Thematische Bibliographien / Native plants / Dissertationen
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Dissertationen zum Thema „Native plants“

Autor: Grafiati
Veröffentlicht am 4. Juni 2021
Zuletzt aktualisiert am 30. Juli 2024

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1

Zuefle, Marion E. „The impact of non-native woody plants on the native herbivorous insect community of northern Delaware“. Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 75 p, 2006. http://proquest.umi.com/pqdweb?did=1163239621&sid=7&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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2

Von, Richter Lotte Victoria. „Native plants of Eastern Australia as bedding plants“. Thesis, The University of Sydney, 1996. https://hdl.handle.net/2123/27551.

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Bedding plants are used extensively in many landscaping situations. The majority of bedding plants marketed commercially are exotic species with only limited propagation material of Australian species available. The objectives of this work was to assess Australian short—lived perennial species as bedding plants with particular reference to their ease of propagation from seed. An extensive survey of Eastern states Australian native annual and short lived perennial species has identified the following species as showing potential as bedding plants.
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3

White, Annie. „From Nursery to Nature: Evaluating Native Herbaceous Flowering Plants Versus Native Cultivars for Pollinator Habitat Restoration“. ScholarWorks @ UVM, 2016. http://scholarworks.uvm.edu/graddis/626.

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There is growing awareness about the value of preserving and restoring floral-rich habitats for the benefit of pollinators, especially native bees. The increasing demand for native plants in pollinator habitat restoration and other ecological landscaping applications, combined with the desire for more robust and predictable plant habits, have led to the selection and breeding of native cultivars. Yet, little is known about how these cultivated varieties differ from the native species in their ability to attract and support pollinators. I compared flower visitation by all insect pollinators to 12 native herbaceous plant species and 14 native cultivars in a replicated field experiment at two sites over two years. I classified insect pollinators during visual field observations into seven taxonomic and functional groups. I found seven native species to be visited significantly more frequently by all insect pollinators (combined) than their cultivars, four were visited equally, and one native cultivar was visited more frequently than the native species. Bees (both native and non-native) and moths/butterflies exhibited similar preferences, whereas flies showed no preference between the native species and the native cultivar. Our study shows that many insect pollinators prefer to forage on native species over cultivated varieties of the native species, but not always, and not exclusively. Some native cultivars may be comparable substitions for native species in pollinator habitat restoration projects, but all cultivars should be evaluated on an individual basis. Plant selection is integral to the value and success of pollinator habitat restorations, yet there is little consistency and overlap in pollinator planting recommendations and very little empirical data to support plant choice. Non peer-reviewed pollinator plant lists are widely available and are often region-specific, but they are typically based on anecdotal rather than empirical data and lack in specificity. To help close the gap between anecdotal and empirical data, and between practice and research, I reviewed the published literature on plant selection for pollinator habitat restoration. I explicitly reviewed and compared the value of native plant species, near-natives, non-natives and native cultivars. From there, I identified gaps in the literature that are most needed in practice and recommended basic strategies for practitioners to navigate plant lists and choose the best plants for a site's success.
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4

Cerqueira, Nicole. „Pollinator visitation preference on native and non-native congeneric plants“. Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 2.91 Mb., 84 p, 2005. http://wwwlib.umi.com/dissertations/fullcit/1428175.

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5

Vodraska, Ellery Ala. „The influence of native plants on arthropod population dynamics can native plants enhance conservation biological control /“. College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8239.

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Thesis (M.S.) -- University of Maryland, College Park, 2008.
Thesis research directed by: Dept. of Entomology. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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6

Ruchala, Stacy L. „Propagation of Several Native Ornamental Plants“. Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/RuchalaSL2002.pdf.

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7

Beilharz, Vyrna Caldwell. „Cercosporoid fungi on Australian native plants /“. Connect to thesis, 1994. http://eprints.unimelb.edu.au/archive/00000670.

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8

Howery, Larry D., Ed Northam, Walt Meyer, Jennifer Arnold, Emilio Carrillo, Kristen Egen und Mary Hershdorfer. „Non-Native Invasive Plants of Arizona“. College of Agriculture, University of Arizona (Tucson, AZ), 2016. http://hdl.handle.net/10150/625545.

