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Dissertations / Theses on the topic 'Alpine ecology'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Vonlanthen, Corinne Maria. "Alpine plant communities : ecology and species richness /." [S.l.] : [s.n.], 2005. http://www.zb.unibe.ch/download/eldiss/05vonlanthen_c.pdf.

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2

Pentlavalli, Prasanna. "An investigation into the microbial ecology of alpine paleosols." Thesis, Queen's University Belfast, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.677954.

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Soil is the most complex microbiome on the Earth. Specifically, very little is known about the microbial ecology and functional diversity of alpine paleosols. This work focuses on the microbial ecology of pristine paleosol sediments from the Western Alps, at a location called the "Col de la Traversette". We found that: 1) Microbial ecology studies on the alpine paleosols with 16S rRNA pyrosequencing analysis revealed several relationships. There was a strong inverse correlation between the Acidobacteria and the Verrucomicrobia populations from diverse samples. There was also a positive correla

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3

VALLEFUOCO, FRANCESCA. "Advancing quantitative understanding of flow-ecology relations in Alpine rivers." Doctoral thesis, country:IT, 2022. http://hdl.handle.net/10449/76097.

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Anthropic impacts adversely affect the productivity, integrity, connectivity, and resilience of riverine ecosystems, with widespread cumulative effects on the biota and biodiversity. The natural flow regime is a fundamental driver of physical and chemical processes, determining the morphological profile of the river systems and sustaining the complex network of ecological interactions and biological patterns. Therefore, in order to reach the environmental goals required by the binding legislation, and achieve a sustainable use of water resources, it is urgent to understand the mechanisms behin

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4

Vallefuoco, Francesca. "Advancing quantitative understanding of flow-ecology relations in Alpine rivers." Doctoral thesis, Università degli studi di Trento, 2022. http://hdl.handle.net/11572/348479.

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Anthropic impacts adversely affect the productivity, integrity, connectivity, and resilience of riverine ecosystems, with widespread cumulative effects on the biota and biodiversity. The natural flow regime is a fundamental driver of physical and chemical processes, determining the morphological profile of the river systems and sustaining the complex network of ecological interactions and biological patterns. Therefore, in order to reach the environmental goals required by the binding legislation, and achieve a sustainable use of water resources, it is urgent to understand the mechanisms behin

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5

Papanikolaou, Niki D. "Response of alpine heathland soils to environmental change and land management." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=25204.

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6

Hein, Nils [Verfasser]. "On the ecology and biogeography of alpine tundra arachnids / Nils Hein." Bonn : Universitäts- und Landesbibliothek Bonn, 2014. http://d-nb.info/106078713X/34.

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7

Ruotsalainen, Anna Liisa. "Mycorrhizal colonization and plant performance in arcto-alpine conditions /." Oulu [Finland] : Oulun Yliopisto, 2003. http://herkules.oulu.fi/isbn9514269888/html/index.html.

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8

Hotaling, Scott. "GENETIC PERSPECTIVES ON BIODIVERSITY IN ROCKY MOUNTAIN ALPINE STREAMS." UKnowledge, 2017. http://uknowledge.uky.edu/biology_etds/44.

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In alpine regions worldwide, climate change is dramatically altering ecosystems, affecting biodiversity across habitats and taxonomic scales. For streams, the associated recession of mountain glaciers and snowfields, paired with altered precipitation regimes, are driving shifts in hydrology, species distributions, and basal resources – often threatening the very existence of some habitats and biota. Globally, alpine streams harbor particularly substantial species and genetic diversity due to significant habitat insularity and environmental heterogeneity: however, anthropogenic warming threaten

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9

Johnston, Frances Mary. "Exotic Plants in the Australian Alps Including a Case Study of the Ecology of Achillea Millefolium, in Kosciuszko National Park." Thesis, Griffith University, 2006. http://hdl.handle.net/10072/365860.

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Exotic plants are a threat to natural areas world wide including the Australian Alps, one of the largest relatively undisturbed natural areas remaining in Australia. This thesis examines the diversity, abundance and distribution of exotic plants in the Australian Alps, including Kosciuszko National Park and then focuses on Achillea millefolium (L.) (Asteraceae) as a case study of the biology and ecology of an important environmental weed. To determine the diversity and abundance of exotics in the Australian Alps published records of exotic species were reviewed. A total of 175 exotic taxa were

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10

Ruotsalainen, A. L. (Anna Liisa). "Mycorrhizal colonization and plant performance in arcto-alpine conditions." Doctoral thesis, University of Oulu, 2003. http://urn.fi/urn:isbn:9514269888.

