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Thèses sur le sujet « Seed bank »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 25 juillet 2025

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1

Tolley, Rebecca. "Seed Bank." Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/5660.

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Book Summary:Issues: Understanding Controversy and Society brings important issues in today's world to students' attention, highlighting the complete historical background, contemporary status, and global view of each. It provides students authoritative context, diverse expert perspectives, and carefully selected primary and secondary sources for truly understanding the issues that currently affect much of our global society, and for developing informed positions on those engendering controversy.

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Tolley, Rebecca. "Seed Banks." Digital Commons @ East Tennessee State University, 2007. https://www.amzn.com/031333725X.

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Book Summary: The business of food and drink is for better and worse the business of our nation and our planet, and to most consumers how it works remains largely a mystery. This encyclopedia takes readers as consumers behind the scenes of the food and drink industries. The contributors come from a wide range of fields, and the scope of this encyclopedia is broad, covering from food companies and brands to the environment, health, science and technology, culture, finance, and more. The more than 150 essay entries also cover those issues that have been and continue to be of perennial importance

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3

Yehnjong, Petra Seka. "Paleozoic Seed Bank and Their Ecological Significance." Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etd/2316.

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Soil seed banks are a reservoir of viable seeds present in the soil in plant communities. They have been studied and characterized in various ways in different habitats. However, these studies are limited to modern seed banks. This study extends seed bank studies to the Paleozoic Era. It was hypothesized that size distribution and seed density in Paleozoic seed banks exhibit similar patterns as in modern seed banks. Seed sizes and seed density of fossil seed from Wise Virginia were estimated. Modern seed bank information was obtained from published data. Data were analyzed using one-way ANOVA

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4

Kellerman, Millicent Johanna Susanna. "Seed bank dynamics of selected vegetation types in Maputaland, South Africa." Diss., Connect to this title online, 2004. http://upetd.up.ac.za/thesis/available/etd-02012005-090837.

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5

Cooper, Cara A. "Melinis repens Seed Bank Longevity in Miami-Dade County." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/677.

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The main objective of this research was to determine the seed bank longevity of Melinis repens at two Southern Florida sites. Seeds were divided among different exposure levels (shade versus sun) and depths (surface versus buried) and tested for baseline viability using 2,3,5-Triphenyl-tetrazolium chloride. Statistical analysis determined that at the pine rockland site there was a significant interaction between time, exposure, and depth. The initial mean viability at this site declined from 49.71% to 11.26% and 13.06% for sun/buried seeds and sun/surface seeds, respectively, by month 8. The m

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6

Martin, Anna. "Mathematical modeling of seed bank dynamics in population genetics." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-321191.

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We study the genealogical structure of samples from a population for which any givengeneration is made up of direct descendants from one randomly chosen previousgeneration. These occur in nature when there are seed banks or egg banks allowingan individual to leave offspring several generations in the future. Kaj et al. studied in2001 the case where any given generation is made up of descendants from severalprevious generations and showed how this temporal structure in the reproductionmechanism causes a decrease in the coalescence rate. In this project we will showthat having all samples pick t

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Davis, Jessica. "Soil seed bank dynamics in Mediterranean urban vegetation fragments." Thesis, Davis, Jessica (2012) Soil seed bank dynamics in Mediterranean urban vegetation fragments. Masters by Coursework thesis, Murdoch University, 2012. https://researchrepository.murdoch.edu.au/id/eprint/12926/.

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Conservation of biodiversity in urban vegetation fragments is of increasingly high importance with growing urbanisation globally, particularly so in the biodiversity hotspot of the Mediterranean southwest of Western Australia. Relationships between fragmentation (connectivity, fragment size, time since isolation) and urban disturbances (weed invasion, human disturbance, rubbish) relative to the soil seed bank of a representative sample of Perth’s urban woodland fragments (N=36) were examined. In total, 182 seedling types comprising 57 invasive, 105 native and 20 unknowns were identified. Appro

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8

Passos, Isabel Maria Melo Mendes. "Importance of seed bank for the management of invasive Acacia dealbata." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/13375.

