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 40 for “"functional types"”.
-
CO₂ responsiveness of different plant functional types
Atmospheric CO₂ levels have increased by 30 % since the onset of the industrial revolution and are likely to continue to rise in the future. Whilst growth of plants is typically enhanced under elevated CO₂ concentrations, the degree of the response varies from species. In this study 4 species were …
-
Microbial responses to plant functional types and historical resources additions in the shortgrass steppe
… microbial activity may be affected by plant functional types (PFT) through influence on the levels of inorganic nitrogen (N) and labile carbon in the rhizosphere. This is particularly important in the shortgrass steppe (SGS), where plants with the C3 or C4 photosynthetic pathway differ in …
-
QUANTIFYING THE DISTRIBUTION OF FOREST FUNCTIONAL TYPES AND FOREST LEAF AREA INDEX IN THE ALPS
… model, the distribution of the vegetation types and LAI along elevation gradients was investigated. The results in National Park Berchtesgaden were further used in an extrapolation to classify land cover in Stubai and Ötz Valleys. Except to detect the distribution of land cover classes, …
-
Functional analysis and modelling of vegetation: plant functional types in a mesocosmos experiment and a mechanistic model
The focus of this thesis lies on the functional analysis and modelling of vegetation. A statistical method for the optimisation of plant functional types is developed in the first part. The fourth corner method by Pierre Legendre et al. was adapted to the task of grouping of plant functional types. …
-
Linking microbes and climate : insights into the marine oxygen and nitrogen cycles with microbial metabolic functional types
… microbial community is resolved using metabolic functional types, which represent metabolisms as a function of their underlying redox chemistry and physiology. In Chapter 2, I use a simple model to predict the limiting oxygen concentration of aerobic microbial growth in an ecosystem. This …
-
Remote Sensing Characterization of Ecosystem Structure and Functional Types to Inform on Biodiversity Conservation in the Lowland Chocó Rainforest
… to characterize ecosystem structure and functional types to inform on biodiversity conservation. This work is motivated by a guiding hypothesis that increased degradation of tropical forest biodiversity due to human activity results in in measurable changes in ecosystem processes that can …
-
The effects of cloud moisture on Restions, Ericas and Proteas in the Cape Floristic region
… a water subsidy to plants of various ecosystem types. In this study, we investigate the presence of foliar uptake, and the effects of misting on the plant water potential of species representing diverse functional types, namely ericoids, proteoids and restioids in Fynbos species occurring within …
-
Drivers of landscape evolution in northern ecosystems: Shrub expansion, vegetation-fire interaction, and permafrost degradation
… to measure fire severity based on the plant functional types present on the ground. Current fire metrics are largely insensitive to ground vegetation, but different plant functional types have different properties as fuels and in recovery after a fire. Based on high-resolution satellite …
-
Plant Species and Functional Diversity along Altitudinal Gradients, Southwest Ethiopian Highlands
… diversity. This thesis, therefore, applies plant functional types (hereafter PFTs) approach to study the response of vegetation to environmental factors in the southwest Ethiopian highlands. It focuses on the classification of the vegetation into a few main plant functional response categories and …
-
A functional analysis of the response of the Southern Kalahari dune vegetation to land-use intensity
… to group plant species according to their functional characteristics into functional types than attempting to predict plant response solely based on previous range distribution data. The present study involved a survey of the dunefield vegetation of several privately owned farms as well as …
-
Estimating phytoplankton size classes from their inherent optical properties
… regulation of greenhouse gases, with different functional types affecting the carbon cycle differently. The most practical way of synoptically mapping the ocean’s phytoplankton communities is through remote sensing with the aid of ocean-optics algorithms. This thesis is a study of the …
-
A Taxonomy of Rules: Authority, Dangers, and Possibilities
… This thesis names and explores different functional types of rules: safety, personal, socio-cultural, legal-religious, and technical. Rules in general are discussed from social and ethical theoretical viewpoints and using ideal type methodology. Understanding that there are different types …
-
A Taxonomy of Rules: Authority, Dangers, and Possibilities
… This thesis names and explores different functional types of rules: safety, personal, socio-cultural, legal-religious, and technical. Rules in general are discussed from social and ethical theoretical viewpoints and using ideal type methodology. Understanding that there are different types …
-
FLOW CYTOMETRIC INVESTIGATION OF THE SIZE SPECTRUM OF NORTH SEA PHYTOPLANKTON COMMUNITIES
… models. Phytoplankton can be divided into functional types based on cell size: microplankton (<200 μm), nanoplankton (2-20 μm) and picoplankton (≤ 3 μm). Differences in cell volume govern variations in carbon content, nutrient uptake and influence cell fate. Reduced diameters equate to …
-
The direct implications of warming on the phenotype and underlying functional traits of marine phytoplankton
… that are influenced by phytoplankton phenotypes that change over different spatial and temporal scales. It is expected ocean warming (increasing sea surface temperatures; SST) will alter these patterns because temperature is the primary environmental control governing metabolism and growth …
-
Understanding scale impacts of heterogeneity and topography on water and energy fluxes in mountain meadows using a fully-integrated hydrologic model
… LiDAR data taken at 0.5m resolution, and plant functional types were assigned based on remote sensing data flown for the area. A suite of ParFlow simulations were run to evaluate the impact of a systematic loss of information on integrated hydrologic response. The importance of microtopography …
-
The role of rooting strategies on the eco-hydrology of semi-arid regions
… rooting profiles as a function of only the plant functional type of interest with no consideration for the soil texture or rainfall regime of the region being modeled. Additionally, these models do not incorporate the ability of vegetation to dynamically alter their rooting strategies in response …
-
Patterns of plant species richness and diversity across two habitat types in the Upper Karoo, South Africa
… cover, and growth form diversity in two habitat types (i.e. plains and rocky dolerite hillslopes), and along a longitudinal environmental gradient. A pairwise floristic survey approach was implemented, using modified Whittaker plots in each habitat type at 30 sites within the shale gas …
-
Bildung funktioneller Typgruppen des Phytoplanktons: Integration von Modell-, Freiland - und Laborarbeiten
Phytoplankter sind die bedeutendsten Primärproduzenten in aquatischen Ökosystemen und leisten ca. 45 % der globalen Primärproduktion. Sie weisen eine hohe taxonomische Diversität mit vielfältigen morphologischen und physiologischen Eigenschaften auf. Funktionelle Eigenschaften, die das licht-, …
Page 1 of 2