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Abstract Mycorrhizal symbiosis is generally advantageous for plants in nutrient-poor soils. Arcto-alpine areas are relatively nutrient-poor, but abundantly inhabited by non-mycorrhizal species. Possibly, mycorrhizal symbiosis is not favoured due to the harsh climatic conditions and the short growing season, which constrain the photosynthetic gain and growth of the arcto-alpine plants. This hypothesis was theoretically evaluated by assuming that optimal mycorrhizal colonization maximizes the net carbon gain of the host plant. In addition, the prevalence of arbuscular mycorrhizal (AM) and dark-s

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11

Scott, Matthew B., and n/a. "Fine-scale ecology of alpine patterned ground, Old Man Range, Central Otago, New Zealand." University of Otago. Department of Botany, 2007. http://adt.otago.ac.nz./public/adt-NZDU20080130.093120.

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This study is an interdisciplinary ecological study addressing the fine-scale relationships between plants, invertebrates and the environment in an alpine ecosystem. Alpine environments are marked by steep environmental gradients and complex habitat mosaics at various spatial scales. Regular forming periglacial patterned ground landforms on the Old Man Range, Central Otago, South Island, New Zealand present an ideal medium for studying plant-invertebrate-environment relationships due to their partitioning of the landscape into discrete units of contrasting environmental conditions, and the exi

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12

Novis, P. M. "Ecology and taxonomy of alpine algae, Mt. Philistine, Arthur's Pass National Park, New Zealand." Thesis, University of Canterbury. Plant and Microbial Sciences, 2001. http://hdl.handle.net/10092/6977.

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At least 67 distinct algal taxa occur in the alpine basins of Mt Philistine, Arthur's Pass National Park This flora differs from others reported in alpine and polar regions. Nine species of snow algae were found, none of which appear to grow in other habitats, and at least 6 of which are new records for New Zealand. An abundance of other algae are present, including cf. Gloeocapsa, Cyanothece aeruginosa, Fischerella sp., and Myrmecia cf. irreguiaris, which are particularly widely distributed throughout different habitats on the site. Certain other taxa are common in selected habitats, such as

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13

Marberg, Mikael. "Phippsia concinna in Sweden : Exploring ecological dependencies in a regionally endangered plant species that occurs in alpine snowbeds." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-101244.

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The purpose of this study is to 1: Get an updated population estimate for the regionally endangered alpine specialist plant Phippsia concinna in Sweden and 2: Explore the ecological dependencies that limits the distributions of this species to late melt-out alpine snowbeds on calcareous soils, and 3: Explore if climate change in the southern part of the Scandes mountain range is causing a decline in the population numbers of P. concinna. The majority of the sites in Sweden where P. concinna occurred historically was inventoried in 1992. This study presents the results of a re-inventory of the

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14

Jackson, Katherine Sarah. "The population dynamics of a hybrid zone in the Alpine grasshopper Podisma pedestris : an ecological and genetic investigation." Thesis, University College London (University of London), 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288321.

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15

Semenzato, Paola. "Movement ecology of female alpine ibex (Capra ibex): influence of resources, climate, and reproductive constraints." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3422315.

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There is now ample evidence of the ecological impacts of recent climate change on Alpine ecosystems. Animal populations, and in particular herbivores, can be affected directly, through modifications of the environmental temperature, and indirectly, through alteration of both distribution and phenology of plant communities. Understanding the behavioral strategies and tactics that populations and individuals use to buffer climatic variability and its impacts are particularly relevant in order to evaluate their vulnerability to climate change and develop incisive management and conservation actio

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16

Bruckner, Monica Zanzola. "Biogeochemistry and hydrology of three alpine proglacial environments resulting from glacier retreat." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/bruckner/BrucknerM1208.pdf.

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Proglacial environments, formed by glacier retreat, exhibit distinct characteristics in discharge, water temperature, water residence time, and dissolved ion, carbon, and suspended sediment concentrations. The unnamed alpine glacier at the headwaters of the Wheaton River, Yukon, Canada, provides an ideal setting to compare deglaciation processes that result in three different proglacial environments. The glacier has evolved from occupying one large catchment (~4 km 2) to two smaller catchments (each ~2 km 2) via glacier thinning and net mass loss, forming two lobes separated by a medial morain

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17

Shrestha, Hari Ram. "Post-fire recovery of carbon and nitrogen in sub-alpine soils of South-eastern Australia /." Connect to thesis, 2009. http://repository.unimelb.edu.au/10187/6963.