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84 pp. / First Edition Published 2001
The noxious weed problem in the western United States has been described as, a biological forest fire racing beyond control because no one wants to be fire boss. Indeed, when small weed infestations are left unchecked, they can grow exponentially and spread across the land much like a slow-moving biological wildfire. However, land consumed by fire usually recovers and is often more productive than before the fire occurred. On the other hand, land consumed by noxious weeds may be irreversibly changed and never again reach its full biological potential. Reviewed 12/2016, First Edition Published 2001
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Howery, Larry D., Ed Northam, Walt Meyer, Jennifer Arnold, Emilio Carrillo, Kristen Egen und Mary Hershdorfer. „Non-Native Invasive Plants of Arizona“. College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2009. http://hdl.handle.net/10150/146922.

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84 pp.
First Edition Published, 2001
The noxious weed problem in the western United States has been described as, a biological forest fire racing beyond control because no one wants to be fire boss. Indeed, when small weed infestations are left unchecked, they can grow exponentially and spread across the land much like a slow-moving biological wildfire. However, land consumed by fire usually recovers and is often more productive than before the fire occurred. On the other hand, land consumed by noxious weeds may be irreversibly changed and never again reach its full biological potential.
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10

GOODWIN, TROY LAWRENCE. „PRESERVING NATIVE PLANTS THROUGH REGULATION: A CASE STUDY OF THE CITY OF TUCSON'S NPPO (NATIVE PLANT PRESERVATION ORDINANCE)“. Thesis, The University of Arizona, 2001. http://hdl.handle.net/10150/555346.

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11

Yu, Ming-yee. „Enriching native floristic diversity in exotic tree plantation in Hong Kong“. Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B39558113.

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12

Tarrant, Valerie M., und valerie tarrant@deakin edu au. „Melbourne's indigenous plants movement: The return of the natives“. Deakin University. School of History, Heritage and Society, 2005. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20061207.113857.

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This thesis examines Greater Melbourne’s indigenous plants movement from the 1930s to the early twenty first century. It demonstrates the important scientific and educational role of the public intellectual, Professor John Turner, and of the Melbourne University Botany School which he led for thirty five years. The case study of the movement within the City of Sandringham and its successor the City of Bayside reveals how the inhabitants of an urbanised are responded to threats to the indigenous trees and wildflowers of their neighbourhood, stimulating botanists to assist them and using political means in order to achieve their conservation objectives. The thesis draws upon a range of local archives, conservation literature and private papers.
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13

Lee, Elsa. „Colonization of exotic plantations by native plants and mammals in Hong Kong“. Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B31194783.

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14

Reichman, Suzanne Maree. „Responses of Australian native plants to metal toxicity /“. St. Lucia, Qld, 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16424.pdf.

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15

Wilson, Sarah Jane. „Freshwater macroinvertebrate communities on exotic and native plants“. Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101665.

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Aquatic plants play an important role in the survival and proliferation of invertebrates in freshwater ecosystems. Exotic plants are now common in North American lakes and rivers, where they may displace native plants, thereby potentially altering epiphytic invertebrate communities. Differences in aquatic invertebrate communities on native and exotic plants are examined here through (1) a meta-analysis of published data, and (2) two field surveys in northeastern North America that compared invertebrates on the exotic Myriophyllum spicatum and Potamogeton crispus to those on their native congeners. The meta-analysis revealed that exotic plants generally support lower invertebrate abundance than do natives, while invertebrate taxa richness tends to be similar on exotic and native plants. The field surveys demonstrated that M. spicatum and P. crispus support significantly different invertebrate densities and lower taxa richness than their structurally similar native congeners. These results suggest that the replacement of native plants by exotics---even those with similar morphology---may cause concomitant changes to aquatic ecosystems.
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16

Reiling, Kevin. „The effects of ozone on British native plants“. Thesis, University of Newcastle Upon Tyne, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240932.

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17

Zhang, Zhijie [Verfasser]. „Coexistence of alien and native plants / Zhijie Zhang“. Konstanz : KOPS Universität Konstanz, 2020. http://d-nb.info/1223371883/34.

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18

Negahban, Marzieh. „The medicinal effects of two Australian native plants“. Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/206455/1/Marzieh_Negahban_Thesis.pdf.

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Chronic wounds are a costly and growing problem to global health care systems and affect the productivity of patients and their quality of life. In all cultures, people have used medicinal plants for the treatment and alleviation of various health issues. This project has shown a new potential role for the primary extracts and isolated compounds of C. terminalis derived-kino and the primary extracts of H. tiliaceus (L.) leaves as wound healing agents in vitro, and hence, potentially paves the way for future novel therapeutics for the treatment of chronic non-healing wounds.
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19

Ballard, Meg. „Insect populations on early successional native and alien plants“. Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 50 p, 2006. http://proquest.umi.com/pqdweb?did=1203553531&sid=1&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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20

Mealor, Brian A. „Native plant population resilience to exotic invasion“. Laramie, Wyo. : University of Wyoming, 2006. http://proquest.umi.com/pqdweb?did=1221731861&sid=7&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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21

Costa, Gislene Parreiras [UNESP]. „Estudo da atividade antioxidante de folhas e polpa de Annona crassiflora Mart. para utilizar como fitocosmético“. Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/150513.

