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 53 for “"Bryophytes"”.
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Species richness and metacommunity dynamics in bryophytes
Bryophyte species richness and composition were analysed on limestone boulder habitats across twenty sites in Malta. These boulders acted as standard units for studying the effect of environmental, microtopographical and spatial factors on bryophyte metacommunities. The results indicated that …
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Ultraviolet-absorbing compounds in bryophytes: phylogeny, ecology and biomonitorization
Los briófitos (hepáticas, musgos y antocerotas) han mostrado en general una notable tolerancia a la radiación ultravioleta (UV). Esta tolerancia, probablemente, está basada en la acumulación de compuestos absorbentes de radiación UV (CARUV), ya que los briófitos carecen de mecanismos estructurales …
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The Bryophytes of Roaring River State Park, Barry County, Missouri
A study of the bryophytes of Roaring River State Park, Barry County, Missouri, was made between May, 1978, and July, 1979. An annotated checklist includes collections made during this study, as well as previous collections, and contains 128 taxa representing 33 families, 69 genera and 86 new Barry …
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Epiphytic bryophytes in natural forests and cacao agroforests of Central Sulawesi, Indonesia
Diese Dissertation beinhaltet Studien zu der epiphytischen Moosflora in Primärwäldern und verschiedenartig beschatteten Kakao-Agroforsten in Zentral-Sulawesi, Indonesien. Agroforsten beherbergen eine große Vielfalt an Arten und stellen daher ein wichtiges Instrument zum Erhalt tropischer …
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The Phytosociology of the Bryophytes At La Petite Gemme Prairie, Polk County, Missouri
A study of the phytosociology of bryophytes at La Petite Gemme Prairie, Polk County, Missouri was made between June 1980 and May 1981. A total of nine species was collected from five sample areas. Sample area one had the highest percent available light and lowest percent soil water holding capacity …
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COMPARATIVE ULTRASTRUCTURE OF APICAL CELLS AND DERIVATIVES IN BRYOPHYTES, WITH SPECIAL REFERENCE TO PLASMODESMATA
This study focused on the primary cell wall constituents 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. …
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Using the psba Gene as a Measure in Determining the Phylogenetic Relationship among Bryophytes.
… had long been an issue of concern to biologists. Bryophytes were widely accepted as the first land plants to have emerged during the evolution of land plants (Kenrick 1997, Mishler 1994). But, the phylogeny of the groups within the bryophytes remained debatable. There were currently two popular …
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Ultraviolet radiation and aquatic bryophytes: physiological damage and protection mechanisms under laboratory and field conditions
La degradación de la capa de ozono estratosférico provoca un aumento de radiación ultravioleta-B (UV-B) en la Biosfera, lo que puede afectar a los organismos fotosintéticos. Dado que los briófitos de arroyos de montaña se han estudiado poco en este sentido, el objetivo de esta Tesis era profundizar …
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Combining ecological niche models and dispersal simulations to predict bryophytes dynamic response to climate changes
… sur les futures aires de distribution des bryophytes, particulièrement sensibles aux variations climatiques en raison de leur poïkilohydrie. Nous avons commencé par mesurer expérimentalement les vitesses de sédimentation des spores de bryophytes à l’aide d’une caméra à haute vitesse afin …
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Bryophytes in the hydrological cycle and climate change implications : A case study of La Réunion cloud forest
Bryophytes are able to intercept atmospheric water over the entire surface of their shoot and, once intercepted, this water forms a vital part of the hydrological cycle of their surrounding ecosystems. To investigate the role of bryophytes in the hydrological cycle, our study, conducted in the …
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Climatic specialisation: an explanation for the range size and distribution of bryophytes on a tropical island elevational gradient
… this question using a very specific system: bryophytes on the elevational gradient of Piton des Neiges, Réunion Island. Bryophytes are expected to be specialised to fairly narrow conditions of drought, temperature and insolation, which restrict their geographic range. However, little is known …
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Diversity and biogeography of Madagascan bryophytes with an analysis of taxic and functional diversity along an elevational gradient in Marojejy National Park
… the regional and global context of the bryophytes of Madagascar, an ecologically important but poorly studied group, and the factors affecting epiphytic bryophyte diversity, distribution and assemblage of communities along an elevational gradient in Marojejy National Park, north-eastern …
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Relations among benthic macroinvertebrates and concentrations and distributions of trace elements using water chemistry, streambed sediment, transplanted bryophytes on the Uncompahgre River, Colorado
Includes bibliographical references (pages 100-111).
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Contribution méthodologique à l'évaluation de la qualité des eaux des revières à l'aide des macrophytes aquatiques(spermatophytes et bryophytes) - Application au réseau hydrographique luxembourgeois-
… des Macrophytes aquatiques (Phanérogames et Bryophytes) a été étudiée sur l’ensemble des cours d’eau luxembourgeois. Des prospections macrophytiques ont été réalisées pour 340 stations entre 2000 et 2003. Dans chacune d’entre elles, des paramètres mésologiques ont été mesurés et des analyses …
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Ecological genetics of the moss Physcomitrella patens
… genetics of this species. Although the bryophytes are the second largest group of plants, there is little information regarding the population genetics of bryophytes in general. To address these issues I have conducted the first study into the population genetics of P. patens, where …
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