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Dissertations / Theses on the topic 'Bird density'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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1

Sergio, Fabrizio. "Factors affecting habitat selection,density and productivity in the black kite (Milvus migrans)." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269482.

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2

Munyenyembe, F. E., and n/a. "Bird density and species richness in suburban Canberra, Australia : relationships with street vegetation, age of suburb and distance from bird source areas of native vegetation." University of Canberra. Applied Science, 1985. http://erl.canberra.edu.au./public/adt-AUC20061027.115542.

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3

Hulme, Mark F. "The density and diversity of birds on farmland in West Africa." Thesis, St Andrews, 2007. http://hdl.handle.net/10023/424.

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4

Johnston, Christine Ninette. "Ecological and Behavioral Impacts of Snag Density on Cavity-Nesting Birds in the Oak Savanna." Bowling Green State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1180531111.

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5

Wenzel, Dawn Nicole. "Comparison of avian species diversity and densities on non-mined and reclaimed surface-mined land in east-central Texas." Thesis, Texas A&M University, 2006. http://hdl.handle.net/1969.1/4202.

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Surface mining often changes the native landscape and vegetation of an area. Reclamation is used to counter this change, with the goal of restoring the land to its original pre-mined state. The process of reclamation creates early successional-stage lands, such as grasslands, shrublands, and wetlands, attracting new plant and animal species to the area. I compared avian species density (number of individuals/ha), diversity (H'), and richness (number of species/ha) on reclaimed and non-mined lands at TXU's Big Brown Mine in Fairfield, Texas. I also compared my results to those of a previous stu

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6

Coetzee, Bernard W. T. "Implications of global change for important bird areas in South Africa." Diss., University of Pretoria, 2008. http://hdl.handle.net/2263/29591.

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The Important Bird Areas (IBAs) network of BirdLife International aims to identify sites that are essential for the long-term conservation of the world’s avifauna. A number of global change events have the potential to negatively affect, either directly or indirectly, most bird species, biodiversity in general and associated ecological processes in these areas identified as IBAs. To assist conservation decisions, I assessed a suite of ten landscape scale anthropogenic pressures to 115 Important Bird Areas (IBAs) in South Africa, both those currently placing pressures on IBAs and those that con

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7

Hjernquist, Mårten B. "Living in a Variable Environment : Reproductive Decisions in Wild Bird Populations." Doctoral thesis, Uppsala universitet, Zooekologi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9464.

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In nature, environments are often variable and heterogeneous influencing ecological and evolutionary processes. This thesis focus on how animals interact with their environment and how that affects the reproductive decisions they make. Using empirical data collected from wild collared flycatcher populations, experiments and molecular approaches I try to unveil some of these relationships and the evolutionary, ecological and conservation implications of these findings are discussed. Firstly, collared flycatchers were shown to use breeding densities of their own and other species using similar r

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8

Aberle, Matthew Allen. "Effects of Bird Feeder Density on the Behavior and Ecology of a Feeder-Dependent Songbird: Patterns and Implications for Disease Transmission." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/85045.

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Anthropogenic resource provisioning of wildlife has increasingly been hypothesized to alter pathogen spread. Although bird feeding is the most widespread form of intentional wildlife provisioning, we know relatively little about how the degree of anthropogenic feeding at a site impacts wild birds in ways relevant to disease transmission. We manipulated the density of bird feeders (low versus high) available at otherwise similar sites and tracked the local abundance, body condition (scaled-mass index), feeding behavior, and movement across the landscape in wild house finches (Haemorhous mexican

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9

Doxa, Aggeliki. "Complex population dynamics in a changing environment : the impact of density dependence and environmental factors on the vital rates and dynamics of two long-lived bird species." Paris, Muséum national d'histoire naturelle, 2009. http://www.theses.fr/2009MNHN0001.

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Un des principaux enjeux actuels en dynamique des populations est de fournir des outils adaptés pour prédire efficacement l’impact des changements globaux sur les espèces. Les interactions entre les populations et leur environnement peuvent être complexes, et leurs effets sur la variation des paramètres démographiques peuvent être décalés dans le temps. Les modèles de projection du risque d’extinction des populations ou de leur capacité à s’adapter à des modifications rapides des conditions environnementales nécessitent donc d’incorporer ce type de complexité dans leur structure pour qu’ils so

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10

Catlin, Daniel H. "Population Dynamics of Piping Plovers (Charadrius melodus) on the Missouri River." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/27442.

