Digital Commons Network^™

Lecturas Ecoculturales Del Caribe Hispánico Y Francés Y Del Brasil, Mariana Herring

Spanish and Portuguese ETDs

In this dissertation, we analyze a selection of works, both literary and filmic, in order to explore how they connect ecological realities with the social, economic and cultural realms. Through the analysis of novels, biographies and films by Caribbean and Brazilian authors, this analysis will focus, in particular, on how these works show the impact of the imposition of the plantation, the modernization discourse, the ongoing colonial experience, and the dismissal of traditional and local knowledge and practices, on ecological problems in the past and in the present. By ecological, we do refer to the interconnectedness between the human and …

Fluvial Geomorphic And Hydrologic Evolution And Climate Change Resilience In Young Volcanic Landscapes: Rhyolite Plateau And Lamar Valley, Yellowstone National Park, Benjamin Newell Burnett

Earth and Planetary Sciences ETDs

Quaternary volcanism associated with the last caldera cycle in Yellowstone National Park included emplacement of ash-flow tuffs, massive rhyolite flows ranging from 79 to 484 ka, and valley-filling basalts. This study examines (1) the evolution of spring hydrology with flow age on the Rhyolite Plateau, (2) initial development and evolution of stream networks on the rhyolite flows, and (3) the impact of the 630 ka caldera formation and volcanic flow emplacement on Lamar Valley incision rates.

Integrated stream networks formed within 79 kyr on the Rhyolite Plateau. Incision is focused on steep flow margins and knickpoints and is dependent on …

Neshnabé Futurisms: Indigenous Science And Eco-Politics In The Great Lakes, Blaire K. Topash-Caldwell

Anthropology ETDs

In the wake of global climate change anthropological work in Indigenous contexts has focused on crisis intervention. Well-intentioned scholarship has emphasized how climate change disproportionately affects Indigenous communities but in the process has also erased Native voice and agency—deleting them from the future all together. In this dissertation I argue that ecological revitalization projects by tribes, Women’s Water Walks from the ceremonial Midéwiwin Lodge, and Indigenous science fiction media together constitute “Neshnabé futurisms” that challenge or disrupt these dominant narratives. Neshnabé futurisms guide Native American ecologists, theorists, and activists in the Great Lakes region in mitigating and surviving ecological destruction …

Opportunities To Enhance Environmental Flows On The Rio Chama, Anjali Bean

Water Resources Professional Project Reports

The construction of El Vado dam on the Rio Chama in 1935 dramatically changed the natural flow of the river, reducing spring runoff and summer scouring floods in favor of providing a constant water supply to downstream users. The San Juan-Chama Project, a trans-basin water diversion built as part of the Colorado River Compact, also significantly increased water flow in the river, a unique situation in the state of New Mexico. This increase in management of the river for human benefit has permanently altered the natural hydrograph of the river and the ecology and geomorphology of the system that depends …

Managing Riparian Succession And Stabilizing Native Plant Assemblages In The Middle Rio Grande State Park, Roman M. Lopez

Architecture and Planning ETDs

Anthropogenic alterations of hydro geomorphological conditions of the Rio Grande River have changed the processes that have created the mosaic of riparian habitats valuable for ecosystem functioning, wildlife, and enjoyment by residents. These changes have created conditions that have increased the frequency of historically unprecedented disturbances such as fire and aggressive invasion of exotic species. Restoration activities and planning efforts have begun to reverse these effects, yet large areas of the Middle Rio Grande State Park, commonly called the Bosque, are still being affected by ecosystem changes. Studies of the Rio Grande and other Riparian corridors suggest that lack of …

Sleep As An Evolved Behavior: Ecological Opportunity Costs And Sleep Optimization, Gandhi Yetish

Anthropology ETDs

Sleep problems afflict millions world-over. Treating this has been difficult because there is no consensus definition for “normal” sleep. People can vary in their personal sleep need, but the determinants of variation in sleep duration are largely unknown, as is the criteria to determine how much variation is normal. Given that most diurnal mammals (including primates) appear to sleep from sunset to sunrise, the leading explanation for sleep pathology in the post-industrial world has been that electronics, especially light illuminating devices, substantially reduce sleep duration. This assertion has heretofore only been tested experimentally. This research aims to resolve this issue …

