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Full-Text Articles in Natural Resources and Conservation

Determining The Dynamics Of Agricultural Water Use: Cases From Asia And Africa, Lisa-Maria Rebelo, Robyn Johnston, Poolad Karimi, Peter G. Mccornick Apr 2014

Determining The Dynamics Of Agricultural Water Use: Cases From Asia And Africa, Lisa-Maria Rebelo, Robyn Johnston, Poolad Karimi, Peter G. Mccornick

Daugherty Water for Food Global Institute: Faculty Publications

Across Africa and Asia, water resources are being affected by a complex mixture of social, economic, and environmental factors. These include climate change and population growth, food prices, oil prices, financial disruptions, and political fluctuations. The need to produce more food will have one of the largest impacts on water and will continue to reshape the patterns of agricultural water use in major food-growing regions. With this increasing demand on water for agriculture, from large-scale irrigation to intensification of rainfed systems, it is becoming increasingly important to ensure that water resources decision-making has access to information that captures the spectrum …


Examples Of Non-Noetherian Domains Inside Power Series Rings, William Heinzer, Christel Rotthaus, Sylvia Wiegand Apr 2014

Examples Of Non-Noetherian Domains Inside Power Series Rings, William Heinzer, Christel Rotthaus, Sylvia Wiegand

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Given a power series ring R∗ over a Noetherian integral domain R and an intermediate field L between R and the total quotient ring of R∗, the integral domain A = L ∩ R∗ often (but not always) inherits nice properties from R∗ such as the Noetherian property. For certain fields L it is possible to approximate A using a localization B of a particular nested union of polynomial rings over R associated to A; if B is Noetherian, then B = A. If B is not Noetherian, we can sometimes identify the prime ideals of B that are not …


Droughtscape, Spring 2014, Kelly Smith Apr 2014

Droughtscape, Spring 2014, Kelly Smith

DroughtScape: Quarterly Newsletter of the National Drought Mitigation Center (2007–2023)

Contents

Director’s report

Outlook . 2

Drought climate recap 3

Drought impacts .

DroughtAtlas

Missouri River Basin pilot 9

NASA Horn of Africa project 10

U2U tools and social science . 12

Consulting for Turkey 14

Czech drought monitoring 14


Trouble In Paradise: State Of Coastal Erosion Of Unguja Tourist Destinations Shoreline Analysis And Community Responses Of Nungwi And Paje Beaches, Emily Pitman Apr 2014

Trouble In Paradise: State Of Coastal Erosion Of Unguja Tourist Destinations Shoreline Analysis And Community Responses Of Nungwi And Paje Beaches, Emily Pitman

Independent Study Project (ISP) Collection

Beach erosion is a significant problem facing the coastlines of Zanzibar. This study addresses the current status of coastal erosion for the beaches of Paje and Nungwi, Unguja Island, Zanzibar. These sites were selected for their popularity as tourist destinations and likelihood of significant anthropogenic influence on shoreline change. Field observations were made and indicators of erosion were recorded during transects in both locations. Sediment samples were collected at fixed intervals along the transects and then analyzed statistically for grain size distribution trends at the Institute of Marine Science. Interviews were conducted with village residents to determine community response, and …


The Invading Fly: Innovative Pest Management Solutions For Control Of Bactrocera Invadens In Pemba, Zanzibar, Mccall Calvert, Lindsay Gucker Apr 2014

The Invading Fly: Innovative Pest Management Solutions For Control Of Bactrocera Invadens In Pemba, Zanzibar, Mccall Calvert, Lindsay Gucker

Independent Study Project (ISP) Collection

An integrated pest management study was conducted targeting the invasive fruit fly, Bactrocera invadens, on the island of Pemba, Zanzibar. Male annihilation technique (MAT) traps were set in geographically dispersed sites featuring mango fruit hosts. Three locally sourced essential oils,eucalyptus citriodora, clove and lemongrass were tested against the standard attractant methyl eugenol. Rainfall quantities at each site were collected and interviews with local farmers were conducted on the subject of B. invadens infestation and management. Over the course of the two week study, April 2nd to April 18th, 2014, methyl eugenol baited traps had an …


Coastal And Ocean Economic Summaries Of The Coastal States 2014, Pat Johnston Mar 2014

Coastal And Ocean Economic Summaries Of The Coastal States 2014, Pat Johnston

Publications

The following summaries of the ocean and coastal economies were prepared by the National Ocean Economics Program as a companion the State of the U.S. Ocean and Coastal Economies 2014. The U.S. report, its appendices, and these state summary reports are available on the NOEP website at www.OceanEconomics.org/download.


