Taiwan Journal of Forest Science最新文献_第10页

Understory light at the fushan experimental forest in Northeastern Taiwan: Watershed and landscape perspectives 台湾东北部福山实验林的林下光照:流域与景观视角

Taiwan Journal of Forest Science Pub Date : 2006-06-01 DOI: 10.7075/TJFS.200606.0131

T. Lin, JY Jung, H. Hsiao, S. Hamburg

{"title":"Understory light at the fushan experimental forest in Northeastern Taiwan: Watershed and landscape perspectives","authors":"T. Lin, JY Jung, H. Hsiao, S. Hamburg","doi":"10.7075/TJFS.200606.0131","DOIUrl":"https://doi.org/10.7075/TJFS.200606.0131","url":null,"abstract":"Understory light regimes have a major impact on seedling growth and patterns of forest regeneration. Many researchers have reported understory light regimes for relatively small areas, and then extrapolated their results to the landscape level with little knowledge of landscape-level heterogeneity. We used hemispherical photography to characterize understory light regimes at both the watershed and landscape scales within the Fushan Experimental Forest in northeastern Taiwan. We established 20 transects, 7 of which were located in Experimental Watershed #1 and the other 13 were scattered across an area of 150 ha at the Fushan Experimental Forest. Understory light was not normally distributed across the Fushan Experimental Forest, with some microsites having yew high light levels due to typhoon-induced canopy damage. Median understory light levels exceeded 15% of the incident sunlight at both the watershed and landscape scales. These light levels are much higher than those reported for many mature tropical and temperate forests in other parts of the world, where understory light levels of ＜5% of incident sunlight are common. Aspect, rather than spatial scale, had the largest impact on undercanopy light. In forests with rough topography, utilizing transects that run from the ridge to the valley is more likely to adequately characterize spatial heterogeneity than plots or a few longer transects.","PeriodicalId":22180,"journal":{"name":"Taiwan Journal of Forest Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83312856","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

Seed Dormancy and Germination in Neolitsea acuminatissima (Lauraceae) 樟科新石器海种子的休眠与萌发

Taiwan Journal of Forest Science Pub Date : 2006-03-01 DOI: 10.7075/TJFS.200603.0125

Shun-Ying Chen, S. Kuo, J. Baskin, C. Baskin, C. Chien

引用次数: 5

Establishing Bamboo Charcoal Quality Evaluation Indicators in Taiwan 台湾竹炭品质评价指标之建立

Taiwan Journal of Forest Science Pub Date : 2005-12-01 DOI: 10.7075/TJFS.200512.0269

Yu-Jen Lin, Jiunn-Cheng Lin, G. Hwang, Ming-Tsung Wei

引用次数: 4

Genetic variation of the endangered Scaevola hainanensis (Goodeniaceae) in the Jiangjun Stream mouth, Taiwan 台湾江军溪口濒危海南剑齿虎的遗传变异

Taiwan Journal of Forest Science Pub Date : 2005-09-01 DOI: 10.7075/TJFS.200509.0193

K. Ho, Shu-Lin Deng, Yiyin Chang, C. Tsai, Ming-Fa Kao, J. Hsiao

{"title":"Genetic variation of the endangered Scaevola hainanensis (Goodeniaceae) in the Jiangjun Stream mouth, Taiwan","authors":"K. Ho, Shu-Lin Deng, Yiyin Chang, C. Tsai, Ming-Fa Kao, J. Hsiao","doi":"10.7075/TJFS.200509.0193","DOIUrl":"https://doi.org/10.7075/TJFS.200509.0193","url":null,"abstract":"Scaevola hainanensis Hance is an endangered plant species in Taiwan. Distribution of this species in Taiwan is restricted to 6 connected ditches, which cover an area smaller than 1 ha at the estuary of Jiangjun Stream, Tainan County, southwestern Taiwan. We examined the genetic variation with inter-simple sequence repeat (ISSR) fingerprints. Fifty samples from 6 ditches were collected. In total, 27 primers were used, and 233 bands were obtained, of which only 6 bands (2.58%) were polymorphic, indicating low levels of genetic variation. The analysis of molecular variance (AMOVA) revealed that 93.85% of the variance component was attributable to the variation among individuals within ditches. Low levels of the genetic differentiation coefficient among ditches, G(subscript ST)=0.172 and Nm=2.4, indicated that the ditches barely hinder gene flow between Scaevola populations. UPGMA cluster analysis and principal coordinate analysis revealed no major groupings among ditches or among plants. If the present habitat is damaged, the species will inevitably be confronted with extirpation from Taiwan. Therefore, we suggest that ex situ conservation should be conducted in order to enlarge the population size.","PeriodicalId":22180,"journal":{"name":"Taiwan Journal of Forest Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83967638","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: 3

Modeling fine dead fuel moisture in Taiwan red pine forests. 台湾红松林细死燃料水分模拟。

Taiwan Journal of Forest Science Pub Date : 2004-03-01 DOI: 10.7075/TJFS.200403.0027

