Do Enallagma Exsulans From Streams And Lakes Show Patterns Of Divergence?,
2019
University of Arkansas, Fayetteville
Do Enallagma Exsulans From Streams And Lakes Show Patterns Of Divergence?, Savannah Rae Graham
Graduate Theses and Dissertations
Divergent selection across heterogenous environments could lead to adaptive divergence in populations resulting in potential local adaption. These populations have phenotypic differences that are fitness related and make native individuals more fit than non-native individuals. My research focuses on a species of damselfly, Enallagma exsulans, to explore local adaptation and morphological differences as a result of divergent selection or plasticity. My first study explored potential local adaptation of wild caught stream and lake E. exsulans using a reciprocal transplant design, a classic approach for this objective. The stream and lake sites chosen were on a small spatial scale allowing for …
Effects Of Disturbance And Restoration Treatment On Fertile Islands In Lake Mead National Recreation Area,
2019
University of Nevada, Las Vegas
Effects Of Disturbance And Restoration Treatment On Fertile Islands In Lake Mead National Recreation Area, Camille Traylor
UNLV Theses, Dissertations, Professional Papers, and Capstones
Disturbances by humans are one of the main drivers of change in contemporary desert ecosystems. Restoration treatments such as topsoil application and outplanting can be implemented in response to disturbances in order to maintain soil stability and a diverse plant community. Fertile islands - nutrient enriched areas beneath perennial shrubs - are fundamental features of deserts that can facilitate annual plant growth. A major uncertainty in desert ecology is how much time is required for fertile islands and nurse plant effects (the facilitation of one plant by another) to develop below maturing perennial plants. By studying naturally recruited perennial plants …
Long-Term Monitoring Of Rare Gypsum Communities In The Eastern Mojave Desert: A Study In Science And Art,
2019
University of Nevada, Las Vegas
Long-Term Monitoring Of Rare Gypsum Communities In The Eastern Mojave Desert: A Study In Science And Art, Tiffany Jane-Marie Pereira
UNLV Theses, Dissertations, Professional Papers, and Capstones
For land managers, reliable estimates of soil seed banks, and more specifically, change in seed banks over time, provide insight into the restoration and regeneration potential of the landscape, site history and disturbance mapping, and, invasive and rare plant management. To understand the intricacies of desert soil seed banks in relation to aboveground vegetation change, my research evaluated long-term change in soil seed banks, fertile islands, and plant communities of conservation-priority gypsum rare plant habitat of the eastern Mojave Desert. Research found significant spatial and temporal differences in seed bank composition and density over an 11-year period; however, the gypsum …
Reassessment Of The Extinction Risk Of The Neotropical Freshwater Crabs Of The Family Pseudothelphusidae,
2019
Northern Michigan University
Reassessment Of The Extinction Risk Of The Neotropical Freshwater Crabs Of The Family Pseudothelphusidae, Ada Acevedo Alonso
All NMU Master's Theses
The Neotropical region is one of the world’s biodiversity hotspots, and its freshwater crabs are notably diverse, and are represented by two families, Pseudothelphusidae and Trichodactylidae. This study focuses on this region’s highly diverse Pseudothelphusidae which includes 48 genera and 289 species. The 2008 IUCN global conservation assessment found 15.5% of the Pseudothelphusidae to be threatened with extinction and projected that in the worst-case scenario (if all of the Data Deficient species turned out to be threatened), the number of threatened species would be significantly higher. In the last decade several new species of pseudothelphusids have been described, and more …
Presence And Distribution Of Leptodactylus Guianensis Heyer And De Sa, 2011 In Colombia: Comparisons With Other Species In The L. Latrans Group.,
2019
University of Richmond
Presence And Distribution Of Leptodactylus Guianensis Heyer And De Sa, 2011 In Colombia: Comparisons With Other Species In The L. Latrans Group., Mariela Osorno Muñoz, Doris L. Gutiérrez-Lamus, Rafael O. De Sá
Biology Faculty Publications
Leptodactylus guianensis is reported for the first time for Colombia along with a distributional map of the species. The species is the fifth species of the L. latransspecies group documented in the country. Males possess a single, conical and slightly chisel-shaped thumb spine; only three species in the group have a single thumb spine. In collections, specimens of L. guianensis are misidentified as L. macrosternum, L. latrans or L. bolivianus. We provide morphological, colouration and habitat descriptions for where the species occurs in Colombia.