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Mestrado em Ecologia Aplicada<br>The management of invasive plants is a hard task, which may be further hampered by the existence of extensive and long-lived seed banks. Acacia dealbata is an Australian tree considered one of the most aggressive invasive plant species in Portugal; the species is known to produce a persistent seed bank, but its extension and viability hasn’t been explored. In this work we aim to characterize the seed bank of A. dealbata, namely its extension, germinability and viability, in order to contribute to the management of the species, but also increase knowledge

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Goodson, Joanne Marie. "Environmental controls on the colonisation and establishment of vegetation on river banks under varying grazing pressure." Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289259.

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Auffret, Alistair G., and Sara A. O. Cousins. "Past and present management influences the seed bank and seed rain in a rural landscape mosaic." Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-69879.

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1. Seed bank and seed rain represent dispersal in time and space. They can be important sources of diversity in the rural landscape, where fragmented habitats are linked by their histories. 2. Seed bank, seed rain and above-ground vegetation were sampled in four habitat types (abandoned semi-natural grassland (ABA), grazed former arable field (FAF), mid-field islet (MFI) and grazed semi-natural grassland (SNG)) in a rural landscape in southern Sweden, to examine whether community patterns can be distinguished at large spatial scales and whether seed bank and seed rain are best explained by cur

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11

Short, Nicolyn. "Implications of green manure amendments on soil seed bank dynamics." University of Western Australia. School of Earth and Geographical Sciences, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0022.

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[Truncated abstract] Weeds are a major limitation to agricultural and horticultural production and the main method of control is the use of herbicides. In addition to the resulting chemical pollution of the environment, the wide spread and continues use of herbicides have resulted in many weeds developing resistance to commonly used herbicides. This study investigated the potential of using green manures as a cultural method of control of weed invasion in agricultural fields. To understand the general mechanisms involved in the suppression of seed germination in green manure amended soils, see

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12

Strydom, Matthys. "A perspective on the seed bank dynamics of Acacia saligna." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20389.

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Thesis (MScConEcol)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Acacia saligna, or Port Jackson, is an Australian Acacia which has spread throughout the Western and Eastern Cape provinces of South Africa where it has become invasive and a prominent feature of the vegetation. In areas where A. saligna establishes it replaces natural vegetation, alters ecosystem processes and interferes with agricultural practices. Consequently large management efforts have been made to eradicate this invasive alien tree. However, its large and persistent soil stored seed bank, even in the presence

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Fowler, William. "Soil seed bank dynamics in transferred topsoil: Evaluating restoration potentials." Thesis, Fowler, William (2012) Soil seed bank dynamics in transferred topsoil: Evaluating restoration potentials. Honours thesis, Murdoch University, 2012. https://researchrepository.murdoch.edu.au/id/eprint/13389/.

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Global change, increasing human population growth and urbanisation represent increasing pressures on biodiversity and ecosystem function. It is now widely recognised that conservation of existing natural fragments will not be sufficient to maintain extant biodiversity or meet conservation goals. Thus there is a major and rapidly expanding need for the practice of ecological restoration whereby degraded lands are managed to increase and maintain indigenous species. A soil seed bank germination experiment was conducted over a period of 13 weeks. This aimed to evaluate restoration values of t

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Holmes, P. M. "A comparative study of the seed bank dynamics of two congeneric alien invasive species." Doctoral thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/17724.

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Includes bibliographies.<br>The unique vegetation in the lowlands of the fynbos biome is threatened by alien Acacia encroachment. The seed bank dynamics of the two most widespread invaders in the region, Acacia saligma and A. cyclops, was studied to elucidate those factors contributing most to their invasive success. This information was then used to assist in developing optimal control methods. On the basis of information available prior to this study, it was predicted that both species would have large, persistent seed banks in the so.il, and that seed bank processes would provide the - key

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Rossiter, Stephen Cary. "Effects of the seed bank and interseeding in reconstructed tallgrass prairies." Thesis, The University of North Dakota, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1552216.

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<p> Disturbances such as fire and mowing temporarily increase available resources for plants, opening a window of opportunity for establishment. During the recovery of vegetation after disturbance in remnant prairies, seedling establishment is often negligible compared to vegetative regrowth. It is unclear if this is the case in reconstructions. I tested the contribution of seedlings to diversity after disturbance in two, 25-year-old, low diversity reconstructed prairies by removing seedlings, allowing seedlings, and adding seed in 1 m<sup> 2</sup> plots. Disturbance frequency effects were

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16

Jones, Naomi Elizabeth. "Temporal and spatial variation of the vegetation seed bank and seed-rain in set-aside and adjacent habitats." Thesis, University of Aberdeen, 1995. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU068101.

