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Drivers And Patterns Of Iron Redox Cycling From Surface To Bedrock In A Deep Tropical Forest 1 Soil: A New Conceptual Model, Steven J. Hall, Daniel Liptzin, Heather L. Buss, Kristen DeAngelis, Whendee L. Silver 2018 Iowa State University

Drivers And Patterns Of Iron Redox Cycling From Surface To Bedrock In A Deep Tropical Forest 1 Soil: A New Conceptual Model, Steven J. Hall, Daniel Liptzin, Heather L. Buss, Kristen Deangelis, Whendee L. Silver

Steven J. Hall

Iron (Fe) reduction and oxidation are important biogeochemical processes coupled to decomposition, nutrient cycling, and mineral weathering, but factors controlling their rates and spatial distribution with depth are poorly understood in terrestrial soils. In aquatic ecosystems, Fe reduction often occurs below a zone of oxic sediments. We tested an alternative conceptual model for Fe redox cycling in terrestrial soils using a deep humid tropical forest soil profile. We hypothesized that Fe reduction in anaerobic microsites scales with depth variation in labile C and Fe availability, as opposed to bulk oxygen (O2). We measured bulk O2 at multiple depths from 0 ...


Muskrats, James E. Miller 2018 Mississippi State University

Muskrats, James E. Miller

Wildlife Damage Management Technical Series

The muskrat (Ondatra zibethicus) is a common, semi-aquatic rodent native to the United States (Figure 1). It spends its life in aquatic habitats and is well adapted for swimming.

Although muskrats are an important part of native ecosystems, their burrowing and foraging activities can damage agricultural crops, native marshes and water control systems, such as aquaculture and farm ponds and levees. Such damage can significantly impact agricultural crops like rice that rely on consistent water levels for growth.

Muskrats also cause damage by eating agricultural crops, other vegetation, and crayfish, mussels and other aquaculture products. Loss of vegetation from muskrat ...


Data: Pre-Fire Disturbance History Modulates Relationships Between Ground Cover And Post-Fire Conifer Regeneration, Nathan Gill, Dan Jarvis, Tom Veblen, John Rogan, Dominik Kulakowski 2018 Clark University

Data: Pre-Fire Disturbance History Modulates Relationships Between Ground Cover And Post-Fire Conifer Regeneration, Nathan Gill, Dan Jarvis, Tom Veblen, John Rogan, Dominik Kulakowski

Student Works

Understory vegetation and ground cover drive many important ecosystem processes, including tree seedling regeneration. The exact effect of ground cover on tree seedling establishment, survival, and growth depends on biophysical context. In subalpine forests, this context is largely determined by disturbances such as beetle outbreak, blowdown, and fire. Compounded disturbances that overlap in short succession can alter stand properties and trajectories in ways that are not predictable from the additive impact of individual disturbances. The aim of this study is to examine how compounded Dendroctonus rufipennis (spruce beetle; SB) outbreak followed by fire and compounded wind blowdown followed by fire ...


Animal Suicide: Evolutionary Continuity Or Anthropomorphism?, Antonio Preti 2018 Centro Medico Genneruxi

Animal Suicide: Evolutionary Continuity Or Anthropomorphism?, Antonio Preti

Animal Sentience: An Interdisciplinary Journal on Animal Feeling

Evolutionary processes are characterized by both continuity and discontinuity. Evidence on suicide in nonhuman animals is faint and often rests on the metaphorical or anthropomorphic use of the term. Suicidal behavior might be an evolutionary jump relatively recent in our species: a byproduct of living in groups of people who are not as closely related genetically as in social groups of nonhuman mammals.


Summer 2017 Survey Of Diamondback Terrapins In Jamaica Bay Wildlife Refuge, New York, Josephine Maresca 2017 Selected Works

Summer 2017 Survey Of Diamondback Terrapins In Jamaica Bay Wildlife Refuge, New York, Josephine Maresca

Josephine Maresca

No abstract provided.