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The forests of south-eastern Australia, having evolved in one of the most fire-prone environments in the world, are characterized by many adaptations to recovery following burning. Thus forest ecosystems are characterized by rapid regenerative capacity, from either seed or re-sprouting, and mechanisms to recover nutrients volatilized, including an abundance of N2 fixing plants in natural assemblages. Soil physical, chemical and biological properties are directly altered during fire due to heating and oxidation of soil organic matter, and after fire due to changes in heat, light and moisture in

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18

Putnam, Emily Ruth Smith. "Ecology, Phylogenetics, and Conservation of Draba asterophora Complex: A Rare, Alpine, Endemic from Lake Tahoe, USA." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3904.

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Rare, alpine, endemic species are particularly at risk for extinction. Alpine environments are especially vulnerable to climate change and human impacts, such as ski resort development and snowmaking. Draba asterophora Payson is a rare, alpine species that occurs only in three disjunct mountain-top regions surrounding Lake Tahoe. It is currently threatened by human impacts, such as ski resorts, as well as indirect influences of climate change and therefore in need of better understanding for conservation purposes. Draba asterophora may be able to serve as a case study for other similarly vulne

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19

Westbrook, Matthew R. "Local scale forest encroachment into alpine habitat: past patterns and future predictions." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1396530374.

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20

Grafius, Darren Robert. "Distribution and biomass dynamics of the alpine treeline ecotone across the western United States." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/2880.

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The alpine treeline ecotone is primarily caused by climate at continental and regional scales, but at finer scales exhibits increasing complexity and linkages with abiotic factors. In order to better understand the dynamics and geographic properties of treeline, a three-pronged study was conducted. The study's first objective investigated what factors account for local treeline variation by comparing a climate-based predictive surface with actual treeline elevation. After finding that a mean growing season temperature of 10.27°C was t

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21

Glenn, Steven W. "Alpine Biological Soil Crusts in theWashington North Cascades| a Distribution Study at Select Sites Across a Precipitation Gradient." Thesis, Prescott College, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3712344.

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<p> One of the least researched phenomena within the alpine regions of mountain biomes is the combination of primitive plants, algae, fungi, and lichens that are generally referred to as biological soil crusts. Sites containing well-developed biological soil crusts were examined in a variety of alpine, non-forested, vegetated landscapes in the North Cascade Mountains of Washington, USA. For each site, data were recorded for percent ground cover of biological soil crusts, slope aspect, and slope gradient of the terrain where the crust communities were located. For all of the sites, biological s

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22

Tolsma, Arn Douwe. "The Effects of fire and grazing on the energy reserves of resprouting plants in Victoria's alpine grasslands /." Connect to thesis, 2002. http://eprints.unimelb.edu.au/archive/00000331.

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23

Hesling, Emily. "Arctic-Alpine ectomycorrhizal fungi in Scotland : the ecology of unexplored fungal communities and threats to their survival." Thesis, University of Aberdeen, 2013. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=210086.

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Arctic and alpine habitats are experiencing rapid change under the influences of climate change, land use and elevated nitrogen deposition both in the UK and globally. They are inhabited by ectomycorrhizal (ECM) fungi which perform a critical role supplying a suite of obligately dependent shrubs with nutrients required for survival and growth, in what are typically nutrient poor and climatically harsh habitats. However, there is little data on ECM fungi in the montane zone of Scotland. Communities of arctic-alpine ECM fungi were identified with DNA metabarcoding methods using high throughput s

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24

Smith, Derek, and n/a. "Movements, population dynamics and predatory behaviour of stoats inhabiting alpine grasslands in Fiordland." University of Otago. Department of Zoology, 2006. http://adt.otago.ac.nz./public/adt-NZDU20070330.160940.

