The Once And Future Great Lakes Country: An Ecological History By John L. Riley, 2017 Redeemer University College
The Once And Future Great Lakes Country: An Ecological History By John L. Riley, Deborah C. Bowen
Review of John L. Riley's The Once and Future Great Lakes Country: An Ecological History.
Ecology Of The Young-Of-The-Year Emerald Shiner (Notropis Atherinoides) In The Upper Niagara River, New York: Growth, Diversity, And Importance As A Forage Species, 2017 State University of New York College at Buffalo
Ecology Of The Young-Of-The-Year Emerald Shiner (Notropis Atherinoides) In The Upper Niagara River, New York: Growth, Diversity, And Importance As A Forage Species, Jacob L. Cochran
Great Lakes Center Masters Theses
The emerald shiner (Notropis atherinoides) is a relatively understudied Cyprinid that fills a major keystone role in the Niagara River. Little is known about the emerald shiner’s early life history, such as the ecology of their larval and juvenile stages, which is the focus of this study. In the upper Niagara River, larvae first recruited into sampling gear in early July at a mean water temperature of 23oC, with larvae appearing into August. Young-of-the-year (YOY) emerald shiners grew an average of 1.5 mm and 31.5 mg a week throughout the growing season with condition peaking ...
An Evaluation Of The Emerald Shiner (Notropis Atherinoides) As A Bioindicator Of Urban Water Pollution In The Upper Niagara River, 2017 State University of New York College at Buffalo
An Evaluation Of The Emerald Shiner (Notropis Atherinoides) As A Bioindicator Of Urban Water Pollution In The Upper Niagara River, Rebecca J. Johnson
Great Lakes Center Masters Theses
Using fishes as bioindicator species can be an effective method for detecting poor water quality in aquatic ecosystems. In the Niagara River, the emerald shiner (Notropis atherinoides) is a keystone species that is sensitive to ecosystem degradation and, therefore, fills the bioindicator role. Like other model bioindicators, emerald shiners are abundant and, when exposed to a persistent disturbance, exhibit individual signs of stress before the onset of population decline. This research evaluated the health of emerald shiners captured from the upper Niagara River, which is at times inundated with untreated sewage from combined sewer overflows (CSOs). Water samples were taken ...
Synergistic Use Of Remote Sensing And Modeling To Assess An Anomalously High Chlorophyll-A Event During Summer 2015 In The South Central Red Sea, Wenzhao Li, Hesham El-Askary, K. P. Manikandan, Mohamed A. Qurban, Michael J. Garay, Olga V. Kalishnikova
Mathematics, Physics, and Computer Science Faculty Articles and Research
An anomalously high chlorophyll-a (Chl-a) event (>2 mg/m3) during June 2015 in the South Central Red Sea (17.5° to 22°N, 37° to 42°E) was observed using Moderate Resolution Imaging Spectroradiometer (MODIS) data from the Terra and Aqua satellite platforms. This differs from the low Chl-a values (<0.5 mg/m3) usually encountered over the same region during summertime. To assess this anomaly and possible causes, we used a wide range of oceanographical and meteorological datasets, including Chl-a concentrations, sea surface temperature (SST), sea surface height (SSH), mixed layer depth (MLD), ocean current velocity and aerosol optical depth (AOD) obtained from different sensors and models. Findings confirmed this anomalous behavior in the spatial domain using Hovmöller data analysis techniques, while a time series analysis addressed monthly and daily variability. Our analysis suggests that a combination of factors controlling nutrient supply contributed to the anomalous phytoplankton growth. These factors include horizontal transfer of upwelling water through eddy circulation and possible mineral fertilization from atmospheric dust deposition. Coral reefs might have provided extra nutrient supply, yet this is out of the scope of our analysis. We thought that dust deposition from a coastal dust jet event in late June, coinciding with the phytoplankton blooms in the area under investigation, might have also contributed as shown by our AOD findings. However, a lag cross correlation showed a two- month lag between strong dust outbreak and the high Chl-a anomaly. The high Chl-a concentration at the edge of the eddy emphasizes the importance of horizontal advection in fertilizing oligotrophic (nutrient poor) Red Sea waters.
