Rozprawy doktorskie na temat „Exotic plantation”
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余銘儀 i Ming-yee Yu. "Enriching native floristic diversity in exotic tree plantation in HongKong". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39558113.
Pełny tekst źródłaYu, Ming-yee. "Enriching native floristic diversity in exotic tree plantation in Hong Kong". Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B39558113.
Pełny tekst źródłaHung, Tun-hei, i 洪敦熹. "Native plant regeneration in exotic tree plantation in Hong Kong, China". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hdl.handle.net/10722/192778.
Pełny tekst źródłaEivers, Rebecca. "The response of stream ecosystems to riparian buffer width and vegetative composition in exotic plantation forests". Thesis, University of Canterbury. Biological Sciences, 2006. http://hdl.handle.net/10092/1354.
Pełny tekst źródłaZatout, Masoud Moustafa Mohamed. "The roles of exotic and native tree species in preventing desertification and enhancing degraded land restoration in the north east of Libya : reciprocal effects of environmental factors and plantation forestry on each other, assessed by observations on growth and reproductive success of relevant tree species, and environmental factors analysed using multivariate statistics". Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5708.
Pełny tekst źródłaWalbert, Katrin. "Ectomycorrhizal communities associated with a Pinus radiata plantation in the North Island, New Zealand". Lincoln University, 2008. http://hdl.handle.net/10182/658.
Pełny tekst źródłaLee, Elsa. "Colonization of exotic plantations by native plants and mammals in Hong Kong". Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B31194783.
Pełny tekst źródłaLee, Elsa, i 李詠心. "Colonization of exotic plantations by native plants and mammals in Hong Kong". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31194783.
Pełny tekst źródłaZhang, Li, i n/a. "Bacterial Diversity of Australian Exotic Pine Forest Soil and Leaf Litter". Griffith University. School of Biomolecular and Biomedical Science, 2007. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20071128.094745.
Pełny tekst źródłaDeus, Ernesto José Rodrigues Cardoso. "Distribution and natural establishment of Eucalyptus globulus in the Iberian Peninsula: insights into processes affecting plant establishment". Doctoral thesis, ISA, 2019. http://hdl.handle.net/10400.5/21193.
Pełny tekst źródłaEucalypt plantations expanded across many countries and became subject to controversy, particularly about their ecological impacts and invasive potential. The same is true in the Iberian Peninsula (Iberia) regarding Eucalyptus globulus Labill. This thesis is composed by six studies (chapters) tackling poorly explored aspects in these domains, with the following objectives: a) to evaluate potential future dynamics of E. globulus plantations in Iberia according to different climate change scenarios and possible conflicts with high biodiversity areas (Chapter 1); b) to explore the influence of different factors on the natural establishment of E. globulus (Chapters 2-5); c) to perform a review of the literature investigating the natural establishment of eucalypt species (Chapter 6). In Iberia, under both climatic scenarios, the suitable range of E. globulus plantations is expected to shrink and conflicts with high biodiversity areas may aggravate (Chapter 1). A countrywide survey in Portugal to estimate E. globulus recruitment, using Google Street View, showed that recruitment is mostly influenced by climatic variables (annual precipitation and thermal amplitude) and that Google Street View is a cost-efficient alternative to car surveys (Chapter 2). Field surveys in E. globulus plantations in Central Portugal showed abundant recruitment along plantation edges, influenced by local factors such as soil cover and tree age. Wildlings, mostly adult, are spread up to 76 meters from plantations (Chapter 3). A sowing experiment using E. globulus seeds showed that germination and survival was enhanced after harrowing (Chapter 4). A seed predation experiment revealed that E. globulus seeds are highly attractive but they have escaped in many locations (Chapter 5). The literature review retrieved 37 studies, addressing 61 eucalypt species in seven countries. Key factors influencing eucalypt recruitment include fire, propagule pressure and disturbances (Chapter 6)
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Lemma, Bekele. "Impact of exotic tree plantations on carbon and nutrient dynamics in abandoned farmland soils of southwestern Ethiopia /". Uppsala : Department of Forest Soils, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/2006108.pdf.
Pełny tekst źródłaNtshotsho, Phumza. "Carbon sequestration on the subtropical dunes of South Africa a comparison between native regenerating ecosystems and exotic plantations /". Diss., Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-06132006-101405.