Monsoon Rainfall Manipulation Experiment (Mrme): Soil Nitrogen Data From The Sevilleta National Wildlife Refuge, New Mexico (2007 - Present), Scott Collins

Sevilleta LTER Program Data

The Monsoon Rainfall Manipulation Experiment (MRME) is designed to understand changes in ecosystem structure and function of a semiarid grassland caused by increased precipitation variability, by altering rainfall pulses, and thus soil moisture, that drive primary productivity, community composition, and ecosystem functioning. The overarching hypothesis being tested is that changes in event size and frequency will alter grassland productivity, ecosystem processes, and plant community dynamics. Treatments include (1) a monthly addition of 20 mm of rain in addition to ambient, and a weekly addition of 5 mm of rain in addition to ambient during the months of July, August and …

Ecotone Conditions Along Pinon-Juniper And Ponderosa Pine Elevational Ranges, Jemez Mountains, Nm, Christopher Sanderson

Architecture and Planning ETDs

While climate variability is endemic to Southwest North America (SWNA), mounting evidence indicates the region is undergoing significant warming and becoming increasingly arid. Species are at or near their physiological limits at ecotone boundaries and are therefore particularly sensitive to climate change. Drought and warming associated tree mortality has been particularly acute in the semiarid forests and woodlands of the Jemez Mountains, New Mexico, USA, where ponderosa pine forests (Pinus ponderosa var. scopulorum) and piñon--juniper woodlands (Pinus edulis and Juniperus monosperma) have been subject to cambium-feeding pine beetle (Dendroctonus spp., Ips spp) attacks and increased wildfire activity and severity. Grazing …

Root Associated Microbes: The Mediators Between Plants And Soil, Sarah Dean

Biology ETDs

Globally, increasing human populations have either caused or accelerated several types of environmental change. Symbiotic microbes have powerful effects on plant fitness, yet little study has been done on how microbial-plant relationships are affected by environmental changes. In two different ecosystems I explore how either nitrogen (N) pollution or drought can alter root associated microbe (RAM)-plant relationships using Next Generation Sequencing. In moist-meadow alpine tundra at Niwot Ridge, CO, I examine the relative contribution of host identity, N enrichment, and plant neighborhood on RAM diversity and community composition in two co-dominant plant species; Geum rossii and Deschampsia cespitosa. In New …

Too Wet For Frogs, Too Dry For Lizards: Role Of Changing Precipitation On Tropical Frogs And Arid Lizards, Mason J. Ryan

Biology ETDs

During the course of the Anthropocene, humans have modified the landscape and atmosphere resulting in increased global temperatures and intensification of the hydrologic cycle over the last 100 years. Amphibians and reptiles are especially vulnerable to climate change because of their ectothermic physiology and sensitivity to changes in water availability. The role of moisture or precipitation in ectotherm responses to climate change has not been well studied, but moisture plays a vital role in all aspects of the lives of lizards and frogs. It is exceedingly difficult to study the ecological effects of changing precipitation patterns due the stochastic nature …

Extreme Drought In Grassland Ecosystems (Edge) Seasonal Biomass And Seasonal And Annual Npp Data At The Sevilleta National Wildlife Refuge, New Mexico (2013- Present), Scott Collins

Sevilleta LTER Program Data

Net primary production is a fundamental ecological variable that quantifies rates of carbon consumption and fixation. Estimates of NPP are important in understanding energy flow at a community level as well as spatial and temporal responses to a range of ecological processes. While measures of both below- and above-ground biomass are important in estimating total NPP, this study focuses on above-ground net primary production (ANPP). Above-ground net primary production is the change in plant biomass, including loss to death and decomposition, over a given period of time. Volumetric measurements are made using vegetation data from permanent plots collected in SEV297, …

Core Site Grid Quadrat Data For The Net Primary Production Study At The Sevilleta National Wildlife Refuge, New Mexico (2013- Present), Esteban Muldavin