Learning To Live With Wolves: Community-Based Conservation In The Blackfoot Valley Of Montana, Seth M. Wilson, Elizabeth H. Bradley, Gregory A. Neudecker 2017 University of Montana

Learning To Live With Wolves: Community-Based Conservation In The Blackfoot Valley Of Montana, Seth M. Wilson, Elizabeth H. Bradley, Gregory A. Neudecker

Human–Wildlife Interactions

We built on the existing capacity of a nongovernmental organization called the Blackfoot Challenge to proactively address wolf (Canis lupus)-livestock conflicts in the Blackfoot Valley of Montana. Beginning in 2007, wolves started rapidly recolonizing the valley, raising concerns among livestock producers. We built on an existing program to mitigate conflicts associated with an expanding grizzly bear population and worked within the community to build a similar program to reduce wolf conflicts using an integrative, multi-method approach. Efforts to engage the community included one-on-one meetings, workshops, field tours, and regular group meetings as well as opportunities to participate in data ...


Lake Sturgeon (Acipenser Fulvescens) Trophic Position And Movement Patterns In The Lower Niagara River, Ny, Eric Bruestle 2017 Buffalo State College

Lake Sturgeon (Acipenser Fulvescens) Trophic Position And Movement Patterns In The Lower Niagara River, Ny, Eric Bruestle

Great Lakes Center Masters Theses

Lake sturgeon Acipenser fulvescens were once widely distributed throughout the Laurentian Great Lakes. However, widespread overharvest and habitat degradation has diminished their numbers. The lower Niagara River, NY contains one of the few remaining recovering populations of lake sturgeon in New York State. The goal of this study was to characterize the trophic position of lake sturgeon in the context of an invasive species dominated food web and to describe their movement patterns and residency within the lower Niagara River. Stomach content analysis and stable nitrogen (δ15N) and carbon (δ13C) isotope analysis of tissue was used ...


Historical Change Of Seagrasses In The Mississippi And Chandeleur Sounds, Linh Thuy Pham 2017 University of Southern Mississippi

Historical Change Of Seagrasses In The Mississippi And Chandeleur Sounds, Linh Thuy Pham

Dissertations

Seagrasses are important coastal resources facing numerous stressors, and losses have been documented from local to global assessments. Under the broad theme of habitat loss and fragmentation, a study of historical change in total area and landscape configuration of seagrasses in the Mississippi and Chandeleur Sounds was conducted. Mapping data was collated from a multitude of previous projects from 1940 to 2011.

Comparisons of seagrass area among various studies that used different mapping methods can result in overestimation of area change and misleading conclusions of change over time. The vegetated seagrass area (VSA) data were generalized to a common resolution ...


A Novel Three-Way Interaction Among A Fish, Algae, And A Parasitic Copepod, John Waldman 2017 CUNY Queens College

A Novel Three-Way Interaction Among A Fish, Algae, And A Parasitic Copepod, John Waldman

Publications and Research

No abstract provided.


Iowa Monarch Conservation, Pest Management And Crop Production, Steven P. Bradbury, Tyler Grant, Niranjana Krishnan 2017 Iowa State University

Iowa Monarch Conservation, Pest Management And Crop Production, Steven P. Bradbury, Tyler Grant, Niranjana Krishnan

Integrated Crop Management Conference

The monarch butterfly population has experienced an 80% decline in North America over the past two decades (Brower et al., 2012; Pleasants and Oberhauser, 2013; Jepsen et al., 2015). The three to four hectares of occupied overwintering forest in 2016 and 2015 was well below a target of six hectares needed to support a resilient population and reduce the risk of quasi-extinction (loss of the North American migration) in the next 10 to 20 years (Semmens et al., 2016). In response to a petition to evaluate the status of the species, the U.S. Fish and Wildlife Service (USFWS) is ...


Weathered Mc252 Crude Oil-Induced Anemia And Abnormal Erythroid Morphology In Double-Crested Cormorants (Phalacrocorax Auritus) With Light Microscopic And Ultrastructural Description Of Heinz Bodies, Kendal E. Harr, Fred L. Cunningham, Chris A. Pritsos, Karen L. Pritsos, Thivanka Muthumalage, Brian S. Dorr, Katherine E. Horak, Katie C. Hanson-Dorr, Karen Dean, Dave Cacela, Andrew McFadden, Jane E. Link, Kate Healy, Pete L. Tuttle, Stephen j. Bursian 2017 Urika LLC

