Digital Commons Network^™

Widespread Crab Burrows Enhance Greenhouse Gas Emissions From Coastal Blue Carbon Ecosystems, Kai Xiao, Yuchen Wu, Feng Pan, Yingrong Huang, Hebo Peng, Meiqing Lu, Yan Zhang, Hailong Li, Yan Zheng, Chunmiao Zheng, Yan Liu, Nengwan Chen, Leilei Xiao, Guangxuan Han, Yasong Li, Pei Xin, Ruili Li, Bochao Xu, Faming Wang, Joseph J. Tamborski, Alicia M. Wilson, Daniel M. Alongi, Isaac R. Santos

OES Faculty Publications

Fiddler crabs, as coastal ecosystem engineers, play a crucial role in enhancing biodiversity and accelerating the flow of material and energy. Here we show how widespread crab burrows modify the carbon sequestration capacity of different habitats across a large climatic gradient. The process of crab burrowing results in the reallocation of sediment organic carbon and humus. Crab burrows can increase more greenhouse gases emissions compared to the sediment matrix (CO2: by 17-30%; CH4: by 49-141%). Straightforward calculations indicate that these increased emissions could offset 35-134% of sediment carbon burial in these two ecosystems. This research highlights the complex interactions between …

Testing Differential Predation As A Mechanism Of Color Polymorphism In A Cryptic Lizard., Justin A. Sanclemente

College of Graduate Studies: Theses & Dissertations

Selection via predation is a strong evolutionary force on small organisms, producing unique phenotypic adaptations. In cryptic species, different populations may exhibit color polymorphisms to better match multiple substrates or backgrounds. Here, I conducted a clay model study in the Ocala National Forest of Florida (USA) to test predation as a selective mechanism for color polymorphism in the Florida scrub lizard (Sceloporus woodi). Clay models were constructed to resemble light and dark morphs of S. woodi and placed on contrasting substrates in longleaf pine and Florida scrub stands. It is hypothesized Florida Scrub Jays (Aphelocoma coerulescens) …

From The Ground Up: A Complex Systems Approach To Climate Change Adaptation In Agriculture, Karen Buchsbaum

Antioch University Dissertations & Theses

Climate change presents an unprecedented challenge to global agriculture and food security. Small farms are especially vulnerable to the local impacts of large-scale drivers of change. Effective adaptation in agriculture requires working across scales, and geographic, political, and disciplinary boundaries to address barriers. I use elements of case study, agent-based modeling and serious games, to design a model of farmer decision-making using the sociocognitive framework of climate change adaptation. I examine how adaptation functions as a process, how complex dynamics influence farmer behavior, and how individual decisions influence collective behavior in response to climate change. This novel approach to adaptation …

A Revision Of Dyscolotaxia Horn, 1890 (Coleoptera: Eucnemidae: Macraulacinae: Macraulacini), With The Description Of Amazotaxia New Genus From South America, Robert L. Otto

Insecta Mundi

Abstract

The Neotropical eucnemid genus, Dyscolotaxia Horn, is revised following the examination of specimens from five collections, examination of the published original description of Plesiofornax tetratoma Chassain, and from images provided by Fernanda Salazar-Buenaño (QCAZI). Dyscolotaxia championi Horn is redescribed with included descriptions of the male genitalia and a female specimen. Three new species of false click beetles (Coleoptera: Eucnemidae) are described from the Neotropical region. These new species are: Dyscolotaxia chiriquiensis (Panama), Dyscolotaxia hispaniolensis (Dominican Republic), and Dyscolotaxia picea (Ecuador). Amazotaxia new genus is described from South America for Plesiofornax tetratoma Chassain, creating Amazotaxia tetratoma (Chassain) new combination. Morphology …

Evolution Of Primate Vocal Repertoires: Vocal Systems As Embodied Capital For Mediating Within-Group Conflict, Eric Schniter, Mateo Peñaherrera-Aguirre

ESI Working Papers

Life history traits constrain investments in costly neural and somatic embodied capital, potentially shaping the evolution of primate vocal communication systems. This study integrates life history theory with the social complexity hypothesis to test a sequential pathway from longevity to social dynamics to vocal repertoire size, using updated vocal repertoire data for McComb & Semple’s (2005) set of 42 non-human primate species, alongside measures of group size and within-group conflict. We compiled data on vocal repertoire size, within-group conflict, group size, endocranial volume, and maximum longevity, analysing these via Phylogenetic Sequential Canonical Cascade Model and ancestral character reconstructions. …

