood.","PeriodicalId":51802,"journal":{"name":"Forest Science and Technology","volume":"327 1","pages":"57 - 66"},"PeriodicalIF":1.9,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79384826","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}

{"title":"Thirty-two years of mangrove forest land cover change in Parita Bay, Panama","authors":"Yoisy Belen Castillo, Kunhyo Kim, H. S. Kim","doi":"10.1080/21580103.2021.1922512","DOIUrl":"https://doi.org/10.1080/21580103.2021.1922512","url":null,"abstract":"Abstract Mangrove forests have experienced a rapid decline. However, the rate of loss has decreased in recent years due to enhanced conservation and nature regeneration. The dynamics of mangrove forests in Panama have not been monitored since the year 2000, despite a significant loss during the 1980s. The objectives of our study were to quantify changes in mangrove cover and identify the dominant drivers of change in Parita Bay, Panama. Temporal changes in mangrove cover and the Normalized Difference Vegetation Index (NDVI) were determined using the supervised classification method on Landsat satellite images from 1987 to 2019. We identified a 4.7% increase in the mangrove area of Parita Bay during the 32 years; the mangrove forests were also considered healthy as reflected by high NDVI values. However, the conversion of mangroves to other land cover types resulted in a 1.26% decline in mangrove cover from 1987 to 1998. Moreover, the area of aquaculture and saltpans almost doubled during this period. During the following two decades, the conversion of other land cover classes (water, other vegetation, and bare soil) increased the mangrove area by 6%, and the annual rate of increase was greater during the second decade (0.43% year−1). From 2009 to 2019, mangroves declined at an annual rate of 0.11% in protected areas and increased at an annual rate of 0.50% in unprotected areas. Despite the regeneration potential of mangrove forests, our study highlights the need to continually manage and protect mangrove forests in order to facilitate their expansion in Parita Bay.","PeriodicalId":51802,"journal":{"name":"Forest Science and Technology","volume":"41 1","pages":"67 - 79"},"PeriodicalIF":1.9,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78125984","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}

{"title":"Toona sureni (blume) merr. Seeds invigoration using 60Co Gamma-Rays irradiation","authors":"M. Zanzíbar, Y. A. Nugraheni, K. P. Putri, N. Yuniarti, D. Sudrajat, Yulianti, D. Syamsuwida, A. Aminah, E. Rustam, A. Sukendro, Diana Septiningrum","doi":"10.1080/21580103.2021.1924872","DOIUrl":"https://doi.org/10.1080/21580103.2021.1924872","url":null,"abstract":"Abstract Deteriorated seeds can be improved by invigoration treatment, including gamma-ray irradiation by Cobalt-60 (60Co). The purpose of this study was to determine the proper dose of gamma-ray irradiation (60Co) to increase the decreased vigor of suren (Toona sureni (Blume) Merr.) seeds. This study uses a factorial completely randomized design (CRD) with aging and irradiation as the treatments. Aging factors consisted of 0, 2, and 4 days. Irradiation factor consisted of 7 levels, namely 0, 5, 10, 20, 40, 80, and 100 Gy, repeated four times. The parameters observed were the electrical conductivity, germination percentage, germination speed, and seedling height. The results showed that Seed aging treatment significantly affected Suren seed germination with 75% (2 days aging) and 56% (4 days aging) germination. The 40 Gy dose of gamma-ray irradiation could increase germination percentage and germination speed of low suren seed vigor increasing 51.42% and 60.21%, respectively. Simultaneously, the cell membrane damage of stored suren increased with gamma-ray irradiation treatment of more than 40 Gy based on electrical conductivity. In seeds with high germination, such as seeds without aging and seed aging for two days with a germination percentage of 80% and 75%, respectively, the invigoration treatment was not effective. Invigoration treatment was effective in increasing the deteriorated or low viability and vigor of the suren seeds.","PeriodicalId":51802,"journal":{"name":"Forest Science and Technology","volume":"64 1","pages":"80 - 87"},"PeriodicalIF":1.9,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85779718","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}