Weathered Mc252 Crude Oil-Induced Anemia And Abnormal Erythroid Morphology In Double-Crested Cormorants (Phalacrocorax Auritus) With Light Microscopic And Ultrastructural Description Of Heinz Bodies, Kendal E. Harr, Fred L. Cunningham, Chris A. Pritsos, Karen L. Pritsos, Thivanka Muthumalage, Brian S. Dorr, Katherine E. Horak, Katie C. Hanson-Dorr, Karen Dean, Dave Cacela, Andrew Mcfadden, Jane E. Link, Kate Healy, Pete L. Tuttle, Stephen J. Bursian

Brian S Dorr

Injury assessment of birds following the Deepwater Horizon (DWH) oil spill in 2010 was part of the Natural Resource Damage Assessment. One reported effect was hemolytic anemia with the presence of Heinz bodies (HB) in birds, however, the role of route and magnitude of exposure to oil is unknown. The purpose of the present study was to determine if double-crested cormorants (Phalacocorax auritis; DCCO) exposed orally and dermally to artificially weathered crude oil would develop hemolytic anemia including HB and reticulocytosis. In the oral experiment, sub-adult, mixed-sex DCCOs were fed control (n = 8) or oilinjected ...


Overview Of Avian Toxicity Studies For The Deepwater Horizon Natural Resource Damage Assessment, Steven j. Bursian, Courtney R. Alexander, Fred L. Cunningham, Dave Cacela, Karen M. Dean, Brian S. Dorr, Christine K. Ellis, Céline A.J. Godard-Codding, Christopher G. Guglielmo, Katie C. Hanson-Dorr, Kendall E. Harr, Katherine A. Healy, Michael J. Hooper, Katherine E. Horak, John P. Isanhart, L V. Kennedy, Jane E. Link, Ivan Maggini, J K. Moye, Christine R. Perez, Chris A. Pritsos, Susan A. Shriner, K A. Trust, Pete L. Tuttle 2017 Texas Tech University

Overview Of Avian Toxicity Studies For The Deepwater Horizon Natural Resource Damage Assessment, Steven J. Bursian, Courtney R. Alexander, Fred L. Cunningham, Dave Cacela, Karen M. Dean, Brian S. Dorr, Christine K. Ellis, Céline A.J. Godard-Codding, Christopher G. Guglielmo, Katie C. Hanson-Dorr, Kendall E. Harr, Katherine A. Healy, Michael J. Hooper, Katherine E. Horak, John P. Isanhart, L V. Kennedy, Jane E. Link, Ivan Maggini, J K. Moye, Christine R. Perez, Chris A. Pritsos, Susan A. Shriner, K A. Trust, Pete L. Tuttle

Brian S Dorr

The Oil Pollution Act of 1990 establishes liability for injuries to natural resources because of the release or threatof release of oil. Assessment of injury to natural resources resulting from an oil spill and development andimplementation of a plan for the restoration, rehabilitation, replacement or acquisition of natural resources tocompensate for those injuries is accomplished through the Natural Resource Damage Assessment (NRDA)process. The NRDA process began within a week of the Deepwater Horizon oil spill, which occurred on April 20,2010. During the spill, more than 8500 dead and impaired birds representing at least 93 avian species werecollected. In ...


Dermal Exposure To Weathered Mc252 Crude Oil Results In Echocardiographically Identifiable Systolic Myocardial Dysfunction In Double-Crested Cormorants (Phalacrocorax Auritus), Kendal E. Harr, M Rishniw, Tracy L. Rupp, Dave Cacela, Karen Dean, Brian S. Dorr, Katie C. Hanson-Dorr, Kate Healy, Katherine E. Horak, Jane E. Link, Drury R. Reavill, Stephen j. Bursian, Fred L. Cunningham 2017 Urika LLC

Dermal Exposure To Weathered Mc252 Crude Oil Results In Echocardiographically Identifiable Systolic Myocardial Dysfunction In Double-Crested Cormorants (Phalacrocorax Auritus), Kendal E. Harr, M Rishniw, Tracy L. Rupp, Dave Cacela, Karen Dean, Brian S. Dorr, Katie C. Hanson-Dorr, Kate Healy, Katherine E. Horak, Jane E. Link, Drury R. Reavill, Stephen J. Bursian, Fred L. Cunningham

Brian S Dorr


During the Deepwater Horizon Natural Resource Damage Assessment, gross morphologic cardiac abnormalities,
including softer, more distensible musculature, were noted upon gross necropsy in hearts from
laughing gulls and double-crested cormorants exposed to weathered MC252 crude oil. A species specific,  echocardiographic technique was developed for antemortem evaluation of function that was
used to evaluate and better char- acterize cardiac dysfunction. Control (n=12) and treated (n=13) cormorant groups of similar sex-ratio and ages were dermally treated with approximately 13 ml of water or weathered MC252 crude oil, respectively, every 3 days for 6 dosages. This resulted in a low to ...


