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 50 for “"Key species"”.
-
Developing a guidebook for an outdoor classroom
Field guide -- Map -- Nature trail plant species -- Plant identification key -- Species test plot -- Climate -- Cloud identification -- Desert soils -- Tortoise station -- Animal track and pond.
-
Developing a guidebook for an outdoor classroom
Field guide -- Map -- Nature trail plant species -- Plant identification key -- Species test plot -- Climate -- Cloud identification -- Desert soils -- Tortoise station -- Animal track and pond.
-
Species distribution, abundance and conservation in Nakai-nam Theun National Protected Area, Central-Eastern Laos: Implications for future local wildlife conservation project
… for wildlife conservation, (2) to identify the key species for which NNT NPA is a priority for their conservation, (3) to use the data collected to develop a long-‐term project in the area for research and conservation. In addition to this local-‐level case study, I aimed (4) to identify the …
-
The population Biology of Sclerocarya birrea at Nylsvley Nature Reserve, Limpopo Province, South Africa
… of Sclerocarya birrea (A Rich) Hochst., subspecies caffra (Sond) at Nylsvley Nature Reserve, Limpopo, South Africa. Sclerocarya birrea is a keystone plant species which is rated as one of the most highly valued indigenous trees because of its multiple uses. It is identified as a key species …
-
Iodine in sea ice and the polar atmosphere.
… in the Weddell Sea have implicated I2 as a key species in the mechanism of enhancement of atmospheric iodine in this region. Organic and inorganic forms of iodine were measured in seawater, sea ice and the atmosphere. On the Brunt ice shelf, enhanced concentrations of CH3I and C2H5I were …
-
The energetics of sociality in the molerats (Bathyergidae)
… Heterocephalus). Sufficient ecological data on key species (e.g., Cryptomys damarensis) were obtained to confirm trends in resource distributions associated with an aridity gradient and increasing sociality. This included data on resource characteristics, seasonal soil and burrow temperature …
-
Examining the Molluscan Biostratigraphy of the Upper Cretaceous Judith River Formation, Montana
… located. Correlating the distribution of the species identified by Stanton and Hatcher could lead to a hypothesis of where in the Judith River Formation Hayden had collected what became type specimens. Examining the published literature on the Judith River Formation was Phase 1 of this …
-
Vegetation patterns and plant reproductive processes in the succulent Karoo
… and competition in explaining variation in species distributions. The aim was to investigate changes in soil properties associated with species turnover (replacement series). Patterns of species abundances have been attributed to cyclic succession driven by disturbance and inter-specific …
-
A kinetic and spectroscopic study of chemistry relating to the atmospheric role of iodine species
… fundamental atmospheric chemistry of halogen species is included in global tropospheric models. Spectroscopic measurements of the concentration of halogen species within the Earth's atmosphere, and the accurate determination of kinetic information regarding the rates and mechanisms of chemical …
-
From landscape to freshwater invertebrates: understanding the effects of peatland restoration on Atlantic Salmon (Salmo salar) habitat in the Flow Country
… impact on freshwater ecosystems, including key species such as salmon, should not be detrimental when good restoration practices are implemented. We also found evidence that peatland catchments with anthropogenic modifications have salmon populations that are more sensitive to extreme …
-
Scoping of Presence and Impacts of Tyre Wear Particles on Soil Systems
… ecotoxicological assessments, Eisenia fetida, a key species for agricultural production (Jing et al., 2023), were exposed to TWPs and examined their behaviours when contacting to the particles. Then, their bodies were investigated histologically to observe changes in seminal vesicle structures. …
-
Supramolecular quantum dot-porphyrin assemblies for biological oxygen sensing
… a spatiotemporal map of the concentration of key species to assess and quantify tumor growth, metabolism, and response to therapy. Because the tumor microenvironment is characterized by hypoxia, the concentration of oxygen is an important indicator of tumor health. Understanding how this …
-
The occurrence and distribution of microplastics in surficial sediments and fish in a South African reservoir
… contamination. Furthermore, I exposed a key species, the banded Tilapia sparrmanii (i.e. Smith 1940) to different concentrations of microplastics particles. Tilapia consumed microplastics even when relatively rare in their environment, and consumption rates related negatively to …
-
Evolutionary and Developmental Survey of Genes Involved in Chordate Pigmentation
… evolutionary scenario of Rab family in eleven species of metazoans, spanning from cnidarians to human. Phylogeny, intron code and synteny conservation prompted me to depict Rab evolution, with a special focus on chordates that exhibit a highly dynamic evolutionary pattern. <br></br><br></br> I …
-
The Evolution of Ribosome Assembly: Making Ribosomes in the Mitochondria
… analysis of assembly pathways in these 2 key species (Chapter 4) reveal conserved and unique features of mtSSU assembly in both species. By comparing conserved mechanisms of assembly within the mitochondria of these 2 species to their bacterial homologs, we shed light into the evolution of …
-
Response of pteropod and related faunas to climate change and ocean acidification
… water carbonate saturation. Abundances of key species were also found to constrain palaeotemperatures better than planktic foraminifera, a use which could be further developed.
-
Assessing The Biophysical Naturalness Of Grassland In Eastern North Dakota With Hyperspectral Imagery
<p>Over the past two decades, non-native species within grassland communities have quickly developed due to human migration and commerce. Invasive species like Smooth Brome grass (Bromus inermis) and Kentucky Blue Grass (Poa pratensis), seriously threaten conservation of native grasslands. This …
-
Variabilité des concentrations cellulaires phytoplanctoniques de diméthylsulfoniopropionate (DMSP) et de diméthylsulfoxyde (DMSO) en Baie Sud de la Mer du Nord
… Phaeocystis globosa (P. globosa). This species is a known high dimethylsulfoniopropionate (DMSP) producer whose bloom accounts for 95% of spring phytoplankton biomass. An increase in DMS(P) and its oxidation product dimethylsulfoxide (DMSO) cellular contents have been frequently observed …
-
Density, Shell Use and Species Composition of Juvenile Fiddler Crabs (Uca Spp.) at Low and High Impact Salt Marshes on Georgia Barrier Islands
… wetlands offer refuge for juveniles of many species, with protection often coming in the form of dense vegetation. Human impacts have led to a 67% loss of coastal wetlands worldwide in the past 300 years, thus decreasing available refuges. There are no studies that show what affect this has …
-
The Effects of Temperature Slip on the Modeling of Systems With Heterogeneous and Homogeneous Reactions
… of temperature slip on the concentrations of key species and on the growth or conversion rate are discussed. A two-temperature model is proposed to investigate the effects of temperature slip in these systems. The results suggest that neglecting temperature slip in modeling these systems can …
Page 1 of 3