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Habitat loss and predation are threatening many shorebird populations worldwide. While habitat preservation often is preferable, sometimes habitat needs to be restored or created in order to stave off immediate declines. The Great Plains population of piping plovers (Charadrius melodus) was listed as threatened in 1986, and habitat loss and predation appear to be limiting the growth of this population. On the Missouri River, piping plovers nest on sandbars, but the damming of the mainstem of the Missouri in the mid-twentieth century reduced the natural capacity of the Missouri River to crea

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11

Catlin, Daniel Herbert. "Population Dynamics of Piping Plovers (Charadrius melodus) on the Missouri River." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/27442.

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Habitat loss and predation are threatening many shorebird populations worldwide. While habitat preservation often is preferable, sometimes habitat needs to be restored or created in order to stave off immediate declines. The Great Plains population of piping plovers (Charadrius melodus) was listed as threatened in 1986, and habitat loss and predation appear to be limiting the growth of this population. On the Missouri River, piping plovers nest on sandbars, but the damming of the mainstem of the Missouri in the mid-twentieth century reduced the natural capacity of the Missouri River to crea

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12

Stroppel, David J. Ryan Mark R. Hubbard Mike. "Evaluation of patch-burn grazing on species richness and density of grassland birds." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6462.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 18, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Thesis advisor: Dr. Mark R. Ryan and Mike Hubbard. Includes bibliographical references.

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13

Abernathy, Lisa. "One Year Avian Survey of John U. Lloyd Beach State Park to Determine Population Density." NSUWorks, 2011. http://nsuworks.nova.edu/occ_stuetd/209.

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John U. Lloyd Beach State Park is a 125 hectare barrier island on the eastern edge of Broward County, Florida abutting the Intracoastal Waterway and Atlantic Ocean. The park provides recreational facilities for the public as well as housing Nova Southeastern University’s Oceanographic Center, a U.S. Coast Guard Station, U.S. Navy Facility, and park offices. The park is surrounded by growing infrastructure such as the Hollywood-Fort Lauderdale International Airport, Port Everglades, and the Florida Power and Light operational facility. John U. Lloyd Beach State Park was in need of a baseline su

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14

Freixa, Lídia Raquel Rocha. "Abundância e distribuição de aves de rapina noturnas no Parque Natural da Arrábida e Parque Natural Sintra-Cascais." Master's thesis, Universidade de Évora, 2015. http://hdl.handle.net/10174/17696.

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Atualmente assiste-se a um declínio generalizado da biodiversidade, em grande medida devido a alterações significativas no uso e ocupação do solo. Estudou-se a densidade e abundância de duas espécies de aves de rapina noturnas, Mocho-galego (Athene noctua) e Coruja-do-mato (Strix aluco) no Parque Natural da Arrábida e no Parque Natural de Sintra-Cascais durante o período de Janeiro a Junho de 2013 e estabeleceram-se associações entre variáveis ambientais e a presença das espécies nestas áreas. A diversidade da paisagem revelou-se uma variável ambiental altamente significativa para ambas as esp

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15

Bernardo, Christine Steiner São. "Abundância, densidade e tamanho populacional de aves e mamíferos cinegéticos no Parque Estadual Ilha do Cardoso, SP, Brasil." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-05012005-154205/.

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O principal objetivo desse trabalho foi obter o índice de abundância, a densidade e o tamanho populacional de mamíferos e aves cinegéticos (preferencialmente caçados) na Mata Atlântica do Parque Estadual Ilha do Cardoso (PEIC), através do método de transecções lineares. Mapas de ocorrência das espécies foram gerados, bem como foram testadas relações entre estrutura da vegetação e variáveis antrópicas com a abundância e ocorrência das espécies. Foram percorridos 273,05 km em 13 trilhas distribuídas por várias regiões do PEIC. Dentre as aves cinegéticas com maior densidade destacaram-se o uru Od

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16

Carvalho, Arivaldo Cutrim. "Interação de glicina com grafeno: uma abordagem de modelagem molecular." Universidade Federal do Maranhão, 2010. http://tedebc.ufma.br:8080/jspui/handle/tede/718.

