Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
-
- Aquatic insects (2)
- Secondary production (2)
- AFLP (1)
- Ammodramus caudacutus (1)
- Archived specimens (1)
-
- Aronia (1)
- Aronia melanocarpa (1)
- Aronia mitschurinii (1)
- Bayesian hierarchical models (1)
- Belding's ground squirrel (1)
- California (1)
- Canonical correspondence analysis (1)
- Channelization (1)
- Chokeberry (1)
- Co2 (1)
- Coastal salt marshes (1)
- Community classification (1)
- Copper River Delta (1)
- Diatoms (1)
- Dinoflagellates (1)
- Emissions (1)
- Estuarine (1)
- Functional feeding groups (1)
- GIS (1)
- Gut content analysis (1)
- Habitat use (1)
- Harmful algal bloom (HAB) (1)
- Hydropsychidae (1)
- Invertebrates (1)
- Lagoon (1)
Articles 1 - 13 of 13
Full-Text Articles in Life Sciences
Fine-Scale Genetic Structure And Parentage In Urocitellus Beldingi, Marissa R. Lafler
Fine-Scale Genetic Structure And Parentage In Urocitellus Beldingi, Marissa R. Lafler
Master's Theses
Urocitellus beldingi (Belding's ground squirrel), previously known as Spermophilus beldingi, is a social, montane rodent that occupies alpine and subalpine meadows in the Sierra Nevadas (Helgen et al. 2009). The Tioga Pass meadow (Mono Co. CA) population has been studied behaviorally and demographically for several decades. Microsatellites were developed for this species and conditions for polymerase chain reaction (PCR) were defined. Nine microsatellite loci amplified adequately and were in Hardy-Weinberg equilibrium, displaying an average heterozygosity of 0.67±0.19. These nine microsatellite loci were analyzed via PCR to elucidate the fine scale genetic structure, offering insight into population health, stochastic events, and …
Classifying And Mapping Diversity In A Species-Poor System: The Mangrove Meta-Community Of Laguna Chacahua National Park, Oaxaca, Mexico, Elizabeth Kay Weisgerber
Classifying And Mapping Diversity In A Species-Poor System: The Mangrove Meta-Community Of Laguna Chacahua National Park, Oaxaca, Mexico, Elizabeth Kay Weisgerber
Master's Theses
ABSTRACT
Classifying and Mapping Diversity in a Species-Poor System: the mangrove meta-community of Laguna Chacahua National Park, Oaxaca, Mexico
by
Elizabeth Kay Weisgerber
Both field transects and imagery grid plots were analyzed with the goal of creating a community classification map for the mangrove forest of Parque Nacional Lagunas de Chacahua. In total, data was collected in 49 sites throughout the park, recording measures such as DBH, basal area, estimated dominance, frequency, cover and relative dominance. Field locations were marked and georeferenced with a GPS and grid plots overlaid on satellite imagery of the park were generated via a random …
Aronia Mitschurinii: Solving A Horticultural Enigma, Peter J. Leonard
Aronia Mitschurinii: Solving A Horticultural Enigma, Peter J. Leonard
Master's Theses
Aronia (Medik.), commonly known as chokeberry, is a taxonomically misunderstood genus currently experiencing a renaissance in North America as both an ornamental and fruit crop. Three species of chokeberry are commonly accepted as native in North America: A. arbutifolia (L.) Pers. red chokeberry; A. melanocarpa (Michx.) Elliot, black chokeberry; and A. prunifolia (Marshall) Rehder, or purple chokeberry. In Europe a fourth species of human origin is recognized as Aronia mitschurinii (A.K.Skvortsov & Maitul.), or cultivated, black-fruited Aronia. It is widely speculated that this genotype originated in the early 20th century with Russian pomologist Ivan Michurin, as the product …
An Analytical Study Of Air-Sea Co2 Gas Exchange In The Northwest Mississippi Bight Region, Andrea Kathryn Braatz
An Analytical Study Of Air-Sea Co2 Gas Exchange In The Northwest Mississippi Bight Region, Andrea Kathryn Braatz
Master's Theses
With the continued increase of carbon dioxide (CO2) emissions, researchers are concerned with accumulation of excess CO2 within the atmosphere. The ocean is an important sink for the drawdown of atmospheric CO2 concentrations. Due to high spatial and temporal variability, CO2 fluxes in the coastal ocean are not as well characterized as those for the open ocean. More specifically, data for the northern Gulf of Mexico (GOM) coastal region is lacking. A time series analysis of air-sea CO2 flux rates from May through December 2009 was conducted using data collected by The University of Southern Mississippi’s Central Gulf Ocean Observing …