Description Of Sivalhippus (Equidae: Perissodactyla) From The Late Miocene Siwalik Sub-Group Of Pakistan, Muhammad Tahir Waseem, Ayesha Iqbal, Sania Zubaid, Abdul Majid Khan, Muhammad Ammar

Journal of Bioresource Management

New fossil mandible as well as isolated upper and lower dentitions of the late Miocene Hipparionine species, have been discovered from a locality of Chakwal, Punjab, Pakistan. By using morphometric and morphologic analysis, we have deduced that these specimens belong to Sivalhippus theobaldi. The body size of this species was intermediate between Sivalhippus perimensis and Hipparion antilopinum while its hypsodonty indicates that this species was a grazer to a larger extent which existed in mosaic of woodland and grassland in the Latest Miocene. However, the comparison with the recent horse (Equus caballus) mandible indicates some differences in …

Comparative Functional And Genomic Analysis Of Protein Targets Of Sexual Selection In Primates, Brianna Ports

Electronic Theses and Dissertations

Sexual selection is driven by the differential reproductive success of individuals, which is influenced by competition for mates and mate choice. In primates, this selective pressure has been attributed to the development of distinct anatomical, physiological, and behavioral characteristics. By employing comparative functional and genomic methodologies, this study aimed to assess the repercussions of primate sexual selection. To better understand the mechanisms driving sexually selected traits, an unbiased genome-wide analysis was used to associate rates of protein evolution with relative testes size and sexual size dimorphism. While previous research focused on the rapid evolution of male reproductive proteins in response …

The Effect Of Db1976 On The Fibrotic Response In Three-Spined Stickleback (Gasterosteus Aculeatus), Saif Quraishi

Honors Scholar Theses

The study of fibrosis in stickleback has been a growing field in which there have been a few studies conducted. This study examines two experiments involving the inhibition of fibrosis in stickleback. The first experiment used fish from the Kenai River Flats (KRF) in Alaska. The second experiment used fish from Roselle Lake in British Columbia, Canada. To determine the impact the drug had on fibrosis, sticklebacks from the KRF population were treated with DB1976 as well as alum, a pro‐inflammatory vaccine adjuvant that causes fibrosis (Kool et. al 2012). When each DB1976 + alum treatment group was compared with …

Targeting Macrophytes: Increased Water Quality Through Optimized Vegetation Considerations For Constructed Wetlands, Austin Mcbrady

Masters Theses (Archived)

This study of constructed wetland design investigated relationships between macrophyte species selection and planting density for water quality improvement. A lab-scale wetland was compared against a pilot-scale wetland in San Antonio, Texas at Mitchell Lake to measure differences in effluent water quality improvement using three native macrophyte species. Using a novel, two-phase method, a targeting macrophyte was identified from among other species based on its marked capability for improving water quality factors, then was planted in varied majority densities to compare differences in treatment effectiveness. The results of this study showed that this complimentary approach to wetland design displayed significant …

Interactive Effects Of Sublethal Concentrations Of Fracking Biocides And Abandoned Mine Drainage On Amphipod Behavior, Kelly Lenhart

Electronic Theses and Dissertations

This thesis examined the sublethal effects of three pollutants, namely glutaraldehyde, 4,4-dimethyloxazolidine (DMO), and abandoned mine drainage (AMD), on amphipods. The primary objective was to investigate their combined effects on amphipods. The three pollutants, despite having the potential to combine in the environment, have not been studied to determine their potential for detrimental interactive effects which could result in unexpected environmental damage.

The research employed a series of experimental setups involving controlled exposure of amphipods to varying, putatively sublethal, concentrations of the chemicals of interest. Subsequently, effects were assessed via both behavioral and feeding assessments. To facilitate this analysis, novel …

Habitat And Demography Of The Ozark Chinquapin (Castanea Ozarkensis) At Roaring River State Park In Barry County, Missouri, Danielle Evilsizor

Electronic Theses & Dissertations

The Ozark chinquapin, Castanea ozarkensis Ashe, is a chestnut tree with a range concentrated in the Interior Highlands of North America. Like other North American members of Castanea, it was reduced from an overstory tree to an understory shrub by the invasive chestnut blight fungus (Cryphonectria parasitica [Murrill] M.E. Barr) during the early 20^th century. However, relatively little is known about the habitat of this species or its health and reproductive capability post chestnut blight. Chapter one of this study analyzed the habitat of this species through a random forest species distribution model (SDM) to predict where …

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 …

Tropicalization Fact Sheet, Linda Walters, Carla Perscky

CEELAB Outreach Materials

The goal of this 2-sided fact sheet is to introduce the topic of tropicalization along our coastlines to young audiences and their families. Tropicalization is defined as, "the transformation of ecosystems by tropical organisms that migrate towards the poles in response to warming minimum winter temperatures."