Investigating The Role Of Long Distance Dispersal In The Response Of Stream Fishes To Urbanization, 2017 Kennesaw State University
Investigating The Role Of Long Distance Dispersal In The Response Of Stream Fishes To Urbanization, Andrea Davis
Master of Science in Integrative Biology Theses
I conducted a 7-month mark-recapture study in two watersheds differing in urban impact in order to assess the role that long distance dispersal plays in the response of tolerant stream fishes to urbanization. Our two stream sites included a heavily impacted urban stream (watershed impervious surface cover ~30%) and a mildly impacted rural stream (watershed impervious surface cover ~6%). Species of interest were marked with 12mm HPT PIT tags and included a specialist, Campostoma oligolepis (n=189 urban site, 200 rural site) and a generalist, Lepomis auritus (n=136 urban site, 182 rural site). Three resampling instances for each site ...
Wildlife Usage Of Plant Species Utilized By The Eastern Box Turtle (Terrapene Carolina Carolina) - Version I, 2017 West Chester University of Pennsylvania
Wildlife Usage Of Plant Species Utilized By The Eastern Box Turtle (Terrapene Carolina Carolina) - Version I, Nur Ritter
Gordon Natural Area Herpetological Studies Documents
No abstract provided.
Analysis Of Population Structure In A California Newt (Taricha Torosa) Metapopulation, 2017 Western Kentucky University
Analysis Of Population Structure In A California Newt (Taricha Torosa) Metapopulation, Jessica Vincent
Honors College Capstone Experience/Thesis Projects
As anthropogenic influences take an ever-increasing toll on the environment, understanding how environmental change affects species is paramount. Concern regarding decline in amphibian populations has spurred research examining the effects of habitat change on the dynamics of populations at landscape levels. One important goal is to understand how gene flow among populations is affected by changes in habitat. Biologists need to consider the relationship between gene flow and habitat alterations so that movements among individual breeding ponds can be maintained over time, reducing risk of local extinction events. This study focuses on patterns of gene flow among thirteen populations of ...
Continuous, Pulsed And Disrupted Nutrient Subsidy Effects On Ecosystem Productivity, Stability, And Energy Flow, 2017 South Dakota State University
Continuous, Pulsed And Disrupted Nutrient Subsidy Effects On Ecosystem Productivity, Stability, And Energy Flow, Michael J. Weber, Michael L. Brown
Michael J Weber Dr
Resource pulses and subsidies can supply ecosystems with an important source of nutrients that supports additional productivity at multiple trophic levels. Common carp Cyprinus carpio provide ecosystems with a continuous nutrient subsidy through bioturbation and excretion but may also initiate a nutrient pulse through carcass decomposition. We examined how continuous (common carp foraging and excretion), pulsed (carcass decomposition) and disrupted (carp introduced and then removed) nutrient subsidies differed in their ability to alter nutrient availability, ecosystem productivity and stability and energy flow. Nitrogen and phosphorus availability and primary production were highest in pulsed, intermediate in continuous and lowest for disrupted ...
, Brooke Love, Colleen O'Brien, Douglas Bulthuis
It has been suggested that photosynthetic activity of macrophytes in coastal areas can decrease pCO2 and may provide areas of refuge for organisms sensitive to ocean acidification. To assess the effect of a large eel grass meadow on water chemistry, discreet samples were collected hourly over several 24 hour cycles in Padilla Bay, WA. Calculated pCO2 ranged from less than 100 ppm to greater than 700 ppm, often over the course of only a few hours. Aragonite saturation, DIC and pH were also highly variable. These data, weather station data and in-situ sensors(Padilla Bay National Estuarine Research Reserve) were ...
