Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 46 for “"mosses"”.
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Phylogeographic patterns in three South African forest mosses
Lepfodon smithii (Leptodontaceae) and Pterogonium gracile (Leucodontaceae) are widespread and disjunctly distributed moss species, that in South Africa are confined to forest patches believed to be relics of vast forests that existed before the Pleistocene glaciation period. These two species …
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Evolution of stomata in mosses (Bryophyta): From molecules to form and function
… one of the first land plant groups to diversify, mosses are central in understanding the origin, diversification, and early function of stomata. Unlike tracheophytes that have stomata on anatomically complex leaves and stems, mosses bear stomata exclusively on spore-bearing organs (capsules). …
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Phylogeography and population genetics of two forest endemic mosses in the Cape Floristic Region
Different histories for forests in Southern Africa have been hypothesized from vegetation biogeography and pollen analysis. However, the history of forests is still controversial. Phylogeography uses gene genealogies to infer history of distributions. Two forest endemic moss species were sampled: …
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Evolution of the Neckeraceae (Bryopsida)
The group of pleurocarpous mosses comprises approximately 5000 species, which corresponds to about half of all mosses. The pleurocarpous mosses (i.e. “the Core Pleurocarps”) form a monophylum, which consists typically of perennial mosses with creeping stems and abundant lateral branches. In …
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The effects of rehabilitation management on the vegetation of Fenn’s, Whixall and Bettisfield Mosses National Nature Reserve – a cut-over lowland raised mire
The relationship between vegetation change and rehabilitation management is investigated at a severely degraded cut-over lowland raised mire on the Wales/England border, managed by Natural England and The Countryside Council for Wales. Positive responses are confirmed 11 years after rehabilitation …
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Ground Layer Response to Disturbance in the Pine-Dominated Eastern Foothill Region of West-Central Alberta, Canada
… This dynamic ground layer is a mosaic of feather mosses and reindeer lichens in a system driven by disturbance. In this project, anthropogenic was used to control canopy cover change and study its effects on the ground layer. Timber companies selectively mechanically thinned sections producing …
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Reconstructing South African Afromontane forest history with bryophyte phylogeography
… a phylogeographical study of forest-faithful mosses could provide insight into the fragmentation of forests. In this study, patterns of genetic variation in four forest-faithful mosses (Leptodon smithii, Pyrrhobryum spiniforme, Aerobryopsis capensis and Neckera valentiniana) were investigated.
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The bryophyte flora of Bridal Veil Falls, British Columbia : an analysis of its composition and diversity
… are determinant of its composition. A key to the mosses is provided. Field work conducted between 1991 and 1992 and examination of herbarium specimens revealed a diverse bryoflora in comparison to areas of similar size in British Columbia's Lower Mainland. This bryoflora is composed of 210 species …
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Effects of soil temperature on Sphagnum moss litter quality and decomposition in a subarctic environment
… to the slow decomposition rate of Sphagnum mosses that facilitates carbon sequestration through the build-up of peat. As climate change is predicted to increase soil temperatures and decomposition rates of organic matter, studying environmental and intraspecific mechanisms that controls …
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Phylogenetic relationships of the Genus Andreaea Hedw.(Andreaeceae,Bryophyta) as inferred from RPS4 and TRNL-F sequences and morphology
… sporophyte features that resemble liverworts or mosses and some gametophyte features resembling only the mosses, whereas other features are unique. This thesis presents the first phylogenetic study of the genus, based on both morphological and molecular evidence. Gametophyte and sporophyte …
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Revision of the Genus Homaliodendron (Neckeraceae) of Southeast Asia
Homaliodendron (Neckeraceae) is a genus of mosses widely distributed in the tropics and subtropics. Three species [(H. flabellatum (Sm.) Fleisch. H. papillosum Broth. and H. scalpellifolium (Mitt.) Fleisch.)] are recognized for Southeast Asia and adjacent regions. Fifteen species and three …
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The Evolutionary History of the Antarctic Flora
… moss species, including: four Polytrichaceae mosses, characterised by having bipolar distributions, the most common (~45% of species) distribution pattern amongst Antarctic mosses; the globally widespread moss Ceratodon purpureus; the bank-forming moss Chorisodontium aciphyllum, also known for …
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COMPARATIVE ULTRASTRUCTURE OF APICAL CELLS AND DERIVATIVES IN BRYOPHYTES, WITH SPECIAL REFERENCE TO PLASMODESMATA
… and plasmodesmata (PD) density in three mosses and four liverwort apical cells (AC) and immediate derivatives. The three mosses have tetrahedral apical cells and the liverworts possess tetrahedral, hemidiscoid and lenticular AC geometries. The primary cell wall in the studied taxa is …
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EFFECTS OF NITROGEN DEPOSITION ON BOREAL BOGS: A THREE YEAR NITROGEN FERTILIZATION AND TRACER EXPERIMENT
… Alberta, Canada. Linear growth of Sphagnum mosses was highly variable. However, both capitulum and stem weight showed increase in weight with N addition, resulting in significant increase of capitulum and stem bulk density with N deposition. Total annual primary production, with both …
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Aspectos morfológicos e ultraestruturais de três ciliados de musgos da localidade de Corrêas, Petrópolis, Rio de Janeiro
… collection and hydration in laboratory of two mosses, Sematophyllum subsimplex and Barbula sp. , found in Corrêas (Petrópolis, Rio de Janeiro, Brazil). Observations of life organisms, as well as of preparations for light rnicroscopy (Bodian's Protargol and Feulgen's Nuclear Reaction), standard …
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Bryophyte and macrolichen diversity of the Purdiaea nutans forest in southern Ecuador and its relationship to soil, climate and vegetation structure
… forests is mostly due to high species numbers of mosses and Macrolichens; liverworts are relatively more pronounced in our study sites. The extremely high precipitation of the area favours liverworts and strong winds constrain the growth of projecting or hanging species such as Meteoriaceae and …
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From Genes to Traits and Ecosystems: Evolutionary Ecology of <i>Sphagnum</i> (Peat Moss)
… one-third of Earth’s terrestrial carbon. Peat mosses are ecosystem engineers and create the peatlands that they inhabit through the accumulation of peat, or partially decayed biomass, and the functional traits underlying this extended phenotype. Interspecific functional trait variation is …
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