Pełny tekst źródłaMauritsson, Karl. "Ecological and Edaphic Correlations of Soil Invertebrate Community Structure in Dry Upland Forests of Eastern Africa". Thesis, Högskolan i Skövde, Institutionen för biovetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-15369.
Pełny tekst źródłaTatsumi, Chikae. "Nitrogen cycling driven by soil microbial communities in exotic black locust plantations and native oak forests in the drylands of East Asia". Kyoto University, 2020. http://hdl.handle.net/2433/253313.
Pełny tekst źródła0048
新制・課程博士
博士(農学)
甲第22477号
農博第2381号
新制||農||1074(附属図書館)
学位論文||R2||N5257(農学部図書室)
京都大学大学院農学研究科森林科学専攻
(主査)准教授 舘野 隆之輔, 教授 北島 薫, 教授 德地 直子
学位規則第4条第1項該当
Santos, Anne Francis Agostini. "Desempenho silvicultural de clones de Eucalyptus em duas regiões do estado de Mato Grosso". Universidade Federal de Mato Grosso, 2015. http://ri.ufmt.br/handle/1/695.
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CAPES
Objetivou-se avaliar o desempenho silvicultural de 18 clones do gênero Eucalyptus em duas condições edafoclimáticas diferenciadas, do estado de Mato Grosso. Os plantios experimentais foram instalados em 2010 no delineamento de blocos ao acaso com quatro repetições. Avaliou-se a altura total, altura dominante, DAP, área transversal média, área basal, e a morfometria de copa dos 18 clones nas duas regiões. Os dados obtidos foram submetidos a análise de variância e, posteriormente, teste de média de Scott-knott a 1% de probabilidade. Comportamento distinto foi encontrado entre os materiais testados nas áreas avaliadas. Os clones que apresentaram características superiores em Sinop foram os S-0102, S-0206 e S-0302em Chapada dos Guimarães foram os S-0410, S-0411, S-0412. O clone S-0402 apresentou características silviculturais superiores nas duas regiões de estudo.
This study aimed to evaluate the silvicultural performance of 18 clones of Eucalyptus in two different soil and wheather conditions, in the state of Mato Grosso.The experimental plantings were installed in 2010, with a randomized block design with four replications. It was evaluated the total height, dominant height, DBH, average cross-sectional area, basal area, and the morphometry canopy of the 18 clones in the two regions. The data obtained were subjected to analysis of variance and, subsequently, to the average test of Scott-Knott 1% probability. Distinct behaviors were found among the materials tested in the evaluated areas. The clones that showed superior characteristics in Sinop were the S-0102, S-0206 and S-0302 and Chapada dos Guimarães were the S-0410, S-0411, S-0412. The S-0402 clone presented sivicultural characteristcs superior in both study areas.
Gezahgne, Alemu. "Diseases of exotic plantation forestry trees in Ethiopia". Thesis, 2003. http://hdl.handle.net/2263/27666.
Pełny tekst źródłaDaud, Daniel Silima, i 達大霓. "Natural regeneration of exotic timber species in Tanzania:a case study at Sao Hill forest plantation". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/94282864125939396258.