Mycorrhizal Colonization Of Native Salt Marsh Plants On Mississippi's Gulf Coast And The Effects Of Commercial Mycorrhizal Inoculants On Nursery-Grown Plants, Kathryn Rondot Mcbride
Mycorrhizal Colonization Of Native Salt Marsh Plants On Mississippi's Gulf Coast And The Effects Of Commercial Mycorrhizal Inoculants On Nursery-Grown Plants, Kathryn Rondot Mcbride
Master's Theses
Salt marshes are important economically and ecologically to the Gulf Coast and other coasts worldwide. Due to human activities, many coastal salt marshes have been degraded or destroyed. Restoration efforts, through the replacement or addition of naturally occurring salt marsh plants, are taking place worldwide. Most restoration plants are raised in nurseries and are not ready for transfer to restoration sites for eight or nine months. Once the plants are at the restoration site many die due to transplant stress. Arbuscular Mycorrhizal Fungi (AMF) may be able to shorten the time the restoration plants need to stay in the nursery …
Hydrologic Alteration And Sedimentation In The Upper Henry's Fork Watershed, Amelie Jeanne Charnaux
Hydrologic Alteration And Sedimentation In The Upper Henry's Fork Watershed, Amelie Jeanne Charnaux
Master's Theses
Hydrologic Alteration and Sedimentation in the Upper Henry’s Fork Watershed
Amelie Jeanne Charnaux
The Henry’s Fork of the Snake River is venerated by the global recreational community as one of the finest trout fishing streams on the planet. Furthermore, this remarkable waterway flows within the bounds of one of the most important ecological corridors in the equally world-renowned Greater Yellowstone Ecosystem. While the recreational and biological features of this corner of Idaho may capture the interest of the broader public, the waterway is equally significant to the livelihoods of local interests, such as the ranching and farming communities. With …
Harmful Algal Bloom (Hab) Communities And Co-Occurring Species In Relation To Near Shore Ocean Dynamics In San Luis Bay, California, Samuel Christopher Rankin
Harmful Algal Bloom (Hab) Communities And Co-Occurring Species In Relation To Near Shore Ocean Dynamics In San Luis Bay, California, Samuel Christopher Rankin
Master's Theses
The occurrence of phytoplankton taxa, with special focus on harmful algal bloom (HAB) taxa, was monitored for one year off the central coast of California to examine both their co-occurrence and physical and chemical variables influencing their temporal patterns. Bi-weekly samples were taken from October 6, 2008 to October 5, 2009 in San Luis Obispo Bay, CA. Canonical correspondence analysis (CCA) of weekly samples indicated that 46.1% of the variability in species abundance was explained by the variables in the model, higher than previous reports. Cluster analysis divided phytoplankton communities into HAB and non-HAB groups of species, while shared distribution …
Modeling Saltmarsh Sparrow Distribution In Connecticut, Susan T. Meiman
Modeling Saltmarsh Sparrow Distribution In Connecticut, Susan T. Meiman
Master's Theses
To develop a map that would predict where saltmarsh sparrows live and reproduce in Connecticut, I compared models to test a) whether field data or remote-sensing data most effectively characterized within-marsh conditions that relate to sparrow occurrence, and b) whether including landscape-level variables improved model fit. The best sparrow presence model used a variable derived from raw spectral reflectance values associated with plots where sparrows did not occur, while the best nest presence model used a combination of vegetation structure descriptions. A second nest model, built using high resolution remote sensing data that organized marsh characteristics into high and low …
The River Continuum Redux: Aquatic Insect Diets Reveal The Importance Of Autochthonous Resources In The Salmon River, Idaho, Kathryn Vallis
The River Continuum Redux: Aquatic Insect Diets Reveal The Importance Of Autochthonous Resources In The Salmon River, Idaho, Kathryn Vallis
Master's Theses
