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Ecology and Evolutionary Biology

2021

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Articles 1 - 30 of 1648

Full-Text Articles in Life Sciences

Reevaluation Of The Described Subspecies Of Euphydryas Phaeton (Drury, 1773) With A Replacement Name For Melitaea Phaeton Schausi (Clark, 1927), Harry Pavulaan Dec 2021

Reevaluation Of The Described Subspecies Of Euphydryas Phaeton (Drury, 1773) With A Replacement Name For Melitaea Phaeton Schausi (Clark, 1927), Harry Pavulaan

The Taxonomic Report of the International Lepidoptera Survey

The present paper reevaluates the subspecific standing of the nominotypical and three described subspecies of Euphydryas phaeton (Drury, 1773). The nominotypical subspecies phaeton occupies the mid-Atlantic region, with undefined zones of contact with described subspecies borealis (F. Chermock & R. Chermock, 1940) to the north, and subspecies schausi (Clark, 1927) to the south. Nominotypical phaeton is an intermediate phenotype between borealis and schausi, which are each noticeably different from each other but both reasonably similar to intermediate (nominotypical) phaeton. Both borealis and schausi were synonymized under nominotypical phaeton since about time of their descriptions, by authors and list …


New Synonymies And Notes In Criodion Audinet-Serville (Coleoptera: Cerambycidae: Cerambycinae), Antonio Santos-Silva, Sergio Devesa Dec 2021

New Synonymies And Notes In Criodion Audinet-Serville (Coleoptera: Cerambycidae: Cerambycinae), Antonio Santos-Silva, Sergio Devesa

Insecta Mundi

Criodion angustatum Buquet, 1852 and C. pilosum Lucas, 1857 (Coleoptera: Cerambycidae: Cerambycinae) are synonymized with C. tomentosum Audinet-Serville, 1834. The holotypes of C. angustatum and C. hirsutum, and syntypes of C. pilosum and of C. tuberculatum Gahan, 1892 are illustrated for the first time. One of the type localities of C. tuberculatum is corrected.

Currently, Criodion Audinet-Serville, 1834 includes 13 species distributed from Guatemala to southern South America (Monné 2021; Tavakilian and Chevillotte 2021). Despite the relatively small number of species, they encompass several problems with their identification. For example, the specimens often identified as C. murinum Nonfried, 1895 …


Composition, Population Structure And Regeneration Potential Of Tree Species In Oak-Dominated Mixed Forests Of Rajouri District In Jammu And Kashmir, India, Mohd Junaid Jazib, Javed Manzoor Dec 2021

Composition, Population Structure And Regeneration Potential Of Tree Species In Oak-Dominated Mixed Forests Of Rajouri District In Jammu And Kashmir, India, Mohd Junaid Jazib, Javed Manzoor

Journal of Bioresource Management

The study was carried out to explore the diversity and regeneration potential of trees species in mixed Oak forest of Rajouri district of Jammu and Kashmir (India). A total of 20 tree species were recorded from the area dominated by various species of oak particularly Quercus leuchotrichophora. Quercus leuchotrichophora shows maximum values of density, basal cover and IVI. In different localities, it has different groups of associates like Q. floribunda, Q. semecarpifolia, Q. glauca, Buxux wallichiana, Pinus roxburghii, Aesculus indica, Rhododendron arboreum, etc. Majority of the species show very poor regeneration and thus demands for immediate implementation of appropriate conservation …


Two New Species Of Deromecus Solier From Guatemala (Coleoptera: Elateridae: Pomachiliini), E. R. Fuller Dec 2021

Two New Species Of Deromecus Solier From Guatemala (Coleoptera: Elateridae: Pomachiliini), E. R. Fuller

Insecta Mundi

Deromecus georginas Fuller, new species, and Deromecus longitarsis Fuller, new species (Cole­optera: Elateridae: Pomachiliini) are described from cloud forest habitat on eastern coastal volcanoes in Quetzaltenango Department, Guatemala, and compared with Deromecus trivittatus Champion from Mexico.

