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Articles 31 - 60 of 534
Full-Text Articles in Entire DC Network
Book Reviews, Francois Vuilleumier
Breeding Ecology Of The Social (Myiozetetes Similis) And Rustymargined (M Cayanensis) Flycatchers At Barro Colorado Island, Republic Of Panama, Andrzej Dyrcz
Ornitología Neotropical
No abstract provided.
Foraging And Diet Composition Of The Black-Capped Foliage Gleaner (Philydor Atricapillus), Francisco Mallet-Rodrigues
Foraging And Diet Composition Of The Black-Capped Foliage Gleaner (Philydor Atricapillus), Francisco Mallet-Rodrigues
Ornitología Neotropical
No abstract provided.
The Avifauna Of The Podocarpus National Park - The "Andean Jewel In The Crown" Of Ecuador's Protected Areas, Carsten Rahbek, Hanne Bloch, Michael Koie Poulsen, Jan Fischer Rasmussen
The Avifauna Of The Podocarpus National Park - The "Andean Jewel In The Crown" Of Ecuador's Protected Areas, Carsten Rahbek, Hanne Bloch, Michael Koie Poulsen, Jan Fischer Rasmussen
Ornitología Neotropical
No abstract provided.
Trematode Parasitism As A Possible Factor In Over-Summering Of Greater Yellowlegs (Tringa Melanoleuca), Raymond Mcneil, Marcos Tulio Diaz, Belkys Casanova, Alain Villeneuve
Trematode Parasitism As A Possible Factor In Over-Summering Of Greater Yellowlegs (Tringa Melanoleuca), Raymond Mcneil, Marcos Tulio Diaz, Belkys Casanova, Alain Villeneuve
Ornitología Neotropical
No abstract provided.
Observations On The Feeding Upon Psittacanthus Calyculatus By Brown-Hooded Parrots (Pionopsitta Haematotis), Jack Clinton Eitniear, Steven Mcghee, Will Waddell
Observations On The Feeding Upon Psittacanthus Calyculatus By Brown-Hooded Parrots (Pionopsitta Haematotis), Jack Clinton Eitniear, Steven Mcghee, Will Waddell
Ornitología Neotropical
No abstract provided.
First Record Of The White-Flanked Antwren (Myrmotherula Axillaris) In Mexico, Manuel Marin
First Record Of The White-Flanked Antwren (Myrmotherula Axillaris) In Mexico, Manuel Marin
Ornitología Neotropical
No abstract provided.
Fortalecimiento De La Gobernanza Hídrica Comunitaria En El Destino Ecoturístico Maya Ka’An, Quintana Roo, México, Nori Velázquez Juárez, Liliana García Ramírez, Gonzalo Merediz Alonso, Eduardo Arturo Tapia Lemus
Fortalecimiento De La Gobernanza Hídrica Comunitaria En El Destino Ecoturístico Maya Ka’An, Quintana Roo, México, Nori Velázquez Juárez, Liliana García Ramírez, Gonzalo Merediz Alonso, Eduardo Arturo Tapia Lemus
Maya America: Journal of Essays, Commentary, and Analysis
En 2014, Maya Ka’an surgió como un nuevo destino turístico de Quintana Roo. Impulsado por la Asociación Civil Amigos de Sian Ka’an, plantea y desarrolla acciones bajo un enfoque de desarrollo sustentable, diferenciado al crecimiento de la región norte de Quintana Roo, México. Su actuación parte desde la base comunitaria en los municipios del centro del estado (Tulum, Felipe Carrillo Puerto y José María Morelos) y no está restringida al ámbito turístico, ya que integra diferentes elementos que confluyen en el desarrollo sustentable regional y la conservación del medio ambiente. Uno de estos elementos es la conservación del agua a …
Dryland Vegetation Mapping Using High Spatial-Temporal Resolution Satellite Imagery In New Mexico: A Comparison Of Phenological Time-Series Transformation Methods, Pratistha Sharma
Dryland Vegetation Mapping Using High Spatial-Temporal Resolution Satellite Imagery In New Mexico: A Comparison Of Phenological Time-Series Transformation Methods, Pratistha Sharma
Geography ETDs
New Mexico's drylands are undergoing notable vegetation changes due to rising aridity, higher temperatures, and shifts in precipitation with changing climate. Mapping drylands through remote sensing is challenging compared to mesic systems due to the irregular patterns of rainfall-driven phenology and weaker vegetation absorption signals. This study aims to enhance vegetation mapping in New Mexico, utilizing a high-resolution, frequently revisited PlanetScope dataset with multispectral capabilities, specifically chosen for its suitability for time-series analysis. The challenge with high spatial and temporal data lies in the overwhelming volume, leading to issues like the curse of dimensionality, overfitting, data redundancy, collinearity, and visualization …
