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Dissertations / Theses on the topic 'Anthropogenic pressures'

Author: Grafiati

Published: 4 June 2021

Last updated: 24 July 2025

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1

Radinger, Johannes. "Modelling fish dispersal in catchments affected by multiple anthropogenic pressures." Doctoral thesis, Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, 2014. http://dx.doi.org/10.18452/17067.

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Die Besiedlung von Gewässern durch Fische, ist neben abiotischen Lebensraumbedingungen auch von der Erreichbarkeit d.h. von der art-spezifischen Ausbreitungsfähigkeit sowie von Wanderhindernissen abhängig. Der erste Teil dieser Arbeit bietet die erste umfangreiche quantitative Analyse von Ausbreitungsmustern und -distanzen von Flussfischen. Aus der Fachliteratur wurden 160 empirische Datensätze aus 71 wissenschaftlichen Studien zur Ausbreitung von 62 Fischarten in Flüssen extrahiert und an leptokurse Wahrscheinlichkeits-Dichte-Funktionen (Dispersal kernel) angepasst. Es konnte bei Fischpopula

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Besson, Marc. "Importance of metamorphosis in coral-reef fish larval recruitment facing anthropogenic pressures." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEP024/document.

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Le maintien et le renouvellement des populations de poissons coralliens dépendent en grande partie du recrutement larvaire, c’est-à-dire de l’installation des larves pélagiques dans les habitats récifaux adultes, et de leur survie après s’être métamorphosées en juvéniles. De plus en plus d’études révèlent que les changements de composition de l’eau, causés par le changement climatique et la pollution, peuvent altérer les capacités sensorielles des poissons coralliens, diminuant leurs aptitudes à localiser des habitats propices (maximisant leur croissance et diminuant leur mortalité) lors de l’

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Ma, Jia Ji Wei. "A geospatial methodology for assessing wetland vulnerability under anthropogenic pressures at a watershed scale." Diss., UMK access, 2006.

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Thesis (Ph. D.)--Dept. of Geosciences and School of Computing and Engineering. University of Missouri--Kansas City, 2006.<br>"A dissertation in geoscience and software architecture." Advisor: Wei Ji. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed Nov. 13, 2007. Includes bibliographical references (leaves 248-261). Online version of the print edition.

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Chiziane, Hércio Issac Patrício. "Analysis of morphometric attributes of benthic nematodes as descriptors of the different ecological conditions." Master's thesis, ISA/UL, 2018. http://hdl.handle.net/10400.5/17979.

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Mestrado em Gestão e Conservação dos Recursos Naturais - Instituto Superior de Agronomia / Universidade de Évora<br>Free-living nematodes have been and are continually considered excellent bioindicators by several authors. Their high structural and functional diversity makes them more diversified and numerically dominant in aquatic habitats, with a wide distribution ranging from untouched habitats to highly polluted habitats. This fact as called the attention of many researchers who in turn motivated and promoted their use in the evaluation of the quality of water bodies. Farther, studies show

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Holzwarth, Ingrid [Verfasser]. "Implications of direct anthropogenic pressures on dissolved oxygen dynamics in a well-mixed estuary / Ingrid Holzwarth." Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/116822912X/34.

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Freitas, Luís Guilherme Pereira Antunes. "Planeamento de restauro fluvial do Rio Alcoa." Master's thesis, ISA/UTL, 2012. http://hdl.handle.net/10400.5/5321.

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Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia<br>The European Union established a framework for Community action in the field of water policy. Considering the need for the natural resources protection and conservation, the Water Framework Directive 2000/60/EC Directive was adopted, involving the efforts of all Member States in the task of achieving good status for all waters, in which the aim of achieving good ecological state for natural ecosystems can be included. Within this context, the main objectives of this study are: the characterisation and quantification of the

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Eilers, Silke [Verfasser], Helmut [Akademischer Betreuer] Hillebrand, and Thomas [Akademischer Betreuer] Brey. "Analysis and assessment of cumulative effects of anthropogenic pressures on ecosystem components / Silke Eilers ; Helmut Hillebrand, Thomas Brey." Oldenburg : BIS der Universität Oldenburg, 2021. http://d-nb.info/123414896X/34.

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Rhodes, Monika, and n/a. "The Ecology and Conservation of the White-Striped Freetail Bat (Tadarida australis) in Urban Environments." Griffith University. Australian School of Environmental Studies, 2006. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20070314.114451.