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Stoats are introduced mammalian carnivores implicated in the decline of several of New Zealand�s endemic species. Most research into stoats in New Zealand has focused on beech forest habitat, especially in years of peak stoat abundance following heavy beech seedfall and peak cohorts of mice. In New Zealand, alpine grasslands occur above the altitudinal limit of beech forest (900-1000 m a.s.l.). Although previous research has shown stoats to be present there, little is known about the ecology of stoats in alpine grasslands. This research aimed to test whether alpine grasslands were a marginal h

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25

Verrall, Brodie. "Assessing alpine vegetation dynamics using long-term ecological monitoring amidst rapid climate change." Thesis, Griffith University, 2023. http://hdl.handle.net/10072/420962.

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Alpine ecosystems occur above the bioclimatic treeline and support cryophilic plant communities with high endemism, which are governed by low temperatures and short growing seasons. However, the climate of many alpine ecosystems is changing rapidly with warming temperatures, declining snow cover and lengthening growing seasons. Alpine vegetation dynamics in response to changes in climate over recent decades have been observed via long-term ecological monitoring techniques, but such studies are less common in the southern hemisphere including in the marginal alpine ecosystems of the Australian

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26

Johnson, Adelaide Chapman. "The role of wood microsites at timberline-alpine meadow borders for conifer regeneration." Thesis, Portland State University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3593581.

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<p> This research aimed to determine whether wood microsites ("nurse logs"), which are regeneration sites in Pacific Northwest (PNW) subalpine forests, supported regeneration at timberline-alpine meadow borders. Upward advance of forests and conifer invasion into alpine meadows, which may be occurring in conjunction with climate warming, have gained worldwide attention. Successful alpine meadow seedling regeneration depends on suitable substrate availability, or microsites, for seedling establishment. To better understand factors associated with wood microsite occurrence, mechanisms of wood

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27

Albert, Cécile. "Variabilité fonctionnelle intraspécifique : quantification in situ et implications dans une vallée alpine." Phd thesis, Grenoble 1, 2009. http://www.theses.fr/2009GRE10273.

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Face à une méconnaissance de la variabilité intraspécifique des traits fonctionnels végétaux, ce travail visait à la quantifier, comprendre le rôle des gradients environnementaux sur celle-ci, quantifier son importance relative vis-à-vis de la variabilité interspécifique et tester son impact sur le calcul d'indices de diversité fonctionnelle et un modèle de dynamique de la végétation. Suivant une stratégie d'échantillonnage stratifiée et hiérarchique, nous avons collecté des traits sur seize espèces communes d'une vallée alpine française. Nous avons montré qu'il existait une forte variabilité

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28

Smith, Emily Katherine. "Modeling Blister Rust Incidence in Whitebark Pine at Northern Rocky Mountain Alpine Treelines: A Geospatial Approach." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/33040.

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The status of whitebark pine (Pinus albicaulis), a foundation and keystone species and a pioneer establisher at alpine treeline, is threatened by the invasive and exotic fungal pathogen (Cronartium ribicola) that causes white pine blister rust in five-needled pines. Originally thought to be limited to moderate environments, the disease is now found extensively throughout colder and dryer regions east of the Continental Divide, including alpine treeline. My research objective was to determine how blister rust infection of treeline whitebark pine varies across Glacier National Park. I present fi

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29

Chambers, Jeanne C. "Disturbed Alpine Ecosystems: Seedling Establishment of Early and Late Seral Dominant Species." DigitalCommons@USU, 1987. https://digitalcommons.usu.edu/etd/6370.

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This study examined the effects of seedbed and seedling environment on establishment of early and late seral dominant alpine species. Species studied included late seral dominant forbs (Geum rossii, Artemisia scopulorum, and Polemonium viscosum), early seral dominant forbs (Potentilla diversifolia and Sibbaldia procumbens), a late seral dominant grass (Festuca idahoensis), and early seral dominant grasses (Calamagrostis purpurascens and Deschampsia cespitosa). Germination responses of each species to wet vs. dry cold stratification and light vs. dark conditions were investigated. No statistica

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30

Franklin, Rebecca Sara. "Climatic and Ecological Implications of Shrub-Chronologies at Rock Glacier Sites of the Eastern Sierra Nevada Range, California, U.S.A." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/242393.

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Herb- or shrub-chronology, a technique adapted from dendrochronology, is the study of the annual growth rings in roots of certain perennial dicotyledonous plants. The presence of annual growth increments in high-elevation plants is significant as it highlights the applicability of herbchronology for climatic, ecological and geomorphologic applications in alpine and other extra-arboreal regions. For alpine sites along the eastern crest of the Sierra Nevada range I present the first shrub-ring chronologies of the species Linanthus pungens (Torr.) J.M. Porter & L.A. Johnson. L. pungens individual

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31

Albert, Cécile. "Variabilité fonctionnelle intraspécifique : quantification in situ et implications dans une vallée alpine." Phd thesis, Université Joseph Fourier (Grenoble), 2009. http://tel.archives-ouvertes.fr/tel-00450219.