Along a river network, changes in the physical characteristics of a stream - changes articulated by the River Continuum Concept (RCC) - have been predicted to influence stream food webs, particularly the resources supporting aquatic macroinvertebrates. Although diets of macroinvertebrates can track resource availability along the longitudinal gradient of streams, insect diets were not assessed in the original RCC study; rather, insects were grouped into functional feeding groups (FFGs). In addition, global climate change is increasing the frequency and spatial extent of wildfire and beetle outbreaks throughout the western United States and could affect riparian vegetation and the amount of …
Cattail (Typha X Glauca) Invasion In Wetlands Of The Great Lakes Region: Are Impacts Time-Dependent?, Mark Edwin Mitchell
Cattail (Typha X Glauca) Invasion In Wetlands Of The Great Lakes Region: Are Impacts Time-Dependent?, Mark Edwin Mitchell
Master's Theses
Some species introduced into new regions have the potential to greatly impact native diversity and ecosystem functioning. The invasive hybrid cattail, Typha X glauca, has established in wetlands across the Great Lakes region decreasing native plant diversity and altering soil and microsite characteristics. We utilized 80 years of historical aerial photographs from the Illinois Beach State Park wetland complex to map the spread and determine the age of T. X glauca stands. Floristic, edaphic, and environmental data were collected from plots across an invasion-age gradient to determine the impacts of T. X glauca and time since invasion on environmental variables. …
Community Structure And Secondary Production Of Aquatic Macroinvertebrates In Coastal Wetland Ponds Of The West Copper River Delta, Alaska, Following Tectonic Uplift, Ryan Glen Van Duzor
Community Structure And Secondary Production Of Aquatic Macroinvertebrates In Coastal Wetland Ponds Of The West Copper River Delta, Alaska, Following Tectonic Uplift, Ryan Glen Van Duzor
Master's Theses
The Great Alaska Earthquake of 1964 (magnitude 9.2) greatly altered the coastal landscape in southcentral Alaska and had particularly dramatic effects on the Copper River Delta (CRD), an ecologically and economically important area within the Chugach National Forest. The earthquake caused tectonic uplift (up to 3.5m) of the CRD coastal tidal marsh and transformed it into a perched freshwater marsh. Copper River Delta ponds, which are crucial habitat to a myriad of migrating songbirds, shorebirds, and waterfowl, are of particular interest to wildlife managers in the CRD and along the Pacific coasts of North, Central and South America. This study …
Stream Restoration In A Post-Agricultural System: Indirect Effects On Density And Secondary Production Of Aquatic Insects, Lyle Stanley Dandridge Jr
Stream Restoration In A Post-Agricultural System: Indirect Effects On Density And Secondary Production Of Aquatic Insects, Lyle Stanley Dandridge Jr
Master's Theses
Restoration of stream habitats, with the goal of increasing biodiversity through increasing habitat heterogeneity, has been an ongoing trend in recent decades. Current investigations suggest most of those projects fail to significantly influence ecological structure and function when evaluated in light of their affect on species richness. In order to assess the <&ldquo>success of restoration on a prairie stream in northern Illinois traditional metrics such as community composition and density were examined in addition to macroinvertebrate secondary production. Restoration of Nippersink Creek, McHenry County, Illinois was completed in 2000 and this study was conducted 8 years post-restoration. Benthic samples were …&ldquo>
Investigation Of A Pharmaceutical Compound With Artificial Streams: Effects Of The Antihistamine Cimetidine On Stream Ecosystem Function., Paul David Hoppe
Investigation Of A Pharmaceutical Compound With Artificial Streams: Effects Of The Antihistamine Cimetidine On Stream Ecosystem Function., Paul David Hoppe
Master's Theses
Pharmaceutical compounds have been widely detected in surface waters but their effects on stream ecosystems are unknown. Cimetidine (Tagamet®), a widely used H2 histamine antagonist has been detected in surface waters. To measure chronic effects of cimetidine on stream invertebrates, I conducted a long-term (83d) artificial-stream experiment. A range of cimetidine concentrations (0.07 μg L-1 to 70.0 μg L-1) were added to streams supporting populations of the amphipod Gammarus fasciatus and beetle Psephenus herricki. P. herricki individual growth rates were reduced in the presence of cimetidine, but G. fasciatus individual growth rates were not different among treatments. G. fasciatus size …