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Of all anthropogenic pressures, urbanisation is one of the most damaging, and is expanding in its influence throughout the world. In Australia, 90% of the human population live in urban centres along the eastern seaboard. Before European settlement in the early 1800s, much of the Australia's East coast was dominated by forests. Many of the forest dependent fauna have had to adapt to forest fragmentation and habitat loss resulting from clearing for urbanisation. However, relatively few studies have investigated the impact of urbanisation on biodiversity. This is especially true for the remainin

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Mestre, Débora Jesuíno. "Planeamento de restauro de corredores fluviais na bacia do Rio Grande." Master's thesis, ISA, 2013. http://hdl.handle.net/10400.5/6470.

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Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia<br>According to the Water Framework Directive (WFD), which requires Member States to take measures in order to protect, enhance and restore the superficial water bodies, looking to attain a good water quality status, the work at hand aims at assessing the ecological status of the Rio Grande water bodies, by implementing the Predicted Ecological State methodology. This methodology allows the division of the fluvial ecosystem in sections with homogenous features, the identification of its degradation level through the meas

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Rhodes, Monika. "The Ecology and Conservation of the White-Striped Freetail Bat (Tadarida australis) in Urban Environments." Thesis, Griffith University, 2006. http://hdl.handle.net/10072/367292.

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Of all anthropogenic pressures, urbanisation is one of the most damaging, and is expanding in its influence throughout the world. In Australia, 90% of the human population live in urban centres along the eastern seaboard. Before European settlement in the early 1800s, much of the Australia's East coast was dominated by forests. Many of the forest dependent fauna have had to adapt to forest fragmentation and habitat loss resulting from clearing for urbanisation. However, relatively few studies have investigated the impact of urbanisation on biodiversity. This is especially true for the remainin

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Radinger, Johannes [Verfasser], Werner [Akademischer Betreuer] Kloas, Christian [Akademischer Betreuer] Wolter, and Andreas [Akademischer Betreuer] Melcher. "Modelling fish dispersal in catchments affected by multiple anthropogenic pressures / Johannes Radinger. Gutachter: Werner Kloas ; Christian Wolter ; Andreas Melcher." Berlin : Lebenswissenschaftliche Fakultät, 2014. http://d-nb.info/1063014131/34.

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Nyegaard, Marianne. "There be giants! The importance of taxonomic clarity of the large ocean sunfishes (genus Mola, Family Molidae) for assessing sunfish vulnerability to anthropogenic pressures." Thesis, Nyegaard, Marianne (2018) There be giants! The importance of taxonomic clarity of the large ocean sunfishes (genus Mola, Family Molidae) for assessing sunfish vulnerability to anthropogenic pressures. PhD thesis, Murdoch University, 2018. https://researchrepository.murdoch.edu.au/id/eprint/41666/.

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The study of ocean sunfishes has for decades been practically synonymous with the study of Mola mola, recently listed as ‘vulnerable’ on a global scale by the International Union for Conservation of Nature. The concerns are high levels of fisheries bycatch worldwide, however sunfish bycatch is rarely identified to species level anywhere, perhaps as a long legacy of taxonomic confusion in the sunfish taxonomy has rendered identification to species level challenging. This includes the Australian and New Zealand longline fisheries, where sunfishes are listed at “High Risk” due to data deficiency.

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Cruz, Barrón Magali de la. "Compartmentalization of class 1 integrons and IncP-1 plasmids in the Orne river (France), an aquatic ecosystem impacted by urban and industrial anthropogenic pressures." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0212/document.

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Les éléments génétiques mobiles (EGM) sont des structures génétiques fréquemment associées à la dissémination de gènes de résistance aux antibiotiques (GRA). Dans ce travail, nous avons utilisé deux EGM comme « proxies », les intégrons de classe 1 et les plasmides IncP-1, afin de mieux comprendre (i) le devenir possible des GRA une fois relargués dans un écosystème fluvial (l’Orne, France), ainsi que (ii) l’effet des pressions anthropiques sur leur persistance. À partir d'analyses de l'eau des rivières, nous avons pu montrer que les deux EGM ne se comportaient pas de la même manière. L'entrée

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Blanfuné, Aurélie. "Le changement global en Méditerranée Nord Occidentale : forêt de Cystoseires, de Sargasses, encorbellement à Lithophyllum et bloom d'Ostreopsis." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4024/document.

