Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 9 of 9
Full-Text Articles in Integrative Biology
Field-Based Selenium Partitioning Coefficients, Trophic Transfer Factors, And Otolith Time-Series Analyses For A Walleye Community From An Ecotonal Plains Reservoir, Colorado. Iii., Scott J. Herrmann, Del Wayne R. Nimmo, Lynn M. Herrmann-Hoesing, Igor V. Melnykov, Norman M. Halden
Field-Based Selenium Partitioning Coefficients, Trophic Transfer Factors, And Otolith Time-Series Analyses For A Walleye Community From An Ecotonal Plains Reservoir, Colorado. Iii., Scott J. Herrmann, Del Wayne R. Nimmo, Lynn M. Herrmann-Hoesing, Igor V. Melnykov, Norman M. Halden
Western North American Naturalist
Little is known about partitioning coefficients, tissue bioaccumulation, trophic transfer, and otolith timeseries analyses of selenium (Se) in a fishery dominated by walleye (Sander vitreus) that consume multiple prey species and occur in a Se-rich reservoir. Concentrations of dissolved total Se in Pueblo Reservoir water consistently exceeded the current EPA criterion benchmark for lentic aquatic ecosystems. The major objectives of this study were to analyze Se in diet-borne consumables of a walleye fishery and perform time-series trend tests of 21 walleye sagittae. In contrast to previous reports, we proposed investigating Se partitioning from water to subsequent trophic levels …
Potentially Adaptive Significance Of Genome Size Diversity Across Ecological Gradients And Seed Size In Ivesia (Rosaceae), Israel T. Borokini, Shaun R. Broderick, Zhi Gao, Joshua M. Hallas, James A. Birchler, Mary M. Peacock
Potentially Adaptive Significance Of Genome Size Diversity Across Ecological Gradients And Seed Size In Ivesia (Rosaceae), Israel T. Borokini, Shaun R. Broderick, Zhi Gao, Joshua M. Hallas, James A. Birchler, Mary M. Peacock
Western North American Naturalist
Variation in genome size across taxa has been explained using neutral and nonadaptive theories; however, genome size variation among taxonomic groups can also be shaped by natural selection if it correlates with functional traits. This study investigated the potential adaptive significance of genome size in Ivesia, a radiating genus distributed in the western North American desert ecosystems. We estimated the genome size of 34 taxa (including 31 Ivesia taxa, 2 Potentilla taxa, and 1 Horkelia taxon) using flow cytometric methods. For each taxon, leaf samples were collected from 6 individuals in 1 location each; intraspecific genome size variation was …
Effects Of Fire On Kangaroo Rats In The San Joaquin Desert Of California, David J. Germano, Lawrence R. Saslaw, Brian L. Cypher, Linda Spiegel
Effects Of Fire On Kangaroo Rats In The San Joaquin Desert Of California, David J. Germano, Lawrence R. Saslaw, Brian L. Cypher, Linda Spiegel
Western North American Naturalist
Fire can alter ecological communities, particularly those that are not fire-adapted, such as desert communities. We examined the effects of fire on rodent communities in the San Joaquin Desert of central California. Of particular interest were the effects on kangaroo rats (Dipodomys spp.) including 2 rare species, the giant kangaroo rat (D. ingens) and the short-nosed kangaroo rat (D. nitratoides brevinasus). Lightning caused multiple fires in arid scrub habitat in western Kern County in 1993. We trapped rodents at 7 sites along paired transects, with one transect in a burned area and one in a …
Aquatic Insect Communities Remain Impaired Following Large-Scale River Restoration, Jared Meek, Jackson Birrell, Teagan Mulford, Dennis K. Shiozawa, C. Riley Nelson
Aquatic Insect Communities Remain Impaired Following Large-Scale River Restoration, Jared Meek, Jackson Birrell, Teagan Mulford, Dennis K. Shiozawa, C. Riley Nelson
Western North American Naturalist
River manipulation and degradation can cause detrimental impacts on aquatic insect communities. River restoration projects seek to mitigate these human disturbances. Assessing the efficacy of river restoration remains an important goal for river managers and conservation biologists so that improved restoration methods can be used in the future. From 1999 to 2008, the Utah Reclamation Mitigation and Conservation Commission restored a 15-km channelized portion of the Provo River (Wasatch County, Utah, USA). Before (1999) and during (2002) the restoration project, macroinvertebrate samples were collected using modified kick nets from 3 sites within the restored area and 1 site outside the …
Insects Are Attracted To White Wind Turbine Bases: Evidence From Turbine Mimics, Madison S. Crawford, Delina E. Dority, Michael E. Dillon, Lusha M. Tronstad
Insects Are Attracted To White Wind Turbine Bases: Evidence From Turbine Mimics, Madison S. Crawford, Delina E. Dority, Michael E. Dillon, Lusha M. Tronstad
Western North American Naturalist
