Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 171 for “"Ecosystem Function"”.
-
Effects of experimentally-altered hydrology on ecosystem function in headwater streams
Forested headwater stream ecosystems are important integrators of terrestrial and aquatic systems and their function depends greatly on water availability. In the southern Appalachians, models of future climate change predict alterations to the timing and intensity of storms such that most …
-
Novel approaches for modelling changes in phytoplankton diversity and lake ecosystem function
Ecosystem function represents the collective outcome of many different processes. Function may be interrupted by events that originate from outside a system, influencing biological diversity dynamics. Difficulties in expressing how a system is functioning originate firstly from being able to define …
-
Systems approaches to infer microbial community interactions and their impacts on ecosystem function
… the communities they form play critical roles in ecosystem function, from facilitating the biogeochemical cycling of essential nutrients, such as carbon, nitrogen, and sulfur, to acting as the foundation of complex food webs. Microbes also play important roles as eukaryotic symbionts, where they …
-
Biodiversity and ecosystem function and the design of tallgrass restorations for biomass production
1 PDF file (vii, 66 pages)
-
Exploring the relationship between restored ecosystem function and species composition: a meta-analysis
… idea that biodiversity confers higher levels of ecosystem functioning has been used as an argument for the conservation of biodiversity, and the relationship between these variables has been well researched. Ecosystem restoration often aims to restore former ecosystem functioning as well as …
-
Communities of Arbuscular Mycorrhizal Fungi in Salt Marsh Habitats: Diversity, Structure, and Ecosystem Function
The relationship between ecosystem functioning and the biodiversity of microorganisms has been a central focus of recent ecological studies, and fungi are considered to play a key role in this relationship. For example, the Mycorrhizae’s association with two-thirds of terrestrial plants makes them …
-
Effects of beaver dam analogs on stream ecosystem function of Crab Creek, Washington State
… are structures placed in streams to mimic the ecosystem effects of beaver activity and are increasingly used as a stream restoration technique. The primary goals of placing these BDAs in the stream was to impound sediment and create a new floodplain at the currently incised stream channel. …
-
Determining the role of plant-soil-microbial relationships in forest ecosystem function and biogeochemistry
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
-
Stress-induced alterations in ecosystem function: the role of acidification in lotic metabolism and biogeochemistry
… of microbial compartments responsible for these ecosystem processes. Microcosm incubations of leaf biofilms from streams of differing pH revealed greater rates of fungal biomass-specific respiration (i.e. the stress metric <i>q</i>CO₂) and biomass-specific N uptake (i.e. <i>q</i>N) with …
-
The effects of invasive slender false-brome (Brachypodium sylvaticum) on forest ecosystem function in western New York
… Some species become invasive and can impact ecosystems by changing soil, water, and nutrient dynamics. Disrupting these important ecosystem processes can facilitate further invasion. Slender false-brome (Brachypodium sylvaticum) is an exotic bunchgrass that is invasive in North America. Its …
-
Influence of riparian forest and agricultural land use on community structure and ecosystem function in headwater streams
… temporal patterns in community structure and ecosystem function related to land use, instream habitat, and water quality parameters. While there were significant seasonal and annual differences, relationships among streams within different land use groups remained relatively consistent …
-
Moving beyond the stream reach: Assessing how confluences alter ecosystem function and water quality in freshwater networks
… and terrestrial sources that support in-stream ecosystem processes and regulate downstream water quality. Understanding how these processes within a stream alter downstream carbon and nutrient fluxes is needed to assess the functional role of lotic ecosystems on the landscape. Further, …
-
Unraveling an uncertain future for the Great Basin: how climate, grass invasion, and wildfire interact to drive ecosystem function
… how these drivers interact to influence ecosystem function, and how such interactions may change in the future, can provide critical insight for building ecological resilience. This dissertation explores how changing moisture regimes interact with grass invasion and wildfire to modify …
-
UNDERSTANDING OF THE VARIABILITY OF PHYTOPLANKTON ECOSYSTEM FUNCTION PROPERTIES: A SYNERGISTIC USE OF REMOTE SENSING AND IN SITU DATA
… expert system discriminated phytoplankton functional types. The ecological knowledge was derived from the Continuous Plankton Recorder (CPR) survey, whereas information regarding the physical regime was acquired from satellite remote sensing. The data matrix was analysed using Generalised …
-
Soil microbial function in a time of global change: effect of dairy antibiotics on soil microbial communities and ecosystem function
… potential to disturb microbial communities and ecosystem functions they regulate is under appreciated. Antibiotics are commonly used in the livestock sector, accounting for 80% of antibiotic use domestically. This dissertation addresses three facets of this problem. Chapter 2 is a nation-wide …
-
Interactions between ants and diaspores of flowering plants (myrmecochory) in Sicily (Southern Italy): an important ecosystem function of the Mediterranean basin
Almeno 11.500 specie esistenti (e forse il doppio) di piante a fiore della divisione Angiospermae, stringono rapporti di mutualismo (obbligato o facoltativo) in habitat diversi su tutti i continenti ad eccezione dell Antartide, attraverso le loro diaspore sessuali (semi o frutti + appendici esterne …
-
Identification and incorporation of quantitative indicators of ecosystem function into single-species fishery stock assessment models and the associated biological reference points
The move towards an ecosystem approach to fisheries management requires baseline information on the biotic communities and an understanding of the interactions among species. The two objectives of this study were to describe the demersal fish community (DFC) associated with the northwestern Gulf …
-
Relationships between water quality, species composition, biodiversity and ecosystem function in lakes and flooded pits exposed to uranium mining activities in Northern Saskatechewan
… on species composition, biodiversity and ecosystem function in aquatic systems. This study uses a multivariate approach to look for relationships between water quality (24 variables), plankton species composition and abundance, biodiversity (richness and evenness) and ecosystem function …
-
Modelling techniques for biodiversity and ecosystem multifunctionality - theoretical development and application.
… methods for analysing the biodiversity and ecosystem function relationship, focusing on complexities arising from examining species rich ecosystems and examining multiple ecosystem functions. I developed a parsimonious model for assessing diversity effects on ecosystem function in species …
Page 1 of 9