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The Tensile Root Strength Of Emergent Coastal Macrophytes, Lauris Olivia Hollis 2018 Louisiana State University and Agricultural and Mechanical College

The Tensile Root Strength Of Emergent Coastal Macrophytes, Lauris Olivia Hollis

LSU Doctoral Dissertations

Spartina patens is a dominant emergent macrophyte in fresh, intermediate, and brackish marshes along the Atlantic and Gulf coasts of United States where its biomechanical properties are a key component of wetland health and resilience. Its root biomass and tensile root strength are essential for anchorage, erosion protection, and are important determinants of soil strength. Nutrients and the herbicide atrazine are suspected of negatively impacting this wetland plant and others. The objectives of this study were to: 1) ascertain the tensile root strength of five emergent coastal macrophytes in coastal estuaries, and 2) test the effects of nutrient addition, atrazine ...


Redescription And Phylogenetic Analysis Of The Materials Assigned To The Taxon "Captorhinikos" Chozaensis, Jason Paul Jung 2018 California State University - San Bernardino

Redescription And Phylogenetic Analysis Of The Materials Assigned To The Taxon "Captorhinikos" Chozaensis, Jason Paul Jung

Electronic Theses, Projects, and Dissertations

“Captorhinikos” chozaensis is a multiple-tooth-rowed captorhinid reptile from the Lower Permian Clear Fork Group, undivided formation. Upon re-examination of the materials associated with the species from both the Chicago Field Museum of Natural History, and the Smithsonian United States National Museum, I reaffirm their affinity and collective identity as a valid taxon. “Captorhinikos” chozaensis does not, however, belong with either of the two members of its genus, C. valensis or “C.” parvus, instead occupying its own branch on the phylogenetic tree of the Captorhinidae. This conclusion is based in strong results from a combined phylogenetic parsimony analysis combined with an ...


When Extinction Is More Ethical Than Conservation: The Endangered Species Act And The Keystone Dilemma, Miranda F. Thomas 2018 Danville Community College

When Extinction Is More Ethical Than Conservation: The Endangered Species Act And The Keystone Dilemma, Miranda F. Thomas

Exigence

This paper examines how the Endangered Species Act's measures to protect endangered species have resulted in increased rates of extinction. The author summarizes the concept of endangered keystone species and explains the processes and operations of the environmental legislation enacted to protect the species. The paper discusses the harmful consequences that certain laws have had on both species and humans, such as misappropriating resources to species that are not as endangered as others, and abusing regulations in manners that punish people for conservation efforts. By examining opposing arguments that favor increased regulation, this paper explains through data from leading ...


Industrial Impact, Sravani Ponnaluri '20, Emily Gonda '20 2018 Illinois Mathematics and Science Academy

Industrial Impact, Sravani Ponnaluri '20, Emily Gonda '20

UN Sustainable Development Goals Infographics

Industries burn fossil fuels to create goods which releases carbon dioxide into the atmosphere. CO2 contributes to 20% of the world's greenhouse effect, and the level of it in the atmosphere has increased to over 400 ppm when before the French Revolution it fluctuated between 180-280 ppm (NASA, 2016). The coal industry is a big contributor as it contributes to 35% of the total U.S. energy related CO2 emissions (EIA, 2017). This all leads to global warming, which causes rising sea levels, longer plant growing seasons, and an increase in forest fires (NASA).


The Groundwater Crisis, Austin Shwatal '20, Ethan Tse '20 2018 Illinois Mathematics and Science Academy

The Groundwater Crisis, Austin Shwatal '20, Ethan Tse '20

UN Sustainable Development Goals Infographics

What is Groundwater? Groundwater is simply any water that is found in underground permeable rock layers known as aquifers


Agricultural Practices Destroying The Environment, Ayan Mallik '20, Ethan Talreja '20 2018 Illinois Mathematics and Science Academy

Agricultural Practices Destroying The Environment, Ayan Mallik '20, Ethan Talreja '20

UN Sustainable Development Goals Infographics

  • 50% of the world's habitable land has been converted for farming (Farming: Habitat Conversion, 2017)
  • Indonesia rain forests have been cleared for the construction of palm oil plantations
  • This threatens the habitats of endangered species such as the Asian elephant


Threats To Ocean Biodiversity, Allia Lin '20, Grace Wulffraat '20 2018 Illinois Mathematics and Science Academy

Threats To Ocean Biodiversity, Allia Lin '20, Grace Wulffraat '20

UN Sustainable Development Goals Infographics

Overfishing

Taking fish out of the ocean faster than their populations can be naturally replenished