Mitochondrial Metabolism In Blood More Reliably Predicts Whole-Animal Energy Needs Compared To Other Tissues, Stefania Casagrande, Maciej Dzialo, Lisa Trost, Kasja Malkoc, Edyta T. Sadowska, Michaela Hau, Barbara J. Pierce, Scott R. Mcwilliams, Ulf Bauchinger
Mitochondrial Metabolism In Blood More Reliably Predicts Whole-Animal Energy Needs Compared To Other Tissues, Stefania Casagrande, Maciej Dzialo, Lisa Trost, Kasja Malkoc, Edyta T. Sadowska, Michaela Hau, Barbara J. Pierce, Scott R. Mcwilliams, Ulf Bauchinger
Biology Faculty Publications
Understanding energy metabolism in free-ranging animals is crucial for ecological studies. In birds, red blood cells (RBCs) offer a minimally invasive method to estimate metabolic rate (MR). In this study with European starlings Sturnus vulgaris, we examined how RBC oxygen consumption relates to oxygen use in key tissues (brain, liver, heart, and pectoral muscle) and versus the whole-organism measured at basal levels. The pectoral muscle accounted for 34-42% of organismal MR, while the heart and liver, despite their high mass-specific metabolic rate, each contributed 2.5-3.0% to organismal MR. Despite its low contribution to organismal MR (0.03-0.04%), RBC MR best predicted …
The Urban Ecology Institute Teaches Local Youth About The Birds Of Boston, Annie Cardinaux, Andrew Breck
The Urban Ecology Institute Teaches Local Youth About The Birds Of Boston, Annie Cardinaux, Andrew Breck
Bird Observer
No abstract provided.
Ram Island: Recovery In Progress, Richard A. Harlow Jr.
Ram Island: Recovery In Progress, Richard A. Harlow Jr.
Bird Observer
No abstract provided.
Bobolink Protection And Mortality On Suburban Conservation Lands, Stephen F. Ells
Bobolink Protection And Mortality On Suburban Conservation Lands, Stephen F. Ells
Bird Observer
No abstract provided.
Investigating Telomere Lengths In Chestnut-Crowned Babblers, Gabriella Rose Beberg
Investigating Telomere Lengths In Chestnut-Crowned Babblers, Gabriella Rose Beberg
Honors Thesis
Telomeres are chromosomal elements that protect and maintain genes as DNA replicates in many organisms. As individuals age and DNA replicates, telomeres often shorten; thus, telomere length often corresponds with an individual’s lifespan, and early-life decreases in telomere length can be predictive of longevity. Here, I investigated the relationship between telomere length and developmental environment in a cooperatively breeding species, the chestnut-crowned babbler (Pomatostomus ruficeps; CCB). Cooperative species are unique, as some individuals give up their own breeding opportunities to help rear the offspring of others; further, cooperative breeding systems generate considerably more variation in adult carers, which …
Recolonization Of The Common Raven In Berkshire County, Massachusetts, Timothy J. Flanagan
Recolonization Of The Common Raven In Berkshire County, Massachusetts, Timothy J. Flanagan
Bird Observer
No abstract provided.
Bicknell's Thrush: A Northeastern Songbird In Trouble, Christopher C. Rimmer, Jonathan L. Atwood, Laura R. Nagy
Bicknell's Thrush: A Northeastern Songbird In Trouble, Christopher C. Rimmer, Jonathan L. Atwood, Laura R. Nagy
Bird Observer
No abstract provided.
A Key Link In Greater Boston's Wildlife Habitat: Metropolitan State Hospital, John Andrews, Lee Taylor
A Key Link In Greater Boston's Wildlife Habitat: Metropolitan State Hospital, John Andrews, Lee Taylor
Bird Observer
No abstract provided.
Thoreau: Speaking For Birds, Richard K. Walton
Some Notes On Spruce Grouse (Dendragapus Canadensis), Michael R. Greenwald
Some Notes On Spruce Grouse (Dendragapus Canadensis), Michael R. Greenwald
Bird Observer
No abstract provided.
