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Thematische Bibliographien / Dynamic ecosystem modelling / Dissertationen

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Dissertationen zum Thema „Dynamic ecosystem modelling“

Autor: Grafiati

Veröffentlicht am 8. Februar 2025

Zuletzt aktualisiert am 31. Juli 2025

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1

Babi, Almenar Javier. "Characterisation, biophysical modelling and monetary valuation of urban nature-based solutions as a support tool for urban planning and landscape design." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/288810.

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The recognition of nature in the resolution of societal challenges has been growing in relevance. This recognition has been associated with the development of new concepts from science and policy such as natural capital, ecosystem services, green infrastructure, and more recently Nature-Based Solutions (NBS). NBS intends to address societal challenges in an effective and adaptive form providing economic, social, and environmental benefits. The overall aim of this PhD thesis is to develop an environmental and economic assessment of NBS for highly urbanised territories based on rationales and mo

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2

Mori, Mitsuyo. "Modelling the krill-predator dynamics of the Antarctic ecosystem." Doctoral thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/8734.

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Includes bibliographical references (p. 281-303).<br>The main objective of this thesis is to model the krill-predator dynamics of the Antarctic ecosystem so as to determine whether predator-prey interactions alone can broadly explain observed population trends of the species considered in the model without any appeal to systematic effects possibly caused by environmental change. The history of human harvesting in the Antarctic is summarized brieﬂy, and the central role played by krill is emphasized. The background to the hypothesis of a krill surplus in the mid 20th Century is described, and t

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3

Wright, Jennifer Kathryn. "Carbon dynamics of longleaf pine ecosystems." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/11675.

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The interactions between vegetation and climate are complex and critical to our ability to predict and mitigate climate change. Savanna ecosystems, unique in their structure and composition, are particularly dynamic and their carbon cycling has been identified as highly significant to the global carbon budget. Understanding the responses of these dynamic ecosystems to environmental conditions is therefore central to both ecosystem management and scientific knowledge. Longleaf pine ecosystems are highly biodiverse and unique savanna ecosystems located in the south-eastern USA – an important cur

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4

Guibourd, de Luzinais Vianney. "L'impact des vagues de chaleurs marines sur le fonctionnement des écosystèmes de l'océan à l'échelle mondiale." Electronic Thesis or Diss., Rennes, Agrocampus Ouest, 2024. http://www.theses.fr/2024NSARH121.

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Le changement climatique affecte de plus en plus la vie marine. Les vagues de chaleur marines (MHWs), liées au réchauffement, devraient augmenter en durée, intensité et fréquence, amplifiant leurs impacts sur les écosystèmes marins au 21e siècle. Cette thèse explore les effets du changement climatique et des MHWs sur les flux de biomasse dans les réseaux trophiques marins et leurs conséquences sur la structure et le fonctionnement des écosystèmes. J’ai développé EcoTroph-Dyn, une version dynamique du modèle EcoTroph, représentant le fonctionnement des écosystèmes marins comme un flux de biomas

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5

Barciela, FernaÌndez Rosa MariÌa. "Modelling ecosystem dynamics in the turblent surface layers of the ocean." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252437.

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6

Harlin, Hugo. "2D Modelling of Phytoplankton Dynamics in Freshwater Lakes." Thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-388868.

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Phytoplankton are single celled organisms capable of phytosynthesis, and are present in all the major oceans and lakes in the world. Phytoplankton contribute to 50% of the total primary production on Earth, and are the dominating primary producer in most aquatic ecosystems. This thesis is based on the 1D deterministic model by Jäger et. al. (2010) which models phytoplankton dynamics in freshwater lakes, where phytoplankton growth is limited by the availability of light and phosphorus. The original model is here extended to two dimensions to include a horizontal dimension as well as a vertical

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7

Trolle, Dennis. "The influence of sediment nutrient dynamics on the response of lake ecosystems to restoration and climate change." The University of Waikato, 2009. http://hdl.handle.net/10289/2808.

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Human activities such as urban settlement, farming, forestry and recreation, have caused deterioration of water quality in many freshwater lakes worldwide. Apart from anthropogenic impacts, it is also recognized that climate has a direct influence on lake water temperature, nutrient loads, phytoplankton abundance and chemistry. However, little is known about the potential effects of future climate change on lake water quality. Understanding the dynamics, abundance and availability of nutrient pools in lake bottom sediments is fundamentally important for predicting how, and over what time-scale

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8

Svensson, Magnus. "Carbon dynamics in spruce forest ecosystems - modelling pools and trends for Swedish conditions." Doctoral thesis, Stockholm : Department of Real Estate and Construction Management, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4240.