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Face à une méconnaissance de la variabilité intraspécifique des traits fonctionnels végétaux, ce travail visait à la quantifier, comprendre le rôle des gradients environnementaux sur celle-ci, quantifier son importance relative vis-à-vis de la variabilité interspécifique et tester son impact sur le calcul d'indices de diversité fonctionnelle et un modèle de dynamique de la végétation. Suivant une stratégie d'échantillonnage stratifiée et hiérarchique, nous avons collecté des traits sur seize espèces communes d'une vallée alpine française. Nous avons montré qu'il existait une forte variabilité

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32

Reider, Kelsey E. "Survival at the Summits: Amphibian Responses to Thermal Extremes, Disease, and Rapid Climate Change in the High Tropical Andes." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3919.

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Understanding biological responses to climate change is a primary concern in conservation biology. Of the ecosystems being rapidly impacted by climate change, those in the high-elevation tropics are among the most poorly studied. The tropical Andean biosphere includes record elevations above 5000 meters, where extreme environmental conditions challenge many organisms. In the Cordillera Vilcanota of southern Peru, frogs including Pleurodema marmoratum and Telmatobius marmoratus have expanded their ranges to 5244 – 5400 m into habitats created by glacial recession, making them among the highest

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33

Scherrer, Pascal, and n/a. "Monitoring Vegetation Change in the Kosciuszko Alpine Zone, Australia." Griffith University. Australian School of Environmental Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040715.125310.

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This thesis examined vegetation change over the last 43 years in Australia's largest contiguous alpine area, the Kosciuszko alpine zone in south-eastern Australia. Using historical and current data about the state of the most common vegetation community, tall alpine herbfield, this thesis addressed the questions: (1) what were the patterns of change at the species/genera and life form levels during this time period; (2) what were the patterns of recovery, if recovery occurred, from anthropogenic disturbances such as livestock grazing or trampling by tourists; (3) what impacts did natural distu

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Scherrer, Pascal. "Monitoring Vegetation Change in the Kosciuszko Alpine Zone, Australia." Thesis, Griffith University, 2004. http://hdl.handle.net/10072/366283.

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This thesis examined vegetation change over the last 43 years in Australia's largest contiguous alpine area, the Kosciuszko alpine zone in south-eastern Australia. Using historical and current data about the state of the most common vegetation community, tall alpine herbfield, this thesis addressed the questions: (1) what were the patterns of change at the species/genera and life form levels during this time period; (2) what were the patterns of recovery, if recovery occurred, from anthropogenic disturbances such as livestock grazing or trampling by tourists; (3) what impacts did natural distu

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35

Parraga, Aguado Maria Angeles. "GPS tracking in high mountain landscapes: insights into the movement ecology of female alpine ibex (Capra ibex ibex L. 1758)." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424109.

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The three studies reported in this thesis have been conducted on the Alpine ibex population of the Marmolada-Monzoni, in the north-eastearn Italian Alps. A summary for each study is given below. Chapter I: Land morphology, season and individual activity influence GPS fix acquisition rates and location error in an alpine ungulate. The use of GPS technologies in wildlife research has greatly increased the opportunities for addressing ecological issues that affect ultimately the conservation of the species. However, in order to formulate accurate and unbiased conclusions in studies of move

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Franklin, Lauren Nicole. "Landscape pattern and blister rust infection in whitebark pine (Pinus albicaulis) at alpine treeline, Northern Rocky Mountains, U.S.A." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/43466.

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Whitebark pine (Pinus albicaulis) is a foundation and keystone species at alpine treelines of the northern Rocky Mountains and is threatened by the fungus white pine blister rust (Cronartium ribicola). This disease affects all five-needled white pines, but has caused particularly widespread mortality in whitebark pine. Objectives of this research were: 1) to characterize the landscape structure of the treeline study sites at Divide Mountain in Glacier National Park and at Wyoming Creek in the Beartooth Mountains of Montana using landscape metrics and fieldwork; 2) to determine the frequency o

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Winn, Neil Thomas. "Modeling Dissolved Organic Carbon (DOC) in Subalpine and Alpine Lakes With GIS and Remote Sensing." Miami University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=miami1209058548.