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O Cerrado, um dos principais biomas brasileiros, tem sofrido sucessivas agressões a sua biodiversidade, ocasionando o desaparecimento de inúmeras espécies com potencial biotecnológico. Dentre as espécies típicas do Cerrado, Annona crassiflora Mart. (Annonaceae), também conhecida como marolo, possui especial importância, principalmente devido à presença de fitoquímicos com ação antioxidante. O presente trabalho teve como objetivo investigar a ação antioxidante e quantificar a presença de fenóis, flavonoides e taninos nos extratos hidroalcoólicos obtidos a partir das folhas e da polpa de frutos de A. crassiflora. Foi possível verificar que o extrato hidroalcoólico obtido a partir das folhas de A. crassiflora apresentou valores de compostos fenólicos, flavonoides e taninos equivalentes aos respectivos padrões (ácido gálico, quercetina e proantocianidinas, respectivamente). Com base nestes resultados, foi produzido e testado, in vitro, um fitocosmético em forma de gel. Com base nos resultados obtidos foi possível concluir que a formulação de um gel enriquecido com este extrato abre a possibilidade do desenvolvimento de um novo fitocosmético com atividade antienvelhecimento.
The Cerrado, one of the main Brazilian biomes, has undergone successive aggressions against its rich biodiversity, causing the disappearance of numerous species with biotechnological potential. Among the typical species of the Cerrado, Annona crassiflora Mart. (Annonaceae), also known as marolo, has special importance, mainly due to the presence of phytochemicals with antioxidant action. The present work had as objective to investigate the antioxidant action and to quantify the presence of phenols, flavonoids and tannins in the hydroalcoholic extracts obtained from the leaves and fruit pulp of A. crassiflora. It was possible to verify that the hydroalcoholic extract of A. crassiflora leaves contain phenolic compounds that can serve as natural sources of antioxidant agents, especially tannins. Based on these results, we produced and testedppp, in vitro, a phytocosmetic in gel form, obtaining very promising results. In this way, the formulation and evaluation of a gel enriched with this extract opens the possibility of the development of a new phytocosmetics with antiaging activity.
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Holman, Lauren Anne Trish. „Discovering the path to Indian uses of native California plants: A family activity guide for the native plant garden at the San Bernardino County Museum“. CSUSB ScholarWorks, 2005. https://scholarworks.lib.csusb.edu/etd-project/2859.

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The objective of this project is to develop an activity guide for the California native plant trail located adjacent to the San Bernardino County Museum that allows families to discover native California plants while increasing environmental and cultural sensitivity.
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Venable, Christina. „The use of native plants for revegetation along West Virginia highways“. Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=4057.

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Thesis (M.S.)--West Virginia University, 2005.
Title from document title page. Document formatted into pages; contains vi, 65 p. : map (part col.). Includes abstract. Includes bibliographical references (p. 45-49).
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24

Schuurmans, Julia. „Evidence for Heavy Metal Accumulation in Native Australian Plants“. Thesis, Curtin University, 2021. http://hdl.handle.net/20.500.11937/85770.

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This study investigated the accumulation of toxic heavy metals in native vegetation when grown on mine tailings and determined potential exposure pathways to animals and humans. Analytical chemistry techniques were employed by using spectroscopy and electrochemistry to determine heavy metal quantities in plants, soil and water, which was able to determine the persistence of heavy metals in soil and that plants were bioaccumulating higher concentrations of heavy metals when grown in or nearby mine tailings.
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Szantoi, Zoltan Chappelka Arthur H. „Use of ethylenediurea (EDU) to assess ozone effects on native vegetation“. Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/master's/SZANTOI_ZOLTAN_22.pdf.

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26

Wennerberg, Sarah B. „Propagation and field assessment of West Virginia native species for roadside revegetation“. Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4157.

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Thesis (M.S.)--West Virginia University, 2005.
Title from document title page. Document formatted into pages; contains vii, 65 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references.
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Golemiec, Anneke. „Disentangling the Impacts of Exotic Plants and Habitat Disturbance on Native Plant Richness and Abundance“. Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/41068.