Economic Impact Of The Commercial Fisheries On Local County Economies From Catch In All California National Marine Sanctuaries 2010, 2011 And 2012, Vernon R. Leeworthy, Desiree Jerome, Kelsey Schueler Jan 2014

Economic Impact Of The Commercial Fisheries On Local County Economies From Catch In All California National Marine Sanctuaries 2010, 2011 And 2012, Vernon R. Leeworthy, Desiree Jerome, Kelsey Schueler

Working Papers

This report estimates the economic impact of commercial fishing within all California National Marine Sanctuaries (CA NMS) according to the California Ocean Fish Harvester Economic Model (COFHE). The methodology applies county multipliers to estimates of harvest revenue from CA NMS in order to calculate output, income, value added and employment. This report also describes a profile of the commercial fish industry in the CA NMS. CA NMS includes all existing National Marine Sanctuary sites in California: Channel Islands (CINMS), Monterey Bay (MBNMS), Cordell Bank (CBNMS) and Gulf of the Farallones (GFNMS).

The three-year average for 2010 to 2012 finds that …


Warming, Soil Moisture, And Loss Of Snow Increase Bromus Tectorum’S Population Growth Rate, Aldo Compagnoni, Peter B. Adler Jan 2014

Warming, Soil Moisture, And Loss Of Snow Increase Bromus Tectorum’S Population Growth Rate, Aldo Compagnoni, Peter B. Adler

Green Canyon Environmental Research Area, Logan Utah

Climate change threatens to exacerbate the impacts of invasive species. In temperate ecosystems, direct effects of warming may be compounded by dramatic reductions in winter snow cover. Cheatgrass (Bromus tectorum) is arguably the most destructive biological invader in basins of the North American Intermountain West, and warming could increase its performance through direct effects on demographic rates or through indirect effects mediated by loss of snow. We conducted a two-year experimental manipulation of temperature and snow pack to test whether 1) warming increases cheatgrass population growth rate and 2) reduced snow cover contributes to cheatgrass’ positive response to …


On The Role Of Budget Sufficiency, Cost Efficiency, And Uncertainty In Species Management, Max Post Van Der Burg, Bartholomew B. Bly, Tammy Vercauteren, James B. Grand, Andrew J. Tyre Jan 2014

On The Role Of Budget Sufficiency, Cost Efficiency, And Uncertainty In Species Management, Max Post Van Der Burg, Bartholomew B. Bly, Tammy Vercauteren, James B. Grand, Andrew J. Tyre

School of Natural Resources: Faculty Publications

Many conservation planning frameworks rely on the assumption that one should prioritize locations for management actions based on the highest predicted conservation value (i.e., abundance, occupancy). This strategy may underperform relative to the expected outcome if one is working with a limited budget or the predicted responses are uncertain. Yet, cost and tolerance to uncertainty rarely become part of species management plans. We used field data and predictive models to simulate a decision problem involving western burrowing owls (Athene cunicularia hypugaea) using prairie dog colonies (Cynomys ludovicianus) in western Nebraska. We considered 2 species management strategies: …


Water Metrics, Lisa-Maria Rebelo, Jean-Marc Faurès, Poolad Karimi, Wim Bastiaanssen, Meredith Giordano, Vladimir Smakhtin, Peter G. Mccornick Jan 2014

Water Metrics, Lisa-Maria Rebelo, Jean-Marc Faurès, Poolad Karimi, Wim Bastiaanssen, Meredith Giordano, Vladimir Smakhtin, Peter G. Mccornick

Daugherty Water for Food Global Institute: Faculty Publications

Society has a universal need for water that crosses all sectors of activity. We need to be able to measure progress towards sustainable water for all by working towards targets that consider the different dimensions of water resources and use, including water quantity and quality. A suite of indicators that reflect water use by different sectors is needed to measure progress towards the forthcoming SDGs’ [sustainable development goals] water-related targets. Such indicators will need to rely on national data, must consider the variation in data availability, and can be complemented with new cost-effective ways for data collection.