Organ Weights And Histopathology Of Double-Crested Cormorants (Phalacrocorax Auritus) Dosed Orally Or Dermally With Artificially Weathered Mississippi Canyon 252 Crude Oil, Kendal E. Harr, Drury R. Reavill, Stephen j. Bursian, Dave Cacela, Fred L. Cunningham, Karen Dean, Brian S. Dorr, Katie C. Hanson-Dorr, Kate Healy, Katherine E. Horak, Jane E. Link, Susan A. Shriner, Robert E. Schmidt 2017 Urika LLC

Organ Weights And Histopathology Of Double-Crested Cormorants (Phalacrocorax Auritus) Dosed Orally Or Dermally With Artificially Weathered Mississippi Canyon 252 Crude Oil, Kendal E. Harr, Drury R. Reavill, Stephen J. Bursian, Dave Cacela, Fred L. Cunningham, Karen Dean, Brian S. Dorr, Katie C. Hanson-Dorr, Kate Healy, Katherine E. Horak, Jane E. Link, Susan A. Shriner, Robert E. Schmidt

Brian S Dorr

A series of toxicity tests were conducted to assess the effects of low to moderate exposure to artificially weathered Deepwater Horizon Mississippi Canyon 252 crude oil on representative avian species as part of the Natural Resource Damage Assessment. The present report summarizes effects of oral exposure (n=26) of double-crested cormorants (DCCO; Phalacrocorax auritus) to 5 or 10 ml oil kg1 day1 for up to 21 days or dermal application (n=25) of 13 ml oil to breast and back feathers every three days totaling 6 applications in 21 days onorgan weights ...


Changes In White Cell Estimates And Plasma Chemistry Measurements Following Oral Or External Dosing Of Double-Crested Cormorants, Phalacocoraxauritus, With Artificially Weathered Mc252 Oil, Karen Dean, Stephen j. Bursian, Dave Cacela, Michael Carney, Fred L. Cunningham, Brian S. Dorr, Katie C. Hanson-Dorr, Kate Healey, Katherine E. Horak, Jane E. Link, Ian Lipton, Andrew McFadden, Moira A. Mckernan, Kendal E. Harr 2017 Abt Consulting

Changes In White Cell Estimates And Plasma Chemistry Measurements Following Oral Or External Dosing Of Double-Crested Cormorants, Phalacocoraxauritus, With Artificially Weathered Mc252 Oil, Karen Dean, Stephen J. Bursian, Dave Cacela, Michael Carney, Fred L. Cunningham, Brian S. Dorr, Katie C. Hanson-Dorr, Kate Healey, Katherine E. Horak, Jane E. Link, Ian Lipton, Andrew Mcfadden, Moira A. Mckernan, Kendal E. Harr

Brian S Dorr

Scoping studies were designed whereby double-crested cormorants (Phalacocorax auritus) were dosed with artificially weathered Deepwater Horizon (DWH) oil either daily through oil injected feeder fish, or by application of oil directly to feathers every three days. Preening results in oil ingestion, and may be an effective means of orally dosing birds with toxicant to improve our understanding of the full range of physiological effects of oral oil ingestion on birds. Blood samples collected every 56 days were analyzed for a number of clinical endpoints including white blood cell (WBC) estimates and di ...