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38

Rose, Kevin C. "CAUSES AND CONSEQUENCES OF VARIATION IN UV TRANSPARENCY FOR FRESHWATER ECOSYSTEMS." Miami University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=miami1304107334.

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39

Hansen, Jennifer. "Assessment of Atmospheric Nitrogen Deposition: Possible Effects on Alpine Ecosystems Above 9000 Feet In Grand Teton National Park." DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1250.

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Atmospheric N deposition is becoming a stressor on ecosystems in the western U.S. There are few National Atmospheric Deposition Program (NADP) monitoring sites and little is known about N deposition impacts on terrestrial ecosystems in the Intermountain West. Alpine ecosystems may be particularly sensitive to changes in N inputs because of the shallow soils, short growing seasons, and sparse plant cover. This study focused on N deposition effects on an alpine ecosystem in Grand Teton National Park located along a modeled N deposition gradient (Moose Basin high, Paint Brush Medium, Rendezvous M

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40

Chalmandrier, Loic. "De la communauté à la méta-communauté, décrypter les patrons de diversité." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAV033/document.

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Les patrons de diversité caractérisent la structure de la diversité des communautés, c'est-à-dire sa valeur, sa distribution et son changement dans l'espace et le temps. Leur étude peut amener des informations importantes sur les processus écologiques qui en sont à l'origine. Cependant de nombreuses hypothèses de travail sont faites lors de leur analyse. L'idée générale de cette thèse est qu'en remettant en cause ces hypothèses, un certain nombre de développements liés aux indices de diversité et aux modèles nuls deviennent possibles et permettent de mieux comprendre les processus écologiques

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41

Shetti, Rohan [Verfasser], Martin [Akademischer Betreuer] Wilmking, Achim [Gutachter] Bräuning, and Martin [Gutachter] Wilmking. "Potential of shrubs in the evolving field of Arctic and Alpine dendroecology : methods in shrub dendro-ecology: understanding the processes influencing shrub growth in the Arctic and Alpine ecosystems / Rohan Shetti ; Gutachter: Achim Bräuning, Martin Wilmking ; Betreuer: Martin Wilmking." Greifswald : Ernst-Moritz-Arndt-Universität, 2018. http://d-nb.info/1173322779/34.

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42

Satyanti, Annisa. "A multi-scale exploration of the drivers and implications of germination strategy in Australian alpine plants." Phd thesis, Canberra, ACT : The Australian National University, 2017. http://hdl.handle.net/1885/143519.

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Alpine ecosystems are particularly sensitive to the effects of global warming because they are characterized by species adapted to low temperatures. Although adapted to low temperatures, alpine plants may still be capable of persisting under a changing climate and this will largely be dependent on the ability of their seeds to germinate, establish and reproduce in situ, or after dispersal to new sites. The effects of climate change on regeneration from seeds may be influenced by intrinsic factors such as seed longevity (how long seeds remain viable and a

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Massing, Cody P. "American Pika (Ochotona princeps): Persistence and Activity Patterns in a Changing Climate." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/726.

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An increasing amount of evidence suggests that as temperatures increase, montane animals are moving upward in elevation (IPCC 2007, Parmesan and Yohe 2003). As suitable habitats rise in elevation and then disappear altogether, these animals could be pushed to extinction. The American pika, Ochotona princeps, is a montane mammal that lives in western North America, usually at elevations above 1500 m (Smith and Weston 1990). Recent evidence suggests that pika population numbers are dropping in response to rising temperatures (Beever et al. 2010). The pika is a small herbivorous lagomorph, a

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Boncourt, Etienne. "Quantifier la perméabilité des domaines skiables pour la Grenouille rousse (Rana temporaria) : une approche combinant suivi GPS et génétique du paysage." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAV011/document.

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La dispersion des animaux est un processus clé pour le maintien des populations et métapopulations. En particulier, les amphibiens se déplacent beaucoup durant leur cycle de vie fait de migrations saisonnières. Ceci les rend sensibles à la structure du paysage. En effet, les modifications anthropiques comme l’aménagement d’infrastructures linéaires peuvent constituer des barrières écologiques pour les animaux et limiter le flux de gènes dans le paysage. Si les effets des routes et des lignes chemins de fer sur les déplacements des animaux ont été largement étudiés, les effets des infrastructur

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ZANZOTTERA, MAGDA. "TRAIT-BASED FUNCTIONAL CHARACTERIZATION OF PLANT SPECIES AND COMMUNITIES: TRENDS AND ADAPTIONS TO ENVIRONMENT IN ALPINE AND EUROPEAN VEGETATION." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/844440.