Carbon Cycling In Northern Fen Peatlands – Implications For Climate-Driven Changes Of Ecosystem Carbon Fluxes,
2019
The University of Western Ontario
Carbon Cycling In Northern Fen Peatlands – Implications For Climate-Driven Changes Of Ecosystem Carbon Fluxes, Jing Tian
Electronic Thesis and Dissertation Repository
Northern peatlands are important long-term carbon (C) sinks with one-third of northern hemisphere soil organic carbon being stored there. Cool and wet environments at higher latitudes promote C accumulation in northern peatlands by limiting the C loss from decomposition. Northern latitudes are anticipated to experience disproportionately faster climate warming in the future, putting the vast C stores in northern peatlands at risk. There is a concern that northern peatlands are becoming net C sources and further accelerate climate warming. Using both laboratory and field experiments, this doctoral research aimed to explore the potential response of C cycling in northern peatlands …
Lingering Impacts Of Hurricane Hugo On Rhizophora Mangle (Red Mangrove) Population Genetics On St. John, Usvi,
2019
Montclair State University
Lingering Impacts Of Hurricane Hugo On Rhizophora Mangle (Red Mangrove) Population Genetics On St. John, Usvi, Paul Ax Bologna, James J. Campanella, Dena J. Restaino, Zachary A. Fetske, Matthew Lourenco, John V. Smalley
Marine Biology and Coastal Sciences Faculty Scholarship and Creative Works
Stochastic events can have catastrophic effects on island populations through a series of genetic stressors from reduced population size. We investigated five populations of red mangrove (Rhizophora mangle) from St. John, USVI, an UNESCO Biosphere Reserve, which were impacted by Hurricane Hugo in 1989. Our goal was to determine diversity and to ascertain potential population bottlenecks two decades after the event. With the lowest observed heterozygosity, highest inbreeding coefficient, and evidence of a major bottleneck, our results demonstrated that the Great Lameshur mangroves, devastated by Hurricane Hugo, were the least diverse stand of trees. The other four populations from St. …
Phylogeny Of The Australian Solanum Dioicum Group Using Seven Nuclear Genes: Testing Symon’S Fruit And Seed Dispersal Hypotheses.,
2019
Bucknell University
Phylogeny Of The Australian Solanum Dioicum Group Using Seven Nuclear Genes: Testing Symon’S Fruit And Seed Dispersal Hypotheses., Christopher T. Martine, Ingrid E. Jordon-Thaden, Angela J. Mcdonnell, Jason T. Cantley, Daniel S. Hayes, Morgan D. Roche, Emma S. Frawley, Ian S. Gilman, David C. Tank
Faculty Journal Articles
The dioecious and andromonoecious Solanum taxa (the “S. dioicum group”) of the Australian Monsoon Tropics have been the subject of phylogenetic and taxonomic study for decades, yet much of their basic biology is still unknown. This is especially true for plant-animal interactions, including the influence of fruit form and calyx morphology on seed dispersal. We combine field/greenhouse observations and specimen-based study with phylogenetic analysis of seven nuclear regions obtained via a microfluidic PCR-based enrichment strategy and high-throughput sequencing, and present the first species-tree hypothesis for the S. dioicum group. Our results suggest that epizoochorous trample burr seed …
Quantifying Anthropogenic Indicators And Changes In Dissolved Organic Matter In Coastal Urban Aquatic Ecosystems Exposed To High Tidal Flooding,
2019
Florida International University
Quantifying Anthropogenic Indicators And Changes In Dissolved Organic Matter In Coastal Urban Aquatic Ecosystems Exposed To High Tidal Flooding, Gonzalo E. Eyzaguirre
Department of Biological Sciences
Sea-level rise is causing an increase in tidal flooding in coastal urban areas. Extreme high tides, also known as king tides, are peak tide moments in which tidal amplitude is increased and shallow groundwater flows from the underlying water table are introduced. During tidal flooding in urban areas, accumulated anthropogenic indicators of different water sources are released from groundwater to surface waters, but how these tidal events affect the contributions of different water sources to urban flood waters is uncertain. We quantified tracers of anthropogenic origin including fluoride, fecal coliform bacteria, as well as dissolved organic carbon (DOC) concentrations and …
Board Invited Review: Prospects For Improving Management Of Animal Disease Introductions Using Disease-Dynamic Models,
