Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Age structure (1)
- California (1)
- Carrion (1)
- Climate change (1)
- Data services (1)
-
- Encounter competition (1)
- Foraging arenas (1)
- Global change (1)
- Hydrolic modeling (1)
- Immunity (1)
- Interference competition (1)
- Interspecific interactions (1)
- Life history (1)
- Life-history trade-offs (1)
- Lizards (1)
- Mark-recapture (1)
- Matrix model (1)
- Mesocarnivore (1)
- Non-stationary (1)
- Noninvasive (1)
- Nutrition (1)
- On-site tests (1)
- Perturbation analysis (1)
- Population monitoring (1)
- Puma concolor (1)
- Rapid watershed delineation (1)
- Reproduction (1)
- Simple soil test (1)
- Soil health (1)
- Soil slake tests (1)
- Publication
- Publication Type
Articles 1 - 12 of 12
Full-Text Articles in Entire DC Network
Simple Soil Quality Tests And Organic Management Practices For Orchards In The Intermountain West, Esther Oline Thomsen
Simple Soil Quality Tests And Organic Management Practices For Orchards In The Intermountain West, Esther Oline Thomsen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Soil health is often overlooked as a long-term management strategy as growers face an increasing number of short-term management challenges in the Intermountain West. The costs of inputs are rising and water resources are becoming more limited. Soil with poor health typically requires more amendments and fertlizers to meet crop needs. Soil health tests can help reveal management practices that reduce soil health, as well as those that improve soil health. Practices known to improve soil health are reduced to no tillage, cover crop use- especially legumes, and addition of mulch and other organic materials. Soil health testing is not …
Temporal Foraging Patterns Of Nonnative Frogs (Eleutherodactylus Coqui) In Hawaii, Arthur C. Wallis, Robyn L. Smith, Karen H. Beard
Temporal Foraging Patterns Of Nonnative Frogs (Eleutherodactylus Coqui) In Hawaii, Arthur C. Wallis, Robyn L. Smith, Karen H. Beard
Wildland Resources Faculty Publications
The Puerto Rican Coqui Frog (Eleutherodactylus coqui) is a nocturnal, invasive species that was introduced into Hawaii in the 1980s. Because they reach extremely high densities (up to 90,000 frogs/ha), they have the potential to affect invertebrate prey communities. Previously, researchers used frogs collected only at night to characterize their prey. Because Coquis use retreat sites near the forest floor during the day and understory perch sites at night, frogs collected at night might show different amounts and types of prey than would frogs collected in the morning. We analyzed stomach contents of 435 frogs collected in the morning (0300–0600 …
Different Prey Resources Suggest Little Competition Between Non-Native Frogs And Insectivorous Birds Despite Isotopic Niche Overlap, Robyn L. Smith, Karen H. Beard, Aaron B. Shiels
Different Prey Resources Suggest Little Competition Between Non-Native Frogs And Insectivorous Birds Despite Isotopic Niche Overlap, Robyn L. Smith, Karen H. Beard, Aaron B. Shiels
Wildland Resources Faculty Publications
Non-native amphibians often compete with native amphibians in their introduced range, but their competitive effects on other vertebrates are less well known. The Puerto Rican coqui frog (Eleutherodactylus coqui) has colonized the island of Hawaii, and has been hypothesized to compete with insectivorous birds and bats. To address if the coqui could compete with these vertebrates, we used stable isotope analyses to compare the trophic position and isotopic niche overlap between the coqui, three insectivorous bird species, and the Hawaiian hoary bat. Coquis shared similar trophic position to Hawaii amakihi, Japanese white-eye, and red-billed leiothrix. Coquis were about 3 ‰ …
A Life-History Perspective On The Demographic Drivers Of Structured Population Dynamics In Changing Environments, David N. Koons, David T. Iles, Michael Schaub, Hal Caswell
A Life-History Perspective On The Demographic Drivers Of Structured Population Dynamics In Changing Environments, David N. Koons, David T. Iles, Michael Schaub, Hal Caswell
Wildland Resources Faculty Publications
Current understanding of life-history evolution and how demographic parameters contribute to population dynamics across species is largely based on assumptions of either constant environments or stationary environmental variation. Meanwhile, species are faced with non-stationary environmental conditions (changing mean, variance, or both) created by climate and landscape change. To close the gap between contemporary reality and demographic theory, we develop a set of transient life table response experiments (LTREs) for decomposing realised population growth rates into contributions from specific vital rates and components of population structure. Using transient LTREs in a theoretical framework, we reveal that established concepts in population biology …
Study On The Proceeding Of Hydraulic Problem Of Simulating Natural Fish Passage, Zhijuan Wang, Qingyuan Yang, Minghai Huang, Yong He
Study On The Proceeding Of Hydraulic Problem Of Simulating Natural Fish Passage, Zhijuan Wang, Qingyuan Yang, Minghai Huang, Yong He
International Symposium on Hydraulic Structures
Fish passage in water conservancy projects is an important means of improving river connectivity, and reducing the impact on the ecological environment. Simulating natural fish passage, which aims at the purpose of the river ecological corridor by the means of ecological optimization on the structure and section type based on the traditional fish passage, is promoted and applied in recent years gradually. At the same time, the hydraulic research related to the simulating natural fish passage has made great progress. In this paper, we firstly collected and summarized the research experience of the domestic and foreign typical fish passage, analyzed …
The Plight Of Aspen: Emerging As A Beneficiary Of Wolf Restoration On Yellowstone’S Northern Range, John Klaptosky
The Plight Of Aspen: Emerging As A Beneficiary Of Wolf Restoration On Yellowstone’S Northern Range, John Klaptosky
Aspen Bibliography
No abstract provided.