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Invasive plants are widely cited as a major threat to native plant communities, and the correlation between plant invasions and a subsequent decline in native species is well documented at some scales. However, one outstanding question is the degree to which invasive species are a driver of native plant declines versus a correlate of other drivers, such as habitat disturbance. These two hypotheses to explain the dominance of invasive species in communities have been termed the ‘driver’ and ‘passenger’ models, respectively. In order to understand the impacts of plant invasion on native plants we need more studies that consider the role of correlated environmental predictors, which may play unseen roles in the response and recovery of native plant communities frequently attributed to invasion alone. Using a large database of plant community and environmental data from sites across Southern Ontario, I used path analyses to examine the direct and indirect relationships between disturbance, exotic and native plant richness, and relative abundance. Counter to my initial predictions, I found support for both the partial passenger and partial driver models of invasive dominance, while full passenger models were outright rejected. The causal hypotheses consistent with the data indicated significant relationships between native and exotic species richness and native and exotic relative abundance across models. An exploratory analysis, which examined species-specific models, found that the data was consistent with seven out of twelve causal hypotheses. Models that could not be rejected were split almost evenly across full passenger, partial passenger, and partial driver models. Model support varied according to the species included in the dataset suggesting that the best fit underlying model of invasive dominance likely varies by species. While the partial passenger and partial driver models were recurrently consistent with the data, no single model described the underlying patterns of invasive dominance across all systems.
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SOUZA, Cynthia Domingues de. „Comportamento ecofisiológico de espécies arbóreas nativas do Cerrado e exóticas“. Universidade Federal de Goiás, 2008. http://repositorio.bc.ufg.br/tede/handle/tde/429.