Population Trends And Trophic Ecology Of The Invasive Peacock Eel (Macrognathus Siamensis) In The Florida Everglades, Grace Kahmann

Electronic Theses and Dissertations

Invasive species threaten the ecological integrity of ecosystems worldwide, including the Florida Coastal Everglades. This study investigated the ecological role of the peacock eel (Macrognathus siamensis) within this ecosystem, emphasizing its population trends and the environmental factors that affect its population performance, and the potential for interactions with native fish assemblages and coastal food webs. I used 19 years of electrofishing data to investigate the population trends of peacock eels at the marsh-mangrove ecotone of the Shark River Estuary, Everglades National Park (Florida, USA). I found that peacock eel populations have increased since their first detection in 2002, and their …

On Some Teratological Scorpions In The Natural History Museum, London And Checklist Of The Scorpiological Literature On Morphological Anomalies (Arachnida: Scorpiones), Danniella Sherwood, Luis F. De Armas

Euscorpius

Whilst undertaking curation in the collections of the Natural History Museum, London, the senior author came across a jar of scorpions marked ‘scorpions with curled feet’. Further investigation showed this jar was full of scorpions with teratological anatomy. We hereby document and illustrate all of the specimens and discuss their respective anomalies. Furthermore, a comprehensive checklist of the literature on anomalies in scorpions, including giving the life stage and sex where known, is compiled for the benefit of future workers.

Addressing Water Hyacinth (Pontederia Crassipes) Impacts On Aquatic Biota In Lake Okeechobee, Joseph Salerno

All HCAS Student Capstones, Theses, and Dissertations

The incursion of water hyacinth, Pontederia crassipes in Lake Okeechobee has resulted in management systems to be implemented to reduce the coverage of the invasive macrophyte. Its residence in the Lake Okeechobee ecosystem and the effects it has on organisms in the lake, whether it be positive or harmful is unknown. This study attempted to assess the potential effects that water hyacinth has on aquatic biota in Lake Okeechobee. Biotic data were collected on open water, water hyacinth covered, and native vegetation covered habitats via hook-and-line fishing, electrofishing, baited minnow traps, and the sampling of plant roots over a thirteen-month …

Of Changing Climate And Habitat: Range-Wide Individual Growth And Local Patterns Of Phenology And Landscape Use In A Threatened Pit-Viper, James Helferich

Theses and Dissertations

Over the 21st century, climate change and wetland habitat loss will pose major threats to the Eastern Massasauga (Sistrurus catenatus), a federally threatened and Great Lakes region endemic rattlesnake. I collected capture-recapture data from sites across the range and modeled the effect of climatic variables on growth rate and asymptotic size. I found that high snow residence time was associated with larger asymptotic sizes but slower growth, while high spring precipitation increased growth rate. I then projected future growth and size under different carbon emission scenarios. Given the threat posed by successional encroachment of woody vegetation, I used spatially explicit …

Towards Understanding The Interactions Between Ospreys And Human-Made Structures In The Tennessee River Valley, Natasha Karina Murphy

Theses and Dissertations

Raptor nests on human-built structures represent a significant source of conflict as they can result in bird mortality, fires, structure damage, service distribution, or power outages when falling nest materials or animals connect with energized conductors. Power companies, such as the Tennessee Valley Authority (TVA), wish to mitigate these conflicts to avoid service disruptions. In this dissertation, I present my work towards understanding and mitigating the interactions between Ospreys (Pandion haliaetus) and human-made structures. To achieve this, I explored multiple elements of conflict identification, monitoring, and basic ecology of the target species to better inform conflict mitigation. In Chapter I, …

Snail Races: An Inquiry-Based Approach To Learn Invasive Species Ecology, Emma Grindle, Heather E. Bergan-Roller, Ashton Johnson, Grace Lunaburg, Jennifer A.H. Koop

Faculty Articles, Papers, and Other Scholarship

Inquiry-based lessons allow learning that is hands-on and student-driven, fostering engagement and retention of knowledge in any discipline. Here, we use this learning framework to engage students in exploring the effects of biotic and abiotic factors on animal dispersal as a means of connecting students to multiple ecological concepts. Instructors are provided with a guided lecture on key ecological concepts including the impacts of invasive species, dispersal mechanisms, and species interactions with the environment. Furthermore, the interactive lecture introduces students to the snail study system and explains the experimental process, which involves low-cost, readily available materials (e.g., kiddie pools). Students …