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In this study set-aside development was monitored (1989-1992) at Aldroughty Farm, Morayshire as part of an integrated project looking at plant and animal dynamics in set-aside, crop and semi-natural habitats. The vegetation, seed bank and seed rain were monitored in adjacent set-aside, semi natural and cropped areas. Initially set-aside vegetation consisted of annual arable species, but wind dispersed species and longer-lived perennials invaded rapidly. This process was more rapid on smaller plots and ingress of perennials occurred more quickly closer to the field margin. There was little inva

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17

Welling, P. (Pirjo). "Regeneration by seeds and vegetation structure in alpine plant communities, subarctic Finland." Doctoral thesis, University of Oulu, 2002. http://urn.fi/urn:isbn:951426861X.

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Abstract The aims were to examine the importance of regeneration by seeds, the influence of plant traits and disturbances, and the role of seed-seedling conflicts in regeneration and in the determination of vegetation structure. The study was carried out at in a subarctic alpine area (Kilpisjärvi 69°01'N 20°50E', Finland). Seed bank and seedling densities were high in many plant communities (ranges 99 -1109 viable seeds/m2 and 0.2-227 seedlings/m2, respectively). Effective seedling recruitment is reflected in vegetation as a high proportion of plants with poor or no vegetative reprodu

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Silva, Carla Antónia Mendes. "Optimização dos testes de germinação para monitorização das colecções de plantas autóctones conservadas em bancos de sementes." Master's thesis, ISA/UTL, 2012. http://hdl.handle.net/10400.5/5364.

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Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia<br>With the aim to contribute to the optimization of germination tests to monitor the seed collections of native plants conserved in seed banks, germination percentage, germination rate (T50) and lenght of the germination period (T10-90) were evaluated in 16 species studied on four temperatures 15°C, 20°C, 25ºC and 15º/25 ºC. The species were subject to pre-germination treatments to break dormancy: cold stratification (30 days) at 4°C in Scrophulariaceae and Umbelliferae, mechanical scarification in Malvaceae, and Fabaceae, a

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Schelling, Lisa R. "Soil seed banks in mixed oak forests in Southeastern Ohio." Ohio : Ohio University, 2006. http://www.ohiolink.edu/etd/view.cgi?ohiou1141850222.

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Nicol, Jason. "Vegetation dynamics of the Menindee Lakes with reference to the seed bank." Title page, table of contents and summary only, 2004. http://web4.library.adelaide.edu.au/theses/09PH/09phn633.pdf.

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Mohammed, Syed. "Dodonaea viscosa complex in South East Australia :seed bank and germination studies." Thesis, Federation University Australia, 1996. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/164886.

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A study was undertaken over one year of the habitat of Dodonaea viscosa subsp. angustissima at Hattah in north west Victoria. These studies, combined with further investigations, indicated significant differences in the germination requirements and behavior of the three species studied.

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Horaist, David W. "Estimating Seed Bank Responses to Changing Environmental Conditions in the Louisiana Coastal Zone." Thesis, University of Louisiana at Lafayette, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10002484.

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<p> The coastal zone of Louisiana is changing due to multiple pressures associated with sea-level rise, subsidence, and the inability of sediment or organic accretion to keep pace. The expected increases in sea level and salinity may affect the distribution of the existing plant communities. In addition, these changes in the environment could lead to shifts in plant community composition. During the summer of 2014, I researched how changes in salinity and water levels may change the establishment of vegetation in Louisiana marshes. Randomly selected Coastwide Reference Monitoring System (CRMS)

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23

Prigmore, Deborah Susan. "Ground flora variation and management in Forestry Commission plantations at Thetford, East Anglia." Thesis, University of East Anglia, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297049.

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Maighel, Mahmood [Verfasser]. "Effect of Arbuscular mycorrhizal fungi and biochar on soil seed bank viability / Mahmood Maighel." Berlin : Freie Universität Berlin, 2016. http://d-nb.info/1117028453/34.

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Pessoa, Carla Daniela de Sales. "Soil Seed Bank in a Caatinga area in Regeneration, Center for Desertification IrauÃuba, CearÃ." Universidade Federal do CearÃ, 2008. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9200.