Se describen la neuva especie Deromecus georginas Fuller y la neuva especie Deromecus longitarsis Fuller (Coleoptera: Elateridae: Pomachiliini), del hábitat del bosque nuboso, de los volcanes oriental de la costa, en el Departmento de Quetzaltenango, Guatemala, y se comparan con Deromecus trivittatus Cham­pion, de México.

The Elateridae are a conspicuous and diverse group of beetles in Central America (Champion 1894–1897). Adults of luminous …


Occurrence Of An Exotic Whitefly, Siphoninus Phillyreae (Haliday) (Hemiptera: Aleyrodidae) In South Korea And Its Potential Pathway Analysis, Seon Woo Lee, Hyun Jik Lee, Jun-Ran Kim, Soo-Jung Suh Dec 2021

Occurrence Of An Exotic Whitefly, Siphoninus Phillyreae (Haliday) (Hemiptera: Aleyrodidae) In South Korea And Its Potential Pathway Analysis, Seon Woo Lee, Hyun Jik Lee, Jun-Ran Kim, Soo-Jung Suh

Insecta Mundi

The ash whitefly, Siphoninus phillyreae (Haliday) (Hemiptera: Aleyrodidae), was first found in southern areas of South Korea during September 2019. During the survey of 2021, no additional specimens of the ash whitefly were found other than the previously reported regions. Attempts to trace a possible path­way for exotic ash whitefly suggested that this species probably followed pathways of illegal importation of infested plants from China or Japan and was unintentionally introduced into South Korea based on a survey-based study. This whitefly has not been intercepted at ports of entry to South Korea on imported plant material between 1999 and 2019 …


Micromentignatha Geberti, A New Tiger Beetle Species From Australia (Coleoptera: Cicindelidae), Jürgen Wiesner Dec 2021

Micromentignatha Geberti, A New Tiger Beetle Species From Australia (Coleoptera: Cicindelidae), Jürgen Wiesner

Insecta Mundi

Micromentignatha geberti (Coleoptera: Cicindelidae), new species, is described. It is distinguished from the other members of the genus by its larger body size and shape of elytral maculation.

Due to the kindness of Christian Kerkering, I was able to study specimens of a tiger beetle species he recently acquired. It proved to be new to science and is described herein. It is a member of Micromentignatha Sumlin, 1981, which raises the number of species in this genus to four (Wiesner 2020: 327). A key to distinguish these congeners as well as a catalog of the genus are given herein.


Ishtarella Thailandica Martens, New Genus, New Species (Hymenoptera: Braconidae: Aphidiinae) Of Aphid Parasitoid From Thailand, With A Country Checklist Of Aphidiinae, Abigail P. Martens, Matthew L. Buffington, Donald L.J. Quicke, Marisa Raweearamwong, Buntika A. Butcher, Paul J. Johnson Dec 2021

Ishtarella Thailandica Martens, New Genus, New Species (Hymenoptera: Braconidae: Aphidiinae) Of Aphid Parasitoid From Thailand, With A Country Checklist Of Aphidiinae, Abigail P. Martens, Matthew L. Buffington, Donald L.J. Quicke, Marisa Raweearamwong, Buntika A. Butcher, Paul J. Johnson

Insecta Mundi

Ishtarella Martens new genus (Hymenoptera: Braconidae: Aphidiinae) and I. thailandica Martens new species are described and illustrated from Doi Phu Kha National Park, Nan Province, Thailand. The genus is assigned to the tribe Aphidiini, subtribe Trioxina. Based on morphology, Ishtarella appears most closely related to Binodoxys Mackauer. An updated checklist of the aphidiine fauna of Thailand, based on published records, is presented.

Parasitoid wasps in the subfamily Aphidiinae (Hymenoptera: Braconidae) comprise about 60 genera and more than 650 species worldwide (Yu et al. 2016). The Aphidiinae of Thailand were all but unknown prior to a Thai­land Inventory Group for Entomological …


Ardella Magnaemirabilis (Coleoptera: Scarabaeidae: Melolonthinae: Ardellini), A New Scarabaeoid Species, Genus And Tribe From The Southwestern United States, M. J. Paulsen Dec 2021

Ardella Magnaemirabilis (Coleoptera: Scarabaeidae: Melolonthinae: Ardellini), A New Scarabaeoid Species, Genus And Tribe From The Southwestern United States, M. J. Paulsen

Insecta Mundi

An interesting new taxon of scarabaeoid beetle is described from western Texas, USA. The remark­ably small chafer, Ardella magnaemirabilis new genus, new species (Coleoptera: Scarabaeidae: Melolonthinae: Ardellini) is described and compared to other diminutive scarabaeoid genera from drier habitats of the southwestern USA. The tribe Ardellini, new tribe, is erected to accommodate the unusual genus.