2019
United States Department of Agriculture-Veterinary Services
Board Invited Review: Prospects For Improving Management Of Animal Disease Introductions Using Disease-Dynamic Models, Ryan S. Miller, Kim M. Pepin
USDA Wildlife Services: Staff Publications
Management and policy decisions are continually made to mitigate disease introductions in animal populations despite often limited surveillance data or knowledge of disease transmission processes. Science-based management is broadly recognized as leading to more effective decisions yet application of models to actively guide disease surveillance and mitigate risks remains limited. Disease-dynamic models are an efficient method of providing information for management decisions because of their ability to integrate and evaluate multiple, complex processes simultaneously while accounting for uncertainty common in animal diseases. Here we review disease introduction pathways and transmission processes crucial for informing disease management and models at the …
Identification Of Bird-Associated Nonpoint Sources Of Microbial Contamination In Sediments,
2019
Georgia Southern University
Identification Of Bird-Associated Nonpoint Sources Of Microbial Contamination In Sediments, Savannah D. Mullins
Honors College Theses
Fecal indicator bacteria (FIB), such as Enterococci, are commonly used to monitor the microbial contamination of recreational beach waters based on standards set by the United States Environmental Protection Agency. Sediment and sand may also harbor FIB and reintroduce these bacteria to the water column. Enterococci may be originated from various non-point sources such as humans and wildlife. Recent literature has shown that avian feces also harbor high concentrations of Enterococci. The purpose of this study is identify the relationship between Enterococci and avian-associated markers in sediments. Sediment samples were collected monthly from four sites at Kings Ferry Beach in …
Modeling The Effects Of Crab Potting And Road Traffic On A Population Of Diamondback Terrapins,
2019
College of William and Mary
Modeling The Effects Of Crab Potting And Road Traffic On A Population Of Diamondback Terrapins, Sarah Gilligand, Randolph Chambers
Randolph Chambers
No abstract provided.
Chlorophyll A And Primary Production Dynamics In Kentucky Lake: 2009-2018,
2019
Murray State University
Chlorophyll A And Primary Production Dynamics In Kentucky Lake: 2009-2018, Morgan Franklin
Scholars Week
Chlorophyll α (chl α) can be used as a proxy for phytoplankton biomass, while primary productivity (PP), the rate at which carbon is fixed into phytoplankton cells, is an indicator of how quickly carbon is turned over within the phytoplankton community. The purpose of this research was to examine the spatial distribution of chl α seasonally in Kentucky Lake and to examine the relationship between chl α and PP in two embayments of contrasting land use. The two sites analyzed are Ledbetter and Panther embayments. Data analysis showed that the chl α and PP were highly correlated; r=0.45 in Ledbetter …
Microhabitat Comparison Of Percina Roanoka (Roanoke Darter) And Percina Nevisense (Chainback Darter) In The Roanoke River,
2019
Roanoke College
Microhabitat Comparison Of Percina Roanoka (Roanoke Darter) And Percina Nevisense (Chainback Darter) In The Roanoke River, Dakota R. Spruill, Steven L. Powers
Virginia Journal of Science
Snorkel observations of Percina roanoka and P. nevisense in the Roanoke River during summer months were followed by measuring current velocity, water depth, and substrate diameter at points of occupation. A total of 89 observations of P. roanoka and 81 observations of P. nevisense were compared using two-sample T-tests. Percina roanoka inhabited faster, shallower water than P. nevisense with the former found in a mean flow of 0.318 m/s and depth of 31.53 cm and the latter in a mean flow of 0.17 m/s and depth of 55.6 cm. Mean diameter of substrate at points of occupation did not differ …
Quantifying Atlantic Sea Scallop (Placopecten Magellanicus) Larval Abundance Throughout Cape Elizabeth, Maine,
2019
University of Southern Maine
Quantifying Atlantic Sea Scallop (Placopecten Magellanicus) Larval Abundance Throughout Cape Elizabeth, Maine, Hannah Haskell, Britney Evangelista, Alex Loftis
Thinking Matters Symposium Archive
