Dissertations / Theses on the topic 'Bryophytes'
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Loo, Min Jet. "Bryophytes conservation in Sabah." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3422582.
Full textKinabalu National Park (KNP) ha lo status di riserva forestale classe VI: giungla, foresta vergine in Malesia. Nel 2000, inoltre è stato riconosciuto dall'UNESCO per i suoi "valori universali" in circolazione. Con una dimensione di un'area di 754 km ² e la cima più alta a 4,095.2 metri, fornisce un habitat per la flora diversed ecologicamente importanti e fauna. Così, dalla foresta dipterocarp (pianura) al sub-alpino forestale (altopiano), ogni tipo di foresta offre diversi vantaggi a noi. Ecologicamente parlando, foreste montane (1200 - 2700) è essenziale in primo luogo come bacino idrografico, però, questo ecosistema essendo spesso dimenticata a causa dei suoi "valori bassi economici" percepiti dalla gente comune. Infatti, il suo valore economico è alto ma dal momento che meno gente conoscere i suoi servizi ecosistemici gratuiti, è ingiustamente assunto come meno importante rispetto ad altro tipo di foresta, come la foresta di mangrovie. In aggiunta a ciò, le comunità dominanti all'interno della foresta di montagna sono briofite o in termini laici di come muschi. In poche parole, il componente funzionamento della foresta umida e nebbiosa è la foresta di muschio. Come riferimento alla bryodiversity in KNP, ci sono circa 8000 specie di briofite checklisted nella regione Malese.
Gabriel, Rosalina Maria de Almeida. "Ecophysiology of Azorean forest bryophytes." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326158.
Full textLönnell, Niklas. "Dispersal of bryophytes across landscapes." Doctoral thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-100064.
Full textAt the time of the doctoral defence the following papesr were unpublished and had a status as follows: Paper 2: Epubl ahead of print; Paper 3: Manuscript; Paper 4: Manuscript
Zhang, Li. "Diversity and conservation of Hong Kong bryophytes." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk:8888/cgi-bin/hkuto%5Ftoc%5Fpdf?B23316731.
Full textZhang, Li, and 張力. "Diversity and conservation of Hong Kong bryophytes." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B30138103.
Full textSmith, Elizabeth. "Carbon accumulating mechanisms in lichens and bryophytes." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282765.
Full textGuêné-Nanchen, Mélina. "Régénération des bryophytes dans les tourbières perturbées." Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/33616.
Full textThe ecological restoration of peatland is defined as all the processes permitting the regeneration of a peatland that has been degraded, damaged or destroyed. The landscape settings and types of peatlands that require restoration actions is very diverse. The study of natural regeneration of disturbed ecosystems has frequently been used to develop restoration methods that are adapted to specific types of ecosystems. A comprehensive assessment of regeneration trajectories and the environmental and dispersal constraints, as well as the interspecific interactions is directly related to the development of restoration methods and the improvement of our knowledge on the response of species and communities to environmental changes. This thesis studies the regeneration of vegetation, especially of bryophytes, and the factors influencing their regeneration in three problematic cases of restoring disturbed peatland. Firstly, the regeneration of bryophyte communities was studied against a range of environmental conditions in 28 minerotrophic peatlands in the Northwest Territories and Alberta that had burned one, two or five years ago. A shift of dominance between pioneer (mean cover from 16 to 11 %) and late successional bryophytes (from 3 to 27 %) was observed between the second and fifth year after the fire. Bryophyte distribution and abundance were controlled by the species difference in terms of regeneration capacity related to their life history strategy, habitat niche, and the variable effect of the burned biomass. The integration of the ecological niche concept for late successional bryophytes and the use of species with a high potential of regeneration (such as Aulacomnium palustre and Ptychostomum pseudotriquetrum) should be considered during the elaboration of restoration plans of minerotrophic peatlands. Secondly, the regeneration of Sphagnum mosses was studied in 25 donor sites (peatlands where surface vegetation was harvested to supply reintroduction material) on a chronosequence of 17 years according to environmental conditions and harvesting practices. It takes on average 10 years for Sphagnum mosses in donor sites to recover, though minor differences in the species composition and abundance was observed between donor sites and natural peatlands. Pioneer species (e.g., Eriophorum vaginatum), competitive species (e.g., Sphagnum rubellum) and