After a few centuries with entomologists scouring the continent, the discovery of unknown Nearctic scarab gen­era is no longer commonplace. The western United States, in particular, is biogeographically diverse with pockets of endemism that makes such discoveries still possible, driving collectors to continue sampling …


New Larval Host Plants And Ecological Observations On North American Cerambycidae (Coleoptera), Josef Vlasak, Katerina Vlasakova Dec 2021

New Larval Host Plants And Ecological Observations On North American Cerambycidae (Coleoptera), Josef Vlasak, Katerina Vlasakova

Insecta Mundi

New larval hosts are presented for 152 North American Cerambycidae (Coleoptera). Larval host plants of Aneflus calvatus Horn in Leng, Aneflomorpha arizonica Linsley, Aneflomorpha fisheri Linsley, Ane­flomorpha opacicornis Linsley, Anelaphus magnipunctatus (Knull), Atylostagma glabra Schaeffer, Cacophrissus pauper Bates, Elytroleptus limpianus Skiles and Chemsak, Obrium rubidum LeConte, and Stenelytrana splen­dens (Knull) are reported for the first time. The types of wood utilized by larvae of Leptorhabdium pictum (Haldeman), Sphenostethus taslei (Buquet), Typocerus lugubris (Say), and Xestoleptura octonotata (Say) are discussed. Notes on larval morphology and larval habits of Aneflus spp. and Stenaspis solitaria (Say), includ­ing a correction of a published host …


Nesting Behavior, Ecology, And Functional Morphology Of The Trapdoor Spider-Hunting Spider Wasp Aporus (Plectraporus) Hirsutus (Banks) (Hymenoptera: Pompilidae), Frank E. Kurczewski, Alice J. Abela, Rick C. West Dec 2021

Nesting Behavior, Ecology, And Functional Morphology Of The Trapdoor Spider-Hunting Spider Wasp Aporus (Plectraporus) Hirsutus (Banks) (Hymenoptera: Pompilidae), Frank E. Kurczewski, Alice J. Abela, Rick C. West

Insecta Mundi

Macrophotographs in series taken by Alice Abela on sandy coastal dunes in Santa Barbara and San Luis Obispo Counties, CA in 2010–2021 supplement and enhance F. X. Williams (1928) study of the ecol­ogy and nesting behavior of the trapdoor spider-hunting spider wasp Aporus (Plectraporus) hirsutus (Banks) (Hymenoptera: Pompilidae: Aporini). Abela’s macrophotographs and observations provide new details of adult wasp feeding, functional morphology, hunting, digging and prey transport, and host spider trapdoor, entrance, burrow structure, host capture and escape activity. Newly reported host records from this study and online photographs expand A. hirsutus host selection in the large wafer-lid …


Scorpions Of The Horn Of Africa (Arachnida: Scorpiones). Part Xxvii. Lanzatus Huluul Sp. N. From Somaliland (Buthidae), František Kovařík, Graeme Lowe Dec 2021

Scorpions Of The Horn Of Africa (Arachnida: Scorpiones). Part Xxvii. Lanzatus Huluul Sp. N. From Somaliland (Buthidae), František Kovařík, Graeme Lowe

Euscorpius

The rare Horn of Africa buthid genus Lanzatus Kovařík, 2001 was newly collected in Somaliland in two localities. We describe a new species Lanzatus huluul sp. n. fully illustrated with color photos showing its morphology, habitus, hemispermatophore and collection areas.


