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 19 of 19 for “"mountain stream"”.
-
A study of a Cape mountain stream ecosystem and its response to fire
… findings of a two-year (1986-1988) study of a mountain stream draining a small catchment in the south-western Cape, South Africa. The catchment was deliberately burnt half-way through the study period. The study was undertaken because although fire is a major natural disturbance, and also a …
-
The effect of regulation by two impoundments on an acid, blackwater, Cape mountain stream
… a fuller understanding of the effects of stream regulation but has also provided a setting for testing and developing basic theories of stream ecology. Two important concepts in stream ecology, the River Continuum Concept (RCC) and the Serial Discontinuity Concept (SOC), required …
-
Short-term response of a mountain stream to a sediment pulse and a major flood
… 10 and 50 years. To understand the nature of the stream’s response to these events, I took advantage of two close-range remote sensing techniques, terrestrial LiDAR (TLS) and Structure-from-Motion (SfM). Data collected during two subsequent summers enabled me to map two reaches of Sullivan Creek …
-
ECOTOXICOLOGICAL IMPACTS OF RUN-OF-RIVER DAMS ON THE AMERICAN DIPPER (CINCLUS MEXICANUS) AND MOUNTAIN STREAM FOOD WEBS
… increasingly common alternate energy source on mountain streams. Despite reductions in size and greenhouse gas emissions compared to conventional impoundments, RoR dams may have ecotoxicological impacts through disruption of the natural flow regime. The American Dipper (Cinclus mexicanus) is a …
-
Spontaneous succession of riparian vegetation and aquatic macroinvertebrates along the Silvermine River, South Africa, after fire and clearing of exotic plant species
… along the river. Site I was situated in the mountain stream zone, while Sites 2 and 3 were situated in the foothills. Changes in the riverine ecosystem and its associated habitats were compared to reference condition data for each of the three components from each study site. There were no …
-
An ecological study of the macro-invertebrate fauna of the Eerste River, Western Cape Province, South Africa
… be divided into three physical/biotic zones: The Mountain Stream, Upper River and Lower River zones. Investigations of the abundance, biomass, species diversity and species composition of the benthic macro-invertebrates in the three zones were carried out in 1975/76. Spatial and temporal changes …
-
Evaluating Geomorphic Change in Little Creek Using Repeated Cross-Sectional and Longitudinal Profile Surveys
… were established in 2002 along a forested mountain stream (gradients range from 0.02 to 0.05) on Cal Poly's Swanton Pacific Ranch in Santa Cruz County, California. These study reaches are a component of paired and nested watershed studies in the approximately 500 hectare Little Creek …
-
Field- and laboratory-determined behavioral avoidance and gill histological alterations of fish in response to acidic and alkaline pH conditions
… alkaline pH excursions of fish populations in streams receiving fly ash settling basin effluent. Fish communities were sampled above and below the effluent outfall in a mountain stream, Adair Run, adjacent to the coal-fired Glen Lyn Power Plant in southwestern Virginia. This effluent, which …
-
Modelling and managing the effects of trout farms on Cape rivers
… in the structure of the communities form upstream to downstream of the effluent outlets. Those farms situated on mountain streams had the greatest impact and those on the downstream foothill had a lesser impact. The reduced impact in the foothill zone was probably because these reaches were …
-
Seasonal Microhabitat Use of Young-of-the-Year Bull Trout, Salvelinus Confluentus, in a Drought Year
… of 2015 in Gold Creek, a third order Cascade Mountain stream near Snoqualmie Pass, WA. It is crucial to understand YOY habitat requirements, as this life stage is highly vulnerable to fluctuations in streamflow and various ecological risks associated with their dispersal. Previous research has …
-
Taxonomia, variação morfológica e distribuição geográfica das espécies do grupo Hyla circumdata (Cope, 1870) (Amphibia, Anura, Hylidae)
… eleven species, which are distributed over mountain stream habitats in Atlantic Tropical Forest, with altimetric range over 500 m. This group is diagnosed by transverse bands on the posterior surface of thighs and hypertrophied prepollex. However, this diagnosis comprises other groups, as H. …
-
A Trickle Runs Through It: An Environmental History of the Santa Fe River, New Mexico
… the Santa Fe River's evolution from clear mountain stream to dewatered urban ditch is closely tied to basin physiography and landscape processes, governmental and demographic changes, and the conflicting ideologies dividing its finite waters. This research underscores the connection between …
-
Ecology and energetics of an aquatic detritivore, Pteronarcys proteus (Plecoptera: Pteronarcyidae)
… life cycle lasted four years in an Appalachian mountain stream in southwestern Virginia. Adults emerged late May to early June, and eggs deposited did not hatch until the following spring. Nymphs grew at least 3 years with 12 male instars and 13 female instars. The nymphal diet was primarily …
-
Headwater stream network connectivity: biogeochemical consequences and carbon fate
… simple nor static environments. Heterogeneous stream corridors constitute the majority of river network length and regulate cycling of carbon and oxygen as they expand and contract their connections across the landscape. Though headwater streams integrate many biogeochemical signals from the …
-
Multispecies toxicity tests using indigenous organisms: predicting the effects of hazardous materials in streams
… to determine which of the following artificial stream designs would be most logistically simple yet effective in maintaining riffle insects during a 30-d bioassay: 1) static and no current (S-NC); 2) flow-through and no current (FT-NC); 3) static with current (S-C); or 4) flow-through with …
-
Relationships between flood frequency and riparian plant community structure in mountain streams of western Montana
… plant communities along large, low elevation streams, but it is less clear what role flooding plays in the structure and composition of riparian plant communities along mountain streams. In the first part of this study, I examined the influence of four environmental variables (flood frequency, …
-
Relationships between flood frequency and riparian plant community structure in mountain streams of western Montana
… plant communities along large, low elevation streams, but it is less clear what role flooding plays in the structure and composition of riparian plant communities along mountain streams. In the first part of this study, I examined the influence of four environmental variables (flood frequency, …
-
Characterizing flow resistance in high gradient mountain streams, Fraser Experimental Forest, Colorado
High gradient mountain streams dissipate energy when water flows over poorly sorted grains in the bed and banks and over bedforms such as steps and pools, creating a constant alternation between supercritical and subcritical flow and causing energy dissipation through hydraulic jumps. Mountain …
-
Potential Effects of Forestry Best Management Practices and Implementation Rates on Soil and Water Resources in the Southeastern United States
… erosion and potential sediment delivery to streams. Skid trails, stream crossings, forest roads, decks, and harvest areas are major forest operational features that have the potential to erode and deliver sediment to streams. These five features are also common BMP categories evaluated by …