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CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior<br>O presente trabalho tem como objetivo conhecer os atributos do banco de sementes no solo e verificar quais desses refletem melhor a regeneraÃÃo da caatinga em Ãreas de desertificaÃÃo. Para tanto, investigou-se o banco de sementes no final da estaÃÃo seca, em uma Ãrea de caatinga em processo de degradaÃÃo/desertificaÃÃo, no municÃpio de IrauÃuba, CearÃ. Foram analisados os atributos densidade, composiÃÃo, diversidade e riqueza de espÃcies e cinÃtica de germinaÃÃo. As coletas foram realizadas em trÃs Ãreas, nas fazendas Formigueiro, Cacimba Sal

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Maze, Kristal E. "Seed bank depletion effects on post-fire recruitment of two co-occurring Protea species." Thesis, University of Cape Town, 1993. http://hdl.handle.net/11427/23937.

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Searle, Allyson B. "Reproductive Success and Soil Seed Bank Characteristics of Astragalus ampullarioides and A. holmgreniorum (Fabaceae): Two Rare Endemics of Southwestern Utah." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/3044.

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Astragalus ampullarioides and A. holmgreniorum are two rare endemics of southwestern Utah. Over two consecutive field seasons (2009-2010) we examined pre-emergent reproductive success, based on F/F and S/O ratios, from populations of both Astragalus ampullarioides and A. holmgreniorum, estimated the density of the soil seed bank of A. holmgreniorum as a measure of potential post-emergent reproductive success, and estimated seed persistence within the soil seed bank. Fruit/flower (F/F) ratios and seed/ovule (S/O) ratios varied significantly between populations and among years in both species, a

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Coulombe, Anne-Marie. "Evaluation of the seed bank content as a predictor of weed infestations in crop fields." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21063.pdf.

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Jarvis, Jessie C. "Function of seed-bank ecology in mid-Atlantic semi-annual and perennial Zostera marina beds." W&M ScholarWorks, 2009. https://scholarworks.wm.edu/etd/1539616708.

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The effects of water quality and sediment composition on mid-Atlantic semi-annual and perennial Zostera marina reproductive success, seed-bank viability, and seed germination were elucidated using laboratory and in situ experiments, quantitative field observations, and ecological model simulations. The sediment seed-bank was found to play a large role in the recovery of perennial Z. marina beds in the Chesapeake Bay and in the yearly re-establishment of beds in North Carolina which were determined to have a semi-annual life history. However, the resiliency provided by sediment seed-bank for bo

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Camara, Armando Tadeo Rodriguez da [UNESP]. "Armazenamento de sementes pré-germinadas de Inga vera Willd." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/99770.

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Made available in DSpace on 2014-06-11T19:30:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-08-09Bitstream added on 2014-06-13T19:39:48Z : No. of bitstreams: 1 camara_atr_me_botfca.pdf: 536810 bytes, checksum: 57f5286522d61f84e18be56157805a7d (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Sementes recalcitrantes sempre apresentam dificuldades em seu armazenamento, tornandose um problema para produtores de mudas que muitas vezes não têm como realizar a semeadura logo após a colheita das sementes ou necessitam produzir mudas em diferentes épocas do ano, al

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Santos, Sandy Lia dos. "Dinamica de clareiras : comportamento de especies pioneiras e fatores que afetam sua colonização." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/315170.

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Orientador: Ivany Ferraz Marques Valio<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-05T07:52:23Z (GMT). No. of bitstreams: 1 Santos_SandyLiados_D.pdf: 2051849 bytes, checksum: 71014a56afed5c101f1117b77209e2cc (MD5) Previous issue date: 2005<br>Resumo: A Mata Santa Genebra é um fragmento isolado de Floresta Atlântica. Por se encontrar muito próximo a áreas urbanas, seu ecossistema está sujeito ao resultado das ações humanas. Devido a constante formação de clareiras em seu interior a floresta torna-se de fundamental impor

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Nave, André Gustavo. "Banco de sementes autóctone e alóctone, resgate de plantas e plantio de vegetação nativa na fazenda Intermontes, município de Ribeirão Grande, SP." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-02062005-153506/.