Sevilleta LTER Program Data

Begun in spring 2013, this project is part of a long-term study at the Sevilleta LTER measuring net primary production (NPP) across three distinct ecosystems: creosote-dominant shrubland (Site C), black grama-dominant grassland (Site G), and blue grama-dominant grassland (Site B). Net primary production is a fundamental ecological variable that quantifies rates of carbon consumption and fixation. Estimates of NPP are important in understanding energy flow at a community level as well as spatial and temporal responses to a range of ecological processes.Above-ground net primary production is the change in plant biomass, represented by stems, flowers, fruit and and foliage, over …

Restraurant Regions : An Ecological Community Based Model Of Restaurant Chain Distribution In The United States, Stephen Griego

Geography ETDs

The scope of this paper is an exercise in regional identification within the geography of the United States. This paper applied a hierarchical clustering methodology to analyze the distribution of restaurants in the landscape. The clustering model utilized in this study is commonly used in analysis of ecological communities. Each restaurant chain was treated as an individual biological species, and the clustering software analyzed it as such. The individual restaurant chain locations were treated as individual samples in the environment. Wards (1963) algorithm was used to group the individual restaurant chain locations into related clusters using simple correlation as the …

Life History And Morphometric Variation Of Gambusia Nobilis At Bitter Lake National Wildlife Refuge, Alyssa Hopkins

Biology ETDs

The Pecos Gambusia, Gambusia nobilis, is an endangered, live bearing fish inhabiting sinkholes in a restricted range of the Pecos River Watershed in New Mexico and Texas. The sink holes at Bitter Lake National Wildlife Refuge (BLNWR), Roswell, NM create isolated habitats with varying ecological conditions (habitat size, community composition, dissolved oxygen, salinity and pH). This ecological variation imposes unique selective pressures that may shape differences in life history characteristics and morphology between populations. The goals of this research were to characterize seasonal and population variation in 1) life history characteristics, 2) embryo development patterns, 3) morphology and 4) explore …

Ecosystem-Scale Rainfall Manipulation In A Piñon-Juniper Forest At The Sevilleta National Wildlife Refuge, New Mexico: Volumetric Water Content (Vwc) At 5 Cm Depth Data (2006- ), William Pockman, Nathan Mcdowell

Sevilleta LTER Program Data

Climate models predict that water limited regions around the world will become drier and warmer in the near future, including southwestern North America. We developed a large-scale experimental system that allows testing of the ecosystem impacts of precipitation changes. Four treatments were applied to 1600 m2 plots (40 m × 40 m), each with three replicates in a piñon pine (Pinus edulis) and juniper (Juniper monosperma) ecosystem. These species have extensive root systems, requiring large-scale manipulation to effectively alter soil water availability. Treatments consisted of: 1) irrigation plots that receive supplemental water additions, 2) drought plots that receive 55% of …

Growing Home: Sacred Space And Contemporary Ecotopia, Andrew Gingerich

Architecture and Planning ETDs

This thesis investigates the concept of ecocentrism and how an emerging ecocentric worldview might uniquely shape the built environment. This thesis is particularly interested in the role of sacred space in urban development, and how the notion of sacredness, unique to an ecocentric worldview, might affect various aspects of the built environment. These issues are explored in two basic parts. First, three basic worldviews are discussed\u2014the pre-modern worldview, the modern worldview, and the emerging ecocentric worldview--specifically on the topics of nature, space, and the city. Second, a qualitative research study of three ecotopian' communities is presented--Village Homes in Davis, CA; …

Feeding Ecology And Life History Strategies Of White-Faced Capuchin Monkeys, Elizabeth Eadie

Anthropology ETDs

Dietary niches have widespread effects on individuals life histories, behaviors, and morphologies. Capuchin monkeys inhabit a complex dietary niche that often entails hunting of relatively large vertebrate prey, tool-use, and extraction of embedded resources that other closely related and sympatric species do not exploit. In this dissertation I examine, a) how juvenile capuchins overcome the challenges of reliance on a difficult-to-acquire diet, b) at what age juveniles achieve maximum foraging return rates for difficult-to-acquire foods, and c) what nutritional benefits capuchins obtain from exploitation of these foods. In the process of addressing these questions I test two prominent hypotheses regarding …

Reproductive Phenology Of Fishes Of The Rio Grande, New Mexico : A Genes-To-Community Approach, Trevor James Krabbenhoft