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It was used the "transpirometer of balance" for planting of five tree species to evaluate the physiological behaviour regarding: total transpiration, stomatal conductance and transpiration leaf, growth, partition of phytomass, study the fluorescence of chlorophyll a e anatomical study of leaves of the species : Tabebuia serratifolia Nichols (Ipê yellow), Hymenaea stigonocarpa Mart. Ex Hayne (Jatobá), Myroxilum balsamum (Linn) Harms (Balsamo), Eucalyptus camaldulensis Dehn and Eucalyptus citriodora Hook (eucalyptus). The equipment consisted of a hydraulic system, composed of three elements: a reservoir of water (R1), another with a buoy (R2) to control the level of water in vessels (V) where the tree species were planted. The soil was analyzed by LASF / UFG-AGRO. It recommended, for pot, dolomitic lime (50g) and 88g of NPK (4-14-8). This study is subdivided parcels of split plot in time (split-plot in time), at a significance level of 5%, analyzed by SAS / STAT. E. camaldulensis and E. citriodora showed similar transpiration. Ipê, jatobá and balsamo showed no significant difference between them. The porometric measures suggested that the species obey strict control stomatic, with the closing of the stomates in the light of high evaporative demand of the air, changing the rates transpiration and stomatal conductance along the hours of the day. Evaluations biophysical showed that the growth in height, diameter and leaf area of E. camaldulensis was superior to other species. To partition of biomass, this species showed significant difference in dry stems, leaves and roots. The photochemical efficiency of photosystem II (Fv / Fm) was statistically similar to the species E. citriodora, E. camaldulensis, ipê and balsamo, with a significant difference between the ratio (Fv / Fm), E. camaldulensis and jatobá, suggesting that the jatobá showed greater susceptibility of photosystem II in this experiment because of the high brightness. The study of the anatomy leaf showed that E. camaldulensis and E. citriodora have leaves amphistomatic with stomatestype anomocytic, ipê and balsamo have leaves hypostomatics with stomates anomocytic. Jatobá leaves hypostomatics with paracytic stomates. Given the results, it is suggested that the leaf anatomy influenced the rate transpiration resulting in differences in growth and biomass of partition. Ipê, jatobá and balsamo had more layers of lacunary parenchyma than eucalyptus, adaptive characteristics that allow those species colonize places of lesser brightness. All species showed secretory cavities. The stomatic density estimated average of each species indicated proximity of the values found in sclerophylly plants (100-500/mm ²). This work showed the importance of the physiological responses of the tree species, on the consumption of water, helping in the definition of strategies for management of natural environments, guided information for reflorestations with native and exotic species in the savanna in Goias states.
Utilizou-se o Transpirômetro de equilíbrio para plantio de cinco espécies arbóreas para avaliar o comportamento fisiológico quanto à: transpiração total, transpiração e condutância estomática foliar, crescimento, partição de fitomassa, estudo da fluorescência da clorofila a e estudo anatômico de folhas das espécies: Tabebuia serratifolia (Vahl) Nichols (Ipê amarelo), Hymenaea stigonocarpa Mart. Ex Hayne (Jatobá), Myroxilum balsamum (Linn) Harms (Balsamo), Eucalyptus camaldulensis Dehn e Eucalyptus citriodora Hook (eucaliptos). O equipamento consistiu de um sistema hidráulico, composto de três elementos: um reservatório de água (R1), outro com uma bóia (R2) para controlar o nível de água nos vasos (V) onde foram plantadas as espécies arbóreas. O solo foi analisado por LASF/UFG-AGRO. Recomendou-se, por vaso, calcário dolomítico (50g) e 88g de NPK (4-14-8). Configurou-se experimento de parcelas subdivididas no tempo (split-plot in time), a um nível de significância de 5%, analisados por SAS/STAT. E. camaldulensis e E. citriodora apresentaram transpiração semelhantes. Ipê, jatobá e bálsamo não apresentaram diferença significativa entre si. As medidas porométricas sugeriram que as espécies obedecem a rigoroso controle estomático, com o fechamento dos estômatos em função da alta demanda evaporativa do ar, alterando as taxas transpiratórias e de condutância estomática ao longo das horas do dia. As avaliações biofísicas evidenciaram que o crescimento em altura, diâmetro e área foliar de E. camaldulensis foi superior às outras espécies. Para partição de fitomassa, essa espécie apresentou significativa diferença em matéria seca de caule, folhas e raiz. A eficiência fotoquímica do fotossistema II (Fv/Fm) foi estatisticamente semelhante para as espécies E. citriodora, E. camaldulensis, ipê e bálsamo, havendo diferença significativa entre a razão (Fv/Fm) de E. camaldulensis e do jatobá, sugerindo que o jatobá apresentou maior susceptibilidade do fotossistema II nesse experimento em razão da alta luminosidade. O estudo da anatomia foliar revela que E. camaldulensis e E. citriodora têm folhas anfiestomáticas com estômatos tipo anomocítico, T. serratifolia e M. balsamum têm folhas hipostomáticas com estômatos anomocíticos, Hymenaea stigonocarpa folhas hipostomáticas com estômatos paracíticos. Diante dos resultados, sugere-se que a anatomia foliar influenciou a taxa transpiratória resultando em diferenças no crescimento e partição de fitomassa. Ipê, jatobá e bálsamo apresentaram mais camadas de parênquima lacunoso do que os eucaliptos, características adaptativas que permitem essas espécies colonizar locais de menor luminosidade. Todas as espécies estudadas apresentaram cavidades secretoras. A densidade estomática média estimada de cada espécie indicou proximidade dos valores encontrados em plantas esclerófilas (100-500/mm²). Este trabalho evidencia a importância das respostas fisiológicas das espécies arbóreas, quanto ao consumo de água, contribuindo na definição de estratégias de manejo de ambientes naturais, norteando informações para reflorestamentos com espécies exóticas e nativas no Cerrado goiano.
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Brimacombe, Karen A. „Research on native plants for coastal wetland restoration on O'ahu“. Thesis, University of Hawaii at Manoa, 2003. http://hdl.handle.net/10125/7022.

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Outplanting field trials were conducted to identify native wetland plant species that would be useful to coastal wetland restoration on Oʻahu. The effects of soil salinity and soil temperature, initial planting density, and removal of competition on survival and growth of outplanted species were examined. Germination response of four native wetland sedges to different water, salinity and temperature regimes was also investigated. Final survival exceeded 70 percent in four of the seven outplanted species. Soil salinity and soil temperature were negatively correlated with survival in only one species. Planting density and removal of competition had little effect on final survival and growth of outplanted species. Germination under experimental conditions exceeded 25 percent in only two of the four sedge species studied. Overall, seeds germinated to a higher percentage under lower temperatures and salinities than under higher temperatures and salinity levels. Water level had little effect on final germination percentage.
xi, 113 leaves
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Hua, Yujie. „Changes of Soil Biogeochemistry under Native and Exotic Plants Species“. FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/1912.