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Made available in DSpace on 2016-08-18T18:19:27Z (GMT). No. of bitstreams: 1 Arivaldo Cutrim Carvalho.pdf: 4594687 bytes, checksum: c5792781a97f8174ae6dcd9a0bfbd359 (MD5) Previous issue date: 2010-10-21<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>With the aim of the development of new nanodevices, there is great interest in understand the electronic properties of nanostructured materials. Above all, how to modify the electronic properties of nanostructures already well known in a controlled manner. With this goal, many methodologies and experiments has been develope

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17

Marques, Renato Matos. "Diagnóstico das populações de aves e mamíferos cinegéticos do Parque Estadual da Serra do Mar, SP, Brasil." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-20062005-163545/.

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O presente trabalho avaliou não somente a abundância e densidade de mamíferos e aves cinegéticas na área do Parque Estadual da Serra do Mar (PESM), mas também identificou fatores que influenciaram a ocorrência e distribuição destas espécies. O PESM tem ao todo 3.150 km2 e é o maior remanescente de florestas contínuas de Mata Atlântica no Brasil. Foram percorridos 633,55 km em 15 trilhas distribuídas em três núcleos do setor norte do PESM. Foram obtidas 184 visualizações, tendo sido registradas 11 espécies de mamíferos e 6 espécies de aves cinegéticas durante os censos, num total de 77 encontr

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18

Trönnberg, Filip. "Empirical evaluation of a Markovian model in a limit order market." Thesis, Uppsala universitet, Matematiska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-176726.

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A stochastic model for the dynamics of a limit order book is evaluated and tested on empirical data. Arrival of limit, market and cancellation orders are described in terms of a Markovian queuing system with exponentially distributed occurrences. In this model, several key quantities can be analytically calculated, such as the distribution of times between price moves, price volatility and the probability of an upward price move, all conditional on the state of the order book. We show that the exponential distribution poorly fits the occurrences of order book events and further show that littl

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19

Müller, Thomas. "Untersuchung des Zusammenhangs zwischen der Landschaftsstruktur und dem Vorkommen dreier Vogelarten." Bachelor's thesis, Hochschule für Technik und Wirtschaft Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:520-qucosa-211816.

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In dieser Arbeit wurde der Frage nachgegangen, inwieweit sich die Habitatansprüche von drei Brutvogelarten, der Offenlandart Feldlerche (Alauda arvensis), der Heckenart Neuntöter (Lanius collurio) und der Waldart Schwarzspecht (Dryocopus martius), mit Landschaftsstrukturmaßen darstellen lassen, und ob sich Landschaftsstrukturmaße für die Habitatmodellierung eignen. Basis für die Berechnung der Landschaftsstrukturmaße ist ein Flächenschema des IÖR-Monitors aus dem Jahr 2013, welches aus Daten des AFIS-ALKIS-ATKIS-Modells (AAA-Modells) aufgebaut wurde. Dieses Schema bietet redundanzfreie Flächen

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20

Pereira, Daniel Santiago. "Estudo do Potencial de Produção de Néctar da Jitirana Branca (Merremia Aegyptia) em Área de Caatinga no Sertão Central em Quixeramobim-Ce." Universidade Federal Rural do Semi-Árido, 2008. http://bdtd.ufersa.edu.br:80/tede/handle/tede/321.

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Made available in DSpace on 2016-08-15T20:30:57Z (GMT). No. of bitstreams: 1 DanielSP_DISSERT.pdf: 1561196 bytes, checksum: b284038c0016d3ae3285d101b795f237 (MD5) Previous issue date: 2008-07-25<br>Néctar; entomofauna; Merremia aegyptia<br>O objetivo deste trabalho foi o de investigar se os diferentes horários de coleta de néctar em áreas apícolas influenciam no volume, concentração de açúcar e açúcar total produzido por suas flores, no momento da antese, bem como verificar possíveis alterações nas características do néctar ao longo do tempo e discutir as conseqüências no potencial apícola d

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21

McCracken, Marti L. "Factors affecting bird counts and their influence on density estimates." Thesis, 1993. http://hdl.handle.net/1957/37264.

