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Now showing items 21-40 of 110

  • Biogeography and speciation of the genus Peperomia Ruiz & Pavón in Eastern Polynesia 

    Bradley, Una (Trinity College (Dublin, Ireland). Department of Botany, 2003)
    There are 17 Peperomia laxa within the remote islands of South-eastern Polynesia, of which 14 are endemic. Expeditions (S. Waldren 1991, S. Waldren & N. Kingston 1997, U. Bradley & N. Kingston 2000) have resulted in the ...
  • Phylogenetic analysis of Papaver L. 

    Carolan, James C. (Trinity College (Dublin, Ireland). Department of Botany, 2004)
    The phylogenetic relationships of Papaver L. were investigated using morphological, molecular and phytochemical characters. Such information is of great utility because Papaver species produce highly valuable secondary ...
  • Risk assessment of genetically modified crops in Ireland : investigations of pollen dispersal from oilseed rape (Brassica napus L.) using molecular and pollen trapping techniques 

    Flannery, Marie-Louise (Trinity College (Dublin, Ireland). Department of Botany, 2004)
    A risk assessment was carried out to help determine the extent of pollen flow from a crop of oilseed rape (OSR, Brassica napus L). The project aimed to develop a better understanding of the potential risks of gene flow ...
  • The origin and evolutionary history of the turlough form of Ranunculus repens 

    Murphy, Susan (Trinity College (Dublin, Ireland). Department of Botany, 2004)
    Turloughs are temporary lakes that occur in karstic limestone areas predominantly in the West of Ireland. They generally flood with groundwater in Autumn and empty through swallow holes in late Spring. This strong ecological ...
  • Conservation biology of Colchicum autumnale L. and Campanula trachelium L. in the Nore Valley, Southeast Ireland 

    Smith, Rhian Jane (Trinity College (Dublin, Ireland). Department of Botany, 2004)
    The conservation of plant biodiversity can only proceed effectively if it is informed by a detailed biological knowledge of the target species and their constituent populations. The overall aim of this study was to assess ...
  • The characterisation of genetic diversity of common ash (Fraxinus excelsior L.) in Ireland and around Europe 

    Harbourne, Maeve (Trinity College (Dublin, Ireland). Department of Botany, 2005)
    Fraxinus excelsior (ash) is a native tree species in Ireland and is economically important for the production of timber that is strong, elastic and light. Having migrated after the last glaciation from mainland Europe, it ...
  • Ground flora communities in Ireland's plantation forests : their diversity, structure and composition 

    French, Laura J. (Trinity College (Dublin, Ireland). Department of Botany, 2005)
    Ireland is committed to the principles of Sustainable Forest Management (SFM). Inherent to these principles is the conservation and appropriate enhancement of biological diversity in the country’s plantation forests. ...
  • Micropropagation of ash (Fraxinus excelsior L.) 

    Abbott, Jane I. E. (Trinity College (Dublin, Ireland). Department of Botany, 2005)
    Ash (Fraxinus excelsior L.) is a native hardwood species in Ireland used as a fast growing tree that is well adapted to agricultural sites. It produces wood valued for its toughness and elasticity. A key objective for Its ...
  • Low temperature and leaf growth in grasses 

    Farrell, Aidan D. (Trinity College (Dublin, Ireland). Department of Botany, 2005)
    The central role of temperature in regulating plant growth was investigated by analysing the temperature sensitivity of various aspects of growth in grass leaves. A study of thermal responses in the C4 grass Miscanthus ...
  • Systematics of Eriocaulaceae in Thailand 

    Prajaksood, Amornrat (Trinity College (Dublin, Ireland). Department of Botany, 2006)
    This thesis aimed to provide a complete account of the family Eriocaulaceae for Thailand, to resolve the identity of unknown Thai taxa in the family and to investigate the relationship between Thai species using morphological, ...
  • Fluxes of carbon and water in Cyperus papyrus L. tropical wetlands 

    Saunders, Matthew (Trinity College (Dublin, Ireland). Department of Botany, 2006)
    Carbon dioxide (CO2 ), water vapour (H2O) and energy fluxes play important roles in the functioning of vegetative ecosystems and also influence the climate of our planet at both the regional and global scale through important ...
  • Soil CO2 fluxes in Irish agricultural systems 

    Kumar Jogi, Suresh (Trinity College (Dublin, Ireland). Department of Botany, 2007)
    Worldwide concern with climate change and its effects on our future environment requires a better understanding and quantification of the processes contributing to it. Studies on the role of soil processes is needed to ...
  • Epiphyte diversity in Irish conifer plantations 

    Coote, Linda (Trinity College (Dublin, Ireland). Department of Botany, 2007)
    Government policy aims to increase the area under forestry in Ireland from its current 10% to 17% by 2030. Baseline information on the biodiversity of these forestry plantations is required if they are to be effectively ...
  • The contribution of nitrous oxide emissions from Irish agriculture to global warming 

    Abdalla, Mohamed F. (Trinity College (Dublin, Ireland). Department of Botany, 2007)
    Results from this thesis concern the calculation of annual fluxes and emission factors of the greenhouse gas nitrous oxide from two agricultural soils in Co. Carlow, Ireland. For a cut and grazed pasture in 2004, the annual ...
  • Grass-evolution and diversification : a phylogenetic approach 

    Bouchenak-Khelladi, Yanis (Trinity College (Dublin, Ireland). Department of Botany, 2007)
    The growth in size of phylogenetic trees, over the last 20 years, has allowed evolutionary biologists to better test hypotheses about the evolutionary history of organisms, and especially those of species rich taxa such ...
  • Quantifying the environmental drivers of tree phenology 

    Caffarra, Amelia (Trinity College (Dublin, Ireland). Department of Botany, 2007)
    The prediction of growth onset is particularly complicated, because this phenophase is the end-point of a series of poorly understood physiological changes that are not directly observable, occurring while the bud is ...
  • Understanding late Holocene woodland dynamics in southwestern and western Ireland through the analysis of sub-fossil insect remains 

    Reilly, Eileen (Trinity College (Dublin, Ireland). Department of Botany, 2008)
    The main aim of this research was to explore the validity of using sub-fossil insect remains as a proxy for reconstructing late Holocene woodland dynamics in southwestern and western Ireland. Three woodlands were examined ...
  • A comparison of climate and vegetation dynamics in central Ireland and NW Spain since the mid-Holocene 

    Stefanini, Bettina S. (Trinity College (Dublin, Ireland). Department of Botany, 2008)
    This research investigates chmate and vegetation dynamics in two Atlantic regions; central Ireland and NW Spain. Atmospheric and oceanic processes influence climate and hence vegetation through forcing factors operating ...
  • The reproductive biology and conservation of rare orchid species in Ireland 

    Duffy, Karl Joseph (Trinity College (Dublin, Ireland). Department of Botany, 2008)
    This thesis investigates the factors that affect the conservation and reproductive biology of rare Irish orchids. Research focused on various aspects of the ecology of six species that occur throughout Ireland. Four ...
  • Spatial and temporal fluxes of plant-nutrients in turlough soils 

    Kimberley, Sarah (Trinity College (Dublin, Ireland). Department of Botany, 2008)
    Turloughs are annually flooding karstic depressions which constitute ecologically important and geographically restricted ground-water dependent ecosystems, identified as priority habitats under the EU Habitats Directive. ...