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Full-Text Articles in Life Sciences

Ecological And Economic Implications Of Increased Storm Frequency And Severity For Boreal Lakes, Kathryn Warner May 2019

Ecological And Economic Implications Of Increased Storm Frequency And Severity For Boreal Lakes, Kathryn Warner

Electronic Theses and Dissertations

In boreal regions, increased precipitation events have been linked to increased concentrations of dissolved organic carbon (DOC), however less is known about the extent and implications of these events on lakes. We assessed the effects of precipitation events on six drinking water lakes in Maine, USA to better understand how DOC concentration and quality change in response to precipitation events. Our results revealed three types of responses: (1) an initial spike in DOC concentrations and quality metrics; (2) a sustained increase in DOC concentrations and quality metrics and; (3) no change during all sampling periods. Lake residence time was a ...


The Economic And Social Values Associated With Small South Dakota Lakes, Aaron Patrick Sundmark Jan 2019

The Economic And Social Values Associated With Small South Dakota Lakes, Aaron Patrick Sundmark

Electronic Theses and Dissertations

The valuation of small fishing lakes is a vital component in understanding the importance of fishing and of recreational resources, in general. Knowing the values associated with such lakes is essential when prioritizing management activities. The overall value of a lake as a resource for human benefit is estimated as the summation of both instrumental and non-instrumental values. Instrumental values consist of economic and utilitarian values, as well as the values that a lake provides from ecosystem services. Non-instrumental values consider what the lake is worth as a good of its own, such as aesthetic, moral, and spiritual values gained ...


An Examination Of The Death Penalty, Alexandra N. Kremer Dec 2018

An Examination Of The Death Penalty, Alexandra N. Kremer

The Downtown Review

The death penalty, or capital punishment, is the use of execution through hanging, beheading, drowning, gas chambers, lethal injection, and electrocution among others in response to a crime. This has spurred much debate on whether it should be used for reasons such as ethics, revenge, economics, effectiveness as a deterrent, and constitutionality. Capital punishment has roots that date back to the 18th century B.C., but, as of 2016, has been abolished in law or practice by more than two thirds of the world’s countries and several states within the United States. Here, the arguments for and against ...


Quantitative Appraisal Of Non-Irrigated Cropland In South Dakota, Shelby Riggs Oct 2018

Quantitative Appraisal Of Non-Irrigated Cropland In South Dakota, Shelby Riggs

Honors Theses, University of Nebraska-Lincoln

This appraisal attempts to remove subjectivity from the appraisal process and replace it with quantitative analysis of known data to generate a fair market value of the subject property. Two methods of appraisal were used, the income approach and the comparable sales approach. For the income approach, I used the average cash rent for the region, the current property taxes for the subject property, and a capitalization rate based on Stokes' (2018) capitalization rate formula to arrive at my income-based valuation. For the comparable sales approach, I utilized Stokes' (2018) research in optimization modeling to estimate a market value for ...


An Empirical Analysis Of Climatic, Geographic, And Cultural Determinants Of International Tourism, Ethan Straus Jun 2018

An Empirical Analysis Of Climatic, Geographic, And Cultural Determinants Of International Tourism, Ethan Straus

Honors Theses

Each year, billions of people visit different countries all around the world. For many of those countries, tourism is their primary industry, leading to millions of jobs and dollars in revenue. It is expected that by 2020 total International Tourism Receipts will reach 2 trillion US dollars annually. Currently, tourism employs an estimated 200 million people around the world. With the continued progression of climate change, the tourism industry is facing a newfound threat. Global temperatures and the seal level are both expected to rise significantly by the end of the century. Additionally, the Intergovernmental Panel on Climate Change has ...


Adjusting Hail-Damaged Crops For Crop Insurance Reporting, William M. Edwards Jul 2016

Adjusting Hail-Damaged Crops For Crop Insurance Reporting, William M. Edwards

William Edwards

Hail damage to crops in north central Iowa caused great losses; the total of which will become more defined with harvest. The following guidelines are intended to help farmers through the process of adjusting hail-damaged crops for crop insurance reporting.