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O acúmulo significativo de conhecimento sobre a ecologia de restauração nos últimos anos tem conduzido a mudanças na orientação dos programas de manejo e restauração florestal. A escolha ou criação de um modelo de restauração é um processo em constante aprimoramento, exigindo a necessidade de estudos que não apenas diminuam os custos envolvidos, mas também, que garantam a efetividade do objetivo proposto. Neste sentido, este trabalho testa novas metodologias de restauração visando a obtenção de informações técnicas sobre: A) a expressão do banco de sementes autóctone e alóctone na restauraçã

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Bobowski, Benny R. "Identification of Belowground Woody Structures Using Molecular Biomarkers." DigitalCommons@USU, 1997. https://digitalcommons.usu.edu/etd/6540.

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Within the last two decades substantial progress has been made in understanding seed bank dynamics and the contribution of the soil seed bank to a post-disturbance plant community. There has been relatively little progress, however, in understanding perennial bud bank dynamics and the contribution of the soil bud bank to secondary succession. This lack of information is due primarily to the inability to reliably identify roots, rhizomes, and lignotubers that lie dormant beneath the soil surface. This scientific investigation, therefore, addressed the issue of identification of belowground wood

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Osei, Nana Akwasi. "Large wood in fluvial systems : quantity, structure and landforms, sediment retention, and riparian seed bank development." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8813.

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This thesis investigates the characteristics and impacts of large wood accumulations within river reaches of different size and style. Four reaches were studied: (i) a wide, braided, headwater reach, characterised by dead wood (Tagliamento River, Italy); (ii) a lower gradient, wide, braided reach, characterised by resprouting wood (Tagliamento River, Italy); (iii) a low gradient, single thread reach with a natural supply of dead wood (Highland Water, UK), and (iv) a low gradient, single thread reach that has been restored by felling trees into the river (River Bure, UK). In each reach, quantit

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Klein, Débora Kestring [UNESP]. "Ecologia do banco de sementes de trecho de floresta estacional semidecidual e germinação de sementes de Peltophorum dubium (Sprenge) Taubert (Fabaceae: Caesalpinioidea) em diferentes condições de alagamento." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/104005.

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Made available in DSpace on 2014-06-11T19:32:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-11-09Bitstream added on 2014-06-13T19:22:48Z : No. of bitstreams: 1 klein_dk_dr_botib.pdf: 427517 bytes, checksum: 69b36be9a11ed0b66d6a420111b90ee9 (MD5)<br>Para um melhor entendimento dos processos que determinam a dinâmica das florestas tropicais, estudos que investigam tanto a vegetação (parte aérea) como o banco de sementes do solo, são necessários. Através de estudos de banco de semente pode-se avaliar, por exemplo, a capacidade de regeneração natural de uma dada vegetação, a viabilida

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Auffret, Alistair G. "Seed mobility and connectivity in changing rural landscapes." Doctoral thesis, Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-89105.

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The success or failure of many organisms to respond to the challenges of habitat destruction and a warming climate lies in the ability of plant species to disperse between isolated habitats or to migrate to new ranges. European semi-natural grasslands represent one of the world's most species-rich habitats at small scales, but agricultural intensification during the 20th century has meant that many plant species are left only on small fragments of former habitat. It is important that these plants can disperse, both for the maintenance of existing populations, and for the colonisation of target

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Klein, Débora Kestring. "Ecologia do banco de sementes de trecho de floresta estacional semidecidual e germinação de sementes de Peltophorum dubium (Sprenge) Taubert (Fabaceae: Caesalpinioidea) em diferentes condições de alagamento /." Botucatu : [s.n.], 2011. http://hdl.handle.net/11449/104005.

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Orientador: Marcelo Nogueira Rossi<br>Coorientador: Renata Cristina Batista Fonseca<br>Coorientador: Vera Lex Engel<br>Banca: Maria Tereza Grombone Guaratini<br>Banca: Wesley Augusto Conde Godoy<br>Banca: Rita de Cássia S. Maimoni Rodella<br>Banca: João Nakagawa<br>Resumo: Para um melhor entendimento dos processos que determinam a dinâmica das florestas tropicais, estudos que investigam tanto a vegetação (parte aérea) como o banco de sementes do solo, são necessários. Através de estudos de banco de semente pode-se avaliar, por exemplo, a capacidade de regeneração natural de uma dada vegetação,

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Navarra, Jennifer J. "Species composition and spatiotemporal pattern of the seed bank and vegetation in native and degraded Florida rosemary scrub." Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4645.