Fine Scales, Broad Consequences: Drivers And Effects Of Microclimatic Variation In Great Smoky Mountains National Park, Jordan Rebecca Stark Dec 2021

Fine Scales, Broad Consequences: Drivers And Effects Of Microclimatic Variation In Great Smoky Mountains National Park, Jordan Rebecca Stark

Theses - ALL

Climate is highly variable at scales that are not captured by most weather and climate models due to local effects of topography and living systems. This variation in microclimate has been noted for many decades but has been difficult to incorporate into quantitative understanding of ecological systems and processes due to the large amount of data and complex models required to adequately describe fine-scale patterns across complex landscapes. In recent years, models of thermal microclimate variation have been developed using low-cost temperature sensors, but few of these models have been used to predict the effects of microclimatic variation on ecological …


Monitoring Photosynthetic Activity Using In Vivo Chlorophyll A Fluorescence In Microalgae And Cyanobacteria Biofilms In The Nerja Cave (Malaga, Spain), Yolanda Del Rosal, Juan Muñoz-Fernández, Paula S.M. Celis-Plá, Mariona Hernández-Mariné, Félix Álvarez-Gómez, Salvador Merino, Félix L. Figueroa Dec 2021

Monitoring Photosynthetic Activity Using In Vivo Chlorophyll A Fluorescence In Microalgae And Cyanobacteria Biofilms In The Nerja Cave (Malaga, Spain), Yolanda Del Rosal, Juan Muñoz-Fernández, Paula S.M. Celis-Plá, Mariona Hernández-Mariné, Félix Álvarez-Gómez, Salvador Merino, Félix L. Figueroa

International Journal of Speleology

The characterization of the most common photosynthetic biofilms in the Nerja Cave by the continuous monitoring of the in vivo chlorophyll a (Chl a) fluorescence and the incorporation of the irradiance as a new environmental variable related to previous studies in the cave, have allowed us to improve our knowledge about the photosynthetic pattern of the biofilms of the cave. Effective quantum yield (ΔF/Fm) and relative electron transport rate (rETR) were determined during periods of the light, whereas the maximal quantum yield (Fv /Fm) was determined during dark periods. Increases in …


Using Spatial Methods To Analyse Anthropogenic Predation Risk And Movement Ecology Of White-Tailed Deer (Odocoileus Virginianus), Rhiannon D. Kirton Dec 2021

Using Spatial Methods To Analyse Anthropogenic Predation Risk And Movement Ecology Of White-Tailed Deer (Odocoileus Virginianus), Rhiannon D. Kirton

Electronic Thesis and Dissertation Repository

Hunting has been used as a central tool by wildlife managers to maintain populations of game species, however, we still lack a good understanding of exactly how hunting influences deer biology. Technological advances in GPS data over the last two decades now enable us to perform more detailed analysis on the effects of human hunters on wildlife populations. This research explores the spatial ecology of hunters and White-tailed deer in the Cross Timbers ecoregion of Oklahoma. Using new statistical methodologies to analyse simultaneous GPS tracking data on deer and hunters to study their spatial interactions. The results show how new …


Retroviral Infection Dynamics In Maine's Wild Turkeys, Stephanie A. Shea Dec 2021

Retroviral Infection Dynamics In Maine's Wild Turkeys, Stephanie A. Shea

Electronic Theses and Dissertations

Widespread wild turkey reintroductions in the late 1900s have led to increases in population density and geographic distribution across North America. This rapid population expansion has put them into proximity with closely-related wild and domestic avian species, increasing the risks of pathogen transmission. Lymphoproliferative disease virus (LPDV) is an avian oncogenic retrovirus detected in wild turkeys in 2009, and previously known to infect domestic turkeys. Following its initial detection, surveys reported variable LPDV prevalence across eastern North America with most wild turkeys being asymptomatic, however diagnostic cases revealed 10% mortality of LPDV-infected individuals. Given its recent detection, little is known …


Coyote Management In San Francisco, Matthew Greer Dec 2021

Coyote Management In San Francisco, Matthew Greer

Master's Projects and Capstones

As cities in North America grow, coyotes have become progressively more important species in urban ecosystems. Moreover, as coyotes increasingly use these urban spaces, human-coyote conflicts have become more common, creating a need for new management strategies. This paper will explore how the city of San Francisco could create a new coyote management plan for its highly visible coyote population. San Francisco has had a persistent coyote population since the early 2000s (Todd, 2018). Currently, the coyote population is close to 100 individuals and is still growing (J. Young, Presidio Trust, pers. comm.). To explore this topic a literature review …