Phenotypic Plasticity Of Native Vs. Invasive Purple Loosestrife: A Two-State Multivariate Approach, 2017 Iowa State University
Phenotypic Plasticity Of Native Vs. Invasive Purple Loosestrife: A Two-State Multivariate Approach, Young Jin Chun, Michael L. Collyer, Kirk A. Moloney, Jason D. Nason
Jason D Nason
The differences in phenotypic plasticity between invasive (North American) and native (German) provenances of the invasive plant Lythrum salicaria (purple loosestrife) were examined using a multivariate reaction norm approach testing two important attributes of reaction norms described by multivariate vectors of phenotypic change: the magnitude and direction of mean trait differences between environments. Data were collected for six life history traits from native and invasive plants using a split-plot design with experimentally manipulated water and nutrient levels. We found significant differences between native and invasive plants in multivariate phenotypic plasticity for comparisons between low and high water treatments within low ...
Attracting Birds To Your Yard, 2017 Iowa State University
Attracting Birds To Your Yard, Shane Patterson, Adam Janke, Georgia Bryan, James Pease, Karl Jungbluth
Birds capture the imagination of homeowners from all walks of life. A glance out a window during fall or spring may reveal a pinstriped blackpoll warbler busily feeding during a break from migratory flights that take it to places as far away as the boreal forests of Canada or the mountain forests of South America. Lifeless and cold winter days may be enhanced by the company of a flock of chickadees. A morning on the back porch may turn into a front seat for the first attempts at flight by recently hatched robins. Backyard habitats are important resources for many ...
Windbreaks For Wildlife, 2017 Iowa State University
Windbreaks For Wildlife, Adam Janke
Trees and shrubs planted in windbreaks have many on-farm benefits such as reducing energy consumption, controlling odor, protecting buildings and livestock from snow and wind, and improving aesthetics. Another rewarding benefit of windbreaks is to provide habitat for wildlife. In this fact sheet, we discuss ways to improve the suitability of windbreaks for wildlife while retaining other desired benefits.
Assessing And Mitigating The Environmental Impacts Of Shipping In The Arctic, 2017 World Maritime University
Assessing And Mitigating The Environmental Impacts Of Shipping In The Arctic, Lilitha Pongolini, Jonas Pålsson, Jennie Folkunger, Jennie Larsson, Anne Bouyssou, Lawrence Hildebrand, Neil Bellefontaine
Assessing and mitigating the environmental impacts of shipping in the Arctic
Report by World Maritime University for the Total Foundation project "Assessing and mitigating the environmental impacts of shipping in the Arctic - Focus on the introduction of invasive species and pathogens".
Long-Term Spatial Heterogeneity In Mallard Distribution In The Prairie Pothole Region, 2017 Iowa State University
Long-Term Spatial Heterogeneity In Mallard Distribution In The Prairie Pothole Region, Adam K. Janke, Michael J. Anteau, Joshua D. Stafford
The Prairie Pothole Region (PPR) of north-central United States and south-central Canada supports greater than half of all breeding mallards (Anas platyrhynchos) annually counted in North America and is the focus of widespread conservation and research efforts. Allocation of conservation resources for this socioeconomically important population would benefit from an understanding of the nature of spatiotemporal variation in distribution of breeding mallards throughout the 850,000 km2 landscape. We used mallard counts from the Waterfowl Breeding Population and Habitat Survey to test for spatial heterogeneity and identify high- and low-abundance regions of breeding mallards over a 50-year time series. We ...
Response Of Littoral Invertebrates To Reduction Of Fish Density: Simultaneous Experiments In Ponds With Different Fish Assemblages, 2017 United States Geological Survey
Response Of Littoral Invertebrates To Reduction Of Fish Density: Simultaneous Experiments In Ponds With Different Fish Assemblages, Clay L. Pierce, Bruce D. Hinrichs
Clay L. Pierce
We experimentally reduced densities of predatory fish in replicated 2 m2 areas of the littoral zone in two ponds to test whether density and biomass of invertebrates would respond to release from fish predation. The ponds are of similar size and in close proximity, but support different fish assemblages: bluegills (Lepomis macrochirus Rafinesque) and largemouth bass (Micropterus salmoides (Lacepede)) in one pond, and bluespotted sunfish (Enneacanthus gloriosus (Holbrook)) and chain pickerel (Esox niger Lesueur) in the other. Fish densities were reduced to less than 15% of ambient levels in both experiments. In the bluegill–bass pond, density and biomass of ...