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Invasive plant species are major threats to the biodiversity and ecosystem stability. The purpose of this study is to understand the impacts of invasive plants on soil nutrient cycling and ecological functions. Soil samples were collected from rhizosphere and non-rhizosphere of both native and exotic plants from three genera, Lantana, Ficus and Schinus, at Tree Tops Park in South Florida, USA. Experimental results showed that the cultivable bacterial population in the soil under Brazilian pepper (invasive Schinus) was approximately ten times greater than all other plants. Also, Brazilian pepper lived under conditions of significantly lower available phosphorus but higher phosphatase activities than other sampled sites. Moreover, the respiration rates and soil macronutrients in rhizosphere soils of exotic plants were significantly higher than those of the natives (Phosphorus, p=0.034; Total Nitrogen, p=0.0067; Total Carbon, p=0.0243). Overall, the soil biogeochemical status under invasive plants was different from those of the natives.
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Rahutomo, Suroso. „The response of allocasuarina littoralis, hakea florulenta and hakea actities to organic phosphorus /“. [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18867.pdf.

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32

Gilbert, Benjamin. „Determinants of native and non-native plant distributions in a temperate forest understory“. Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19731.

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A new sampling method that decouples spatial and environmental correlations was developed and applied to a temperate forest understory. Data were used to contrast niche theory with neutral theory, and only showed support for niche theory. A spatial and environmental partitioning analysis indicated that the effects of dispersal are primarily important within the spatial extent of environments suitable for a given species. The same sampling data were used to test correlates of non-native species invasion at a species level and as a group. The distributions of non-native plant species are also better explained by the niche model; however, non-native species do not appear to negatively impact native species, nor to be negatively impacted by native species. Together, these results suggest that the forest understory is strongly niche-structured, but likely not saturated. Diversity in this forest appears to be primarily determined by regional processes, and only secondarily by local species interactions.
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McReynolds, Kim. „Arizona Native Plant Law: What You Need to Know“. College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2010. http://hdl.handle.net/10150/146958.

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Hanes, Scott Burton Wright Amy Noelle. „Organic matter type affects growth and physiology of native plants planted above-grade“. Auburn, Ala, 2009. http://hdl.handle.net/10415/1895.

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35

McReynolds, Kim, und Cori Dolan. „Invasive Plants on Small Acreage Properties in Arizona“. College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2010. http://hdl.handle.net/10150/144770.

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3 pp.
Tips for Arizona's Rural Landowners Series -- Plants Unit
The Tips for Arizona's Rural Landowners Fact Sheet Series is intended to educate homeowners who have recently purchased small acreages in Arizona. The purpose of the series is to give homeowners information about living in rural settings. The Plant Unit includes fact sheets on Arizona's native plant law, small-scale gardening, pasture establishment, invasive plants, and assessing plant damage.
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Lee, Elsa, und 李詠心. „Colonization of exotic plantations by native plants and mammals in Hong Kong“. Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31194783.

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37

Corsello, Rachel. „Increasing Germination Rates and Population Growth of Native Plant Gardens on College Campuses“. Wittenberg University Honors Theses / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=wuhonors161787669427921.

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38

Barrientos, Christian Alberto. „Fish abundance and community composition in native and non-native littoral aquatic plants at Lake Izabal, Guatemala“. [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0012100.

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39

Abrahão, Anna 1988. „Estratégias de forrageamento de plantas em campos rupestres da Cadeia do Espinhaço, MG, Brasil = aquisição e uso de nitrogênio e fósforo = Plant foraging strategies in rupestrian fields from the Espinhaço range, Minas Gerais, Brazil: nitrogen and phosphorus acquisition and use“. [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316209.

