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Dissertations / Theses on the topic 'Forest tree cover'

Author: Grafiati

Published: 7 September 2021

Last updated: 29 July 2025

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1

Axelsson, Robert. "Forest policy, continuous tree cover forest and uneven-aged forest management in Sweden's boreal forest /." Uppsala : Institutionen för skogens produkter, Sveriges lantbruksuniversitet (SLU), 2008. http://epsilon.slu.se/10947312.pdf.

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2

Allen, Elizabeth A. "Seed banks of pinyon-juniper woodlands the effects of tree cover and prescribed burn /." abstract and full text PDF (free order & download UNR users only), 2006. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1433416.

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3

Holloway, Jacinta. "Extending decision tree methods for the analysis of remotely sensed images." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/207763/1/Jacinta_Holloway_Thesis.pdf.

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One UN Sustainable Development Goal focuses on monitoring the presence, growth, and loss of forests. The cost of tracking progress towards this goal is often prohibitive. Satellite images provide an opportunity to use free data for environmental monitoring. However, these images have missing data due to cloud cover, particularly in the tropics. In this thesis I introduce fast and accurate new statistical methods to fill these data gaps. I create spatial and stochastic extensions of decision tree machine learning methods for interpolating missing data. I illustrate these methods with case studi

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4

Lemessa, Debissa. "Pests and pest controlling organisms across tropical agroecological landscapes in relation to forest and tree-cover." Doctoral thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-102849.

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A major challenge in agroecosystems is how to manage the systems so that it reduces crop pests and enhances natural pest control. This thesis investigates patterns of crop pests and top-down effects of birds and arthropod predators in relation to land-use composition across spatial scales. In paper (I) I examined the crop distribution and land-use types in relation to the crop raiding patterns in 15 transectsin sites close to and far from forests along with a questionnaire survey at household level. I found severe crop raiding close to forests, but it had no impact on crop composition growing

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5

Veatch, William Curtis. "Quantifying the Effects of Forest Canopy Cover on Net Snow Accumulation at a Continental, Mid-Latitude Site, Valles Caldera National Preserve, NM, USA." Thesis, The University of Arizona, 2008. http://hdl.handle.net/10150/193352.

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Although forest properties are known to influence snowpack accumulation and spring runoff, the processes underlying the impacts of forest canopy cover on the input of snowmelt to the catchment remain poorly characterized. In this study I show that throughfall and canopy shading can combine to result in maximal snowpacks in forests of moderate canopy density. Snow depth and density data taken shortly before spring melt in the Jemez Mountains of New Mexico show strong correlation between forest canopy density and snow water equivalent, with maximal snow accumulation in forests with density bet

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6

Ramsey, Jeff. "Tree Canopy Cover and Potential in Portland, OR: A Spatial Analysis of the Urban Forest and Capacity for Growth." PDXScholar, 2019. https://pdxscholar.library.pdx.edu/open_access_etds/5110.

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Urban forests have positive impacts on human and ecosystem health, reduce stress on aging stormwater infrastructure, increase property values, and reduce energy consumption. The scale of these benefits ranges from the hyper-local to the global. While the benefits of urban forests can extend well beyond the boundaries of cities, they often do not reach all residents of the city equally. Urban forest policies do not adequately address environmental equity or employ planting strategies with knowledge of the social and political factors that determine the spatial variations of tree canopy extent i

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7

Landry, Shawn. "Connecting Pixels to People: Management Agents and Social-ecological Determinants of Changes to Street Tree Distributions." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4715.

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Street trees are an important component of the urban forest that can provide direct and indirect benefits to social and ecological sustainability in cities. Temporal and spatial interactions between human and non-human management agents determine the distribution and health of street tree populations in urban areas. This dissertation seeks to enhance our understanding of the spatial patterns and processes affecting street trees by investigating the agents and social-ecological determinants of changes to street tree distributions in urban residential neighborhoods. The research was guided by th

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8

Karlson, Martin. "Remote Sensing of Woodland Structure and Composition in the Sudano-Sahelian zone : Application of WorldView-2 and Landsat 8." Doctoral thesis, Linköpings universitet, Tema Miljöförändring, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-121536.

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Woodlands constitute the subsistence base of the majority of people in the Sudano-Sahelian zone (SSZ), but low availability of in situ data on vegetation structure and composition hampers research and monitoring. This thesis explores the utility of remote sensing for mapping and analysing vegetation, primarily trees, in the SSZ. A comprehensive literature review was first conducted to describe how the application of remote sensing has developed in the SSZ between 1975 and 2014, and to identify important research gaps. Based on the gaps identified in the literature review, the capabilities of t

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9

Liang, Chun Xia. "Can planting trees make it rain?: the impact of trees on precipitation through land-atmosphere feedback." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/11686.

