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Dissertations / Theses on the topic 'Seedling traits'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Lammerant, Roel. "Impact of experimental soil moisture manipulation on tropical tree seedling demographic fates and functional traits." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-436103.

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In tropical regions, climate change is predicted to lead to increased drought frequency and intensity. The extent to which this will shift the functional diversity of tropical tree communities is unknown due to a limited understanding about the response of seedlings to variable soil moisture. We addressed this issue using an experimental approach in the Luquillo Experimental Forest, Puerto Rico. We exposed seedlings of eight tree species, representing different successional stages, to an experimental soil moisture gradient. We evaluated (1) How species mean trait values relate to species-speci

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2

Lett, Signe. "Mosses as mediators of climate change : implications for tree seedling establishment in the tundra." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-130942.

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Alpine and arctic tree line expansion depends on the establishment of tree seedlings above the current tree line, which is expected to occur with climate warming. However, tree lines often fail to respond to higher temperatures. Other environmental factors are therefore likely important for tree seedling establishment. Above the tree line, establishing seedlings encounter existing vegetation such as bryophytes, which often dominate in arctic and alpine tundra. Bryophytes modify their environment in various ways and may mediate climate change effects on establishing tree seedlings, and with tha

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3

Salazar-Colqui, Bertha [Verfasser]. "Digital gene expression analysis during seedling development of complex traits in winter oilseed rape (Brassica napus L.) / Bertha Salazar-Colqui." Gießen : Universitätsbibliothek, 2015. http://d-nb.info/107979249X/34.

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4

Kinneen, Lois. "The effects of fragmentation on foliar defensive traits and insect herbivory rates in dipterocarp seedlings." Thesis, Griffith University, 2018. http://hdl.handle.net/10072/385011.

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Human-modified landscapes are ubiquitous and often made up of remnant fragments of natural ecosystems nested within an agricultural or urban matrix. Understanding how species are affected by habitat degradation is a central issue in biodiversity research, yet investigations into the impacts on key ecological interactions have not kept pace. Gaining insight into the responses of ecological processes is vital in order to maximise biodiversity conservation and develop sustainable management practices in a changing world. Herbivory is a fundamental ecosystem process as it mediates the transfer of

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5

Bertoncello, Ricardo. "Restauração ecológica e processos estruturadores de comunidades vegetais." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/41/41134/tde-28092016-102207/.

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Interações interespecíficas são consideradas importantes forças estruturadoras da vegetação. Enquanto a competição aparentemente prevalece em ambientes com menor estresse abiótico, a facilitação tende a aumentar em importância em ambientes de maior estresse. Consequentemente, é esperado que a facilitação desempenhe um papel importante em áreas tropicais degradadas, nas quais as condições abióticas, envolvendo altos níveis de irradiação, temperatura e evapotranspiração, são muito distintas das condições ótimas para a maioria das espécies florestais. Além disso, face à complexidade dos processos

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Berry, Christopher J. J. "Post-dispersal seed predation in a conifer-broadleaf forest remnant : the importance of exotic mammals." Lincoln University, 2006. http://hdl.handle.net/10182/666.

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Despite extensive international acceptance of the critical role of mammalian post-dispersal seed predation in many plant communities, in New Zealand we have limited knowledge of these predators’ influence on plant recruitment in our forests. The principle objective of my thesis was to determine the importance of exotic mammals as post-dispersal seed predators in a New Zealand conifer-broadleaf forest remnant. To address this goal, I used a series of field-based experiments where the actions of different post-dispersal seed predators were separated by wire-mesh exclosures. My study was conduct

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7

Thomas, Dana J. "Morphological Tradeoffs of American Chestnut (Castanea Dentata) and Co-Occurring Hardwoods in Varying Nutrient and Light Regimes." Miami University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=miami1134161439.

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Thomas, Dana Jeanette. "Morphological tradeoffs of American chesnut (Castanea dentata) and co-occurring hardwoods in varying nutrient and light regimes." Connect to this document online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1134161439.

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Thesis (M.S.)--Miami University, Dept. of Botany, 2005.<br>Title from first page of PDF document. Document formatted into pages; contains [1], v, 38 p. : ill. Includes bibliographical references (p. 35-38).

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9

Vidaller, Christel. "Quels facteurs limitent l’installation de Brachypodium retusum : une espèces clé pour la restauration écologique des steppes méditerranéennes ?" Thesis, Avignon, 2018. http://www.theses.fr/2018AVIG0349/document.

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Le brachypode rameux (Brachypodium retusum) est une espèce herbacée pérenne qui domine les pelouses sèches de Méditerranée occidentale. Dans notre zone d’étude du Sud de la France, la recolonisation spontanée est très faible après perturbation du sol. Cette observation ne correspond pas aux résultats d'études menées dans d'autres régions montrant une capacité de colonisation élevée. L'objectif principal de cette thèse était donc de tester les différentes hypothèses pouvant expliquer les différents patrons de colonisation.Dans un premier chapitre, nous avons testé si ces différents patrons de c

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10

Stone, Philippa Mary Rose. "Response of rainforest trees to climate warming along an elevational gradient in the Peruvian Andes." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31560.