Adjusting Hail-Damaged Crops For Crop Insurance Reporting, William M. Edwards Jul 2016

Adjusting Hail-Damaged Crops For Crop Insurance Reporting, William M. Edwards

William Edwards

Hail damage to crops in north central Iowa caused great losses; the total of which will become more defined with harvest. The following guidelines are intended to help farmers through the process of adjusting hail-damaged crops for crop insurance reporting.


Adjusting Hail-Damaged Crops For Crop Insurance Reporting, William M. Edwards Jul 2016

Adjusting Hail-Damaged Crops For Crop Insurance Reporting, William M. Edwards

William Edwards

Hail damage to crops in north central Iowa caused great losses; the total of which will become more defined with harvest. The following guidelines are intended to help farmers through the process of adjusting hail-damaged crops for crop insurance reporting.


Adjusting Hail-Damaged Crops For Crop Insurance Reporting, William M. Edwards Jul 2016

Adjusting Hail-Damaged Crops For Crop Insurance Reporting, William M. Edwards

William Edwards

Hail damage to crops in north central Iowa caused great losses; the total of which will become more defined with harvest. The following guidelines are intended to help farmers through the process of adjusting hail-damaged crops for crop insurance reporting.


Slides: Environmental Flows In The Era Of 'River Anthropology', Rebecca Tharme Jun 2016

Slides: Environmental Flows In The Era Of 'River Anthropology', Rebecca Tharme

Coping with Water Scarcity in River Basins Worldwide: Lessons Learned from Shared Experiences (Martz Summer Conference, June 9-10)

Presenter: Rebecca Tharme, Riverfutures Ltd.

18 slides


Ratios And Benchmarks As Tools For Local Food Hub Decision-Making: A Comparative Case Study, Savanna May Lyons Jan 2016

Ratios And Benchmarks As Tools For Local Food Hub Decision-Making: A Comparative Case Study, Savanna May Lyons

Graduate Theses and Dissertations

Food hubs, or local food aggregation and distribution businesses, are triple-bottom-line firms that play an increasingly important role in connecting small and mid-sized farmers to wholesale and retail markets. This paper explores how food hubs can use their financial data to identify and address strengths and challenges in their operations. We propose a “dashboard” of key metrics and benchmarks for food hub managers, and apply it a comparative case study of four food hubs over three years of operations. We compare and contrast the liquidity, cash flow, efficiency, solvency and repayment capacity of the four cases, and analyze cross-cutting themes ...


An Exploratory Statistical Analysis Of The External And Internal Effects Of Art Museums In The United States, John Eder Aug 2015

An Exploratory Statistical Analysis Of The External And Internal Effects Of Art Museums In The United States, John Eder

Journal of Environmental and Resource Economics at Colby

An Exploratory Statistical Analysis of the External and Internal Effects of Art Museums in the United States


Assessing Nitrogen Credits From Clover Cover Crops And Effects Of Seed Inoculation, Ajay Nair, Kathleen Delate, Georgeanne Artz, Corene Bregendahl Jan 2015

Assessing Nitrogen Credits From Clover Cover Crops And Effects Of Seed Inoculation, Ajay Nair, Kathleen Delate, Georgeanne Artz, Corene Bregendahl

Iowa State Research Farm Progress Reports

A wide array of information is available on cover crop selection, planting date, and potential advantages, but very little data is available on cover crop performance under Iowa growing conditions. In order to expand cover crop options for Iowa growers, more precise and region-specific information is needed.


Suitability Of Winter Canola (Brassica Napus) For Enhancing Summer Annual Crop Rotations In Iowa, Mary H. Wiedenhoeft, Rafael A. Martinez-Feria, Thomas C. Kaspar, Keri L. Jacobs Jan 2015

Suitability Of Winter Canola (Brassica Napus) For Enhancing Summer Annual Crop Rotations In Iowa, Mary H. Wiedenhoeft, Rafael A. Martinez-Feria, Thomas C. Kaspar, Keri L. Jacobs

Leopold Center Completed Grant Reports

What are the prospects for winter canola as an alternative crop for Iowa farmers? This project examined the economics and costs/benefits of adding canola as a third crop or a cover crop in rotations.