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9

Kabir, Md Imran. "Dynamics of heavy metals in urban green water infrastructures." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14510.

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In urban environments, the breakdown of chemicals and pollutants, especially ions and metal compounds, can be favoured by Green Water Infrastructures (GWIs). If a better picture of chemicals and pollutants input and an improved understanding of hydrological and biogeochemical processes affecting these pollutants were known, GWIs could be designed to efficiently retain these pollutants for site-specific meteorological patterns and pollutant load. To fill in these gaps, the existing literature was surveyed to retrieve a comprehensive dataset of anions and heavy metal pollutants incoming to urban

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10

Karlsson, Olof Magnus. "Predicting Ecosystem Response from Pollution in Baltic Archipelago areas using Mass-balance Modelling." Doctoral thesis, Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-144120.

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Baltic archipelago areas have high nature values despite being polluted from various antrophogenic activities within the Baltic Sea catchment area and from long-range transport of airborne substances. The discovery of environmental problems in the Baltic Sea in the 1960s led to countermeasures that gradually gave results in reducing the toxic pollution, e.g. from PCBs. Today, much of the environmental management is focused on reducing the effects of eutrophication. There is a demand from society on science to develop strategies that can direct remedial actions so that the cost-effectiveness is

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11

Hafezi, Mohammad Mehdi. "A Hybrid Modelling Framework for Ecosystem-Based Climate Change Adaptation Using System Dynamics and Bayesian Networks." Thesis, Griffith University, 2020. http://hdl.handle.net/10072/398439.

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The world is undoubtedly being threatened by the negative impacts of climate change. The degradation of the ecosystem, the loss of species and the endangerment of human health, livelihood and wellbeing are the main consequences of this ever-growing pressure. Coastal communities, particularly Small Island Developing States (SIDS), require extra attention due to their increased vulnerability and dependency on ecosystem services. Services provide by coral reefs are among the most fragile ecosystems that provide essential services to local SIDS communities. Adaptation is a commonly accepted method

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12

Nightingale, Joanne M. "Modelling carbon dynamics within tropical rainforest environments using the 3-PG and 3-PGS ecosystem process models /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18498.pdf.

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13

Bourdaud, Pierre. "Impact of a landing obligation on coupled dynamics ecosystem-fishers : individual-based modelling approach applied to Eastern English Channel." Thesis, Littoral, 2018. http://www.theses.fr/2018DUNK0474/document.

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L'objectif de cette thèse était d'anticiper les effets de l'Obligation de Débarquement (OD) mise en place en UE depuis début 2015 en Manche Orientale (MO). Pour accomplir ces objectifs, il a été prévu de : i) mieux comprendre la distribution spatiale saisonnière d'espèces commerciales à l'aide d'observations embarquées sur des navires commerciaux, ii) les comparer avec la distribution de l'effort de pêche à fine échelle des chalutiers de fonds (OTB), et iii) développer un modèle individu-centré de dynamique des flotilles, DSVM, à intégrer avec le modèle écosystémique OSMOSE pour simuler l'OD.

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14

Gyllenhammar, Andreas. "Predictive Modelling of Aquatic Ecosystems at Different Scales using Mass Balances and GIS." Doctoral thesis, Uppsala University, Department of Earth Sciences, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4143.

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<p>This thesis presents models applicable for aquatic ecosystems. Geographical Information Systems (GIS) form an important part of the thesis. The dynamic mass balance models focus on nutrient fluxes, biotic/abiotic interactions and operate on different temporal and spatial scales (site, local, regional and international). The relevance and role of scale in mass balance modelling is a focal point of the thesis.</p><p>A mesocosm experiment was used to construct a model to estimate the nutrient load of phosphorus and nitrogen from net cage fish farming (i.e., the site scale). The model was used

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15

Camarotto, Carlo. "Sustainable land management practices in the low-lying Venetian plain: relationship to soil ecosystem services." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3424694.

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Sustainable land management (SLM) practices, as conservation agriculture (CA) and conventional tillage with cover crops (CC), aimed at balancing competitive agricultural production and environmental protection, have been encouraged throughout the EU through policy and subsidisation. Adoption of SLM practices that regulate biogeochemical cycles, however, requires further study, especially given the effects of local pedo-climatic variability and because middle and long-term effects are not fully understood and may differ from short-term outcomes. For these reasons, in this

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16

Olagoke, Adewole. "Towards a better characterization of morphological plasticity and biomass partitioning of trees in structural dynamics of mangrove forests." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-221076.