{"title":"Bees algorithm for Forest transportation planning optimization in Malaysia","authors":"J. J., Norizah K., Mohd Hasmadi I., Azfanizam A. S.","doi":"10.1080/21580103.2021.1925597","DOIUrl":"https://doi.org/10.1080/21580103.2021.1925597","url":null,"abstract":"Abstract Algorithm is widely used in various areas due to its ability to solve classes of problems. Due to multiple objectives to be met and varied algorithm application in this digital era, addressing the problem-solving optimization in a more efficient and effective way has become more reasonable. Forest transportation planning is one of the most expensive activities in timber harvesting and can be optimized through algorithm application. Forest transportation planning is a vital component of timber harvesting activities. Inappropriate planning may raise the overall costs of harvesting activities. This paper aims to give an overview of several algorithm application in optimizing the forest transportation planning problem and give an insightful information regarding the relationships between algorithm and the integration of transportation system characteristics and variables. Examples of algorithm that are finding their way to the forest transportation planning problem include Genetic Algorithm (GA), Particle Swarm Optimization (PSO) algorithm, Ant Colony Optimization (ACO) algorithm, Simulated Annealing (SA) algorithm and Tabu Search (TS) algorithm. Although no literature was found regarding forest transportation planning problem optimization with regards to Bees Algorithm (BA), rules set for several transportation problem evidenced from literature search seems to be applicable to forestry. Generally, in this paper, the BA has been given focus for forest transportation planning problem optimization as a potential algorithm to overcome the challenges of environmental degradation and efficiency of timber extraction used, as well as its accuracy and less processing time for problem-solving.","PeriodicalId":51802,"journal":{"name":"Forest Science and Technology","volume":"33 1","pages":"88 - 99"},"PeriodicalIF":1.9,"publicationDate":"2021-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90324486","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}

{"title":"Non-timber forest product utilization under community forest management in northern Thailand","authors":"Siriluck Thammanu, Hee Han, Dokrak Marod, Liangzhen Zang, Yoonkoo Jung, Khaing Soe, Surin Onprom, Joo-sang Chung","doi":"10.1080/21580103.2020.1862712","DOIUrl":"https://doi.org/10.1080/21580103.2020.1862712","url":null,"abstract":"Abstract Forest resources are a salient and critical issue requiring ongoing attention by the Thai government. Community forest management (CFM) is a practice used to, among other things, resolve land use issues and regulate the extraction and use of non-timber forest product (NTFPs). Managing as a community forest can not only enhance the livelihoods of the local people but also improve their socio-economic condition. This research was conducted at the Ban Mae Chiang Rai Lum Community Forest located in Pa Mae Phrik National Forest Reserve in Thailand’s northern province of Lampang. We collected species biodiversity data of the forest’s total area of 3,925 ha using a systematic sampling method, and twenty-five 40 × 40 m (0.16 ha) survey plots were established in the community forest. Interviews of 159 household heads and/or other household representatives were conducted using a designed questionnaire. The questionnaire focused on information regarding the households’ NTFP utilization habits and engagement in CFM processes. A forest survey was conducted which found that there were 197 plant species, 144 genera, and 62 families in the community forest. Of these, 160 plant species were classified as having medicinal uses, 89 were used as food, 37 as extractives, 32 for firewood, and 12 for fibers. This study also revealed that unmonitored over-exploitation of NTFPs may negatively impact forest biodiversity. As surveyed, 68.55% of households depended on NTFPs. The value of the harvested NTFPs was 6.35% of the total community income. A positive correlation between NTFP income and CFM suggests that utilization of NTFPs combined with CFM can create income opportunities and promote participation in CFM. In addition, income earned from NTFPs and participation in CFM were directly related to the socio-economics of identifiable groups in this community. Laborers, merchants, and low-income families utilized NTFPs to a lesser degree. Single people, household heads, those with a bachelor’s degree, and low income families were less likely to participate in CFM while land owners were more likely to do so. This study implies that the harvesting of NTFPs should not go unchecked, especially of species that are threatened or likely to be threatened if over-harvested. Efforts to enhance lower income household utilization, to more equitably distribute the benefits, and to incentivize community involvement should be prioritized as doing so is crucial to maintaining a healthy supply of NTFPs and safeguarding the community forest biodiversity.","PeriodicalId":51802,"journal":{"name":"Forest Science and Technology","volume":"66 1","pages":"1 - 15"},"PeriodicalIF":1.9,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81186058","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}