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The tropical rainforests of the Peruvian Andes are some of the most biodiverse and most vulnerable to climate warming in the world. The Andes are predicted to experience substantial increases in warming of between +2 °C to +5 °C by the end of the century, in addition to an increases in the frequency of high temperature extremes, drought and flood events. The response of these forests to climate change over the next century has global relevance, due to the high levels of endemic species present and the potential role these areas will play as refugia for lowland species. Despite this, the respon

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Bo, Sann. "Functional Trait Based Community Assembly in a Secondary Tropical Dry Forest (熱帯乾燥地の二次林における機能形質に基づいた群集形成)". 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225668.

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12

Schnaithmann, Florian [Verfasser], Klaus [Akademischer Betreuer] Pillen, and Gunter [Akademischer Betreuer] Backes. "Mapping of quantitative trait loci regulating nitrogen stress tolerance and leaf rust seedling resistance in two selected populations derived from crosses between exotic and elite barley : [kumulative Dissertation] / Florian Schnaithmann ; Klaus Pillen, Gunter Backes." Halle, 2016. http://d-nb.info/1116951517/34.

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13

Lin, Shih-Hung, and 林士弘. "Quantitative trait loci mapping for rice root traits under salinity stress at seedling stage." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/71038137113645207736.

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碩士<br>國立臺灣大學<br>農藝學研究所<br>102<br>Rice is one of the major crops in the world. Because human population grows, increasing rice production is necessary to meet human’s need. Salinity is a common abiotic stress to affect crop production, and rice is one of salt sensitive crops, therefore maintaining rice growth vigor under salt condition is an important issue. Root system is a major physical interaction between plants and soil substrates, it affects nutrients and salt absorption. In this research, we used two populations as study materials, one is recombinant inbred lines population derived fr

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14

Chen, Mei-Ru, and 陳玫如. "Functional traits as predictors for interspecific variability in seedling survival and growth." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/85555850580150325453.

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碩士<br>國立臺灣師範大學<br>生命科學研究所<br>101<br>Plant functional traits are usually defined as morphological and physiological traits of plants that may influence their survival, growth, reproduction and fitness. Identifying key functional traits to predict the survival and growth of plants in a given habitat and provides an effective approach to understand the strategies of resource exploitation. Such understand may serve as a basis to construct community assembly rules. In this study, I applied a trait-based approach to compare the survival and growth of seven shade-tolerant species during their seedlin

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15

Mohamed, Ahmed Mahmoud. "Emergence, seedling vigor, and stand establishment of pearl millet as affected by mesocotyl elongation and other seed and seedling traits." 1985. http://hdl.handle.net/2097/27505.

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16

Mishra, Dipika. "Effect of Exotic Leaf Litter on germination and seedling traits of Pisum sativum." Thesis, 2018. https://publications.azimpremjiuniversity.edu.in/489/1/dipika.pdf.

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Exotic and invasive species have threatened the integrity of many ecosystems in the world. They not only harm the native species diversity but also disturb the biological integrity and functioning of an ecosystem. Although these species cause huge economic and social impacts in most of its non-native ranges, one of the most significant impact includes its allelopathic effect on native vegetationand crop species. In India, several invasive and exotic species have been reported some of which are Parthenium hysterophorous, Lantana camara, Crotalaria pallida, Eucalyptus globulus, Acacia auriculifo

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17

Chen, Kuan-Chuan, and 陳冠全. "QTL mapping for root traits and shoot photosynthesis under salinity stress in rice seedling." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/39258625869248865994.

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碩士<br>國立臺灣大學<br>農藝學研究所<br>104<br>To increase the yield production, the crops may have to grow in the harsh environment. Salinity is one of the major abiotic stresses, and rice is very sensitive to increasing salts. In this study, we evaluated three different root types performance in South East Asia rice varieties, total sixteen loci were detected using genome-wide association mapping (GWAS), and two were found in previous study. In addition, chlorophyll fluorescence was used to measure the leaf photosynthesis rate under salt stress. The pilot experiment showed the effective PSII quantum yield

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18

Russell, John H. "Genetic architecture, genecology and phenotypic plasticity in seed and seedling traits of yellow-cedar : (Chamaecyparis nootkatensis (D.Don) Spach)." Thesis, 1993. http://hdl.handle.net/2429/2565.