Chau-Chin Lin

引用次数: 7

A preliminary test of a human-caused fire danger prediction model. 人为火灾危险预测模型的初步试验。

Taiwan Journal of Forest Science Pub Date : 2002-12-01 DOI: 10.7075/TJFS.200212.0525

Chau-Chin Lin

引用次数: 4

Effect of Stratification and Drying on the Germination and Storage of Prunus campanulata Seeds 分层和干燥对钟栗种子萌发和贮藏的影响

Taiwan Journal of Forest Science Pub Date : 2002-12-01 DOI: 10.7075/TJFS.200212.0413

C. Chien, Shun-Ying Chen, Jeng-Chuann Yang

{"title":"Effect of Stratification and Drying on the Germination and Storage of Prunus campanulata Seeds","authors":"C. Chien, Shun-Ying Chen, Jeng-Chuann Yang","doi":"10.7075/TJFS.200212.0413","DOIUrl":"https://doi.org/10.7075/TJFS.200212.0413","url":null,"abstract":"Seeds of Prunus campanulata are known for their morphological and physiological dormancy which can be broken by a combination of warm and cold stratification. This treatment is usually applied after storage and before sowing. The goal of this study was to evaluate the effectiveness of dormancy-breaking treatment before storage of Prunus campanulata seeds. Two treatment procedures were proposed. The first one involved warm stratification of freshly collected seeds at 30/20℃ or 25/15℃ for 6 wk, followed by drying to 3 mo is ture contents (4.8-5.3%, 11.6-11.8% and 16.3-17.1%) and storage at -20℃ or 5℃ for 3-12 mo. Stored seeds were mixed with sphagnum and stratified at 5℃ for 8 wk before germination test. The second one involved warm stratification at 30/20℃ for 6 wk followed by cold stratification at 5℃ for 8 wk for dormancy breaking, and then drying to 2 seed moisture contents (5.2 and 16.3%) for storage at -20℃ or 5℃ for 3-12 mo. Stored seeds were tested directly for germination. Evaluation criteria used were the germination percentage and mean germination time (MGT). The result showed that seeds stored at -20℃ or 5℃ for 12 mo maintained 70% germination or above with the 2 treatment procedures. However, the first treatment procedure reduced MGT and enhanced the uniformity of germination. A possible cause for the reduced seed germination percent age during storage is discussed.","PeriodicalId":22180,"journal":{"name":"Taiwan Journal of Forest Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88723978","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: 7

Plant Production of Transgenic Eucalyptus camaldulensis Carrying the Populus tremuloides Cinnamate 4-Hydroxylase Gene 携带金针杨肉桂酸4-羟化酶基因转基因山梨树的植物生产

Taiwan Journal of Forest Science Pub Date : 2001-12-01 DOI: 10.7075/TJFS.200112.0249

Zenn-Zong Chen, Shu-hwa Chang, C. Ho, Yi-Chiann Chen, J. Tsai, V. Chiang

引用次数: 19

No Clinal Variation in Cunninghamia lanceolata Wood Density Sampled from Thirteen Chinese Provinces 中国13个省杉木木材密度无临床差异

Taiwan Journal of Forest Science Pub Date : 2001-06-01 DOI: 10.7075/TJFS.200106.0065

Jenq-chuan Yang, C. Chiu, Tsan-piao Lin, F. Kung

引用次数: 1

The Development, Systems, and Evaluation of Forest Fire Danger Rating: A Review 森林火险等级的发展、体系与评价综述

Taiwan Journal of Forest Science Pub Date : 2000-12-01 DOI: 10.7075/TJFS.200012.0507

Lin ChauChin

{"title":"The Development, Systems, and Evaluation of Forest Fire Danger Rating: A Review","authors":"Lin ChauChin","doi":"10.7075/TJFS.200012.0507","DOIUrl":"https://doi.org/10.7075/TJFS.200012.0507","url":null,"abstract":"The present paper reviews several topics on fire danger research in the world. First, sources of fire danger that consist of research in fire hazard and fire risk are reviewed, Second, studies in the development of fire danger rating, including history of different countries, approaches of devising fire danger rating, and fire danger modeling are described. Third, fire danger rating systems that are currently used around the world are compared. Fourth, studies in evaluation of the fire danger rating systems are analyzed. From the literature, it is known that research in forest fire danger rating systems commenced in the 1930s in North America. It is a complex task that requires integrating knowledge from biological, climatic, physical, and behavioral fields. There are various approaches to developing fire danger rating, such as the statistical approach, biophysical approach, social survey and observation, and GIS. Through decades of efforts, laboratory experiments have led to the development of various fire danger rating models based on physical principles or other factors. Based on these theoretical models, various fire danger rating systems have been established to provide guide-lines for various fire management needs.","PeriodicalId":22180,"journal":{"name":"Taiwan Journal of Forest Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84674488","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: 11