The Extent And Impact Of Trust Ownership On The Sustainability And Resiliency Of Iowa’S Agricultural Landscape, Edward Cox, Michael Duffy Jan 2014

The Extent And Impact Of Trust Ownership On The Sustainability And Resiliency Of Iowa’S Agricultural Landscape, Edward Cox, Michael Duffy

Leopold Center Completed Grant Reports

The popularity of trusts as a land management tactic has been increasing. Using survey results, an attorney and economics professor examined the kinds of trust arrangements that exist in Iowa and how they might be used to encourage conservation practices and sustainable agricultural management.


Farm-Scale Costs And Returns For Second Generation Bioenergy Cropping Systems In The Us Corn Belt, Robert K. Manatt, Arne Hallam, Lisa A. Schulte, Emily A. Heaton, Theodore P. Gunther, Richard B. Hall, Kenneth J. Moore Sep 2013

Farm-Scale Costs And Returns For Second Generation Bioenergy Cropping Systems In The Us Corn Belt, Robert K. Manatt, Arne Hallam, Lisa A. Schulte, Emily A. Heaton, Theodore P. Gunther, Richard B. Hall, Kenneth J. Moore

Natural Resource Ecology and Management Publications

While grain crops are meeting much of the initial need for biofuels in the US, cellulosic or second generation (2G) materials are mandated to provide a growing portion of biofuel feedstocks. We sought to inform development of a 2G crop portfolio by assessing the profitability of novel cropping systems that potentially mitigate the negative effects of grain-based biofuel crops on food supply and environmental quality. We analyzed farm-gate costs and returns of five systems from an ongoing experiment in central Iowa, USA. The continuous corn cropping system was most profitable under current market conditions, followed by a corn–soybean rotation ...


Agronomic, Environmental And Economic Performance Of Alternative Biomass Cropping Systems, Lisa A. Schulte Moore, Kenneth J. Moore, Richard B. Hall, Arne Hallam, Matt Helmers Jan 2013

Agronomic, Environmental And Economic Performance Of Alternative Biomass Cropping Systems, Lisa A. Schulte Moore, Kenneth J. Moore, Richard B. Hall, Arne Hallam, Matt Helmers

Leopold Center Completed Grant Reports

If cellulosic biomass is to play a significant role in America's energy future, research needs to be conducted on the optimal production and placement practices. This project looked at a portfolio of biomass cropping systems that might be adopted for Iowa.


Agenda: A Low-Carbon Energy Blueprint For The American West, University Of Colorado Boulder. Natural Resources Law Center, University Of Colorado Boulder. Renewable And Sustainable Energy Institute, Western Resource Advocates, Rocky Mountain Research Station (Fort Collins, Colo.) Jun 2012

Agenda: A Low-Carbon Energy Blueprint For The American West, University Of Colorado Boulder. Natural Resources Law Center, University Of Colorado Boulder. Renewable And Sustainable Energy Institute, Western Resource Advocates, Rocky Mountain Research Station (Fort Collins, Colo.)

A Low-Carbon Energy Blueprint for the American West (Martz Summer Conference, June 6-8)

The future of the planet may depend upon our ability to increase energy supplies even as we reduce carbon emissions. This conference will address how a low-carbon energy program might evolve with a particular focus on the American West. It will focus on the future of energy in the West--on a “managed transition” to a different energy mix, on the need to nest this effort in a framework that acknowledges interconnections, and on identifying the most salient opportunities to consider the legal, political, financial, and technical challenges.


Transcendental Thermodynamics, Richard E. Morel, George Fleck Jun 2012

Transcendental Thermodynamics, Richard E. Morel, George Fleck

Kahn Institute Projects

Thermodynamics is often viewed as a narrow, introspective discipline, trapped by its origins in the 18th and 19th centuries. By dramatic contrast, we show that the Fourth Law of Thermodynamics provides explanations and interpretations of all natural events, extending across artificial boundaries of tradition- al academic disciplines. The Fourth Law of Thermodynamics states that far-from-equilibrium systems increase entropy at the maximum rate available to them. This broadly inclusive paradigm applies to systems from molecules, to organisms, to the biosphere. The Fourth Law is the Law of Evolution. All systems that communicate with their environment exhibit self-organization and self-optimization, enabling the ...