Joint Management Of Upland & Aquatic Habitat For The California Red-Legged Frog & California Tiger Salamander, Kyle E. Verblaauw Dec 2021

Joint Management Of Upland & Aquatic Habitat For The California Red-Legged Frog & California Tiger Salamander, Kyle E. Verblaauw

Master's Projects and Capstones

As federally and state protected amphibians, the California tiger salamander (Ambystoma californiense) and the California red-legged frog (Rana draytonii) are recipients of ample management focus. Both species face a variety of threats, including habitat loss and alteration, introduction of non-native species, spread of disease, and effects of climate change. While management plans for the California tiger salamander and California red-legged frog exist, they frequently do not consider both species in tandem and often contain multiple shortcomings. This document aims to address the shortfalls of current management by providing practical recommendations for jointly managing the upland and …


Fear Of The Human "Super-Predator" In African Mammals, Nikita R. Frizzelle Dec 2021

Fear Of The Human "Super-Predator" In African Mammals, Nikita R. Frizzelle

Electronic Thesis and Dissertation Repository

Humans’ exploitive killing of virtually every mammal species globally may result in a perception of humans as feared, ultra-lethal predators. In Africa, mammals are central to the continent’s tourism industry; however, it is largely unknown whether African mammals fear the presence of tourists. Firstly, I aimed to review how the presence of humans on the landscape affects African mammal behaviour. Of 31 studies, most authors reported that humans alter mammal behaviour in a manner that may negatively impact survival. To test if a fear of humans can pervade communities, I simulated the presence of humans, hunting, lions, and birds using …


Pushing It To The Limit: Determining Asian Elephant (Elephas Maximus) Olfactory Sensitivity And Discrimination Through A Behavioral Choice Task, Matthew S. Rudolph Dec 2021

Pushing It To The Limit: Determining Asian Elephant (Elephas Maximus) Olfactory Sensitivity And Discrimination Through A Behavioral Choice Task, Matthew S. Rudolph

Theses and Dissertations

Elephants have shown remarkable olfactory capabilities. Their sense of smell impacts their foraging choices, behavior, and ultimately, survival. Being able to detect a target odor can allow elephants to locate specific resources, identify threats, and find receptive conspecifics. Previous studies have shown that elephants can consistently detect target odors, but have not identified the limits of this detection. Thus, to investigate the extent of elephants’ odor detection capabilities, we tested Asian elephants in a two-step odor discrimination task. First, we investigated whether elephants could detect odors at varying levels of dilution after a training procedure, and then whether they could …


S5e11: Why Might Maine Lose Two Species Of Songbirds?, Ron Lisnet, Katherine Ruskin, Brian Olsen Dec 2021

S5e11: Why Might Maine Lose Two Species Of Songbirds?, Ron Lisnet, Katherine Ruskin, Brian Olsen

The Maine Question

Maine may lose two tidal marsh songbird species in the next few decades. Saltmarsh sparrows face extinction, while Acadian Nelson’s sparrows are threatened with extirpation — localized eradication with the possibility of survival elsewhere. Their populations along the Eastern Seaboard have been declining as sea level rise destroys their habitats and, according to a new University of Maine-led study, mercury exposure inhibits their reproduction.

In the final episode of Season 5 of “The Maine Question,” Kate Ruskin, a lecturer in ecology and environmental science at UMaine who spearheaded the recent mercury exposure study, and Brian Olsen, who is now an …


Energetic Tradeoffs, Infection, And Immunity In Wild Chimpanzees Of Uganda And Tanzania, Sarah Renee Phillips Dec 2021

Energetic Tradeoffs, Infection, And Immunity In Wild Chimpanzees Of Uganda And Tanzania, Sarah Renee Phillips