As markets for the Atlantic Sea scallop are growing, the need for sustainable and reliable harvesting methods such as aquaculture is more imperative than ever. Due to the difficulty of maintaining sea scallop hatcheries, scallop farmers typically collect larvae from the ocean and raise them until a marketable size on lease sites. In order to efficiently collect scallop larvae, being able to predict when the larvae are most abundant in the water column is crucial. The goal of our research was to learn when scallop larvae are most abundant in the water column and to determine if there is a …
Functional Feeding Groups Of Aquatic Macroinvertebrates On Natural And Artificial Leaves In Forested Stream Habitats In The Sebago Lake Land Reserve,
2019
University of Southern Maine
Functional Feeding Groups Of Aquatic Macroinvertebrates On Natural And Artificial Leaves In Forested Stream Habitats In The Sebago Lake Land Reserve, Sam H. Matey, Kala Freytag Wistar
Thinking Matters Symposium Archive
We investigated preferential insect colonization of natural versus artificial leaves in forested streams to determine the impact of invertebrate-substrate associations on macroinvertebrate community composition and ecosystem nutrient cycling. We created 10 onion bags filled with natural maple leaves and 10 filled with artificial maple leaves, and placed 5 of each in two forested streams, one larger and one smaller, in the Sebago Lake Land Reserve in Standish, Maine. We identified the aquatic macroinvertebrates found on these samples after approximately one month to order-level and used Maine DEP biomonitoring data and functional feeding group taxonomies to classify macroinvertebrates by functional feeding …
Exploring The Effects Of Dam Removals On Zooplankton In Penobscot Estuary,
2019
University of Southern Maine
Exploring The Effects Of Dam Removals On Zooplankton In Penobscot Estuary, Erin Bucci, Karen Wilson
Thinking Matters Symposium Archive
Estuaries provide many ecosystem services such as buffering the negative impacts of storms, offering recreation and commercial fishing opportunities, and they serve as a critical habitat corridor for migratory fish. In New England, estuarine habitats have been dramatically altered over the last 200 years due to dam construction; migratory fish such as Atlantic salmon and alewives have suffered. Recently, there have been several dam removal projects in Maine aimed to restore these populations – the largest of these efforts being the Penobscot River Restoration Project. In 2013, two dams were removed from the Penobscot River Estuary, opening more than 2,000 …
Guided Alligator Tours Or Raccoon Schooling (Gators),
2019
University of South Carolina - Columbia
Guided Alligator Tours Or Raccoon Schooling (Gators), Paul List
Senior Theses
In my two main internships during college, I worked closely with two very different animals: raccoons and alligators. Additionally, I gained experience in presenting educational programs during my internship at Fripp Island, where my most common program was our Gator Walk. For my thesis project, I built upon my experience in interpretive programming, drawing on my experience with alligators and raccoons to develop a unique educational program to present at Congaree National Park. This report will describe the process of developing this program as well as it’s implementation and outcomes. In addition, it includes a review of scholarly literature on …
Expanded Phenotypic Diagnoses For 24 Recently Named New Taxa Of Hesperiidae (Lepidoptera),
2019
University of Texas Southwestern Medical Center
Expanded Phenotypic Diagnoses For 24 Recently Named New Taxa Of Hesperiidae (Lepidoptera), Nick V. Grishin
The Taxonomic Report of the International Lepidoptera Survey
Expanded diagnoses by phenotypic characters for the 24 new taxa named in the article "Genomes of skipper butterflies reveal extensive convergence of wing patterns" by Li, W., Cong, Q., Shen, J., Zhang, J., Hallwachs, W., Janzen, D.H. and Grishin, N.V., 2019 and published in the Proceedings of the National Academy of Sciences of the United States of America on March 15, 2019 are provided and illustrated. More detailed diagnoses will help identifying these phylogenetic groups by their wing patterns and shapes and other morphological characters including the structures of antennae and genitalia using this single publication, instead of obtaining the …
Fish And Wildlife Conservation For Educators Nrs 580,
2019
University of Rhode Island
Fish And Wildlife Conservation For Educators Nrs 580, Michael Cerbo
Library Impact Statements
No abstract provided.
