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Bacterial Diversity And Function Within An Epigenic Cave System And Implications For Other Limestone Cave Systems, Kathleen Merritt Brannen-Donnelly Dec 2015

Bacterial Diversity And Function Within An Epigenic Cave System And Implications For Other Limestone Cave Systems, Kathleen Merritt Brannen-Donnelly

Doctoral Dissertations

There are approximately 48,000 known cave systems in the United States of America, with caves formed in carbonate karst terrains being the most common. Epigenic systems develop from the downward flow of meteoric water through carbonate bedrock and the solutional enlargement of interconnected subsurface conduits. Despite carbonate karst aquifers being globally extensive and important drinking water sources, microbial diversity and function are poorly understood compared to other Earth environments. After several decades of research, studies have shown that microorganisms in caves affect water quality, rates of carbonate dissolution and precipitation, and ecosystem nutrition through organic matter cycling. However, limited prior …


A Multimodal Problem For Competitive Coevolution, Philip Hingston, Tirtha Ranjeet, Chiou Peng Lam, Martin Masek Jul 2015

A Multimodal Problem For Competitive Coevolution, Philip Hingston, Tirtha Ranjeet, Chiou Peng Lam, Martin Masek

Martin Masek

Coevolutionary algorithms are a special kind of evolutionary algorithm with advantages in solving certain specific kinds of problems. In particular, competitive coevolutionary algorithms can be used to study problems in which two sides compete against each other and must choose a suitable strategy. Often these problems are multimodal - there is more than one strong strategy for each side. In this paper, we introduce a scalable multimodal test problem for competitive coevolution, and use it to investigate the effectiveness of some common coevolutionary algorithm enhancement techniques.


Values Assigned To National Parks By Hispanics In The United States: Castillo De San Marcos And Fort Matanzas Nm And Great Smoky Mountains Np, Carla Mora-Trejos May 2015

Values Assigned To National Parks By Hispanics In The United States: Castillo De San Marcos And Fort Matanzas Nm And Great Smoky Mountains Np, Carla Mora-Trejos

All Dissertations

The integrity of Parks and Protected Areas (PPA) depends on management that acknowledges their position as part of the socio-cultural context and demonstrates awareness and attention to ethnic and racial dimensions of the communities adjacent to these areas. The Unites States National Park Service has dedicated resources and effort to determine ways to keep units in the national park service relevant in a changing world. The fastest growing and second largest demographic in the Unites States is the Latino or Hispanic population. Very little has been published about this rapidly growing population of Latin Americans residing in the United States …


Aquatic Macroinvertebrate Diversity Within An Urbanized Gradient, Brian E. Lovejoy Jr., Jacob Torres Apr 2015

Aquatic Macroinvertebrate Diversity Within An Urbanized Gradient, Brian E. Lovejoy Jr., Jacob Torres

Urban Watershed Project

No abstract provided.


Scarification And Gap Size Have Interacting Effects On Northern Temperate Seedling Establishment, John L. Willis, Michael B. Walters, Kurt W. Gottschallk Jan 2015

Scarification And Gap Size Have Interacting Effects On Northern Temperate Seedling Establishment, John L. Willis, Michael B. Walters, Kurt W. Gottschallk

USDA Forest Service / UNL Faculty Publications

After decades focused on promoting economically valuable species, management of northern temperate forests has increasingly become focused on promoting tree species diversity. Unfortunately, many formerly common species that could contribute to diversity including yellow birch (Betula alleghaniensis Britton.), paper birch (Betula papyrifera Marsh), eastern hemlock (Tsuga canadensis L.), and eastern white pine (Pinus strobus L.) are now uncommon in the seedling layer, raising concerns about our ability to use these species to increase diversity. In this study, two related seed addition experiments conducted in 45 variably-sized harvest gaps (unharvested to 6500 m^2) in adjacent mesic northern hardwood stands, Emmet County, …


Metacommunity Dynamics And The Biogeography Of Central Louisiana Crayfishes, William Robert Budnick Jan 2015

Metacommunity Dynamics And The Biogeography Of Central Louisiana Crayfishes, William Robert Budnick

LSU Master's Theses

The greatest diversity of crayfishes, especially of rare Orconectes species, is found in the central Louisiana watersheds (Red River, Mermentau, Calcasieu, and Vermillion-Teche), and most species are widely distributed among the drainages. The purpose of this research was to lay groundwork for species distribution and metacommunity modelling for crayfishes in this region. To address this goal, two field studies were performed in the summers of 2013 and 2014, as well as an indoor laboratory study. Analyses of broadly distributed species indicated no significant correlations between species abundances and habitat variables nor any significant environmental gradients for those species. Within-drainage variability …


Mathematics Education In A Multilingual And Multicultural Environment, Anjum Halai, Richard Barwell Jan 2015

Mathematics Education In A Multilingual And Multicultural Environment, Anjum Halai, Richard Barwell

Book Chapters / Conference Papers

No abstract provided.