Anthropology ETDs

Infectious disease is a primary source of mortality for most mammal species, but scientists have little understanding of factors driving variation in infection and immunity between individuals, populations, and species in the wild. Life history theory provides an evolutionary framework for delineating distribution of available energy to competing physiological demands, including growth, reproduction, and maintenance. Early life reproduction should be favored over late life survival, but, in long-lived species, reproductive success is strongly tied to survival to old age. Slower pace of reproduction could allow investment in immunity, reducing risk of morbidity and mortality to infectious disease. Additionally, several host …


An Assessment Of The Diverse Freshwater Turtle Fauna Of Mississippi, Lucas Haralson Dec 2021

An Assessment Of The Diverse Freshwater Turtle Fauna Of Mississippi, Lucas Haralson

Master's Theses

Nestled within the Southeastern United States Turtle Priority Area, Mississippi boasts impressive freshwater turtle diversity and is home to 8.6% of extant turtle species. Despite this impressive richness, few studies have assessed freshwater turtle assemblages in this hotspot of aquatic diversity. This research aimed to elucidate the distributions and abundances of freshwater turtle species through a statewide investigation of all major river drainages of the state. Using baited hoop nets (90 cm and 120 cm diameter), turtles were collected, identified to species and sex, and measured, before being released. Turtle assemblages were assessed in both lotic and lentic environments from …


Spatiotemporal Variation Of An Eastern Tropical Pacific Pelagic Community Assessed With Free-Drifting Bruvs, Tyler Stephen Plum Dec 2021

Spatiotemporal Variation Of An Eastern Tropical Pacific Pelagic Community Assessed With Free-Drifting Bruvs, Tyler Stephen Plum

All HCAS Student Capstones, Theses, and Dissertations

Information about pelagic community diversity and ecology generally lags far behind that of coastal communities, and largely derives from fisheries data that do not reflect small and non-target species. We describe spatiotemporal vertebrate species diversity and variability over a 3,486 km2 area of highly productive pelagic marine ecosystem in Pacific Panama using drifting baited remote underwater video stations (BRUVS), a non-invasive fishery-independent sampling technique. We observed 26 taxa from 17 families, including 1 mammal, 3 reptile, 5 elasmobranch, and 17 teleost species. Community assemblages differed on and off the continental shelf and between wet (April – December) and dry …


Estimating Cattle Density Using Wildlife Cameras, Emily Bonebrake Dec 2021

Estimating Cattle Density Using Wildlife Cameras, Emily Bonebrake

Fall Student Research Symposium 2021

Quantifying the abundance and distribution of animal populations is critical for effective wildlife research and management. Due to their cost-effectiveness, wildlife cameras have become an increasingly popular tool for estimating population densities. Previously, this technique relied on ‘capture-recapture’ models that utilized re-sightings of individually marked animals, but in recent years methods have been developed to estimate the population densities of unmarked animals. One such method is the random encounter and staying time (REST) technique, which does this by assuming that the cumulative time animals stay within the view of the camera scales linearly with the number of individuals. This allows …


Understanding How Changes In Precipitation Intensity Will Affect Vegetation In The Western U.S., Cristina Chirvasa Dec 2021

Understanding How Changes In Precipitation Intensity Will Affect Vegetation In The Western U.S., Cristina Chirvasa

Fall Student Research Symposium 2021

Precipitation events are becoming more intense as the atmosphere warms, but it remains unclear how precipitation intensification will affect plant growth in arid and semiarid ecosystems. There is conflicting evidence suggesting that larger precipitation events may either increase or decrease plant growth. Here, we report the growth responses of herbaceous and woody plants to experimental manipulations of precipitation intensity in a cold, semi-arid ecosystem in Utah, USA. In this experiment, precipitation was collected and redeposited as fewer, larger events with total annual precipitation kept constant across treatments. Results from the first two growing seasons revealed that more intense events ‘pushed’ …


Distribution, Abundance, And Population Genetics Of The Alligator Snapping Turtle (Macrochelys Temminckii) In Mississippi, Luke Pearson Dec 2021

Distribution, Abundance, And Population Genetics Of The Alligator Snapping Turtle (Macrochelys Temminckii) In Mississippi, Luke Pearson