{"title":"Forest-based livelihood choices and their determinants in Western Kenya","authors":"Purity Yego, R. Mbeche, J. Ateka, E. Majiwa","doi":"10.1080/21580103.2020.1870577","DOIUrl":"https://doi.org/10.1080/21580103.2020.1870577","url":null,"abstract":"Abstract Forest extraction is an important livelihood activity for millions of low-income households in rural areas of developing countries. Understanding the choices households make to extract forest products can help formulate strategies for preventing livelihood strains associated with forest degradation. This article evaluates the nature, extent and determinants of forest extraction among rural households in western Kenya. Data were obtained from a survey of 924 randomly selected households in the Mt. Elgon area in western Kenya. The level of forest extraction was measured as the aggregate value of products extracted, while a Double Hurdle model was applied to assess the factors influencing forest extraction. The results show that the choice to engage in forest-based livelihood was generally higher among households with lower asset value, membership in forest user associations, and headed by males. The results further show that although the majority of households’ engaging in forest-based livelihood were of the lowest wealth category, households in the middle wealth category were found to extract higher value products. Institutional characteristics, including access to agricultural markets, credit, extension, and membership to forest user groups, increased the likelihood of households’ extracting higher value products. Overall, the results show that in addition to asset endowment, other contextual factors, such as access to markets, agricultural extension, and membership to farmer groups defined whether a household extracted forest products for survival or accumulation.","PeriodicalId":51802,"journal":{"name":"Forest Science and Technology","volume":"47 1","pages":"23 - 31"},"PeriodicalIF":1.9,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79142451","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}

{"title":"Short-term effects of tree thinning on microhabitat variables and rodents in Japanese larch Larix kaempferi forest","authors":"Seung-Hun Son, Jae-Kang Lee, Hyun-Su Hwang, Tae-Kyung Eom, Shin‐Jae Rhim","doi":"10.1080/21580103.2021.1880976","DOIUrl":"https://doi.org/10.1080/21580103.2021.1880976","url":null,"abstract":"Abstract We examined the short-term effects of tree thinning on microhabitat factors and the abundances of striped field mice Apodemus agrarius, Korean field mice Apodemus peninsulae, and Korean red-backed voles Myodes regulus within a Japanese larch Larix kaempferi forest in South Korea. Three different stands were thinned to 0%, 25%, or 50%. Ground vegetation was higher in the second year of tree thinning than in the first year. In the first year of thinning, ground vegetation was significantly higher in the control than in the 50% thinned stand, whereas the opposite trend was observed in the second year. Mid-story vegetation was higher in the control than in the 50% thinned stand. In the first year of thinning, the sub-overstory vegetation was higher in the control than in the 50% thinned stand. Basal area was the highest in the control stand. Abundances of the three rodent species were higher in the second year of tree thinning than in the first year. The abundance of A. peninsulae was higher in the control than in the 50% thinned stand. Overall, the three rodent species preferred microhabitats with dense ground vegetation. Our results showed that the short-term effects of tree thinning altered microhabitat factors and disturbed microhabitat conditions in the first year; furthermore, the 50% thinned stand did not provide suitable habitats for A. peninsulae. In this study, moderate (25%) tree thinning resulted in a convenient balance between biodiversity conservation and human demands for forest wood.","PeriodicalId":51802,"journal":{"name":"Forest Science and Technology","volume":"7 1","pages":"39 - 45"},"PeriodicalIF":1.9,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88792942","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}

{"title":"Effects of elevated atmospheric CO2 on rhizosphere microbial community of Pinus densiflora (Korean red pine)","authors":"Hyunseok Lee, Wi-Young Lee, Jun-Won Kang","doi":"10.1080/21580103.2020.1866089","DOIUrl":"https://doi.org/10.1080/21580103.2020.1866089","url":null,"abstract":"Abstract The concentration of atmospheric CO2 is increasing largely owing to human activities. Although it is well established that elevated CO2 (eCO2) stimulates plant growth and primary productivity, the effect of eCO2 on soil microbial communities remains poorly understood. In this study, we aimed to examine the effects of eCO2 on the taxonomical diversity, composition, and structure of rhizosphere microbial communities of Korean red pine (Pinus densiflora) through next-generation sequencing (NGS) of 16S rRNA genes. Three bacterial phyla, Proteobacteria, Acidobacteria, and Actinobacteria, were found to be dominant in all samples. Species richness estimates (Chao1 and ACE) and diversity indices (Shannon and Simpson) for the three sampling chambers were the highest from the eCO2 (approximately 1.4× ambient, ≈ 560 ppm). These findings suggested that elevated atmospheric CO2 affected the bacterial community composition in the rhizosphere of Korean red pine (Pinus densiflora).","PeriodicalId":51802,"journal":{"name":"Forest Science and Technology","volume":"37 1","pages":"16 - 22"},"PeriodicalIF":1.9,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82189362","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}