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Land surface atmosphere feedback is the interaction between land and atmosphere. Three studies have been conducted to investigate the vegetation-rainfall feedback. The first study is to detect the signal of land cover change from rainfall data in two regions in the Murray Darling Basin (MDB) with known land surface intervention. A semi-parametric regression model and a regression model with non-parametric step trend test are applied to identify changes in rainfall data and correlate these changes to land cover intervention. Both methods have identified some rainfall changes in the Snowy Mounta

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10

Kimball, Pulelehua L. "Urban Tree Canopy Assessments in the Chesapeake Bay Watershed." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/48057.

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An urban tree canopy assessment (UTCA) is a new technology that can inform management decisions to optimize the economic, social and environmental benefits provided by urban forests. A UTCA uses remote sensing to create a comprehensive spatial snapshot of a locality's land cover, classified at a very fine scale (1 meter or less). Over the past decade, UTCAs have been conducted for numerous localities in the Chesapeake Bay watershed (CBW) as part of a strategy to enhance urban tree canopy (UTC) and reduce stormwater runoff that pollutes the Chesapeake Bay. Our research examined how local gover

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11

Dehlin, Helena. "Ecosystem functioning and plant-soil interactions in forests : influences of quality and diversity of resources /." Umeå : Dept. of Forest Vegetation Ecology, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200679.pdf.

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12

Olsson, Cecilia. "Amphibian and reptile distribution in forests adjacent to watercourses." Thesis, Karlstad University, Faculty of Social and Life Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-3301.

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<p>Worldwide amphibians and reptiles are declining with habitat fragmentation and destruction as the primary cause. Riparian areas are important for the herpetofauna, but as land is converted to agriculture or harvested for timber the areas are diminishing. The aim of this study was to examine amphibian and reptile abundance in relation to distance from water and in relation to habitat characteristics, foremost per cent deciduous trees. The survey was conducted during spring at six different locations, with continuous forest along streams or rivers, outside of Karlstad, Sweden. Animals were se

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13

Telionis, Pyrros A. "Lyme Disease and Forest Fragmentation in the Peridomestic Environment." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/99281.

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Over the last 20 years, Lyme disease has grown to become the most common vector-borne disease affecting Americans. Spread in the eastern U.S. primarily by the bite of Ixodes scapularis, the black-legged tick, the disease affects an estimated 329,000 Americans per year. Originally confined to New England, it has since spread across much of the east coast and has become endemic in Virginia. Since 2010 the state has averaged 1200 cases per year, with 200 annually in the New River Health District (NRHD), the location of our study. Efforts to geographically model Lyme disease primarily focus on

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14

Zou, Xinglong. "Assessing the impact of urban trees and land use/cover change on spatial-temporal variation of air pollutions over a metropolitan region in Shanghai." Thesis, The University of Sydney, 2019. https://hdl.handle.net/2123/21915.

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Shanghai has become one of the most developed cities in China with rapid economic growth, a large and increasing population and complex patterns of industry. Amongst other effects, these particular factors have led to considerable increases in energy consumption, transport needs and concomitant emissions of atmospheric pollutants. Over the past several decades, attempts to control air pollution have included reduction and relocation of local industries, upgrading and reforming energy generation, changes in transport systems, and improvements in management strategies of air pollution. These and

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15

Riley, Christopher B. "Quantifying the Ecosystem Services and Functions of Forests across Diverse Urban Landscapes." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574414361328737.

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16

Bousses, Philippe. "Etude de l'ensoleillement des nids de l'espèce Formica lugubris Zett (Hymenoptera, Formicidae) en forêts d'Epicéa, Sapin, Mélèze et Pin à crochet." Toulouse 3, 1988. http://www.theses.fr/1988TOU30250.

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En entomologie forestiere montagnarde, formica lugubris zett, assure pour une part importante l'equilibre biologique des forets. Elle constitue en outre un bio-indicateur de leur etat phytosanitaire. Ce travail evalue l'incidence du rayonnement solaire sur la formation des nids, leur developpement et leur abandon. Nous avons utilise la methode des hemispherophotographies en combinaison avec les heliogrammes correspondants aux coordonnees des zones etudiees: l'arc alpin (forets de meleze, epicea et sapin), et les pyrenees orientales (forets de pin a crochet). L'etude des nids de differentes con