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Due to large pulses of recruitment immediately after fire and population decline with time-since-fire, I predicted seed density with time-since-fire would follow a unimodal function with low density in early and late years post-fire, and highest density at intermediate time-since-fire. I compared seed density data among sites with different time-since-fire: two sites each of three, six, ten and 24 years time-since-fire and three long-unburned sites (greather than]24 years). Variability in seed bank composition and density increased with time-since-fire and only recently burned stands were dist

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Delong, Michael. "Metapopulations and metacommunities in dry forest openings in southern Illinois." OpenSIUC, 2009. https://opensiuc.lib.siu.edu/dissertations/90.

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The type of regional dynamics of a species can provide information on how to manage the species, and may be the only way that some rare species may persist in a given region. A metapopulation is a type of regional dynamic in which local extinction is counterbalanced by recruitment from nearby patches. Metapopulation studies were originally conducted on animals, but have been adapted to plants, and are generally restricted to single-season studies. Plant species may persist as a metapopulation in patchy habitats, such as in forest openings. Forest openings (commonly called barrens, hill pra

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Kalk, Hannah June. "The role of coastal plant community response to climate change: implications for restoring ecosystem resiliency." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/742.

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Accelerated sea-level rise and increased intensity of tropical storm events have challenged the conventional approaches to conservation and restoration of coastal ecosystems. In coastal communities, where survival will depend largely on the ability of species to adapt to rapidly shifting conditions or become established farther inland, historic assemblages may be lost. Seed banks may be an important component of resilience and recovery in response to altered inundation regimes, should they contain species able to adapt or migrate inland. This study assess the ability of seed banks to act as

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SANTOS, Danielle Melo dos. "Variação espacial na dinâmica do banco de sementes em uma área de caatinga em Pernambuco durante três anos consecutivos." Universidade Federal Rural de Pernambuco, 2010. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/4755.

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Submitted by (edna.saturno@ufrpe.br) on 2016-06-15T14:25:03Z No. of bitstreams: 1 Danielle Melo dos Santos.pdf: 428920 bytes, checksum: 322bb464473f572f27942b042957d2dc (MD5)<br>Made available in DSpace on 2016-06-15T14:25:03Z (GMT). No. of bitstreams: 1 Danielle Melo dos Santos.pdf: 428920 bytes, checksum: 322bb464473f572f27942b042957d2dc (MD5) Previous issue date: 2010-06-15<br>Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq<br>Space-time heterogeneity that occurs in dry forests changes seedling emergence rates and habitat’s species richness by influen

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Camara, Armando Tadeo Rodriguez da 1985. "Armazenamento de sementes pré-germinadas de Inga vera Willd. /." Botucatu : [s.n.], 2011. http://hdl.handle.net/11449/99770.

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Orientador: Edson Seizo Mori<br>Banca: Marcia Balistiero Figliolia<br>Banca: Edvaldo Aparecido Amaral da Silva<br>Resumo: Sementes recalcitrantes sempre apresentam dificuldades em seu armazenamento, tornandose um problema para produtores de mudas que muitas vezes não têm como realizar a semeadura logo após a colheita das sementes ou necessitam produzir mudas em diferentes épocas do ano, além de dificultar a conservação de germoplasma. As sementes de ingá, depois de colhidas, perdem sua viabilidade rapidamente, geralmente não ultrapassando 15 dias. As espécies de sementes recalcitrantes normalm

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Hacker, Molly. "ASSESSING SEED BANK CONTRIBUTION TO LANDWARD EXPANSION OF COASTAL WETLAND COMMUNITIES AND RESPONSES TO FIRE AND TRANSLOCATION ALONG COENOCLINE." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/theses/2332.

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Land loss is a major threat to coastal wetlands of the northern Gulf of Mexico due to the impacts and interactions of sea level rise, regional subsidence, and anthropogenic changes to land cover and sediment supply. Here, coastlines are rapidly converting to open water due to an inability of coastal systems to keep pace with sea level rise via marsh migration due to barriers in the landscape, including dense shrub encroachment from fire suppression of inland communities. Fire may play an important role in promoting resiliency by in two ways, first by reducing or removing woody encroachment,

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Postma, Froukje M. "Selection during Early Life Stages and Local Adaptation in Arabidopsis thaliana." Doctoral thesis, Uppsala universitet, Växtekologi och evolution, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302862.