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Orientador: Rafael Silva Oliveira
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
Made available in DSpace on 2018-08-23T02:26:20Z (GMT). No. of bitstreams: 1 Abrahao_Anna_M.pdf: 1511361 bytes, checksum: dc831d20228afc2bba2cbea5130726b4 (MD5) Previous issue date: 2013
Resumo: Apesar da grande diversidade de espécies de plantas nativas de solos tropicais e pobres em nutrientes, pouco se sabe sobre a diversidade de mecanismos de aquisição e uso de nutrientes nesses ambientes. Nesse contexto, o objetivo desse estudo foi entender como ocorre à aquisição e o uso de nitrogênio (N) e fósforo (P) em fisionomias rupestres de cerrado na Cadeia do Espinhaço, em Minas Gerais, sudeste do Brasil, em ambiente muito pobre em nutrientes. No primeiro capítulo, nós descrevemos e investigamos o status micorrízico e o papel funcional da especialização radicular de Discocactus placentiformis (Cactaceae), uma espécie abundante de campos rupestres na Cadeia do Espinhaço. As raízes possuem pelos abundantes que aderem grãos de areia. A nossa hipótese foi que as raízes de D. placentiformis não possuem colonização por micorrizas, e funcionam de forma similar a cluster roots, aumentando a liberação de ácidos orgânicos quando submetidas à deficiência de P. Nós não observamos colonização por micorrizas nas raízes de D. placentiformis. Ao coletar e analisar os exsudatos radiculares identificou ácido oxálico, málico, cítrico, láctico, succínico, fumárico e malônico, em ordem decrescente de concentração. Como esperado, a exsudação total aumentou com a deficiência de P. O papel ecofisiológico dessa nova especialização radicular parece ser semelhante ao de raízes do tipo cluster roots. Esses resultados sugerem uma convergência funcional entre estratégias nutricionais de plantas em hábitats pobres em nutrientes. No segundo capítulo, em nível de comunidade, comparamos as assinaturas isotópicas de N (?15N) e a colonização por micorrizas dos representantes mais abundantes de três fisionomias rupestres de cerrado, com disponibilidades distintas de N no solo (campos rupestres, campos úmidos e cerrados ralos). Nós testamos a hipótese de que o ?15N foliar aumenta com o N total no solo e que as fisionomias mais pobres em N apresentam um maior intervalo de valores de ?15N foliar, possuindo então maior diversidade de estratégias de aquisição de N. Em todas as fisionomias nós observamos uma disponibilidade de nitrogênio muito baixa, principalmente nos campos rupestres. Ao contrário do esperado, nós observamos uma relação negativa entre os valores de ?15N foliar e o N total no solo. Apesar das diferenças de nitrogênio no solo, os valores de N foliar foram similares entre as fisionomias. Os resultados também mostram que o maior intervalo de valores de ?15N foliar não está associado com o ambiente com menor valor de N total no solo. No entanto, como esperado, a grande variação nos valores de ?15N foliar aponta a diversidade de mecanismos de aquisição de nitrogênio. A eficiência na aquisição de fósforo por meio de especializações radiculares e a diversidade de mecanismos de absorção de nitrogênio podem ajudar a manter a grande diversidade de espécies nesses ambientes rupestres. Além disso, parece haver uma convergência funcional destes ambientes pobres em nutrientes da América do Sul com ambientes pobres em nutrientes de outras partes do mundo
Abstract: Despite the great plant species richness in tropical and nutrient-poor soils, little is known about nutrient-acquisition strategies in these environments. In this context, the aim of this work was to understand the acquisition and use of nutrients in a nutrient-impoverished site in Brazil. Therefore, we studied nitrogen and phosphorus acquisition and use in rupestrian physiognomies at the Espinhaço mountain range, in Minas Gerais, southeastern Brazil. In the first chapter, we described and investigated a sand-binding root specialization of Discocactus placentiformis (Cactaceae), a common species in rupestrian grasslands white sands. We hypothesized that D. placentiformis is non-micorrhizal and increases organic acid release when submitted to P deficiency. We collected and analyzed root exudates from plants subjected to different phosphorus supplies. We identified oxalic, malic, citric, and lactic, succinic fumaric and malonic acids, in decreasing order of concentration. As expected, total exudation decreased with P supply. These results show that the ecophysiological role of this root specialization seems to be similar to cluster roots, pointing towards a functional global convergence in nutrient-acquisition strategies between plants from nutrient-poor habitats. In the second chapter, at the community level, we compared N isotopic signatures (?15N), from the most abundant species in three rupestrian cerrado communities (rupestrian fields, humid fields and shrublands). We tested the hypothesis that foliar ?15N values increases with N availability, and that physiognomies with lower N availability present a higher range of foliar ?15N values. In all the physiognomies, we observed a very low N availability, especially in the rupestrian grasslands. Contrary to expectations, we observed a negative relation between foliar ?15N values and total soil N. Despite the differences in soil N, total foliar N values were similar among physiognomies. These results show that higher foliar ?15N do not always indicate higher soil N availability and that the widest range of foliar ?15N is not always associated with lowest total soil N. However, as expected, we observed a high range in foliar ?15N, indicating diversity in N-acquisition strategies. The efficiency in phosphorus acquisition by root specializations and the diversity in nitrogen-acquisition mechanisms may help maintaining the high species diversity in these habitats. Additionally, there seems to be a functional convergence between rupestrian communities and other nutrient-poor sites in the world
Mestrado
Ecologia
Mestra em Ecologia
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40

Sirdaarta, Joseph P. „Phytochemical Study and Anticancer Potential of High Antioxidant Australian Native Plants“. Thesis, Griffith University, 2016. http://hdl.handle.net/10072/365567.