Remote sensing measurements, …


Water-Food-Energy Nexus, Jeremy Bird, Felix Dodds, Peter G. Mccornick, Tushaar Shah Jan 2014

Water-Food-Energy Nexus, Jeremy Bird, Felix Dodds, Peter G. Mccornick, Tushaar Shah

Daugherty Water for Food Global Institute: Faculty Publications

The proposed SDGs on water, food and energy security all include targets on increasing efficiencies. Yet the water–food–energy nexus has multiple dimensions that, if managed in isolation, will compromise a nation’s ability to achieve the full portfolio of SDGs.

Climate change introduces additional uncertainties, further increasing tensions between sectors for access to water. Conventional energy and food production are emitters of greenhouse gases, but measures to reduce emissions—including renewable energy interventions, such as subsidies for biofuel production—can have adverse consequences on food prices.

To achieve desirable and sustainable outcomes for water, food, and energy requires investigating these elements as an …


Afrontar El Cambio: Cuidar Del Agua, De La Agricultura Y De La Seguridad Alimentaria En Una Era De Incertidumbre Climática, Peter G. Mccornick, Vladimir Smakhtin, Luna Bharati, Robyn Johnston, Matthew Mccartney, Fraser Sugden, Floriane Clement, Beverly Mcintyre Jan 2014

Afrontar El Cambio: Cuidar Del Agua, De La Agricultura Y De La Seguridad Alimentaria En Una Era De Incertidumbre Climática, Peter G. Mccornick, Vladimir Smakhtin, Luna Bharati, Robyn Johnston, Matthew Mccartney, Fraser Sugden, Floriane Clement, Beverly Mcintyre

Daugherty Water for Food Global Institute: Faculty Publications

En 1950, la población mundial era apenas superior a los 2500 millones de habitantes. En 2013, ronda los 7 mil millones. Aunque el crecimiento de la población se está ralentizando, se estima que en 2050 se alcanzarán los 9600 millones de habitantes. El aumento de la población será mayor en los países en desarrollo, donde los alimentos a menudo escasean, y la tierra y el agua están sometidas a presión. Para alimentar a la población mundial en 2050, tendrán que producirse más alimentos sin que haya un aumento significativo del terreno de cultivo y contando con un caudal menor de …


Fluoride Exposure From Groundwater As Reflected By Urinary Fluoride And Children’S Dental Fluorosis In The Main Ethiopian Rift Valley, Tewodros Rango, Avner Vengosh, Marc Jeuland, Redda Tekle-Haimanot, Erika Weinthal, Julia Kravchenko, Christopher Paul, Peter G. Mccornick Jan 2014

Fluoride Exposure From Groundwater As Reflected By Urinary Fluoride And Children’S Dental Fluorosis In The Main Ethiopian Rift Valley, Tewodros Rango, Avner Vengosh, Marc Jeuland, Redda Tekle-Haimanot, Erika Weinthal, Julia Kravchenko, Christopher Paul, Peter G. Mccornick

Daugherty Water for Food Global Institute: Faculty Publications

This cross-sectional study explores the relationships between children’s F− exposure from drinking groundwater and urinary F− concentrations, combined with dental fluorosis (DF) in the Main Ethiopian Rift (MER) Valley. We examined the DF prevalence and severity among 491 children (10 to 15 years old) who are lifelong residents of 33 rural communities in which groundwater concentrations of F− cover a wide range. A subset of 156 children was selected for urinary F− measurements. Our results showed that the mean F− concentrations in groundwater were 8.5 ± 4.1 mg/L (range: 1.1–18 mg/L), while those in urine …