Microbial Ecology Of Alpine Snows: Novel Approaches To Assess Spatial And Temporal Dynamics, Avery Ezra Tucker
Microbial Ecology Of Alpine Snows: Novel Approaches To Assess Spatial And Temporal Dynamics, Avery Ezra Tucker
Electronic Theses and Dissertations Archive
Snow algae blooms and associated microbial communities play large roles in snow ecosystem processes. Patterns and mechanisms underpinning snow algae bloom spatial distribution and associated microbial community assembly dynamics are poorly understood. To bridge these gaps in knowledge, this dissertation focused on two broad areas: (1) mapping associations of microbial communities and environmental measures between/within snow algae blooms across diverse substrate categories and identifying significant associations between them; (2) metagenome sequencing, offering the first partial genome of Sanguina nivaloides, along with identification of putative functional pathways. Although snow algae are an enigmatic domain in microbial community research, due to the …
Tiny Drifters Amidst Global Change: Examining Environmental Drivers, Trophic Impacts, And Management Strategies Of Estuarine Plankton Communities In The Anthropocene, Taylor Nicole Dodrill
Tiny Drifters Amidst Global Change: Examining Environmental Drivers, Trophic Impacts, And Management Strategies Of Estuarine Plankton Communities In The Anthropocene, Taylor Nicole Dodrill
Dissertations and Theses
Plankton productivity supports estuarine food webs, and has been tied to the success of fisheries, macroinvertebrates, and cultured shellfish yields. Climate change and alterations to nutrient loads are thought to be influencing plankton assemblages, with toxin-producing harmful algal blooms (HABs) on the rise and nutritional quality of plankton declining globally. These shifts in plankton communities may contribute to low biomass yields and toxin-based closures of important fisheries. The objectives of this dissertation are to identify environmental drivers, trophic impacts, and management strategies to understand and respond to changing estuarine plankton communities. To address these objectives, I used a combination of …
Can The Vegetation Structure And Composition In Urban Green Spaces Determine Diversity Of Green Lacewings (Neuroptera: Chrysopidae)?, Jose I. Martinez, Raiza J. Castillo, Adrián Ardila-Camacho, Charles V. Covell, José Isabel López-Arroyo, Francisco Javier Nava-Guízar
Can The Vegetation Structure And Composition In Urban Green Spaces Determine Diversity Of Green Lacewings (Neuroptera: Chrysopidae)?, Jose I. Martinez, Raiza J. Castillo, Adrián Ardila-Camacho, Charles V. Covell, José Isabel López-Arroyo, Francisco Javier Nava-Guízar
Insecta Mundi
Green spaces represent the only natural areas in several cities around the world, providing good shelters for the local fauna. Based on this premise, many ecological studies have been conducted focused on these areas. Most of these works are about insects, particularly butterflies and beetles. Our study is centered on a different group: green lacewings (Neuroptera: Chrysopidae). These insects exhibit a similar feeding behavior to some other groups, such as beetles. We estimated diversity, richness, distribution, abundance and similarity employing two methods: sweep netting and suction trapping. Also, oviposition hosts were identified in 20 different green spaces. Approximately 740 specimens …
The Influence Of Salinity And Vegetation Texture On The Ecological Roles Of Insects In Tidal Marshes In Louisiana, Benjamin G. Aker, Claudia Husseneder, Lane D. Foil
The Influence Of Salinity And Vegetation Texture On The Ecological Roles Of Insects In Tidal Marshes In Louisiana, Benjamin G. Aker, Claudia Husseneder, Lane D. Foil
Faculty Publications
Tidal marsh insect communities are influenced by both salinity and aspects of vegetation texture (vegetation diversity, plant density, and architectural structure). These factors affect the abundances and intra- and interguild interactions of these insects and should result in broad-scale variation in the distribution and ecological functioning of tidal marsh insect communities along these gradients. However, this assumption has not been tested within Gulf Coast marshes, and the insect communities and their ecological roles are not well known. This study identifies how family-level insect biodiversity varies by salinity and which factors are most important in affecting the distribution of insect functional …
Controls Of Benthic Microbial Communities In Headwater Streams Across A Land Use Gradient In Northeastern Usa, Joshua Michael Buonpane
Controls Of Benthic Microbial Communities In Headwater Streams Across A Land Use Gradient In Northeastern Usa, Joshua Michael Buonpane
Master's Theses and Capstones
Benthic microbes are important drivers of biogeochemical cycling in streams, influencing the storage, transformation, and emission of carbon and nutrients. While the impact of land use and land cover on water quality has been extensively studied, the connection between water quality and microbial community composition and function remains unresolved. In this study, we examined how the water quality changes accompanying watershed development impact the diversity, composition, and functional potential of benthic bacterial/archaeal, and fungal communities. This was explored in headwater streams across an urbanization gradient in the northeastern US. We did not find a link between urbanization and α-diversity of …
Exploring The Interrelationships Among Structural Complexity, Multi-Trophic Biodiversity, And Ecosystem Productivity In Forested Ecosystems., Ayanna St. Rose
Exploring The Interrelationships Among Structural Complexity, Multi-Trophic Biodiversity, And Ecosystem Productivity In Forested Ecosystems., Ayanna St. Rose