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Variable area surveys are used in large geographic regions to estimate the density of birds distributed over a region. If some birds go undetected, a measure of the effective area surveyed, the amount of area occupied by the birds detected, is needed. The effective area surveyed is determined by observational, biological, and environmental factors relating to detectability. It has been suggested that density estimates are inaccurate, and that it is risky to compare bird populations intraspecifically over time and space, since factors influencing bird counts will vary. There have been several c

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22

Marthy, William. "Scale- and trait dependent responses of bird communties to lowland rainforest restoration and frugivore-bird-seed interaction networks in Sumatra, Indonesia." Doctoral thesis, 2014. http://hdl.handle.net/11858/00-1735-0000-0022-5E1E-F.

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23

Ross, Derek J. "Bird call recognition with artificial neural networks, support vector machines, and kernel density estimation." 2006. http://hdl.handle.net/1993/20399.

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24

Coetzee, B. T. W. (Bernard Walter Thomas). "Implications of global change for important bird areas in South Africa." Diss., 2003. http://hdl.handle.net/2263/29591.

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The Important Bird Areas (IBAs) network of BirdLife International aims to identify sites that are essential for the long-term conservation of the world’s avifauna. A number of global change events have the potential to negatively affect, either directly or indirectly, most bird species, biodiversity in general and associated ecological processes in these areas identified as IBAs. To assist conservation decisions, I assessed a suite of ten landscape scale anthropogenic pressures to 115 Important Bird Areas (IBAs) in South Africa, both those currently placing pressures on IBAs and those that con

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25

Zeman, Vít. "Rozšíření a biotopové preference strnada zahradního v České republice." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-368053.

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The Ortolan Bunting (Emberiza hortulana) is a farmland bird species, whose population size has declined very sharply in recent decades, especia ll y in Western and Central European countries. The aim of our study in 2015 was to record where the last populations of this critically endangered species in the Czech Republic are located and also what habitat the species associated with. We examined nine areas (925 km2 in total). Two main areas of occurrence (surface mines in northern Bohemia and farmland landscape of Silesia) and two small isolated populations in central Bohemia were registered for

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26

Christie, Katie. "Linking salmon and birds : how salmon-derived nutrients influence the diet and density of birds on streams of the Pacific Northwest." 2005. http://hdl.handle.net/1828/647.

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27

Renfrew, Rosalind B. "The influence of patch and landscape characteristics on grassland passerine density, nest success, and predators in southwestern Wisconsin pastures." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.

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28

Muyemeki, Luckson. "Baseline assessment of the density and diversity of birds around Matimba and Medupi power station / Luckson Muyemeki." Thesis, 2015. http://hdl.handle.net/10394/16083.

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Bird populations are changing at unprecedented rates in response to human-induced changes to the global environment, and these rates of change are expected to accelerate over the coming decades. Changes in the levels of sulphur dioxide (SO2) in the atmosphere through emissions from power stations pose a potential threat to bird populations. However, avian response to SO2 pollution is poorly understood. Exploring the relationship between avian diversity and SO2 exposure levels will help in determining species sensitive to air pollution. This study seeks to understand the interactions between av

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29

Maas, Bea. "Birds, bats and arthropods in tropical agroforestry landscapes: Functional diversity, multitrophic interactions and crop yield." Doctoral thesis, 2013. http://hdl.handle.net/11858/00-1735-0000-0022-5E77-5.

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30

Müller, Thomas. "Untersuchung des Zusammenhangs zwischen der Landschaftsstruktur und dem Vorkommen dreier Vogelarten: eine GIS-gestützte Überprüfung der Ansprüche der Feldlerche Alauda arvensis, des Neuntöters Lanius collurio und des Schwarzspechts Dryocopus martius an die Landschaft." Bachelor's thesis, 2015. https://htw-dresden.qucosa.de/id/qucosa%3A23303.

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In dieser Arbeit wurde der Frage nachgegangen, inwieweit sich die Habitatansprüche von drei Brutvogelarten, der Offenlandart Feldlerche (Alauda arvensis), der Heckenart Neuntöter (Lanius collurio) und der Waldart Schwarzspecht (Dryocopus martius), mit Landschaftsstrukturmaßen darstellen lassen, und ob sich Landschaftsstrukturmaße für die Habitatmodellierung eignen. Basis für die Berechnung der Landschaftsstrukturmaße ist ein Flächenschema des IÖR-Monitors aus dem Jahr 2013, welches aus Daten des AFIS-ALKIS-ATKIS-Modells (AAA-Modells) aufgebaut wurde. Dieses Schema bietet redundanzfreie Flächen

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