Comparing Conventional And Noninvasive Monitoring Techniques For Assessing Cougar Population Size In The Southern Greater Yellowstone Ecosystem, Peter D. Alexander
Comparing Conventional And Noninvasive Monitoring Techniques For Assessing Cougar Population Size In The Southern Greater Yellowstone Ecosystem, Peter D. Alexander
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Determining the abundance or density of wildlife populations is needed for informed decision-making by wildlife biologists. Cougars (Puma concolor), however, are a highly secretive species occurring at very low densities across the landscape, and thus their populations are difficult for biologists to accurately assess. The conventional, and most trusted, method entails physically trapping and radio-collaring as many cougars as possible in a population, and then performing a simple count to determine a minimum population size. While accurate, this method is prohibitively expensive, logistically challenging, and behaviorally disruptive to the study animal. Many noninvasive surveying techniques, such as camera …
Stable Isotopes And The Ecology And Physiology Of Reptiles, Andrew M. Durso
Stable Isotopes And The Ecology And Physiology Of Reptiles, Andrew M. Durso
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
When animals don’t have enough food, they have to “choose” between “spending” their limited energy on themselves or on their offspring. Biologists think that reptiles can make this choice quickly in response to different environments. But, it can be hard to study these choices because it is hard to convert between, for example, the number of eggs laid and the speed of healing a wound. By using stable isotope chemistry, we can collect more detailed and comparable information about how lizards and other animals spend their limited resources than with any other method. For example, lizards in the wild have …
Assessing Plant Community Structure In The Upper Las Vegas Wash Conservation Transfer Area, Nevada: The Influence Of Biotic And Abiotic Variables, Amy A. Croft
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Ecological communities are complex, the structure of which is composed of interactions between multiple community characteristics and the abiotic and biotic factors shaping them. Because of this complexity, ecological studies are generally limited in scope and size, often dissecting communities into their component parts to examine them piece by piece. While this might be the most practical method to study communities, this approach often neglects other characteristics that, with their inclusion, would provide a more complete picture of community ecology. The studies described in this dissertation were conducted in an effort to synthesize the complexity that is inherent in ecological …
Physically Based Modeling Of The Impacts Of Climate Change On Streamflow Regime, Nazmus Shams Sazib
Physically Based Modeling Of The Impacts Of Climate Change On Streamflow Regime, Nazmus Shams Sazib
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Understanding the implications of climate change on streamflow regime is complex as changes in climate vary over space and time. However, a better understanding of the impact of climate change is required for identifying how stream ecosystems vulnerable to these changes, and ultimately to guide the development of robust strategies for reducing risk in the face of changing climatic conditions. Here I used physically based hydrologic modeling to improve understanding of how climate change may impact streamflow regimes and advance some of the cyberinfrastructure and GIS methodologies that support physically based hydrologic modeling by: (1) using a physically based model …
The Importance Of Motivation, Weapons, And Foul Odors In Driving Encounter Competition In Carnivores, Maximilian L. Allen, Christopher C. Wilmers, L. Mark Elbroch, Julie M. Golla, Heiko U. Wittmer
The Importance Of Motivation, Weapons, And Foul Odors In Driving Encounter Competition In Carnivores, Maximilian L. Allen, Christopher C. Wilmers, L. Mark Elbroch, Julie M. Golla, Heiko U. Wittmer
Environment and Society Faculty Publications
Encounter competition is interference competition in which animals directly contend for resources. Ecological theory predicts the trait that determines the resource holding potential (RHP), and hence the winner of encounter competition, is most often body size or mass. The difficulties of observing encounter competition in complex organisms in natural environments, however, has limited opportunities to test this theory across diverse species. We studied the outcome of encounter competition contests among mesocarnivores at deer carcasses in California to determine the most important variables for winning these contests. We found some support for current theory in that body mass is important in …
Special Topic: Wildlife And Wing Energy: Are They Compatible? Introduction, Michael Hutchins, Bruce D. Leopold
Special Topic: Wildlife And Wing Energy: Are They Compatible? Introduction, Michael Hutchins, Bruce D. Leopold
Human–Wildlife Interactions
No abstract provided.