preferential species of wet microhabitats (e.g., Chamaedaphne calyculata) were more abundant in donor sites. Harvesting practices had the greatest effect on the regeneration of donor sites, suggesting that it is possible to speed up Sphagnum regeneration by choosing appropriate management practices. Best practices would be avoiding very wet donor sites and harvesting in the midsummer should be avoided when mosses are at their lowest regeneration potential and when the risk of machinery sinking is high. Thirdly, the regeneration and development of the Sphagnum carpets were studied in two experiments conducted in two types of restored peatlands colonized by pioneer graminoid plants (Cyperaceae). In the first experiment, Carex aquatilis dominated a moderately rich restored fen and formed dense communities with a lot of litter. In the second experiment, Eriophorum angustifolium was dominant with a low cover of litter in a restored cutover Sphagnum-dominated bog where the graminoid plant cover was controlled by repeated mowing. It was demonstrated that the effect of graminoid plants on the Sphagnum carpet was determined by the litter rather than by the structure of the plant itself. Because of the shade created by the dense litter, the presence of a community of a graminoid plant that accumulates a lot of litter such as Carex aquatilis is not beneficial for the formation of productive Sphagnum carpets. The decision to control graminoid plants to enhance the growth of Sphagnum carpets should consider the cover of the plant (not necessary when mean cover < 30 %), but also its life form (less necessary when the plant grows in unique stem), its litter accumulation and potential for invasion (e.g. Phragmatis australis, Scirpus cyperinus). In conclusion, this thesis, in addition to specifically address these three problematic cases, provides a more comprehensive assessment of the processes of natural regeneration of peatland ecosystems and of driving factors. The results have a direct link with the development of tools for the restoration of peatlands and with a deeper understanding of the responses of plants and communities to environmental changes.
Djan-Chekar, Nathalie. "The bryophyte flora of Bridal Veil Falls, British Columbia : an analysis of its composition and diversity." Thesis, Online version, 1993. https://circle.ubc.ca/bitstream/2429/1348/3/ubc_1993_spring_djan-chekar_nathalie.pdf.
Full textWeibull, Henrik. "Bryophytes on boulders : diversity, habitat preferences and conservation aspects /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2000. http://epsilon.slu.se/avh/2000/99-3371261-6.pdf.
Full textLlewellyn, David J. "The role of bryophytes in an indoor air biofilter." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0015/MQ58353.pdf.
Full textPhillips, Samantha Justine. "The ability of bryophytes to withstand sulphur dioxide pollution." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284357.
Full textMcCarthy, Mirabai Rachel. "Bryophyte Influence on terrestrial and Epiphytic Fern Gametophytes." Oxford, Ohio : Miami University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1193256414.
Full textRudolphi, Jörgen. "Bryophytes, lichens and dead wood in young managed boreal forests /." Uppsala : Dept. of Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200788.pdf.
Full textCallaghan, Des A. "The distributon of Bryophytes in Lancashire: patterns, causes and consequences." Thesis, Edge Hill University, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493267.
Full textWalters, Stephanie E. "The microbial decomposition of six species of New Zealand bryophytes." Thesis, University of Canterbury. Plant and Microbial Sciences, 2001. http://hdl.handle.net/10092/6878.
Full textBurch, Jane Alison. "The response of bryophytes to elevated atmospheric deposition of nitrogen." Thesis, University of Sheffield, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369943.
Full textGranath, Gustaf. "Peatland Bryophytes in a Changing Environment : Ecophysiological Traits and Ecosystem Function." Doctoral thesis, Uppsala universitet, Växtekologi och evolution, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-165138.
Full textLong, Joel Andrew. "Ultrastructure and cytochemistry of sporogenesis in two bryophytes, Notothylas and Takakia /." Available to subscribers only, 2006. http://proquest.umi.com/pqdweb?did=1251821251&sid=10&Fmt=2&clientId=1509&RQT=309&VName=PQD.
Full textSuren, Alastair M. "The ecological role of bryophytes in alpine streams of New Zealand." Thesis, University of Canterbury. Zoology, 1990. http://hdl.handle.net/10092/5717.
Full textLewis, Jason Edward James. "Bio-monitoring for atmospheric nitrogen pollution using epiphytic lichens and bryophytes." Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/13573/.
Full textKelly, Martyn G. "Heavy metals and aquatic bryophytes : accumulation and their use as monitors." Thesis, Durham University, 1986. http://etheses.dur.ac.uk/7086/.