Dissertations

The southeastern United States is a freshwater turtle biodiversity hotspot, second only to southeastern Asia, and this region is inhabited by one of the largest freshwater turtles in the world: the alligator snapping turtle (Macrochelys temminckii). This species was heavily harvested from the 1960’s to the 1980’s for the turtle soup industry, apparently contributing to substantial, range-wide population declines. These declines, coupled with anthropogenic impacts on riverine and floodplain habitats, have led to M. temminckii being petitioned for federal listing under the U.S. Endangered Species Act; it is currently under review by the U.S. Fish and Wildlife Service …


Small Mammal Community Ecology And Ectoparasite Dynamics In A Tamaulipan Thornscrub Habitat, Brandi Giles Dec 2021

Small Mammal Community Ecology And Ectoparasite Dynamics In A Tamaulipan Thornscrub Habitat, Brandi Giles

Theses and Dissertations

Small mammals play many roles in ecosystems and are known as great indicators of overall ecosystem function and health, but they are also highly competent hosts for ticks and tick-borne disease. In this study, I gathered data on small mammal community ecology and species diversity, abundance, and overall ectoparasite (i.e., ticks) dynamics in a south Texas Tamaulipan thornscrub habitat. I also assessed differences in these parameters in edge versus interior habitats across a gradient of habitat fragmentation and species assemblage. Lastly, I assessed which host and environmental factors can be utilized for predicting parasitization of small mammals in this habitat. …


Soil Microbial Community Dynamics In Response To Prescribed Extreme Fires Following Juniperus Virginiana Invasion In The Loess Canyons Of Nebraska, Julie A. Fowler Dec 2021

Soil Microbial Community Dynamics In Response To Prescribed Extreme Fires Following Juniperus Virginiana Invasion In The Loess Canyons Of Nebraska, Julie A. Fowler

School of Natural Resources: Dissertations, Theses, and Student Research

In Nebraska and other regions of the Great Plains, the conifer Juniperus virginiana (eastern redcedar) is converting grasslands to dense woodlands. This is driven by the interacting drivers of fire suppression, altered grazing regimes, climate change and other anthropogenic factors, impacting the provisioning of ecosystem services. This vegetation state transition modifies water resource regulation and biogeochemical cycles leading to altered edaphic properties including soil microbial community composition. To restore these grasslands and control J. virginiana spread, prescribed extreme burns are implemented as a management tool through local prescribed burn associations. We hypothesized that the alternative state transition to dense J. …


Uncoupled Seasonal Variability Of Transparent Exopolymer And Coomassie Stainable Particles In Coastal Mediterranean Waters: Insights Into Sources And Driving Mechanisms, Marina Zamanillo, Eva Ortega-Retuerta, Carolina Cisternas-Novoa, Cèlia Marrasé, Carles Pelejero, Josep Pascual, Josep M. Gasol, Anja Engel, Rafel Simó Dec 2021

Uncoupled Seasonal Variability Of Transparent Exopolymer And Coomassie Stainable Particles In Coastal Mediterranean Waters: Insights Into Sources And Driving Mechanisms, Marina Zamanillo, Eva Ortega-Retuerta, Carolina Cisternas-Novoa, Cèlia Marrasé, Carles Pelejero, Josep Pascual, Josep M. Gasol, Anja Engel, Rafel Simó

Research outputs 2014 to 2021

Transparent exopolymer particles (TEP) and Coomassie stainable particles (CSP) are gel-like particles, ubiquitous in the ocean, that affect important biogeochemical processes including organic carbon cycling by planktonic food webs. Despite much research on both groups of particles (especially TEP) over many years, whether they exist as distinctly stainable fractions of the same particles or as independent particles, each with different driving factors, remains unclear. To address this question, we examined the temporal dynamics of TEP and CSP over 2 complete seasonal cycles at 2 coastal sites in the Northwestern Mediterranean Sea, the Blanes Bay Microbial Observatory (BBMO) and the L’Estartit …


A New Species Of Vaejovis From The Mule Mountains Above Bisbee, Arizona (Scorpiones: Vaejovidae), Brandon T. Myers, Richard F. Ayrey Dec 2021

A New Species Of Vaejovis From The Mule Mountains Above Bisbee, Arizona (Scorpiones: Vaejovidae), Brandon T. Myers, Richard F. Ayrey

Euscorpius

No abstract provided.