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Changing environmental conditions often impose stressful growing conditions in plant communities. Until now, morphological plasticity, i.e. polymorphic growth physiognomies of plants, has not been sufficiently studied as a pivotal strategy for the whole ecosystem adaptation to environmental stress. We consider mangrove ecosystems as suitable models to provide insights on this subject. In the thesis, I investigate the ecological significance of tree morphological plasticity in the structural development and the dynamics of mangrove forests. I conducted field experiments in two regions locate

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Kabora, T. K. "Dynamics of water-management systems in historical East African agricultural societies : modelling the long-term ecosystem and socioeconomic interactions in a historical agronomy in Engaruka, Tanzania." Thesis, University of York, 2018. http://etheses.whiterose.ac.uk/22528/.

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The research conducted explored the dynamics of the historical water-management system that was in use at Engaruka, Tanzania, between the 15th to 18th centuries CE, the aim being to model the primary human and environmental factors and their interactions, and to assess how these influenced the development of the system at several spatial and temporal scales. The ABMs developed in this research represent first steps in the integration of archaeological evidence with ABM techniques in order to understand the Engaruka site. This research shows how the integration of data from different sources an

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McCluskey, D. K. "On the application of detached eddy simulation turbulence modelling to hydrocyclonic separators for shipboard ballast water treatment." Thesis, Coventry University, 2009. http://curve.coventry.ac.uk/open/items/cf872aaa-ff59-d20c-fbdb-75f55773e213/1.

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There is significant worldwide environmental concern related to the transportation of Invasive Aquatic Species (IAS) by ships ballast water into non-native environments. This has given rise to the development of a vast array of technological ballast water treatment systems. The complex environmental challenges and tight operational characteristics of marine vessels limits the scope of the technologies used for Ballast Water Treatment (BWT). As a result few technologies have progressed beyond the research and development stage; however one of the most promising technologies for ship board use i

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Borile, Claudio. "Effects of non-linearities and disorder in systems with multiple absorbing states. A perspective for modeling the dynamics of complex ecosystems." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3423089.

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Interacting particle systems are a particular class of stochastic processes where single degrees of freedom interact through probabilistic rules defined over a graph which reflects the spatial topology of the model. From the statistical mechanics point of view these models are of particular interest since they are genuinely out-of-equilibrium processes and introduce new universality classes and dynamical phase transitions. Among these processes, systems with absorbing states are characterized by points in the state-space in which the dynamics becomes trivial and, once reached, cannot be leav

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20

Gaillard, Camille [Verfasser], Simon [Gutachter] Scheiter, and Thomas [Gutachter] Hickler. "Process based modelling of ecosystem structure and dynamics with aDGVM2 : a case study of whole-plant trait trade-offs & shrubs in African savannas / Camille Gaillard ; Gutachter: Simon Scheiter, Thomas Hickler." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2021. http://nbn-resolving.de/urn:nbn:de:hebis:30:3-613446.

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21

Post, Joachim. "Integrated process-based simulation of soil carbon dynamics in river basins under present, recent past and future environmental conditions." Phd thesis, kostenfrei, 2006. http://opus.kobv.de/ubp/volltexte/2006/1150/.

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22

Babi, Almenar Javier. "Characterisation, biophysical modelling and monetary valuation of urban nature-based solutions as a support tool for urban planning and landscape design." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/288810.

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The recognition of nature in the resolution of societal challenges has been growing in relevance. This recognition has been associated with the development of new concepts from science and policy such as natural capital, ecosystem services, green infrastructure, and more recently Nature-Based Solutions (NBS). NBS intends to address societal challenges in an effective and adaptive form providing economic, social, and environmental benefits. The overall aim of this PhD thesis is to develop an environmental and economic assessment of NBS for highly urbanised territories based on rationales and mo

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23

Jahel, Camille. "Analyse des dynamiques des agroécosystèmes par modélisation spatialisée et utilisation d’images satellitaires, Cas d’étude de l’ouest du Burkina Faso." Electronic Thesis or Diss., Paris, AgroParisTech, 2016. http://www.theses.fr/2016AGPT0059.