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17

Favillier, Adrien. "Impacts du changement climatique sur l’activité des avalanches dans les Alpes : apports de la dendrogéomorphologie pour la reconstitution spatiotemporelle de l’activité des avalanches dans un contexte de changements environnementaux dans les hautes vallées du Guil et du Rhône Disentangling the impacts of exogenous disturbances on forest stands to assess multi-centennial tree-ring reconstructions of avalanche activity in the upper Goms Valley (Canton of Valais, Switzerland) Spatio-temporal maps of past avalanche events derived from tree-ring analysis: a case study in the Zermatt valley (Valais, Switzerland) Tree-ring reconstruction of snow avalanche activity: Does avalanche path selection matter? Non-stationarities induced by land-cover changes in dendrogeomorphic reconstructions of snow avalanche activity: Insights from the Queyras massif (French Alps) Complex signals in regional tree-ring reconstructions of snow avalanches: lessons from the Goms valley (Swiss alps) Impacts des fluctuations climatiques sur l’activité des avalanches dans le Queyras." Thesis, Université Clermont Auvergne‎ (2017-2020), 2019. http://theses.bu.uca.fr/nondiff/2019CLFAL024_FAVILLIER.pdf.

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Au 20ème siècle, les massifs montagneux, dont les Alpes, ont connu un réchauffement significatif avec une augmentation des températures deux fois plus importante que la moyenne mondiale. Un tel réchauffement altère les composantes de la cryosphère. Elle induit, par exemple, un passage des précipitations solides aux précipitations liquides, des phases de fonte des neiges plus fréquentes et plus intenses, ainsi qu’une forte diminution de la quantité de neige et une réduction de la durée de la couverture neigeuse. Aux horizons 2050–2100, les modèles climatiques prévoient que l'épaisseur du mantea

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18

Whalen, Kevin Christopher. "A map system to disseminate national science on forests for the creation of regional tree planting prioritization plans." Kent State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=kent1510664712622379.

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19

Nielsen, Michael Meinild. "Inferring Land Use from Remote Sensing Imagery : A context-based approach." Doctoral thesis, Stockholms universitet, Kulturgeografiska institutionen, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-103082.

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This doctoral thesis investigates the potential of classification methods based on spatial context to infer specific forms of land use from remote sensing data. The problem is that some types of land use are characterized by a complex configuration of land covers that traditional per-pixel based methods have problems classifying due to spectral heterogeneity. The problem of spectral heterogeneity is also present in classification of high resolution imagery. Two novel methods based on contextual information are evaluated, Spatial Relational Post-Classification (SRPC) and Window Independent Cont

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20

Cunha, Flaviane Rodrigues da. "Aplicação do programa i-Tree Hydro para avaliar os efeitos da cobertura arbórea na dinâmica hidrológica de uma bacia hidrográfica urbana." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-15032019-161655/.

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A urbanização acelerada e mal planejada pode ocasionar diversas alterações e consequências para o ambiente, como a sistemática impermeabilização do solo, que pode ocasionar aumento do escoamento superficial da água e redução do tempo de escoamento, gerando problemas como enchentes, alagamentos, aumento do risco de desastres naturais, entre outros. A criação de mais áreas verdes pode ser considerada uma alternativa adequada para reduzir esses fenômenos, frente à rápida e crescente expansão urbana. Como os benefícios hidrológicos das árvores em ambiente urbano ainda são pouco explorados por pesq

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21

Masetti, Masha. "Product Clustering e Machine Learning per il miglioramento dell'accuratezza della previsione della domanda: il caso Comer Industries S.p.A." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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I lunghi lead time della catena di fornitura cinese dell’azienda Comer Industries S.p.A la obbligano ad ordinare i materiali con sei mesi di anticipo, data in cui spesso i clienti non sono consapevoli dei quantitativi di materiale che necessiteranno. Al fine di rispondere ai clienti mantenendo l’alto livello di servizio garantito storicamente da Comer Industries, risulta essenziale ordinare il materiale basandosi sulle previsioni della domanda. Tuttavia, attualmente le previsioni non sono sufficientemente accurate. L’obiettivo di questa ricerca è individuare un possibile metodo per incrementa

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22

Kriska, David J. "Restoration of Black Oak (Quercus velutina) Sand Barrens via three different habitat management approaches." Cleveland State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=csu1506811044845704.

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23

Alvarez, Ivan André. "Qualidade do espaço verde urbano: uma proposta de índice de avaliação." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-22102004-165714/.