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Dans la plupart des mers et des océans, la zone littorale est dominée par de grandes Phaeophyceae (Laminariales et Fucales) qui jouent un rôle écologique majeur dans la structuration et le fonctionnement de l’écosystème (fourniture d’habitats, de nourri ture, de frayères et de nurseries pour de nombreuses espèces). En Méditerranée, ce sont les espèces de Fucales appartenant aux genres Cystoseira C. Agardh et Sargassum C. Agardh qui sont les principales espèces structurantes du stade climacique de la végétation photophile de la zone littorale (de la surface jusqu’à 70-80 m de profondeur dans le

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Daeden, Jonathan. "Analyse des pressions anthropiques sur l’environnement littoral européen et français." Thesis, La Rochelle, 2015. http://www.theses.fr/2015LAROS019/document.

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La gestion et la conservation des littoraux exigent la synthèse de données géographiques sur la répartition et l'intensité des activités humaines et sur le cumul de leurs impacts sur les écosystèmes côtiers marins et terrestres. Actuellement, à l’échelle du littoral européen ou français, peu d’études offrent une vision globale des risques sur les habitats terrestres et marins. Comment s’y répartissent les pressions humaines sur la biodiversité ? Comment mieux définir le système littoral et ainsi améliorer la gestion de ce territoire ? A l’échelle européenne, à l’aide de 24 pressions anthropiqu

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Mateo, Santos Maria. "Réponses adaptatives des anguilles tempérées à l’hétérogénéité environnementale : mécanismes évolutifs, menaces liées au changement global et conséquences pour la conservation." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0713/document.

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Le déclin mondial des anguilles tempérées est lié aux effets synergiques de multiples pressions anthropiques. Cependant, la complexité du cycle de vie des anguilles et leurs incroyables capacités d’adaptation font qu’il est très difficile de connaître le poids relatif de chacune des pressions. Les anguilles tempérées sont trois espèces catadromes qui ont de très grandes aires de répartition pendant leurs phases de croissance continentales. Leurs panmixies et les longues dérives larvaires passives sont des freins aux adaptations locales, cependant on observe des patrons spatiaux de traits d’his

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RELITTI, FEDERICA. "Carbon cycle in marine systems under different anthropogenic pressure." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2924760.

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During the past two centuries, human activities have greatly modified the exchange of carbon and nutrients between land, atmosphere, freshwater bodies, coastal zones and open ocean. This PhD thesis focuses on different aspects of carbon cycle, considering three case study for the evaluation of the effects of anthropogenic pressure and of the natural evolution of carbon cycle. The first case study focuses on anthropogenic impacts on contaminated coastal areas. These environments connect terrestrial and oceanic systems, and are highly subjected to anthropogenic pressure. An example of a contamin

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Launois, Lionel. "Impact des facteurs anthropiques sur les communautés piscicoles lentiques : vers l'élaboration d'un indice poisson." Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10044/document.

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L’ichtyofaune est encore peu utilisée en bioindication sur les plans d’eau, alors que la demande des gestionnaires est forte, notamment dans le contexte de la mise en œuvre de la Directive Cadre Européenne sur l’Eau. L’objectif de cette thèse est d’analyser la réponse de l’ichtyofaune à diverses pressions anthropiques, afin de définir des variables biologiques de bioindication et construire un indice rendant compte de l’état écologique des lacs naturels et des retenues français. Plusieurs questions sont successivement abordées.En première analyse, les possibilités de sélection de métriques rép

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Duval, Bastien. "Ecodynamics of trace metals and metalloids in Pyrenean lakes in relation to climate change and anthropogenic pressure." Thesis, Pau, 2020. http://www.theses.fr/2020PAUU3046.

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La gestion et la conservation des lacs de haute montagne Pyrénéens dans le contexte actuel du changement climatique et de l’augmentation de la pression anthropique nécessitent une connaissance approfondie de leur fonctionnement biogéochimique. Dans cette thèse, cinq campagnes d’échantillonnage ont été réalisées (2017-2019) dans plus de 20 lacs alpins. L’analyse d’échantillons d’eau nous a permis d’étudier les teneurs, les profils en profondeurs, la répartition géographique, et les variations saisonnières de nombreuses caractéristiques physico-chimiques et biogéochimiques. Le cycle du dioxyde d

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Galindo, Romero Marta. "Spatial Variations in the Acoustic Peak Pressure of Impulsive Low Frequency Anthropogenic Signals in Underwater Marine Environments." Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/59661.