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L’organisation des territoires ruraux d’Afrique de l’Ouest a été bouleversée ces vingt dernières années par des changements rapides, dus à un accroissement démographique sans précédent, à des politiques favorisant les cultures d’exportation et à l’introduction de nouvelles techniques culturales. On assiste aujourd’hui à une mutation des structures d’exploitation, une pression sur les ressources forestières, un épuisement des sols et une saturation de l’espace cultivé. Les tensions pour l’accès aux ressources se multiplient, faisant souvent ressurgir d’anciens conflits ethniques, et la question

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24

Bellot, Benoit. "Améliorer les connaissances sur les processus écologiques régissant les dynamiques de populations d'auxiliaires de culture : modélisation couplant paysages et populations pour l'aide à l'échantillonnage biologique dans l'espace et le temps." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1B008/document.

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Une alternative prometteuse à la lutte chimique pour la régulation des ravageurs de culture consiste à favoriser les populations de leurs prédateurs en jouant sur la structure du paysage agricole. L'identification de structures spatio-temporelles favorables aux ennemis naturels peut se faire par l'exploration de scénarios paysagers via une modélisation couplée de paysages et de dynamiques de population. Dans cette approche, les dynamiques de populations sont simulées sur des paysages virtuels aux propriétés structurales contrôlées, et l'observation des motifs de populations associés permet l'i

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Quadling, Mark Sherwood. "Frame modelling of dynammic ecosystems." Thesis, 1992. https://hdl.handle.net/10539/27808.

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A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg. in fulfilment of the requirements tor the degree of Master of Science<br>This thesis develops the theoretical basis of the qualitative frame based modelling technique, a paradigm recently proposed by Starfield for the modelling of ecosystems with a multiplicity of stable states. This technique is a refinement of the State-and- Transition conceptual model of Westoby et al which involves the division of the ecosystem dynamics into a catelog of stable 'states' and a suite of transitions betwee

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Berjak, Stephen Gary. "Spatial modelling of fire dynamics in Savanna ecosystems." Thesis, 1999. http://hdl.handle.net/10413/5755.

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Fire is used in the management of ecosystems worldwide because it is a relatively inexpensive means of manipulating thousands of hectares of vegetation. Deciding how, where and when to apply fire depends primarily on the management objectives of the area concerned. The decision to ignite vegetation is generally subjective and depends on the experience of the fire manager. To facilitate this process, ancillary tools, forming a decision support system, need to be constructed. In this study a spatial model has been developed that is capable of simulating fire dynamics in savanna ecosystems. The f

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Forestier, R. "Modelling eco-evolutionary dynamics of species’ traits in size-structured ecosystems." Thesis, 2021. https://eprints.utas.edu.au/38385/1/Forestier_whole_thesis.pdf.

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Human impacts on natural systems are driving rapid ecological and evolutionary changes. In the ocean, we know that fishing and climate change are affecting the functional traits of species and restructuring ecosystems. However, the extent to which evolutionary adaptations can buffer ecosystems against these impacts is not well understood. This information is needed to improve knowledge of how ecosystem function and biodiversity are being affected by a rapidly changing ocean. This thesis is centred around the introduction of evolutionary dynamics into trait-based models. Trait-based models cap

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Dean, C. "Land use and carbon dynamics in woody ecosystems." Thesis, 2017. https://eprints.utas.edu.au/23750/1/Dean_whole_thesis.pdf.

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Humanity has not yet been able to contain its influence on global average temperatures nor on the carry-over effects of that to the biosphere, namely climate change initiated by our carbon emissions, and positive feedback on temperature is likely to increase. The contribution played by our land use change (LUC) is millennia-old and annually it is currently comparable to that of fossil fuel usage, but it is less precisely known. The key aim of this thesis is to improve the knowledge about carbon emissions from LUC to the atmosphere so that we can control them better (‘climate change mitigation’

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Laurita, Beatrice. "Modelling dynamics of water conflicts: the case of Carracillo region (Spain)." Doctoral thesis, 2020. http://hdl.handle.net/2158/1202807.

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Equitable water allocation in the context of local-scale water conflicts can be very challenging. This study aimed at providing new perspectives to the analysis of local water conflict with a special focus on two issues. First, the most vulnerable communities, who face the largest risk from unbalanced water management decisions, are often devoid of any technical and scientific support. And second, ecosystem services are hardly took into account when it comes to water allocation decision-making. We present a holistic framework for the analysis of small-scale water disputes, contributing an int

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Karlberg, Ylva. "Importance of fish community structure, nutrients and browning for shallow lake ecosystem dynamics : A modelling perspective." Thesis, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-379113.