Full textFaburé, Juliette. "Etude de l'accumulation et des effets des composés organiques volatils (BTEX) chez les bryophytes." Lille 2, 2009. http://www.theses.fr/2009LIL2S050.
Full textSporn, Simone Goda. "Epiphytic bryophytes in natural forests and cacao agroforests of Central Sulawesi, Indonesia." Göttingen Georg-August-Univ, 2009. http://d-nb.info/1000139549/34.
Full textMcIntosh, Terry T. "The bryophytes of the semi-arid steppe of South-Central British Columbia." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/27137.
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Krzaczkowski, Lucie. "Recherche exploratoire de substances actives en pharmacologie antitumorale à partir des Bryophytes." Toulouse 3, 2008. http://thesesups.ups-tlse.fr/311/.
Full textOver half of the current anticancer agents in clinical use are natural substances or are derived from natural products mainly isolated from higher plants, micro-organisms and marine sources. The present work has focused on Bryophytes, considered as "lower" plants, as a potential source of compounds acting on mitosis. The screening of 237 samples using a phenotypic cell-based assay revealed forty-one extracts disturbing cell division. The bio-guided fractionation of six active extracts failed to isolate or identify the active substances. We showed that, in some cases, contaminants and/or closely associated micro-organisms might be involved in moss extract activity. Seven extracts from mosses displaying intrinsic activity were further studied using a cell viability assay, cell cycle analysis and quantification of abnormalities detected by the phenotypic assay. Three distinct pharmacological patterns, including two unusual phenotypes, have been identified
Henry, Jason S. "Studies on cell wall composition in bryophytes across taxa, tissue, and time." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/dissertations/1922.
Full textDE, AGOSTINI ANTONIO. "Ecophysiological responses of bryophytes and orchids to environmental pollution: an integrated approach." Doctoral thesis, Università degli Studi di Cagliari, 2022. http://hdl.handle.net/11584/335547.
Full textChristmas, Martin. "Phosphorus dynamics in the Swale-Ouse river system." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4670/.
Full textAmblard-Gross, Géraldine. "Bryophytes et biomonitoring des retombées atmosphériques en métaux et éléments traces : caractérisation de la variabilité à différentes échelles d'utilisation." Metz, 2000. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2000/Amblard_Gross.Geraldine.SMZ0029.pdf.
Full textPoli, Dorothy Belle. "The role of auxin on the evolution of embryo development and axis formation in land plants." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2348.
Full textRincon, Saucedo J. Emmanuel. "Experimental investigations of the ecology of bryophytes in calcareous grassland in northern England." Thesis, University of Sheffield, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338839.
Full textKassel, Marlene. "Effects of climate change on freezing damage in three subarctic bryophyte species." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-130700.
Full textFuselier, Linda Catherine. "MAINTENANCE OF SEXUALLY DIMORPHIC PATTERNS OF GROWTH AND REPRODUCTION IN MARCHANTIA INFLEXA." UKnowledge, 2004. http://lib.uky.edu/ETD/ukybiol2004d00154/fuselier.pdf.
Full textCrowe, Celeste T. "Using the psbA gene as a measure in determining the phylogenetic relationship among bryophytes." [Johnson City, Tenn. : East Tennessee State University], 2002. http://etd-submit.etsu.edu/etd/theses/available/etd-0516102-110619/restricted/crowect053102a.pdf.
Full textFabure, Juliette. "Étude de l'accumulation et des effets des composés organiques volatils (BTEX) chez les bryophytes." Phd thesis, Université du Droit et de la Santé - Lille II, 2009. http://tel.archives-ouvertes.fr/tel-00557714.
Full textBurger, Matthias [Verfasser]. "Functional in vivo analysis of RNA editing factors in bryophytes and angiosperms / Matthias Burger." Ulm : Universität Ulm, 2021. http://d-nb.info/1227450745/34.
Full textLambert, Jean Fiona. "The phenology of selected Mediterranean-type climate bryophytes in relation to temperature and rainfall." Thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/26315.
Full textMansouri, Katayoun. "COMPARATIVE ULTRASTRUCTURE OF APICAL CELLS AND DERIVATIVES IN BRYOPHYTES, WITH SPECIAL REFERENCE TO PLASMODESMATA." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/dissertations/484.