Protective Responses Of The Intestinal Epithelial Cell Line Ht-29 Cells Exposed To Dephosphorylated Salmonella Flagellin [Research Note], Heyeon Baik, Jaiesoon Cho

The Philippine Agricultural Scientist

This study aimed to describe the effects of Salmonella Typhimurium flagellin (SFL) dephosphorylated by sweet potato purple acid phosphatase (PAP) on the protective responses of the intestinal epithelial cell line HT-29 cells. The enzyme was reported to display a broad substrate specificity for various organic phosphorylated conjugates and phosphoproteins. Dephosphorylation of SFL by sweet potato PAP decreased to 35% in the presence of 0.05 mM vanadate as compared with the negative control (p < 0.05). Intact SFL and the SFL treated with sweet potato PAP did not remarkably induce the activation of caspase-3 in HT-29 cells at all the tested levels of the substrate. Intact SFL maximally induced the release of IL (interleukin)-8 in HT-29 cells at 1000 ng/mL (p < 0.05). However, the SFL treated with the enzyme inhibited the release of IL-8 at over 100 ng/mL of the substrate as compared with intact SFL, resulting in an approximately 8-fold decrease even at 1000 ng/mL (p < 0.05). The SFL treated with the enzyme decreased the activation of the total ERK1/2 in the cells to 1.9 and 1.7–fold at 10 and 1000 ng/mL of the substrate, respectively, as compared with intact SFL (p < 0.05). In conclusion, sweet potato PAP could be a promising tool for controlling excessive inflammation during Salmonella infection in animal husbandry, and the enzyme could be a safe alternative that can overcome the drawbacks of chemotherapy.

The Influence Of Rusty Crayfish And Zebra Mussel Invasion On Yellow Perch Population Dynamics In North-Central Minnesota Lakes, Kendra Fink

Biology Graduate Theses

Over the last 50 years, Minnesota Department of Natural Resources standard fisheries survey catch rates of Yellow Perch have declined. Yellow Perch Perca flavescens are an important, widespread game fish, are essential prey species for Walleye Sander vitreus and other piscivorous fish and rely greatly on benthic resources through many life stages. Aquatic invasive species (AIS) like rusty crayfish Faxonius rusticus and zebra mussels Dreissena polymorpha have the potential to change water quality, vegetation and prey assemblages in aquatic systems and could cause shifts in energy flow, subsequently altering growth, condition, and maturity of native fish species. In this study, …

Effects Of A Protection Zone In A Reaction-Diffusion Model With Strong Allee Effect., Isaac Johnson

Electronic Theses and Dissertations

A protection zone model represents a patchy environment with positive growth over the protection zone and strong Allee effect growth outside the protection zone. Generally, these models are considered through the corresponding eigenvalue problem, but that has certain limitations. In this thesis, a general protection zone model is considered. This model makes no assumption on the direction of the traveling wave solution over the Strong Allee effect patch. We use phase portrait analysis of this protection zone model to draw conclusions about the existence of equilibrium solutions. We establish the existence of three types of equilibrium solutions and the necessary …

Impacts Of Environmental Stressors On Native South Dakota Amphibian Physiology And Survival, Danielle Jean Galvin

Dissertations and Theses

Amphibian populations around the world are declining, with some of the most likely drivers behind these declines including emerging infectious diseases and environmental contaminants. To address major gaps in the current literature, I sought to evaluate the effect of two major environmental stressors on various aspects of amphibian physiology: emerging infectious diseases and environmental contaminants. Emerging infectious diseases of amphibians include fungal, viral, and parasitic pathogens which have expanded in host range, either geographically or in competent host species. Environmental contaminants include chemicals which may be naturally occurring in the environment, or which may be introduced to the environment, often …

Fall Field Report, August–November 2023, W. Ross Silcock

Nebraska Bird Review

As in the last few fall seasons, late departure dates continue to increase in number. This is often attributed to a warming climate but may also result from increased observer activity and usage of eBird. Late dates are probably the most important aspect of this report, most prominent the record late fall dates for Ruby-throated Hummingbird, Sanderling, Bank Swallow, and Cassin’s Sparrow. Although these species are taxonomically diverse, there were species group concentrations of late dates, notably among shorebirds. Examples were Marbled Godwit for which the four latest reports this fall were four of the latest six fall dates on …

Index To Volume 91

Nebraska Bird Review

Adams: Pam 11; Paul 11
Aden, Debbie 55
Allard, Savannah 29
Allen, Edward 10
Allison, Betty 30
Alpheus, A. 154
Altman, Dakota 21, 30
Andersen: Bennett 30; Brett 30, 52, 142; D. E. 83
Anderson: Bob 139, 147; Chris 7; Janet 29; Will 68
Angkaew, Rongron 6
Ani, Groove-billed 127, 131
Anich: Charlie 99; Nick 99; Paula 99
Arends, Jim 30
Armstrong, Wyatt 121
Askerooth, Kristine 29
Atkins, Kate 16
Atwell, Erik 55, 58, 99, 100, 102, 112
Audubon, M. 82
Augustine, Jackie 63
Austin, Mary 7
Avocet, American 19, 53, 86, 100, 132, 158

. . .