Back-Calculation Of Fish Length From Scales: Empirical Comparison Of Proportional Methods, 2017 National Biological Service
Back-Calculation Of Fish Length From Scales: Empirical Comparison Of Proportional Methods, Clay L. Pierce, Joseph B. Rasmussen, William C. Leggett
Clay L. Pierce
We compared three proportional back-calculation methods for scales using data sets for pumpkinseeds Lepomis gibbosus and golden shiners Notemigonus crysoleucas from 10 southern Quebec lakes, and we validated back-calculations by comparing them with observed lengths at lime of annulus formation. Ordinary least-squares regression (OR) was compared with geometric mean regression (GMR) for describing body-scale relationships. Although minor differences were detected in body-scale regressions among lakes, pooling data across lakes yielded linear bodyscale relationships with very high r2. Differences between OR and GMR body-scale relationships were negligible in both species. Likewise, all back-calculation methods produced equivalent results. Back-calculated lengths generally corresponded ...
Status Of The Topeka Shiner In West-Central Iowa, 2017 Iowa State University
Status Of The Topeka Shiner In West-Central Iowa, Bryan David Bakevich, Clay L. Pierce, Michael C. Quist
Clay L. Pierce
The Topeka shiner Notropis topeka is a federally endangered fish species that is estimated to occupy only 20% of its historic range. In Iowa Topeka shiners have been in decline for decades. Our goal was to determine the present distribution of Topeka shiners in the west-central portion of their range in Iowa and to characterize the extent of its decline. We compared the current distribution to distributions generated from earlier collections. We found Topeka shiners in six of 22 watersheds where they occurred historically. Status of Topeka shiners was judged to be stable in 27% of the watersheds, at risk ...
Hydrological Alteration Along The Missouri River Basin: A Time Series Approach, 2017 United States Geological Survey
Hydrological Alteration Along The Missouri River Basin: A Time Series Approach, Mark A. Pegg, Clay L. Pierce, Anindya Roy
Clay L. Pierce
Human alteration of large rivers is commonplace, often resulting in significant changes in flow characteristics. We used a time series approach to examine daily mean flow data from locations throughout the mainstem Missouri River. Data from a pre-alteration period (1925–1948) were compared with a post-alteration period (1967–1996), with separate analyses conducted using either data from the entire year or restricted to the spring fish spawning period (1 April–30 June). Daily mean flows were significantly higher during the post-alteration period at all locations. Flow variability was markedly reduced during the post-alteration period as a probable result of flow ...
Seeding Method Influences Warm-Season Grass Abundance And Distribution But Not Local Diversity In Grassland Restoration, Kathryn A. Yurkonis, Brian J. Wilsey, Kirk A. Moloney, Pauline Drobney, Diane L. Larson
Brian J. Wilsey
Ecological theory predicts that the arrangement of seedlings in newly restored communities may influence future species diversity and composition. We test the prediction that smaller distances between neighboring seeds in drill seeded grassland plantings would result in lower species diversity, greater weed abundance, and larger conspecific patch sizes than otherwise similar broadcast seeded plantings. A diverse grassland seed mix was either drill seeded, which places seeds in equally spaced rows, or broadcast seeded, which spreads seeds across the ground surface, into 24 plots in each of three sites in 2005. In summer 2007, we measured species abundance in a 1 ...
Long-Term Records Of Climate-Induced Changes In The Zooplankton Of West-Greenland Lakes, 2017 Dickinson College
Long-Term Records Of Climate-Induced Changes In The Zooplankton Of West-Greenland Lakes, Helen Schlimm
Student Honors Theses By Year
Recent research documents climate-induced changes in the algal communities of West Greenland lakes; however, less is known about the response of zooplankton to climate change effects in this region. Zooplankton are predominantly the top predator in these lakes, and thus may be changing due to direct climate effects on physical lake habitat and chemistry or indirect effects on their food source. Cladoceran remains from two lake sediment cores were collected in the Kangerlussuaq region of southwest Greenland: SS1341, located midway between the Greenland ice sheet and the coast, and SS901, close in proximity to the ice sheet. Modern zooplankton data ...