Spatially Explicit Model Of Areas Between Suitable Black Bear Habitat In East Texas And Black Bear Populations In Louisiana, Arkansas, And Oklahoma, Caitlin M. Glymph, Christopher Comer, Daniel Scognamillo, Daniel Unger, Yanli Zhang 2017 Stephen F Austin State University

Spatially Explicit Model Of Areas Between Suitable Black Bear Habitat In East Texas And Black Bear Populations In Louisiana, Arkansas, And Oklahoma, Caitlin M. Glymph, Christopher Comer, Daniel Scognamillo, Daniel Unger, Yanli Zhang

Electronic Theses and Dissertations

Although black bears (Ursus americanus, Ursus americanus luteolus) were once found throughout the south-central United States, unregulated harvest and habitat loss resulted in severe range retractions and by the beginning of the twentieth century populations in Oklahoma, Louisiana, Texas and Arkansas were nearing extirpation. In response to these losses, translocation programs were initiated in Arkansas (1958-1968 & 2000-2006) and Louisiana (1964-1967 & 2001-2009). These programs successfully restored bears to portions of Louisiana and Arkansas, and, as populations in Arkansas began dispersing, to Oklahoma. In contrast, east Texas remains unoccupied despite the existence of suitable habitat in the region.

To facilitate the establishment ...


, Bonnie Becker, Michael Behrens 2017 University of Washington Tacom

, Bonnie Becker, Michael Behrens

Bonnie Becker

Native Olympia oysters have been the subject of widespread restoration efforts across the west coast, including in the Salish Sea. The ultimate goal of restoration is to establish populations that are self-sustaining or even exporting new offspring to other appropriate habitats. It is difficult to study the early life history of marine invertebrates, which have a microscopic and planktonic larval form and often episodic settlement pulses. However, being able to predict larval behaviors and settlement preferences can allow practitioners to design habitats, choose sites, and distribute restoration networks more effectively. The purpose of this study, a collaboration among academic and ...


Response Of Anurans To Wetland Restoration On A Midwestern Agricultural Landscape, Paul E. Bartelt, Robert W. Klaver 2017 Waldorf University

Response Of Anurans To Wetland Restoration On A Midwestern Agricultural Landscape, Paul E. Bartelt, Robert W. Klaver

Robert Klaver

Since the early 1990s, >5,000 ha of historic wetlands (and adjacent prairie) have been restored on the row-crop agricultural landscape of Winnebago County, Iowa, USA. From 2008–2011, we surveyed 22 of these sites for probabilities of occupancy and colonization by Boreal Chorus Frogs (BCF; Pseudacris maculata), Northern Leopard Frogs (NLF; Lithobates pipiens), and American Toads (AT; Anaxyrus americanus). We used radio telemetry to measure patterns of movement and habitat use by 22 NLF and 54 AT and deployed biophysical models in available habitats to estimate their physiological costs. The BCF occupied 100% of restored wetlands; NLF and AT ...


Initial Observations Of Plastic-Lined Ponds For Fingerling Walleye Production, Matthew L. Rogge, Alan A. Moore, Christopher P. Clouse, Joseph E. Morris 2017 Iowa State University

Initial Observations Of Plastic-Lined Ponds For Fingerling Walleye Production, Matthew L. Rogge, Alan A. Moore, Christopher P. Clouse, Joseph E. Morris

Joseph Morris

Fish culture ponds are commonly fertilized to increase fish production through enhancement of the plankton forage base. Many fish culture facilities rely on natural production of zooplankton and aquatic insects as food sources for larval fish. Literature on pond fertilization regimes varies; recommendations range from no fertilization to a combination of inorganic and organic fertilizers. More research on the interactions among water quality, nutrients, plankton (phytoplankton and zooplankton) and fertilizers of the appropriate nutrient ratios is needed to move fertilization from an art to a science.


Effects Of Formulated Feed On Water Quality In Fingerling Waleye Production Ponds, Sarah E. Kaatz, Joseph E. Morris 2017 Iowa State University

Effects Of Formulated Feed On Water Quality In Fingerling Waleye Production Ponds, Sarah E. Kaatz, Joseph E. Morris

Joseph Morris

Six 0.04-ha plastic-lined ponds were used at the Iowa Department of Natural Resources’ Rathbun Fish Culture and Research Facility to evaluate the use of supplemental fish food on walleye (Sander vitreus) fingerling growth and survival, and on the benthic invertebrate community. Walleye were stocked 3-4 days post hatch on 2 May 2003, and harvested 5-6 June 2003. Organic fertilizer (alfalfa pellets, 112kg/ha/week) was used to increase primary production and inorganic fertilizers were added periodically to maintain a target nutrient ratio of 7:1 nitratenitrogen to total phosphorus (NO3-N: TP). Additional nutrients in the form of Lansy CW ...


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