Zach, Joel …

Yellow-Throated Warbler In Scotts Bluff County, Nebraska, Mark A. Brogie, Bill F. Huser, Jerry Probst

Nebraska Bird Review

Yellow-throated Warbler (Setophaga dominica) is a rare to uncommon migrant in eastern and central Nebraska. It is possibly a regular breeder locally at sites containing sycamores in several southeastern Nebraska counties bordering the Missouri River. There are few Nebraska reports after July, with more reports November–January than August–October. This species has three previous documented Nebraska Panhandle records, all from May.

1. One photographed 26 May 2009, at Crescent Lake NWR, Garden Co.

2. One seen and “well described” 06 May 1931, at Antioch, Sheridan Co.

3. A specimen taken 20 May 1917, at Oshkosh, Garden Co., was once …

Defensive Behaviors Of The Mealybug Nipaecoccus Nipae (Maskell, 1893) (Hemiptera: Pseudococcidae) And The Green Lacewing Ceraeochrysa Claveri (Navás, 1911) (Neuroptera: Chrysopidae), With Videos Of Dorsal Packet Loading And Mealybug Ostiole Function, Erin C. Powell

Insecta Mundi

The interactions between the lacewing Ceraeochrysa claveri (Navás) (Neuroptera: Chrysopidae) larva and the coconut mealybug Nipaecoccus nipae (Maskell) (Hemiptera: Pseudococcidae) were recorded. The third-instar lacewing larva constructed a dorsal packet using mealybug wax from both male pupal cases and the bodies of adult females. Surprisingly, live nymphs were also frequently placed into the dorsal packet. Prey mealybugs were discarded and not incorporated into the packet after consumption. When disturbed, adult female mealybugs reflex bled from their dorsal ostioles, contacting the mouthparts of the lacewing. The lacewing quickly retreated to clean the mouthparts on the substrate, providing further evidence that ostiolar …

Predicting The Potential Distribution In South Korea Of Two Mealybug Species (Hemiptera: Pseudococcidae) Intercepted On Pineapples In Quarantine, S Bin Kim, Soo-Jung Suh

Insecta Mundi

Dysmicoccus brevipes (Cockerell) and Dysmicoccus neobrevipes Beardsley are major pests of pine­apples, ornamentals, and vegetable crops in many countries around the world. The potential distribution of these mealybug pests into South Korea remains a prime concern because of their high incidence in intercep­tions screened during inspection. Hence, these species prompted a modelling effort to assess their potential risk of introduction. Potential risk maps were developed for these pests with the CLIMEX model based on occurrence records under environmental data. The potential distribution of these pests in South Korea in the 2020s, 2050s and 2090s is projected based on the RCP …

The Nebraska Bird Review (December 2023) 91(4), Whole Issue

Nebraska Bird Review

Fall Field Report, August–November 2023, by W. Ross Silcock

NOU Founding Ornithologist, Hypnotist, Physician: Isador Trostler, by Rick Wright

Yellow-throated Warbler in Scotts Bluff County, Nebraska, by Mark A. Brogie, Bill F. Huser, and Jerry Probst

Holdrege Fall Field Days, Sept. 22–24, 2023

Index to Volume 91

Subscription and Organization Information

Nou Founding Ornithologist, Hypnotist, Physician: Isador Trostler, Rick Wright

Nebraska Bird Review

Eminent radiologist Benjamin H. Orndoff, eulogizing an esteemed colleague some months after his death, noted that Isador Simon Trostler (1869–1957) “as a lad . . . became interested in ornithology and herpetology, sending accounts of his observations and explorations to natural history magazines up to the late [18]90s.” Understandably more interested in Trostler’s role as a “pioneer in radiology,” Orndoff had no more to say about the natural history pursuits of one of Nebraska’s most notable early ornithologists, one of the founders 125 years ago of the Nebraska Ornithologists’ Union.

Conversely, we birders have known little or nothing of Trostler’s …