Biology ETDs

Reproductive phenology is a key life history attribute of long lived organisms that can strongly affect reproductive success and, ultimately, drive community composition. Understanding the ecological causes and consequences and genetic mechanisms shaping reproductive timing is key to predicting the outcome of environmental change (e.g., climate change). The three chapters that comprised this dissertation were focused on elucidating the ecological and genetic underpinnings of reproductive timing in the fish community of an arid-land river, the Rio Grande, New Mexico. In Chapter 1, we assessed reproductive phenology in the Rio Grande fish community with four years of young-of-year sampling data and …

Pollination Ecology Of Agave Palmeri In New Mexico, And Landscape Use Of Leptonycteris Nivalis In Relation To Agaves, Angela E. England

Biology ETDs

Where animals spend time can provide important clues to their ecological needs, but this information is very difficult to obtain for small volant animals. The research described in Chapter 1 was an attempt to discern how L. nivalis utilize the landscape in relation to the distribution of Agave havardiana in Big Bend National Park, Texas. I found that although the landscape use of Leptonycteris nivalis is centered on habitat with high concentrations of blooming A.havardiana, it is not restricted to those areas, and furthermore adults and juveniles may differ in their behavior. Adult females may remain near food sources in …

Home/Land: Kiowa, New Mexico- A Grassland's Story, Heather R. Yaryan

Architecture and Planning ETDs

The purpose of this thesis was to illustrate how cultural and natural histories inform place-based community planning. Utilizing both cultural and natural histories, the planner may begin to see patterns of habitancy as they correlate to ecological fluctuations. I focused my research on Kiowa, New Mexico the community my family homesteaded in the grasslands of Northeastern New Mexico and took an auto-ethnographic approach to conducting my research. The story of Kiowa is both unique and universal. The intricacies of the land and people are, indeed, woven into a specific place and times. It is the intersection of Place and of …

Rainfall Manipulation Study Vegetation Data From The Chihuahuan Desert Grassland And Creosote Shrubland At The Sevilleta National Wildlife Refuge, New Mexico (2003-2011), William Pockman

Sevilleta LTER Program Data

The overall goal of the rainfall manipulation project is to understand the coupled ecological and hydrological responses of a grassland, shrubland and a mixed grass-shrub vegetation community to extended periods of increased or decreased rainfall. Rainfall manipulation plots have been established in each of these three vegetation communities in the Five Points area of Sevilleta National Wildlife Refuge. In each vegetation community, three control plots, three drought treatment plots, and three water addition plots have been installed, each approximately 10 x 15 m in size. In each plot, vertical profiles of soil moisture probes have been installed under each cover …

Treasures Of The Mama Huaca: Oral Tradition And Ecological Consciousness In Chinchaysuy, Enrique R. Lamadrid

Research Papers

The cycle of Mama Huaca legends has continuing relevance to the indigenous and mestizo peoples of Chinchaysuyu, the vast northwest quadrant of the former Inca Empire, whose principal cities were Tomebamba (Cuenca) and Quito. The fearsome hag of the heights and guardian of the mountain and its treasures is a persistent figure in the Andean imagination. She inhabits a highly animated landscape in which mountains and lakes are assigned not only gender, but differing degrees of wealth and wildness (Munoz-Bernard 1990). The moral legends in which Mama Huaca is a protagonist are also intimately connected to local topography and sacred …

San Luis Rey Indian Water Rights Settlement Act Of 1988, United States 100th Congress

Native American Water Rights Settlement Project

Federal Legislation: San Luis Rey Indian Water Rights Settlement Act of 1988, PL 100-675, 102 Stat. 4000 (Nov. 17, 1988). Parties: La Jolla Band of Luiseno Indians, Pala Band of Luiseno Mission Indians, Pauma Band of Luiseno Mission Indians, Rincon Band of Luiseno Mission Indians, San Pasqual Band of Diegueno Mission Indians, located in San Diego County, CA, US, CA, Escondido Mutual Water Company and Vista Irrigation District. The federal legislation was passed before the settlement agreement was developed. The purpose of the Act is to develop a reliable source of water for the Bands and to resolve their federal …