Full textHorwath, Aline Barbara. "Epiphytic bryophytes as cloud forest indicators : stable isotopes, biomass and diversity along an altitudinal gradient in Peru." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610120.
Full textDenayer, Franck-Olivier. "Écotoxicité des éléments traces métalliques chez les bryophytes : mise au point d'un bryocapteur des retombées atmosphériques à l'aide de Ceratodon purpureus (Hedw.) Brid." Metz, 2000. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2000/Denayer.Franck_Olivier.SMZ0051.pdf.
Full textChmielewski, Matthew Wojciech. "Avian Dispersal Networks, Metacommunity Structure, and Bryophyte Community Assemblages." PDXScholar, 2019. https://pdxscholar.library.pdx.edu/open_access_etds/5096.
Full textRussell, Shaun. "Production ecology of bryophyte vegetation at Marion Island (Sub-Antarctic)." Thesis, Rhodes University, 1996. http://hdl.handle.net/10962/d1003793.
Full textBlöcher, Rolf. "Molecular evolution, phylogenetics and biogeography in southern hemispheric bryophytes with special focus on Chilean taxa." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=973439440.
Full textSporn, Simone Goda [Verfasser]. "Epiphytic bryophytes in natural forests and cacao agroforests of Central Sulawesi, Indonesia / Simone Goda Sporn." Göttingen : Georg-August-Univ, 2009. http://d-nb.info/1000139549/34.
Full textWhitelaw, Mari. "Diversity and distribution of epiphytic bryophytes in apple orchards : relationship with tree and substrate variables." Thesis, University of Hertfordshire, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.629457.
Full textBREUIL, SEE ANNE. "Criteres ultrastructuraux d'anhydrobiose et de reviviscence de thalles d'hepatiques du genre riccia l. (marchantiales - bryophytes)." Paris, EPHE, 1995. http://www.theses.fr/1995EPHE3002.
Full textGallissot, Brigitte. "Mise en évidence du potentiel bioaccumulateur des bryophytes aquatiques vis-a-vis des PCB et des pesticides organochlores : étude in situ et en laboratoire : proposition de grilles d'évaluation de la contamination par les organochlorés." Metz, 1988. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1988/Gallissot.Brigitte.SMZ8813.pdf.
Full textOrganochlorine pollution of french rivers (Seine, Isère, Rhône) is studied with autochthonus and implanted aquatic bryophytes. Analysis of PCB, lindane and isomers, HCB, DDT and its metabolites in mosses allows to localise different degrees of pollution in effluents. Implantation on particulary contaminated sites has shown a good resistance of mosses to a multiform pollution : 289 ppm of PCB in mosses implanted in a industrial effluent, 67 ppm of DDT and metabolites in bryophytes in Drac river close to Grenoble. Transfert during 6 days seems to be sufficient to obtain a good analogy between micropollutant concentrations in autochthonous and implanted mosses. Half of equilibrium concentrations is reached in 24 hours. Accumulation and depuration kinetics of PCB by aquatic bryophytes were studied in situ and in laboratory. Accumulation is rapid and the steady state is reached after 10 days of accumulation. Depuration is slow : in 17 days of depuration, bryophytes had eliminated only 47% of initial PCB concentrations. Interspecific differences don't exeed twice factor. Quality indexes based on organochlorine pollution of bryophytes are proposed
Cavalcanti, Porto Katia. "Analyse floristique et écologique de la bryoflore d'une forêt de plaine et d'une forêt d'altitude moyenne dans l'état de Pernambuco (Brésil)." Paris 12, 1989. http://www.theses.fr/1989PA120035.
Full textBranch, Traci L. "Pattern and distribution of RNA editing in land plant RBCL and NAD5 transcripts." Akron, OH : University of Akron, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1163792182.
Full text"December, 2006." Title from electronic thesis title page (viewed 12/31/2008) Advisor, Robert Joel Duff; Committee members, Richard Londraville, Francisco B. Moore, Amy Milsted; Department Chair, Bruce Cushing; Dean of the College, Ronald F. Levant; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.
Porada, Philipp [Verfasser]. "Process-based modelling of lichens and bryophytes and their role in global biogeochemical cycles / Philipp Porada." Mainz : Universitätsbibliothek Mainz, 2014. http://d-nb.info/1047249944/34.
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