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Over the last few decades, plant functional traits (morphological, physiological or phenological features, measurable at the individual level, with a direct or indirect effect on whole-plant fitness) have become widely applied to plant ecology; they provide many insights into plant responses to ecological factors, plant resource acquisition and use, plant assemblages and relations within and between communities, from individual to ecosystem scale. A small set of traits that co-vary recurrently among environments has been used to globally identify certain axes of variation, representing the dif

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Williams, R. J. "Aspects of shrub-grass dynamics on the Bogong High Plains (Subalpine), Victoria." Connect to thesis, 1985. http://repository.unimelb.edu.au/10187/2436.

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The Bogong High Plains are a series of alpine and subalpine plateaux in NE Victoria. The vegetation of the High Plains consists of woodland, heathland, grassland herbfield and wetland communities. On the better drained sites, the transition from heath dominated communities to grass dominated communities is correlated with gradients of decreasing accumulation and persistence of snow, increasing exposure to wind and low minimum air temperatures, and decreasing steepness and rockiness of terrain. In many areas, shrubs have increased in cover and abundance, especially over the last 50 years. In pa

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Lett, Signe. "Mosses as mediators of climate change : implications for tree seedling establishment in the tundra." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-130942.

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Alpine and arctic tree line expansion depends on the establishment of tree seedlings above the current tree line, which is expected to occur with climate warming. However, tree lines often fail to respond to higher temperatures. Other environmental factors are therefore likely important for tree seedling establishment. Above the tree line, establishing seedlings encounter existing vegetation such as bryophytes, which often dominate in arctic and alpine tundra. Bryophytes modify their environment in various ways and may mediate climate change effects on establishing tree seedlings, and with tha

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Chiffard, Jules. "Oiseaux chanteurs des milieux ouverts de montagne et changements globaux." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEP038.

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Du fait de la croissance démographique et économique de la population humaine, nos sociétés sont de plus en plus dépendantes de la nature, et plus précisément de certains processus biologiques regroupés sous le terme services écosystémiques. Comprendre les mécanismes de réponse des systèmes biologiques face aux changements globaux que nos activités induisent à plusieurs échelles est donc un enjeu scientifique et de société. Cette thèse a été pensée et réalisée en interaction avec plusieurs équipes de recherche et gestionnaires d’espaces naturels dans le cadre du développement d’un suivi tempor

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Cotza, Antonella. ""Females are not males: evolutionary strategies of the two sexes in chamois"." Doctoral thesis, Università di Siena, 2020. http://hdl.handle.net/11365/1116270.

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Vincoli evolutivi, fisiologici, anatomici potrebbero determinare diverse risposte individuali a fattori di stress ambientali (e.g. fattori climatici, stagionalità delle risorse), da parte di maschi e femmine. In ambienti montani, l'accesso a pascoli di alta qualità per gli erbivori è limitato ai mesi primaverili-estivi, rendendo così l’alimentazione estiva cruciale per la sopravvivenza invernale, in particolare per le femmine, che devono affrontare i costi della maternità, e per i nuovi nati. Nelle specie che vivono in gruppo, la stagionalità delle risorse può influenzare anche il comportament

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Shams, El Din Ahmed. "Human occupation development in the High Mountains of Sinai Peninsula, Egypt with Alpine and Himalayan reflections in the light of rural-urban development ‘socio-economy’, semi-arid watershed management ‘cocio-ecology’ and land use policy ‘governance’." Thesis, IMT Alti Studi Lucca, 2013. http://e-theses.imtlucca.it/101/1/Shams_el_din_ahmed_phdthesis.pdf.

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In theory and practice, centralization, sub-optimization, and transborder crisscross culture have been extensively discussed over decades with limited progress on the interdisciplinary level in the developing countries (precisely in the remote semi-arid highland regions: the High Mountains of Sinai Peninsula). Post the Egyptian National Reforms Revolution of January 25, 2011 CE, the need for a decentralized governance structure in the Arab Republic of Egypt surfaced once again as one of the very demanding reforms for socio-economic and socio-ecological sustainable development., accounting to s

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