Pełny tekst źródła國立中興大學
國際農學碩士學位學程
105
Abstract Exotic plantation forests have high biomass and contribute to significant economic impact of many countries in the World. This is due to the fact that the species have an ability to grow very fast in introduced areas compared to many native species. However, they might also escape from plantations through seeds regeneration and spread into natural habitats. Their expansion outside plantation may have huge negative impacts on biodiversity and ecosystem functioning, and thus has become a major concern for many scientists. The major planted species worldwide are eucalyptus, pines and cypress. This study aimed to investigate the regeneration potential of four exotic planted species (i.e., Eucalyptus grandis, Pinus kesiya, Pinus caribaea and Cypress lustanica) at the Sao Hill forest plantation, Tanzania and try to record any evidence of self-regeneration of the species into its adjacent natural areas. The study proposed that: “if these species can withstand conditions of plantation areas where no prior treatment of soil, watering, or fertilizer applications, may have the potential to have natural regeneration into natural areas upon plantation escape”. The study was done by conducting censuses of all regenerated exotic individuals into both plantation and natural areas. In total, there were 4 districts (with 12 transects). Three line transects were set up at each district. The distance from plantation boundary was 100 m and 200 m in plantation and natural areas, respectively. The study found that the species have self-regenerated and have the potential of becoming invasive. Three species (i.e., Eucalyptus grandis, Pinus kesiya, and Cypress lustanica) were found into both plantations and natural areas, while few individuals of Pinus caribaea were recorded. The results further showed a positive skewness trend of individual recruits towards natural areas. The majority of the individual recruits were found close to the plantation edge. Moreover, results on maximum diameter at breast height (DBH) on individual recruits showed that, individual’s diameter in two species (i.e., Eucalyptus grandis, Pinus kesiya,) increased with distance from plantation boundary and thus indicating severe invasive potential. Thus, having seen the successful natural regeneration of the species, this study urges further studies to identify traits of species related to invasion and composition of native forests. Nevertheless, identifying the details of germination ability and processes associated with seeds dispersal, seedling survival and mortality are crucial. The current results of this study can help plantation managers to easily identify fast spreading species into natural areas and thus, take responsible measures of control.
Huang, Shao-chang, i 黃紹彰. "The effects of Anolis sagrei, an exotic lizard, on arthropod diversity and ecosystem functioning in a betelnut plantation in southern Taiwan". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/67139756721908053946.
Pełny tekst źródła東海大學
生命科學系
95
Abstract (ch1) Predation effects could be achieved by directly reducing prey abundance and by indirectly via altering behavioral patterns of prey. In the past, there was little evidence that ant community structure composition could be affected by vertebrate predations. Researchers tend to consider the interactions between vertebrate predators and ants to be weak. In this study, we examined the impacts of the exotic invasive lizard, Anolis sagrei, on ant community structure by manipulating the density of lizards by enclosures. The natural density of A. sagrei in the field was surveyed and used as the density in the lizard-present subenclosures. Before lizard density was manipulated, there was no difference in ant diversity between subenclosures. After lizard density manipulation the ant diversity in subenclosures with A. sagrei present was significantly different from that of enclosures without, although overall ant abundance did not differ significantly. The ant diversity difference was generated by abundance change of ant species Pheidole fervens due to predation pressure of A. sagrei. A significantly lower P. fervens in subenclosures with A. sagrei present might result from direct predation of lizards, or was generated by foraging site shift of this ant. Results of this study thus demonstrated that the invasion of an exotic vertebrate could significantly alter the community structure of ants via predation. Abstract (ch2) Litter decomposition rate is an important factor affecting nutrient recycling in the detritus ecosystem. Collembola are among the most abundant micro-detritivores in leaf litter and play the key roles in the functioning. Collembola influence the litter decomposition rate directly by feeding on litters and indirectly by consuming the fungi involved in the detritus recycling process. Ground spiders such as the family Lycosidae is the major predator of collembola and some genera of ants also take collembola as major prey resource. In this study, we established enclosures to manipulate the density of an invasive lizard, Anolis sagrei, to determine whether the introduction of this lizard would indirectly affect collembola abundance and diversity by predating their predators such as ants and spiders, and consequently affecting litter decomposition rate. We surveyed the natural density of A. sagrei and used that as the density in lizard-present subenclosures. After the manipulation, the overall ant abundance did not differ between two lizard-present and lizard-removed subenclosures. The abundance of Strumigenys ant, the collembola specialist, was very low, so its impact on collembola could not be assessed. After lizard density manipulation although the abundance of jumping spiders (Salticidae) differed significantly, that of the major spider predator of collembola, the wolf spider (Lycosidae), showed no significant change. Neither abundance nor diversity of collembola differed significantly between two types of subenclosures. Congruent with such results were the litter decomposition rates, which also showed no significant differences. Results of this study showed that although presence of the invasive A. sagrei altered ant community structure, this lizard did not significantly affect major predators of collembola and thus collembola abundance and consequently litter decomposition was not impacted.
Van, Hung Vu. "Gradual transformation of Forest Plantations into Close-to-Nature Forests in NE Vietnam". Doctoral thesis, 2013. http://hdl.handle.net/11858/00-1735-0000-000D-F18C-B.
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