Wind power is one of the fastest growing forms of renewable energy, but the interactions between wind turbines and insects are largely unknown beyond the observation that the accumulation of dead insects on turbine blades drastically reduces the power produced. Insects may be attracted to wind energy facilities because of topography, the heat that turbines produce, the lighting, or the visual cue of the turbine itself. Turbines can present a striking visual contrast relative to the surrounding landscape, particularly when they are painted bright white and reflect ultraviolet wavelengths. To test the hypothesis that wind turbine color attracts insects, we …
Western Pearlshell (Margaritifera Falcata) Extirpation In The Smith River, Montana, With A Possible Link To Warming Water Temperatures, David M. Stagliano
Western Pearlshell (Margaritifera Falcata) Extirpation In The Smith River, Montana, With A Possible Link To Warming Water Temperatures, David M. Stagliano
Western North American Naturalist
Western pearlshell (Margaritifera falcata) populations are in decline across the species’ range in western North America. In 2008, Montana categorized the western pearlshell as an imperiled species of concern (S2) based on reduced detections at historically occupied sites and few viable populations. Between 2004 and 2014, we surveyed 24 Smith River reaches (61 total sites in the watershed) for the presence of western pearlshell populations. Despite historical and anecdotal descriptions of abundant western pearlshell in the Smith River, intensive structured surveys between 2004 and 2007 documented only 4 sections with low-density, nonviable western pearlshell populations (<10 individuals, large size classes [average total length = 70 mm], with no signs of recruitment). In 2014, we revisited these occupied sites to repeat surveys (expending significantly more search time) and observed no live individuals. This was surprising given that, although those populations would certainly die out without recruitment, older individuals can oftentimes persist for decades. Therefore, we consider the western pearlshell mussel extirpated from the Smith River watershed. We reviewed long-term USGS gage discharge and temperature data near the western pearlshell populations to evaluate the potential causal factors for, and timing of, the extirpation. From 3 July to 3 August 2007, water temperatures were at or above the thermal stress levels of the western pearlshell (>25 °C, …
Plains To Peaks: An Analysis Of The Relationship Between Colorado Butterfly Communities And Altitude, Anna O. James, Kathryn Hokamp, Chris García-Hellmuth, Richard P. Reading
Plains To Peaks: An Analysis Of The Relationship Between Colorado Butterfly Communities And Altitude, Anna O. James, Kathryn Hokamp, Chris García-Hellmuth, Richard P. Reading
Western North American Naturalist
We compared butterfly communities of the Plains, Foothills, and Montane Zones of the Colorado Front Range and examined 3 groups of butterflies—blues (Polyommatinae species), fritillaries (Speyeria and Boloria spp.), and painted ladies (species Vanessa cardui)—for altitude shifts between 2014 and 2020. We conducted these analyses using data collected by volunteer butterfly monitors from the Colorado Butterfly Monitoring Network, a group organized and run by Butterfly Pavilion in Westminster, Colorado. Monitors walked designated routes and counted all butterflies they saw, identifying each to the lowest possible taxonomic group they could. We sorted routes into the 3 altitude zones, organized …
First Shasta Ground Sloth (Nothrotheriops; Xenarthra) From The Eastern Great Basin, Nevada, Jim I. Mead, Sandra L. Swift, H. Gregory Mcdonald, Steven D. Emslie
First Shasta Ground Sloth (Nothrotheriops; Xenarthra) From The Eastern Great Basin, Nevada, Jim I. Mead, Sandra L. Swift, H. Gregory Mcdonald, Steven D. Emslie
Western North American Naturalist
We present the first record of the Shasta ground sloth (Nothrotheriops shastensis) for the eastern Great Basin. The single right upper second molariform was recovered from the back dirt pile of archaeological test pits excavated during the 1960s and 1970s in Smith Creek Cave, northern Snake Range, White Pine County, Nevada. The precise age of the specimen is indeterminate, although all sediment layers in the area produced radiocarbon dates older than 11,000 cal BP; thus, the specimen is considered of the Rancholabrean Land Mammal Age. All previous accounts of this sloth in the Great Basin are from its …
Acarosporaceae Of New Mexico: Eight New Species Of Acarospora And Sarcogyne, Kerry Knudsen, Jana Kocourková, Eva Hodková, Jiří Malíček, Yan Wang
Acarosporaceae Of New Mexico: Eight New Species Of Acarospora And Sarcogyne, Kerry Knudsen, Jana Kocourková, Eva Hodková, Jiří Malíček, Yan Wang
Western North American Naturalist
Eight new species are described from the Chihuahuan Desert in southern New Mexico: Acarospora agostiniana, A. divisa, A. fissurata, A. ryanii, Sarcogyne brouardiana, S. coeruleonigricans, S. malpaiensis, and S. nogalensis. Three species, Acarospora coloradiana, A. peltastica, and A. utahensis are not treated as synonyms of A. strigata, a South American endemic. Thirty-four species of Acarosporaceae are reported from the Chihuahuan Desert in southern New Mexico. Fifty-six species of Acarosporaceae are reported from New Mexico. It is estimated that 416 species of described Acarosporales occur worldwide, most in need of revisions. …