Solution & Effects Of Agricultural Practices, Ryan Talusan '20, Cait Castillo '20 2018 Illinois Mathematics and Science Academy

Solution & Effects Of Agricultural Practices, Ryan Talusan '20, Cait Castillo '20

UN Sustainable Development Goals Infographics

A potential solution of vertical farming

  • PROFITABLE
  • SCALABLE
  • YEAR-ROUND


Global Climate Change: Changing Weather Patterns, Janna Jann '20, Sabrina Meng '20 2018 Illinois Mathematics and Science Academy

Global Climate Change: Changing Weather Patterns, Janna Jann '20, Sabrina Meng '20

UN Sustainable Development Goals Infographics

You can take action to combat global climate change! Here are some starting points:

  • Use heating only when necessary
  • Reduce energy consumption
  • Reduce, Reuse, Recycle!
  • Use resources wisely!


Coastal Erosion And Flooding, Arohi Singh '20, Neha Maddali '20 2018 Illinois Mathematics and Science Academy

Coastal Erosion And Flooding, Arohi Singh '20, Neha Maddali '20

UN Sustainable Development Goals Infographics

The effects of human activities on our coasts.


Coastal Waters, Alison Deng '20, Winny Liu '20 2018 Illinois Mathematics and Science Academy

Coastal Waters, Alison Deng '20, Winny Liu '20

UN Sustainable Development Goals Infographics

Coastal water, specifically coastal erosion, has been a growing problem due to human impact.


Waste Management, Rachel Moreno '20, Alana Depaz '20 2018 Illinois Mathematics and Science Academy

Waste Management, Rachel Moreno '20, Alana Depaz '20

UN Sustainable Development Goals Infographics

"Human society sustains itself by transforming nature into garbage."

~Mason Cooley


Urbanization In India: An Obituary, Meghana Karan '20, Shruti Shakthivel '20 2018 Illinois Mathematics and Science Academy

Urbanization In India: An Obituary, Meghana Karan '20, Shruti Shakthivel '20

UN Sustainable Development Goals Infographics

India is urbanizing very rapidly due to the movement of people from rural areas to urban cities for better opportunities. India does not have the resources or money to back this rapid urbanization of the population in general. This urbanization has created many environmental problems with air and water pollution.


Effects Of Agriculture, Riley Brutto '20, Maddy Chow '20 2018 Illinois Mathematics and Science Academy

Effects Of Agriculture, Riley Brutto '20, Maddy Chow '20

UN Sustainable Development Goals Infographics

Due to a lack of education among their population, many Brazilians turn to agriculture as a way to provide for themselves and their families. Additionally, low labor costs draw in large commercial companies that establish business in these developing worlds. However, to obtain farmland in the first place, deforestation has become a common practice, where thousands of miles of lush jungles are cleared away for agricultural practices. According to NASA imaging, 224,000 square miles of rainforest have been cleared in the Amazon. If left unchecked, the drastic consequences could harm not only the countries practicing deforestation, but the entire ...


New Classification Of The Dictyostelids, Sanea Sheikh, Mats Thulin, James C. Cavender, Ricardo Escalante, Shin-ichi Kawakami, Carlos Lado, John C. Landolt, Vidyanand Nanjundiah, David C. Queller, Joan E. Strassmann, Frederick W. Spiegel, Steven L. Stephenson, Eduardo M. Vadell, Sandra L. Baldauf 2018 Washington University in St Louis

New Classification Of The Dictyostelids, Sanea Sheikh, Mats Thulin, James C. Cavender, Ricardo Escalante, Shin-Ichi Kawakami, Carlos Lado, John C. Landolt, Vidyanand Nanjundiah, David C. Queller, Joan E. Strassmann, Frederick W. Spiegel, Steven L. Stephenson, Eduardo M. Vadell, Sandra L. Baldauf

Biology Faculty Publications & Presentations

Traditional morphology-based taxonomy of dictyostelids is rejected by molecular phylogeny. A new classification is presented based on monophyletic entities with consistent and strong molecular phylogenetic support and that are, as far as possible, morphologically recognizable. All newly named clades are diagnosed with small subunit ribosomal RNA (18S rRNA) sequence signatures plus morphological synapomorphies where possible. The two major molecular clades are given the rank of order, as Acytosteliales ord. nov. and Dictyosteliales. The two major clades within each of these orders are recognized and given the rank of family as, respectively, Acytosteliaceae and Cavenderiaceae fam. nov. in Acytosteliales, and Dictyosteliaceae ...