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A method to predict spatial variations in the peak pressure level of impulsive low frequency anthropogenic signal propagating in marine environments is presented. The method is based on the correlation between the peak pressure level and the sound exposure level, and the application of extreme value theory to estimate fluctuations of the peak pressure around its mean value in varying ocean environments. The method was examined using signals from offshore seismic surveys and pile driving.

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Гусєва, Аліна Віталіївна. "A complex assessment of the ecological state of the city of Kherson by bioindication method." Thesis, Національний авіаційний університет, 2020. http://er.nau.edu.ua/handle/NAU/43589.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат у 2019-2020 навчальному році". Керівник проекту: доцент кафедри екології, к.т.н., Радомська Маргарита Мирославівна<br>Object of research: change in the composition of atmospheric air under the influence of anthropogenic activity Subject of research: the level of air pollution Aim оf research: to assess the ecological state of the city of Kherson, to estimate the anthropogenic load on the city using bioindication methods. Methods of research – information search, a

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Гусєва, Аліна Віталіївна. "A complex assessment of the ecological state of the city of Kherson by bioindication method." Thesis, Національний авіаційний університет, 2020. https://er.nau.edu.ua/handle/NAU/49653.

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Робота публікується згідно наказу ректора від 21.01.2020 р. №008/од "Про перевірку кваліфікаційних робіт на академічний плагіат у 2019-2020 навчальному році". Керівник проекту: доцент кафедри екології, к.т.н., Радомська Маргарита Мирославівна<br>Object of research: change in the composition of atmospheric air under the influence of anthropogenic activity Subject of research: the level of air pollution Aim оf research: to assess the ecological state of the city of Kherson, to estimate the anthropogenic load on the city using bioindication methods. Methods of research – information search, a

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PATELLI, MARTINA. "ZOOPLANKTONIC POPULATION DYNAMICS AND PELAGIC FOOD WEBS IN THE DEEPEST SUBALPINE LAKES RELATED TO ANTHROPOGENIC PRESSURE AND CLIMATE CHANGE." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2020. http://hdl.handle.net/10281/262346.

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Il cambiamento climatico è considerato una delle minacce più gravi per la terra e gli ecosistemi acquatici e cresce la preoccupazione per gli effetti che il riscaldamento globale può avere sulle comunità biologiche. Negli ultimi anni, diversi studi hanno evidenziato la sensibilità dei corpi idrici alle fluttuazioni climatiche. Gli organismi zooplanctonici, caratterizzati da piccole dimensioni e rapido ciclo riproduttivo, sono sensibili ai cambiamenti ambientali. Inoltre, rappresentano dei componenti chiave delle catene trofiche acquatiche, collegando i produttori primari ai grandi consumatori

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Bouvais, Pierre. "Influence of increased sediment exposure on suspension-feeder assemblages in a temperate seagrass meadow." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2016. https://ro.ecu.edu.au/theses/1814.

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The impact of increased sediment exposure on coastal marine ecosystems is one of the most important contemporary environmental issues. Sediment exposure is defined as the concentrations of sediment particles suspended in the water column and the amount of sediment depositing on the seabed. In addition to natural events, such as land erosion, rainfall, and tidal currents, anthropogenic activities such as land use, road building, logging, mining, port maintenance and dredging, contribute to the discharge of a great amount of sediment in the water column. As sessile suspension-feeder assemblages

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Dos, Santos Abade Leandro. "Examining the spatial occurrence of carnivores across a gradient of anthropogenic pressure in southern Tanzania, with a focus on the Ruaha landscape and adjacent areas." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:b990940d-c823-4be4-b7ec-abc76d83572e.

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Tanzania's Ruaha landscape harbours some of the most important carnivore population strongholds in East Africa. However, ongoing human-induced changes of natural habitat expose these carnivore populations to increased anthropogenic pressure, even within protected areas. Such habitat changes can disrupt carnivore distribution and species interactions, which can be detrimental for species conservation. Yet, there is limited understanding about how anthropogenic-related variables influence carnivore occurrence and interspecific interactions in this landscape, which hinders the development of stra

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Lootvoet, Amélie. "Le rôle du comportement dans la vulnérabilité aux pressions anthropiques et à l'extinction chez les Primates." Thesis, Paris, AgroParisTech, 2014. http://www.theses.fr/2014AGPT0080.