Graduate Theses and Dissertations
Forests play a pivotal role in sustaining global biodiversity and mitigating the global climate, as they serve as the primary refuge for terrestrial biodiversity and effectively capture and store atmospheric carbon dioxide. However, changing climate and land use are altering the geographic distribution, physical structure, and productivity of forested ecosystems that can have profound impacts on biodiversity conservation, forest productivity, and global climate. This dissertation contributes to our understanding of multifaceted interactions between the physical and biological structural complexity and ecosystem functions in forested landscapes across the United states by using openly available data from two national networks: the National …
Human Dimensions Of Woody Encroachment Management In Nebraska, Emily Rowen
Human Dimensions Of Woody Encroachment Management In Nebraska, Emily Rowen
School of Natural Resources: Dissertations, Theses, and Student Research
Woody plant encroachment (WPE) is a social-ecological problem that will challenge conservation professionals and agricultural producers to adapt their management strategies. This research first examined WPE from the perspective of individual conservation professionals through an online survey. Conservation professionals’ attitudes about adaptation to vegetation transitions, such as WPE, were of interest because these attitudes are one measure of how prepared this group is to respond to WPE. Hypothesized predictors of adaptation attitude were tested through linear regression modeling. These predictors included ecological change, observation of WPE, or risk perception. It was found that risk perception was the strongest predictor of …
In Situ Water Sensing Systems: Research On Advancements In Environmental Monitoring, Abigail Seibel
In Situ Water Sensing Systems: Research On Advancements In Environmental Monitoring, Abigail Seibel
Honors Program: Senior Projects (Public)
In this work, two sensing systems were researched in order to improve in situ environmental monitoring. The first is a pH and Total Alkalinity sensor used to determine these characteristics of sea water. I explored the facets of this sensor over a 7-week internship with Dr. Ellen Briggs in her lab in summer of 2023. The second is a more holistic sensing system that reads temperature, turbidity, and pressure used for studying environmental characteristics of Alaskan bever ponds. Both systems were developed in close collaboration with scientists who are collecting data to better understand the impacts of climate change. Better …
Seagrass Epibiont Biodiversity In The Northern Gulf Of Mexico, Kathryn Wyssmann
Seagrass Epibiont Biodiversity In The Northern Gulf Of Mexico, Kathryn Wyssmann
LSU New Orleans Theses and Dissertations
Epibionts on seagrass leaves contribute substantially to productivity and trophic interactions in seagrass ecosystems. Differences in epibiont assemblages and factors that contribute to epibiont diversity have been little studied on the seagrass Halodule wrightii in the northern Gulf of Mexico (nGoM). We used a metabarcoding approach to describe epibiont assemblages on H. wrightii leaves in four bays across the nGoM and to test whether epibiont assemblages differed spatially at local levels (within bays) or regional levels (from west to east). Furthermore, we tested if epibiont diversity was related to environmental conditions and/or seagrass productivity. Epibiont assemblages differed significantly between bays …
Evolution And Natural Selection Of Olfactory Receptor Genes In Hawaiian Drosophila, Ngoc H. Ly
Evolution And Natural Selection Of Olfactory Receptor Genes In Hawaiian Drosophila, Ngoc H. Ly
UNLV Theses, Dissertations, Professional Papers, and Capstones
The olfactory system is a powerful tool for sensing countless odorants. In Drosophila, the olfactory system is critical for detecting food, finding mates, laying eggs, avoiding predators, and adapting to new environments. Understanding the olfactory system in Drosophila will advance our knowledge of sensory biology in various insects and vertebrates, including humans. Drosophila has been a valuable model for biology since the early 1900s, and the Drosophila melanogaster olfactory system is well-studied. The Hawaiian Drosophila represent approximately 1/3 of the world’s Drosophila, however, there is limited research on Hawaiian Drosophila olfactory genes. We conducted a comparative analysis of …
Correlations Between Educational Struggle, Toxic Sites By School District And Demographic Variables, With Geographical Information System Projections, Junu Shrestha, Raihan K. Khan, Shane Mcclintock, John Degroote, Catherine L. Zeman
Correlations Between Educational Struggle, Toxic Sites By School District And Demographic Variables, With Geographical Information System Projections, Junu Shrestha, Raihan K. Khan, Shane Mcclintock, John Degroote, Catherine L. Zeman
Faculty Publications
This correlational study associated data on children enrolled in individualized educational plans in their K-12 schools (IEP) and an algorithm-calculated score of neurotoxins at contaminated sites located in each school district. The study also mapped and projected the correlations using Geographical Information System (GIS) technology. These data were populated in ArcMap 10.5 (a GIS software) for generating maps and data to conduct geospatial analysis. A total of 1 Superfund site and 39 CERCLA sites were identified as contaminated sites for this analysis. The majority of contaminants were heavy metals such as lead, arsenic, mercury, and cadmium. The mean toxic score …