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High antioxidant capacities have been linked with a reduction in the incidence of chronic diseases including cardiovascular disease, diabetes, obesity, neurodegeneration, inflammation and cancer. Furthermore, phenolic antioxidants may not only have protective effects against these diseases, but may also have therapeutic potential in reversing them by modulation of the cellular redox state. Thus, plants with high antioxidant capacities have potential in the development of new chemotherapeutic treatments to prevent and treat some cancers. Several native Australian plant species including Terminalia ferdinandiana Exell (Kakadu plum), Tasmannia lanceolata (Poir.) A.C.Sm., (Tasmannian pepper), Syzygium australe (H.L.Wendl. ex Link) B.Hyland (brush cherry), Syzygium luehmannii (F.Muell.) L.A.S.Johnson (riberry), Davidsonia pruriens F.Muell. (Davidson’s plum), Elaeocarpus angustifolius Blume (quandong), Kunzea pomifera F.Muell. (muntries), Podocarpus elatus R.Br.ex Endl., (Illawarra plum) and Acronychia acidula F.Muell., (lemon aspen) have recently been reported to have extraordinarily high antioxidant content and were therefore selected to screen for the ability to inhibit proliferation of selected carcinoma cell lines.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Natural Sciences
Science, Environment, Engineering and Technology
Full Text
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41

Zahreddine, Hala G. „The domestication of Lebanese native tree species“. The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1130506554.

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42

Lenz, Tanja. „The effect of resource dynamics on invasive annual and native perennial grasses in grasslands of the mid-north of South Australia /“. Title page, table of contents and abstract only, 2004. http://web4.library.adelaide.edu.au/theses/09PH/09phl575.pdf.

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43

Ridenour, Wendy L. „No simple tradeoffs Centaurea plants from America are better competitors and defenders than plants from the native range /“. CONNECT TO THIS TITLE ONLINE, 2006. http://etd.lib.umt.edu/theses/available/etd-03292007-102153/.

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44

Elk, Michael. „A Survey of Plant Root Extracellular Enzyme Activity in Native and Invasive Exotic Plants of Oak Openings“. University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1271364000.

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45

Blaney, Christopher Sean. „Comparative seed ecology of native and alien plants of open uplands“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ45885.pdf.

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46

Wynn, Jules. „Ecophysiological responses of native plants to growth in elevated CO←2“. Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267073.

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47

Rojas, Maria J. „Study of Plants Used Against Infections by California Native American Tribes“. DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2248.

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The objectives of this research were to evaluate the antibacterial activity and to determine the chemical composition of a list of medicinal plants used by Native Americans in California. Artemisia californica, Mimulus aurantiacus, Equisetum telmateia, Equisetum hyemale, and Marah fabacea were selected from a list of plants reported as having been used for ailments related to infections by tribes located in California. The extracts obtained through steam distillation from E. telmateia, E. hyemale and M. fabacea were assayed for in vitro antibacterial activity against 16 Gram-negative and 6 Gram-positive bacteria using disk diffusion assays and measuring the diameters of inhibition zones. E. telmateia showed the most promising antibacterial activity. The extracts from A. californica, M. aurantiacus and E. telmateia were analyzed for chemical composition, finding eucalyptol, thujone, eugenol, caryophyllene, germacrene D, and propanal as some of the secondary metabolites identified using GC-MS. Our results suggest that E. telmateia can be a potential source for novel antimicrobials against pathogenic bacteria.
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Blackson, Meghan Michelle. „Designing Roofs to Support Native Plants in the Great Lakes Region“. Kent State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=kent1619702653699892.

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49

Tamimi, Laila N. „The Use of Native Hawaiian Plants by Landscape Architects in Hawaii“. Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/31801.

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Hawaii has lost significant numbers of native flora and fauna resulting from introduced grazing animals, invasive flora, fire and a loss of habitat due to urbanization and agricultural use. Scientists believe that protecting these plants can be achieved by eliminating or reducing threats to native ecosystems, generating and maintaining genetic back-up and by outplanting. The Endangered Species Act and Acts 73 and 236 (State Law requiring the use of native Hawaiian plants in State funded projects) were created to protect rare and common native plants and increase the populations and public awareness of these plants. Two surveys and case studies were conducted to determine if and why landscape architects in Hawaii use native Hawaiian plants in their planting plans and to compare use in the public and private sectors. The findings show that the majority of landscape architects use native Hawaiian plants in their planting plans as a result of Acts 73 and 236. Unavailable plant material, unestablished maintenance requirements and difficulty selecting plants for a site are constraints faced by landscape architects that may inhibit their use of native plants.
Master of Landscape Architecture
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50

Ondrasik, William E. „Evaluation of Native Ohio Plants to Lead and Zinc Contaminated Soils“. Youngstown State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1246554091.

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