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Depuis quelques dizaines d’années, un intérêt croissant s’est développé pour la protection des espèces et la compréhension des mécanismes qui les conduisent à l’extinction. Actuellement, les causes d’extinction sont pour la grande majorité d’origine anthropique, mais un certain nombre de facteurs intrinsèques, propres à chaque espèce, peuvent interagir avec ces pressions anthropiques, pour aboutir au risque d’extinction. De nombreuses études ont mis en évidence l’impact des traits d’histoires de vie et des caractéristiques écologiques dans la vulnérabilité des espèces à l’extinction, mais très

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Singh, S. K. (Sujeet Kumar). "Conservation genetics of the Bengal tiger (Panthera tigris tigris) in India." Doctoral thesis, Oulun yliopisto, 2017. http://urn.fi/urn:isbn:9789526215662.

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Abstract Tigers are endangered in the wild and face increasing threats from habitat loss and fragmentation. The majority of their range occurs in the Indian subcontinent, which is therefore a critical area for tiger conservation. Bengal tigers are distributed across many small protected areas in India. Two important Bengal tiger landscapes — Terai Arc Landscape (TAL) and Sundarbans in India were lacking in basic genetic information and needed to address the impact of anthropogenic pressure and climate change on their genetic makeup in order to identify conservation units. Therefore, I em

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Becquet, Vanessa. "Evaluation des capacités adaptatives du bivalve Macoma balthica (L.) dans un contexte de changement global : analyse comparée des processus neutres et soumis à sélection." Phd thesis, Université de La Rochelle, 2011. http://tel.archives-ouvertes.fr/tel-00591636.

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L'aire de distribution des espèces est conditionnée à la fois par des facteurs biotiques et abiotiques et ses frontières dépendent généralement des limites physiologiques de l'espèce. Ainsi, en bordure d'aire de répartition, les populations se caractérisent par une diversité génétique moindre ainsi qu'une forte différentiation génétique et leur existence dépend d'un équilibre fragile entre événements de colonisation et d'extinction.Depuis les années 1970, l'augmentation et l'accélération des pressions anthropiques exercées sur les écosystèmes bouleversent ces équilibres et des modifications de

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Gage, Karla Leigh. "EFFECTS OF ANTHROPOGENIC SELECTION PRESSURE ON THE EVOLUTION OF A COMMON AGRICULTURAL WEED: DOES ADAPTATION COME WITH A DETECTABLE COST? A STUDY OF GLYPHOSATE-RESISTANT (GR) AND -SUSCEPTIBLE (GS) BIOTYPES OF Conyza canadensis." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/dissertations/677.

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As the acreage of glyphosate-resistant (GR) cropping systems increases, so does the occurrence of herbicide-resistant weeds in the landscape. Biotypes of GR Conyza canadensis were first observed in Delaware, USA, in 2000. Since the first documentation of GR C. canadensis, there have been many instances of independent evolution of GR C. canadensis biotypes. The ecology of GR C. canadensis and any potential fitness consequences of GR trait are still unknown. If there is no fitness cost or a fitness increase associated with the GR trait, GR C. canadensis may increase in prevalence in the land

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Iborra, Laura. "Réponses des communautés ichtyologiques face aux pressions anthropiques locales dans un contexte de changement climatique." Electronic Thesis or Diss., Aix-Marseille, 2022. http://www.theses.fr/2022AIXM0503.

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La mer Méditerranée abrite une biodiversité marine importante avec un fort taux d’endémisme. Les poissons représentent 684 espèces dont 9,2 % sont endémiques. Outre le rôle nécessaire des poissons au sein des écosystèmes marins, les sociétés humaines bénéficient également de nombreux services écosystémiques générés par les populations ichtyologiques. Cependant, la biodiversité et le fonctionnement des écosystèmes côtiers méditerranéens, sont parmi les plus touchés à l’échelle mondiale en raison de pressions anthropiques croissantes. Contrairement à la dynamique liée au changement global, les p

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Soofi, Mahmood [Verfasser], Matthias [Akademischer Betreuer] Waltert, Niko [Gutachter] Balkenhol, Michael [Gutachter] Mühlenberg, and Eckhard W. [Gutachter] Heymann. "Effects of anthropogenic pressure on large mammal species in the Hyrcanian forest, Iran : Effects of poaching, logging and livestock grazing on large mammals / Mahmood Soofi ; Gutachter: Niko Balkenhol, Michael Mühlenberg, Eckhard W. Heymann ; Betreuer: Matthias Waltert." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2018. http://d-nb.info/1151398942/34.