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O objetivo deste trabalho foi propor, entre os índices já existentes, um índice que avalie a qualidade da cobertura vegetal em relação à sua função ecológica, no meio urbano. Para a composição deste índice, compararam-se os métodos de amostragem aleatória simples e de amostragem estratificada de inventários da arborização de calçadas com o censo, com a finalidade de se escolher o melhor método de levantamento quali-quantitativo para árvores de calçada. Determinou-se o número de árvores por quilômetro, número total de árvores, Índice de Diversidade de Shannon (IDS) para árvores de calçada. Fora

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24

Nelson, Elizabeth Amber. "Climate Change in the Canadian Boreal Forest: The Effect of Warming, Frost Events, Cloud Cover and CO2 Fertilization on Conifer Tree Rings." Thesis, 2011. http://hdl.handle.net/1807/31880.

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Anthropogenic climate change is expected to dramatically affect boreal forests, not only through warming effects, but through changes in seasonal and diurnal temperature patterns, precipitation, cloud-cover, and direct effects of rising CO2. My doctoral research examines the impact of these changes on dominant boreal forest conifer species, using dendrochronological methods. Through my analysis of white spruce (Picea glauca) and lodgepole pine (Pinus contorta) tree rings across five Yukon Territory sites, I found that white spruce growth is showing growth declines in response to all three meas

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25

Santos, Diogo Gabriel Coutinho dos. "Effects of wildfire ashes from different plant coverages in aquatic life stages of amphibians." Master's thesis, 2021. http://hdl.handle.net/10773/31924.

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Climate change has led to a global increase of earth surface temperatures. This phenomenon triggered the increase of frequency and intensity of extreme events such as wildfires. Mediterranean countries are severely affected by these disturbances because of their especially dry summers. Wildfire situation in Portugal is especially critical, because besides the hot and dry summers its native forests have been replaced with monospecific plantations that facilitate wildfires. Wildfires, along with the ashes formed, may cause environmental impacts. Formation of the ashes is a process that converts

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26

Kukunda, Collins B. "Scale challenges in inventory of forests aided by remote sensing." Doctoral thesis, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0005-144E-E.

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27

Adnan, Muhammad. "Diversity and abundance of medicinal plants among different forest-use types of the Pakistani Himalaya." Doctoral thesis, 2012. http://hdl.handle.net/11858/00-1735-0000-0006-B150-C.

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28

Solichin, Solichin. "Enhanced Systems for measuring and monitoring REDD+: opportunities to improve the accuracy of emission factor and activity data in Indonesia." Phd thesis, 2017. http://hdl.handle.net/1885/129612.

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The importance of accurate measurement of forest biomass in Indonesia has been growing ever since climate change mitigation schemes, particularly the reduction of emissions from deforestation and forest degradation scheme (known as REDD+), were constitutionally accepted by the government of Indonesia. The need for an accurate system of historical and actual forest monitoring has also become more pronounced, as such a system would afford a better understanding of the role of forests in climate change and allow for the quantification of the impact of

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29

Αθανασόπουλος, Σταύρος. "Αποδοτικοί αλγόριθμοι για κατανομή ενέργειας σε ασύρματα δίκτυα". Thesis, 2009. http://nemertes.lis.upatras.gr/jspui/handle/10889/2102.

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Στην παρούσα διδακτορική διατριβή, ασχολούµαστε µε ζητήµατα που ανακύπτουν σε ασύρµατα δίκτυα επικοινωνίας, δηλ. δίκτυα που βασίζονται σε τηλεπικοινωνιακή υποδοµή όπως τα κυψελικά δίκτυα κινητής τηλεφωνίας, δίκτυα αυτόνοµων ασύρµατων εκποµπών όπως τα ασύρµατα δίκτυα τύπου ad hoc, κτλ. Τα ασύρµατα δίκτυα επικοινωνίας διαφόρων τύπων έχουν εξελιχθεί σηµαντικά τα τελευταία χρόνια. Ειδικότερα, τα ασύρµατα αδόµητα δίκτυα (ή αλλιώς ασύρµατα δίκτυα τύπου ad hoc) έχουν προσελκύσει το έντονο ενδιαφέρον της επιστηµονικής κοινότητας λόγω των πολλών εφαρµογών που έχουν κυρίως σε περιπτώσεις όπου δεν είναι

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Nyamari, Nicodemus Ontweka. "Impact of land cover changes on carbon stock trends in Kenya using free open data." Master's thesis, 2019. http://hdl.handle.net/10362/63945.

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Dissertation submitted in partial fulfilment of the requirements for the Degree of Master of Science in Geospatial Technologies<br>Terrestrial carbon stock estimates information has signi cant importance in planning decisions for amicable mitigation of global warming and climate change related disasters. However, conventional estimation methods are usually expensive and time demanding particularly on national or regional scales. Therefore, this study sought to estimate and analyze carbon stock changes in Kenya as a consequence of land cover change (LCC) using open data and software to pro

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