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Organisms are often adapted to their local environment, but the role of early life stages in adaptive differentiation among populations remains poorly known. The aim of my thesis was to investigate the contribution of early life stages to the magnitude and genetic basis of local adaptation, and to identify the underlying adaptive traits. For this, I used two natural populations of the annual plant Arabidopsis thaliana from Italy and Sweden, and a Recombinant Inbred Line (RIL) population derived from a cross between these populations. By combining greenhouse and field experiments, Quantitative

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VanderWeide, Benjamin Lee. "Grazing and drought in tallgrass prairie: the role of belowground bud banks in vegetation dynamics." Diss., Kansas State University, 2013. http://hdl.handle.net/2097/16622.

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Doctor of Philosophy<br>Department of Biology<br>David C. Hartnett<br>Grazing and drought are instrumental in the development and maintenance of perennial grasslands. In this research I tested the belowground bud bank contribution to tallgrass prairie resistance and resilience when perturbed by grazing and drought. First, I tested the bud bank role in vegetation response to and recovery from severe drought (Chapter 2). I compared above- and belowground responses of experimentally droughted plots to ambient controls and irrigated plots during two years of severe drought and two years of recover

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Nielsen, Michele Erin. "Seed and seedling dynamics of the seagrass, Zostera japonica Aschers. and Graebn. and the influence of Zostera marina L." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30172.

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The seagrass Zostera japonica Aschers. and Graebn. occurs as pure populations and in mixture with Zostera marina L. along the intertidal regions of southwest British Columbia. At the Roberts Bank study area seed and seedling dynamics were studied in three vegetation zones: a landward monospecific zone of Z. japonica, a zone of co-existing Z. japonica and Z. marina, and a seaward monospecific zone of Z. marina. Many more seeds were produced than were found in the sediment, and even fewer germinated. Zostera japonica seeds were most abundant in the seed bank in the upper zones where there is hig

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McCue, Kimberlie A. "The ecological genetics of rarity : a study of genetic structure, inbreeding and seed bank dynamics in a rare annual plant /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9841324.

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Fowers, Beth. "Ecologically-Based Manipulation Practices for Managing Bromus tectorum-infested Rangelands." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/1019.

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Cheatgrass (Bromus tectorum) is an invasive annual grass common in several semiarid plant communities in the western U.S. B. tectorum presence increases fire frequency and size, reducing species diversity, and leading to annual species-dominated systems with inconsistent livestock forage potential and degraded wildlife habitat value. Most efforts to manage B. tectorum-dominated rangelands have focused on controlling the plant itself rather than addressing the causes of vegetation change. An alternative approach, ecologically-based invasive plant management (EBIPM), identifies treatments that c

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Tilini, Kassie Lorraine. "The Seed Ecology of Rare and Endangered Gibbens' Beardtongue (Penstemon gibbensii) and Blowout Penstemon (Penstemon haydenii)." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4065.

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Penstemon gibbensii and Penstemon haydenii are two rare, perennial forbs inhabiting remote areas of the western United States. P. gibbensii is listed as a sensitive species by the Bureau of Land Management (BLM) in Colorado, Utah, and Wyoming (Heidel, 2009). P. haydenii was designated as Endangered by the U.S. Fish and Wildlife Service in 1987 (Heidel, 2012). This thesis research was geared toward helping land managers in their efforts to protect and rehabilitate these species by providing understanding on different aspects of their seed ecology. My first study was a laboratory experiment perf

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Keammerer, Holly Barton 1983. "Community structure, plant interactions, seedling performance and seed bank composition of salt marshes along an estuarine gradient in Coos Bay, Oregon." Thesis, University of Oregon, 2011. http://hdl.handle.net/1794/11256.

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xviii, 160 p. : ill. (some col.)<br>Salt marshes are intertidal communities dominated by halophytic vascular plants that are subjected periodically to tidal inundation. These species have developed various adaptations to this stress, including tolerances of fluctuating salinity, extended periods of inundation and intervals of anoxic conditions. The marshes are divided into zones of different plant communities based on species' tolerances of ambient estuarine conditions. Abiotic stresses change along the estuarine salinity gradient (marine to riverine), potentially altering development and c

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