Economics Of Residue Harvest: Regional Partnership Evaluation, David W. Archer, David J. Muth Jr., Jacob J. Jacobson, Douglas L. Karlen Jan 2012

Economics Of Residue Harvest: Regional Partnership Evaluation, David W. Archer, David J. Muth Jr., Jacob J. Jacobson, Douglas L. Karlen

David J. Muth

Economic analyses on the viability of corn (Zea mays, L.) stover harvest for bioenergy production have largely been based on simulation modeling. While some studies have utilized field research data, most field-based analyses have included a limited number of sites and a narrow geographic distribution. An Iowa case study is developed illustrating the use of data extracted from a database of geographically distributed field studies for a region-specific economic analysis. The analysis utilizes grain and residue yield and associated management information from two Iowa field research sites that are Sun Grant Regional Partnership locations associated with the Corn Stover Regional ...


Economics Of Residue Harvest: Regional Partnership Evaluation, David W. Archer, David J. Muth Jr., Jacob J. Jacobson, Douglas L. Karlen Dec 2011

Economics Of Residue Harvest: Regional Partnership Evaluation, David W. Archer, David J. Muth Jr., Jacob J. Jacobson, Douglas L. Karlen

Douglas L Karlen

Economic analyses on the viability of corn (Zea mays, L.) stover harvest for bioenergy production have largely been based on simulation modeling. While some studies have utilized field research data, most field-based analyses have included a limited number of sites and a narrow geographic distribution. An Iowa case study is developed illustrating the use of data extracted from a database of geographically distributed field studies for a region-specific economic analysis. The analysis utilizes grain and residue yield and associated management information from two Iowa field research sites that are Sun Grant Regional Partnership locations associated with the Corn Stover Regional ...


Cellulosic Ethanol: The Benifits, Obstacles, And Implications For Nebraska, Cassidee Lin Thompson Apr 2010

Cellulosic Ethanol: The Benifits, Obstacles, And Implications For Nebraska, Cassidee Lin Thompson

Environmental Studies Undergraduate Student Theses

Abstract Ethanol is a biofuel that has unique capabilities to mitigate global climate change by reducing greenhouse gas emissions while simultaneously supporting rural economies and decreasing the United States’ dependence on foreign oil. Currently, the state of Nebraska depends on corn ethanol, which may be unsustainable. Cellulosic ethanol is a promising alternative but it is not without its problems, including high production costs and potential environmental damage. This thesis is an attempt to understand the benefits, downfalls, and processes of corn-based and cellulosic ethanol and the potential implications to Nebraska. This research should shed some light on the current obstacles ...


Slides: Intermountain Oil And Gas Bmp Project, Kathryn Mutz Oct 2009

Slides: Intermountain Oil And Gas Bmp Project, Kathryn Mutz

Best Practices for Community and Environmental Protection (October 14)

Presenter: Kathryn Mutz, Natural Resources Law Center

19 slides


Adjusting Hail-Damaged Crops For Crop Insurance Reporting, William M. Edwards Sep 2009

Adjusting Hail-Damaged Crops For Crop Insurance Reporting, William M. Edwards

Integrated Crop Management News

Hail damage to crops in north central Iowa caused great losses; the total of which will become more defined with harvest. The following guidelines are intended to help farmers through the process of adjusting hail-damaged crops for crop insurance reporting.