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The overall objective of the thesis was to estimate the amount and distribution of genetic and environmental variation, and correlations between genetic variability and seed source origin, of yellow-cedar (Chamaecyparisnootkatensis (D. Don) Spach). Variation was measured for traits of seed, and for morphological and physiological traits of seedlings grown in a common garden, and in differing greenhouse environments. The study focused on traits that sampled the developmental sequence of events that influence a population’s adaptation to its environment. These included growth rate, phenology, dr

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19

PEPE, MARIA. "Functional traits underlying the invasion success of IAS (Invasive Alien Species)." Doctoral thesis, 2022. http://hdl.handle.net/11573/1637716.

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The issue of alien species, especially invasive aliens (IAS), is the current focus of the international scientific debate owing to the negative effects that such species have caused and continue to cause to ecosystems, economic activities and human health. In Italy, there was an increase of 96% of alien species (over 3,000) over the last thirty years. The reason for the widespread diffusion of alien species lies in some features that make them particularly competitive, such as the resistance to pests, the ability to adapt to different environmental conditions, including anthropized habitats, a

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20

Han, Tsung-Han, and 韓宗翰. "Developing A System for Quantifying Root Traits of Rice Seedlings in 3D." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/x5mne5.

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碩士<br>國立臺灣大學<br>生物產業機電工程學研究所<br>105<br>Roots are important organs of plants. Root system architecture (RSA), the spatial configuration of roots, of rice (Oryza sativa L.) has shown a high degree of diversity. RSA needs to be quantified with high accuracy to understand the relationship between RSA and functionality of rice roots. This study developed a three-dimensional (3D) imaging system to quantify the RSA of rice seedling roots of 15 varieties. In this work, rice seedlings were cultivated in glass tubes filled with transparent jelly culture medium for ten days. The two-dimensional (2D) side

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21

Wen, Chen-Hsin, and 温宸欣. "Detection of Quantitative Trait Loci Associated with Rice Seedling Drought Tolerance Phenotypes." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7pda9z.

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碩士<br>國立臺灣大學<br>農藝學研究所<br>107<br>Rice is an important staple food feeding half of the world population. Drought as the major abiotic stress for rice greatly affects the yield production both in upland and lowland fields. In particular, with the increasing frequencies and severity of drought stress, breeding for drought-tolerant rice is necessary nowadays. Root system architecture (RSA) has been considered as a critical component in drought tolerance because of the important role of roots in water uptake from soil. Various traits contribute together to RSA, such as root morphology including roo

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22

Cumbie, William Patrick. "Variation of wood density traits in rooted cuttings and seedlings of loblolly pine." 2002. http://www.lib.ncsu.edu/theses/available/etd-12022002-224559/unrestricted/etd.pdf.

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23

Hsueh, Yi-Ching, and 薜亦晴. "The Genetic Study of Chilling Tolerance-Related Physiological Traits in Rice Seedlings（Oryza sativa L.）." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/53959005619939721119.

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碩士<br>國立臺灣大學<br>農藝學研究所<br>88<br>Low temperature occurs frequently at the rice seedling and leads to chilling injuries. To reveal the genetic control of chilling tolerance-related physiological traits in rice seedlings , a chilling-resistant rice cultivar ( Oryza sativa L., cv. Tainung 67 ) and a chilling-sensitive rive cultivar ( Oryza sativa L., cv. Taichung Native 1 ) were treated with low temperature ( 5℃) for 1 day at both 3-leaf stage and 4-leaf stage. After chilling treatment, the seedlings were transferred to a 30/25℃ greenhouse and rewarming for 5 days. The changes of several physiolog

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24

Lin, Jia-Jun, and 林家駿. "Leaf Life-span and the Related Leaf Traits of Hardwood Seedlings Planted under Cryptomeria japonica Plantation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/53265048831698902793.

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碩士<br>臺灣大學<br>森林環境暨資源學研究所<br>98<br>Leaf life-span (LLS) could be affected by the photosynthetic ability of a plant, light availability and herbivory, and thus regarded as an indicator of a plant’s adaptation to the environment. In this study, I investigated the leaf dynamics and the related physiological traits of 6 hardwood species (Cyclobalanopsis glauca, Cyclobalanopsis stenophylloides, Pasania hancei, Quercus variabilis, Beilschmiedia erythrophloia and Lindera megaphylla) in a Cryptomeria japonica plantation in Chitou district, the Experimental Forest, National Taiwan University, central T

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25

Lenoir, Katherine Judith. "Climate Warming and Drought Effects on Pinus and Juniperus Species: Contrasting Drought Tolerance Traits Limit Function and Growth in Tree Seedlings." Thesis, 2013. http://hdl.handle.net/1969.1/149520.

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Junipers and pines exhibit contrasting patterns of growth decline and mortality with climate change-type warming and drought; yet, the underlying physiological mechanisms are not fully understood. Does warming exacerbate the effects of drought on gas exchange physiology and growth? Do the combined effects of drought and warming differ for pines and junipers? To what extent do isohydric vs. anisohydric responses to water limitation in pines and junipers constrain net leaf CO2 exchange and plant growth response to drought and warming? To address these questions, we compared responses of leaf gas

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