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Machado, Fernando Henrique. "Proposição de indicadores de segurança hídrica : seleção, validação e aplicação na bacia hidrográfica do rio Jundiaí-Mirim, Jundiaí - SP, Brasil /." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/153669.

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Бояр, Андрій Олексійович, та Andrii O. Boiar. "Територіальна організація еколого-економічного комплексу Волинської області". Diss., Волинський державний університет імені Лесі Українки, 2003. http://evnuir.vnu.edu.ua/handle/123456789/13674.

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Систематизовано і поглиблено теоретико-методичні основи дослідження територіальної організації та комплексно-пропорційного розвитку еколого-економічного комплексу адміністративної області, зокрема уточнено поняття “еколого-економічний комплекс”, обґрунтовано категорії “територіальна організація еколого-економічного комплексу”, “еколого-економічна конверсія господарства”, сформульовано принципи та фактори територіальної організації еколого-економічного комплексу мезорегіону. Запропоновано п’ятисферну структуру еколого-економічного комплексу адміністративної області, зокрема виділено й обґрунтов

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Jeanneau, Laurent. "Approche moléculaire quantitative appliquée à l'étude du transfert de micropolluants organiques à la confluence entre la Fensch et la Moselle (France)." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2007. http://tel.archives-ouvertes.fr/tel-00221452.

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Dans le cadre des objectifs définis par la Directive Cadre sur l'Eau, ce travail de thèse porte sur la quantification du transfert de micropolluants organiques à la confluence entre la Fensch et la Moselle. Une nouvelle méthodologie a été développée pour déterminer les niveaux d'anthropisation dans les matrices environnementales. Basée sur la quantification exhaustive des marqueurs moléculaires, cette approche permet de comparer les apports naturels et anthropiques et de différencier les apports anthropiques selon leurs origines (combustion, pétrogénétique, eaux usées). Elle est parfaitement a

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Laço, José Maria Serpa. "Rivers as routes for the spread of antibiotic resistance: role of anthropogenic pressures and risks to Human health." Master's thesis, 2020. http://hdl.handle.net/10316/92611.

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Dissertação de Mestrado em Bioquímica apresentada à Faculdade de Ciências e Tecnologia<br>A resistência a antibióticos é um problema crescente a nível mundial associado ao uso abusivo de antibióticos tanto em humanos como animais. Enterobacteriaceae resistentes a cefalosporinas de 3ª geração geram grande preocupação, dado que são fármacos de primeira linha utilizados para tratar infeções causadas por estes agentes infeciosos. A resistência a este tipo de antibióticos é mediada por beta-lactamases de espectro alargado (ESBLs), sendo as CTX-M as mais prevalentes a nível mundial. O rio Lis é um r

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Teixeira, Marco José Neto. "Biomonitoring of Ferreira and Sousa rivers using diatoms: comparison between morphological and molecular approaches." Master's thesis, 2021. http://hdl.handle.net/10773/30712.

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Official monitoring programs implemented by the Portuguese Environmental Agency (APA), do not fully survey all streams and rivers due to their nationalwide coverage, budget, and practical limitations. Two rivers in the north of Portugal, the Sousa and Ferreira rivers, with a recent past of different types of pollution and that run over areas with a high degree of alteration and dense population, were analyzed ecologically based on biological (diatom communities), physicochemical, and hydromorphological data. Diatoms are excellent ecological indicators of water quality. They are broadly d

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Garcês, Andreia Manuela Vieira. "The impact of anthropogenic pressures on the mortality of wild animals in northern Portugal: a contribute to wild fauna preservation." Doctoral thesis, 2020. http://hdl.handle.net/10348/10352.