Mute Swans, David R. Marks 2018 USDA-APHIS Wildlife Services

Mute Swans, David R. Marks

Wildlife Damage Management Technical Series

Mute swans (Cygnus olor) are an invasive species originally brought to the United States in the late 19th and early 20th centuries for ornamental ponds and lakes, zoos and aviculture collections. Original populations were located in northeastern states along the Hudson Valley but have since expanded to several Midwestern states and portions of the western U.S. and Canada. Mute swan damage includes competing with native waterfowl, destroying native plants, spreading disease, and colliding with aircraft. They are also considered a nuisance in some areas due to their abundant fecal droppings and aggressiveness towards people.

Mute swans can impact ecosystems ...


The Effects Of Tree Plantations And Land Use On Natural Regeneration Of Woody Plants In The Tropics: Diversity, Species Composition, Successional Dynamics, And Functional Traits, John Benjamin Longworth 2018 Louisiana State University and Agricultural and Mechanical College

The Effects Of Tree Plantations And Land Use On Natural Regeneration Of Woody Plants In The Tropics: Diversity, Species Composition, Successional Dynamics, And Functional Traits, John Benjamin Longworth

LSU Doctoral Dissertations

As anthropogenic forests become more common in the tropics, there is a greater need to understand the factors that impact forest succession. I used censuses of woody plants in successional forests to study the effects of prior land use and tree plantations on species composition and richness. First, I tested the hypothesis that communities originating from different land uses were converging in species composition over time. I compared species composition using the Chao-Jaccard similarity index. I observed shifts in the dominant species during the first 30 years of succession, but not convergence of species composition in sites with different land-use ...


Predator Presence And Size Variation Alters Community Structure Through Multiple Trophic Cascades, Robin Baker, Howard Whiteman Ph.D. 2018 Murray State University

Predator Presence And Size Variation Alters Community Structure Through Multiple Trophic Cascades, Robin Baker, Howard Whiteman Ph.D.

Murray State Theses and Dissertations

Predation plays a crucial role in shaping community structure and can initiate trophic cascades that can alter abundances across adjacent trophic levels. Recent research has suggested that variation among individual predators may have stronger effects on ecological dynamics than previously appreciated. Intraspecific variation within predators could lead to differential levels of top-down control with implications for trophic cascade strength. In this experiment, we manipulated the body size variation of predatory mole salamanders (Ambystoma talpoideum) within experimental mesocosms and monitored a suite of abiotic and biotic response variables. We predicted that predator populations with increased body size variation would have limited ...


Jeweled Spider Flies (Eulonchus Tristis) Are Important Pollinators Of Iris Bracteata, A Rare Siskiyou Mountain Endemic, Jean-Paul E. Ponte 2018 Humboldt State University

Jeweled Spider Flies (Eulonchus Tristis) Are Important Pollinators Of Iris Bracteata, A Rare Siskiyou Mountain Endemic, Jean-Paul E. Ponte

Theses and projects

Little is known about the pollination biology of the Pacific Coast Irises (Iris: series Californicae, hereafter PCI), especially who visits and pollinates their flowers. In general, Iris flowers are considered bee-pollinated, however, flies in the genus Eulonchus (Acroceridae) are known to visit some PCI members. Therefore, I assessed the relative importance of Eulonchus and other insect visitors to the pollination of a rare PCI species native to the Siskiyou Mountains, I. bracteata.

Methods. I quantified pollinator importance for all flower visitors at sites in northern California and southern Oregon as the product of average visit rate and the probability of ...


Small Mammal Microhabitat Use And Species Composition At A Wildlife Crossing Structure Compared With Nearby Forest, Lindsay Millward, Kristina Ernest 2018 Central Washington University

Small Mammal Microhabitat Use And Species Composition At A Wildlife Crossing Structure Compared With Nearby Forest, Lindsay Millward, Kristina Ernest

All Master's Theses

Expanding transportation corridors have fragmented ecosystems throughout the world, restricting the movement of organisms or acting as complete connectivity barriers. Wildlife crossing structures (WCS) can increase the permeability of roads, allowing animals to move safely between habitats. Small mammals are especially vulnerable to the effects of reduced connectivity because of their limited mobility; however, few studies have evaluated their use of WCS. This study was conducted at a WCS under I-90 near Snoqualmie Pass, Washington. Our objective was to evaluate the small mammal species composition at the wildlife undercrossing in comparison to adjacent restoration sites and to the nearby forest ...


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