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In a changing climate, it is increasingly important to be able to model environmental effects on food webs, and to do that, one must have appropriate dynamic models. I present a shallow lake ecosystem model where producers, grazers, carnivores, piscivores, and detritivores are coupled through resource (light, nutrients and detritus) fluxes between the benthic and pelagic habitats and through carnivore life history events (ontogenetic habitat and diet shifts). The two habitats each contain primary producers, grazers, carnivores and detritivores. Within the habitats, there is strong top-down reg

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Radny, Janina. "Profiling plants to predict range dynamics under climate warming." Doctoral thesis, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0003-C1B4-7.

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32

Evans, R. "An integrated study of a rapidly changing continental shelf ecosystem : linking physical conditions, prey field dynamics and top predator behaviour through a marine heatwave event." Thesis, 2019. https://eprints.utas.edu.au/33605/1/Evans_whole_thesis.pdf.

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The land-sea interface provides some of the world’s most valuable and biodiverse habitats, despite being exposed to anthropogenic pressures. Marine predators which cross this interface are particularly vulnerable, with human activities in coastal zones diminishing both the quality and availability of suitable breeding and foraging areas. These predators are constrained to forage in smaller oceanic regions while rearing young on-land, therefore their reproductive success is intrinsically linked to the productivity of nearshore waters. Changing environmental conditions, as a direct and indirect

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König, Sara. "Modelling spatiotemporal dynamics of biodegradation under disturbances: Insights into functional stability of microbial ecosystems." Doctoral thesis, 2016. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2016092815010.

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Terrestrial environments are highly complex and dynamic. It consists of various types of soils which are constantly exposed to fluctuating conditions affecting their physical and biological properties. Moreover, soils are delivering several ecosystem services with high relevance for the human well-being such as water purification, nutrient cycling, or biodegradation. For many of those ecosystem services, microorganisms are the main drivers. In consequence, it is important to understand the functional response of microbial ecosystems to disturbances. Thus, identifying key factors for the functi

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Marzloff, MP. "Towards ecosystem-based management of Tasmanian temperate rocky reefs : community dynamics models indicate alternative community states and management strategies." Thesis, 2012. https://eprints.utas.edu.au/14775/3/whole-marzloff-thesis-2012-inc-pub-mat.pdf.

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Worldwide, ecosystems have demonstrated the potential for dramatic shifts to an alternative persistent state under gradual long-term environmental changes or following sudden short-term perturbations. Such shifts are documented for numerous marine examples from coral reef to pelagic communities and may become more common as ecological dynamics adjust to climate-driven changes. These shifts are often sudden, challenging to predict and can have disastrous and unpredictable consequences on both ecosystem functioning and the human activities that rely on the associated natural resources. They ofte

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Czurylowicz, Peter. "Leaf Area Index, Carbon Cycling Dynamics and Ecosystem Resilience in Mountain Pine Beetle Affected Areas of British Columbia from 1999 to 2008." Thesis, 2010. http://hdl.handle.net/1807/30143.

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The affect on leaf area index (LAI) and net ecosystem production (NEP) of the mountain pine beetle (Dendroctonus ponderosae) (MPB) outbreak in British Columbia affecting lodgepole pine (Pinus contorta var. latifolia) forests was examined from 1999 to 2008. The process-based carbon (C) cycle model – Boreal Ecosystem Productivity Simulator (BEPS) with remotely sensed LAI inputs was used to produce annual NEP maps, which were validated using field measurements. The annual NEP ranged from 2.43 to -8.03 MtC between 1999 and 2008, with sink to source conversion in 2000. The inter-annual variability

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Olagoke, Adewole. "Towards a better characterization of morphological plasticity and biomass partitioning of trees in structural dynamics of mangrove forests." Doctoral thesis, 2016. https://tud.qucosa.de/id/qucosa%3A30214.

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Changing environmental conditions often impose stressful growing conditions in plant communities. Until now, morphological plasticity, i.e. polymorphic growth physiognomies of plants, has not been sufficiently studied as a pivotal strategy for the whole ecosystem adaptation to environmental stress. We consider mangrove ecosystems as suitable models to provide insights on this subject. In the thesis, I investigate the ecological significance of tree morphological plasticity in the structural development and the dynamics of mangrove forests. I conducted field experiments in two regions locate

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