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Original thesis presented by Andreia Manuela Vieira Garcês at the University of Trás-osMontes and Alto Douro, to obtain the doctor’s degree on Veterinary Science – Biomedical Sciences.<br>Nas últimas décadas, a população humana cresceu exponencialmente e quase três quartos da terra sem gelo são agora dominados por biomas antropogénicos. A presença e A atividade humana provocaram alterações nos ecossistemas, levando à sua destruição ou fragmentação. Estas mudanças têm enormes consequências negativas para as populações selvagens, direta e indiretamente, que em um estadio final podem levar à comp

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Araújo, Susana Manso. "Emergence and dissemination of antibiotic resistance in the environment: origin of resistance genes and role of human activities." Doctoral thesis, 2021. http://hdl.handle.net/10773/32778.

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Resistance to antibiotics is a rising concern in respect to community and personal health, health-access social discrepancy and the future of the natural world. This work aimed to understand the role of environmental bacteria as the origin of the genetic determinants of antibiotic resistance (AR), as well as to explore the impact of anthropogenic pressures on the evolution and spread of AR. Shewanella’s genus role as progenitors and reservoir of AR genes was assessed through the analysis of a collection of environmental isolates and genomes of this genus deposited in public databases.

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Voerman, Sofietje Emma. "The spread of the native macroalga Caulerpa filiformis." Thesis, 2017. http://hdl.handle.net/10453/116915.

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University of Technology Sydney. Faculty of Science.<br>Marine coastal systems are threatened by a wide range of anthropogenic pressures. Of particular concern are increased sediment and nutrient runoff. Moreover, hotspots of anthropogenic pressures are also where invasive species tend to be. The spread of invaders can directly translate to a loss of biodiversity and associated ecosystem services. There is a growing awareness that the spread of native species can have similar large impacts on biodiversity and ecosystem function to their famous non-native counterpart. Yet the how, when and why

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Lizcano, Javier. "Red Sea Acropora hemprichii Bacterial Population Dynamics under Adverse Anthropogenic Conditions." Thesis, 2012. http://hdl.handle.net/10754/244871.

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Reef-building corals are cornerstones of life in the oceans. Understanding their interactions with microorganisms and their surrounding physicochemical conditions is important to comprehend reef functioning and ultimately protect coral reef ecosystems. Corals associate with a complex and specific array of microorganisms that supposedly affect their physiology and therefore can significantly determine the condition of a coral ecosystem. As environmental conditions may shape bacterial diversity and ecology in the coral symbiosis, ecosystem changes might have unfavorable consequences for the holo

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Soofi, Mahmood. "Effects of anthropogenic pressure on large mammal species in the Hyrcanian forest, Iran." Doctoral thesis, 2017. http://hdl.handle.net/11858/00-1735-0000-002E-E332-C.

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Teixeira, Zara Fani Gonçalves. "Resilience to land use induced impacts." Doctoral thesis, 2016. http://hdl.handle.net/10316/29520.

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Tese de doutoramento em Biociência, na especialidade de Ecologia, apresentada ao Departamento de Ciências da Vida da Faculdade de Ciências e Tecnologia da Universidade de Coimbra<br>A Directiva-Quadro da Água reforça o papel dos usos do solo na avaliação da qualidade da água, mas a utilização de dados de ocupação do solo, no que respeita a águas de superfície, restringe-se à estimativa dos padrões de uso do solo para a identificação de pressões provenientes de fontes de poluição difusas. O principal objetivo deste estudo é identificar especificidades da ocupação dos usos do solo na avaliação

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Proulx, Bruno. "Utilisation de l’habitat et pressions anthropiques sur une population de rorquals à bosse (Megaptera novaeangliae) de Guadeloupe par suivi terrestre." Thèse, 2014. http://hdl.handle.net/1866/11887.

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Le sanctuaire Agoa est une aire marine protégée dans la zone économique exclusive (ZEE) des Antilles françaises qui fut créée en 2010 pour la conservation des mammifères marins et de leurs habitats. Il est connu que le rorqual à bosse fréquente les eaux des Antilles de décembre à mai pour la reproduction et la mise bas. Par contre, peu d’information existe sur l’abondance, le comportement, la distribution et les pressions anthropiques sur cette espèce aux Antilles et encore moins dans le sanctuaire. Cette maîtrise s’intéresse principalement à connaître cette espèce dans un secteur précis de ce

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