Applications And Potentials For Biogenic Methane Recovery Operations In Nebraska Agriculture, Industry, And Economic Development, David Micheal Dingman Jul 2009

Applications And Potentials For Biogenic Methane Recovery Operations In Nebraska Agriculture, Industry, And Economic Development, David Micheal Dingman

Environmental Studies Undergraduate Student Theses

ABSTRACT: This thesis report illustrates the applications and potentials of biogenic methane recovery in Nebraska’s agricultural and industrial sectors and as a means for increasing sustainable economic development in the state’s rural communities. As the nation moves toward a new green economy, biogenic methane recovery as a waste management strategy and renewable energy resource presents significant opportunities for Nebraska to be a national and world leader in agricultural and industrial innovation, advanced research and development of renewable energy technology, and generation of new product markets. Nebraska’s agricultural economy provides a distinct advantage to the state for supporting ...


Quantifying The Role Of Riparian Management To Control Non-Point Source Pollution Of Pasture And Cropland Streams, James R. Russell, Daniel G. Morrical, John Kovar, Daryl R. Strohbehn, John D. Lawrence, Mathew M. Haan, Shelly Lee Nellesen, Thomas M. Isenhart, Richard Schultz Jan 2009

Quantifying The Role Of Riparian Management To Control Non-Point Source Pollution Of Pasture And Cropland Streams, James R. Russell, Daniel G. Morrical, John Kovar, Daryl R. Strohbehn, John D. Lawrence, Mathew M. Haan, Shelly Lee Nellesen, Thomas M. Isenhart, Richard Schultz

Leopold Center Completed Grant Reports

Grazing management practices have the potential to mitigate some problems with sediment and phosphorus loading in pasture streams. The project demonstrated possible strategies to lessen grazing impacts on streams.


Slides: Rethinking Western Water Law: Whatever Happened To The Public Interest?, Mark Squillace Jun 2008

Slides: Rethinking Western Water Law: Whatever Happened To The Public Interest?, Mark Squillace

Shifting Baselines and New Meridians: Water, Resources, Landscapes, and the Transformation of the American West (Summer Conference, June 4-6)

Presenter: Mark Squillace, Director, Natural Resources Law Center, University of Colorado Law School

15 slides


Why Care About The Polar Bear?: Economic Analysis Of Natural Resources Law And Policy [Outline], Lisa Heinzerling Jun 2007

Why Care About The Polar Bear?: Economic Analysis Of Natural Resources Law And Policy [Outline], Lisa Heinzerling

The Future of Natural Resources Law and Policy (Summer Conference, June 6-8)

1 page.

"Lisa Heinzerling, Georgetown Law School" -- Agenda


A Tale Of Three Watersheds: Nonpoint Source Pollution And Conservation Practices Across Iowa, Keith E. Schilling, Mark D. Tomer, Philip W. Gassman, Catherine Kling, Thomas M. Isenhart, Thomas B. Moorman, William W. Simpkins, Calvin F. Wolter Jan 2007

A Tale Of Three Watersheds: Nonpoint Source Pollution And Conservation Practices Across Iowa, Keith E. Schilling, Mark D. Tomer, Philip W. Gassman, Catherine Kling, Thomas M. Isenhart, Thomas B. Moorman, William W. Simpkins, Calvin F. Wolter

Natural Resource Ecology and Management Publications

Many conservation practices and implementation programs exist to address nonpoint source (NPS) pollution losses from agricultural landscapes (Helmers et al., this issue). In order to select the most appropriate practices and programs for reducing NPS pollution in a specific region while maintaining economic return for the landowner, the interacting processes of agricultural management and watershed hydrology need to be understood across broad spatial scales. On a nationwide basis, it is easy to see how NPS pollution in one part of the country might be different than those in another region of the country. For example, cotton growers in the South ...


An Analysis Of The Iowan Angler's Fishing License Renewal Decision, Ryan R. French Jan 2006

An Analysis Of The Iowan Angler's Fishing License Renewal Decision, Ryan R. French

Retrospective Theses and Dissertations

The number of annual fishing licenses sold in Iowa has been in decline for two decades and has limited the amount of funds available to the Iowa Department of Natural Resources for fisheries management. The Iowa DNR is focused on reversing this trend through targeted marketing and efficient management of fishing resources. An analysis of Iowa anglers is performed with these goals in mind using past surveys and current customer data. The product of this analysis is a model which predicts whether a past customer will renew their license in the upcoming year. A logit model is developed using license ...