The Effect Of Non-Fluoride Factors On Risk Of Dental Fluorosis: Evidence From Rural Populations Of The Main Ethiopian Rift, Julia Kravchenko, Tewodros Rango, Igor Akushevich, Behailu Atlaw, Peter G. Mccornick, R. Brittany Merola, Christopher Paul, Erika Weinthal, Courtney Harrison, Avner Vengosh, Marc Jeuland Jan 2014

The Effect Of Non-Fluoride Factors On Risk Of Dental Fluorosis: Evidence From Rural Populations Of The Main Ethiopian Rift, Julia Kravchenko, Tewodros Rango, Igor Akushevich, Behailu Atlaw, Peter G. Mccornick, R. Brittany Merola, Christopher Paul, Erika Weinthal, Courtney Harrison, Avner Vengosh, Marc Jeuland

Daugherty Water for Food Global Institute: Faculty Publications

Elevated level of fluoride (F−) in drinking water is a well-recognized risk factor of dental fluorosis (DF). While considering optimization of region-specific standards for F−, it is reasonable, however, to consider how local diet, water sourcing practices, and non-F− elements in water may be related to health outcomes. In this study, we hypothesized that non-F− elements in groundwater and lifestyle and demographic characteristics may be independent predictors or modifiers of the effects of F− on teeth. Dental examinations were conducted among 1094 inhabitants from 399 randomly selected households of 20 rural communities of …


Fluoride Exposure From Groundwater As Reflected By Urinary Fluoride And Children’S Dental Fluorosis In The Main Ethiopian Rift Valley, Tewodros Rango, Avner Vengosh, Marc Jeuland, Redda Tekle-Haimanot, Erika Weinthal, Julia Kravchenko, Christopher Paul, Paul Mccornick Jan 2014

Fluoride Exposure From Groundwater As Reflected By Urinary Fluoride And Children’S Dental Fluorosis In The Main Ethiopian Rift Valley, Tewodros Rango, Avner Vengosh, Marc Jeuland, Redda Tekle-Haimanot, Erika Weinthal, Julia Kravchenko, Christopher Paul, Paul Mccornick

Daugherty Water for Food Global Institute: Faculty Publications

This cross-sectional study explores the relationships between children’s F− exposure from drinking groundwater and urinary F− concentrations, combined with dental fluorosis (DF) in the Main Ethiopian Rift (MER) Valley. We examined the DF prevalence and severity among 491 children (10 to 15 This cross-sectional study explores the relationships between children’s F− exposure from drinking groundwater and urinary F− concentrations, combined with dental fluorosis (DF) in the Main Ethiopian Rift (MER) Valley. We examined the DF prevalence and severity among 491 children (10 to 15 years old) who are lifelong residents of 33 rural communities in which …


National Drought Management Policy Guidelines: A Template For Action, Donald A. Wilhite, World Meteorological Organization, Global Water Partnership, National Drought Mitigation Center Jan 2014

National Drought Management Policy Guidelines: A Template For Action, Donald A. Wilhite, World Meteorological Organization, Global Water Partnership, National Drought Mitigation Center

National Drought Mitigation Center: Faculty Publications

The implementation of a drought policy based on the philosophy of risk reduction can alter a nation’s approach to drought management by reducing the associated impacts (risk). This was the idea that motivated the World Meteorological Organization (WMO), the Secretariat of the United Nations Convention to Combat Desertification (UNCCD), and the Food and Agriculture Organization of the United Nations (FAO), in collaboration with a number of UN agencies, international and regional organizations, and key national agencies, to organize the Highlevel Meeting on National Drought Policy (HMNDP), which was held in Geneva from 11 to 15 March 2013. The theme of …


Pitzer College Outback Preserve Restoration Project, Paul Faulstich Jan 2014

Pitzer College Outback Preserve Restoration Project, Paul Faulstich

Pitzer Faculty Publications and Research

A question we keep asking ourselves in environmental analysis at Pitzer College is whether it’s possible to create modern socionatural systems that are truly sustaining; that is, that avoid the features of contemporary systems in which the human factor dominates to the detriment of the environment. Any genuinely sustainable society must honor diversity— cultural and biological—and, at Pitzer, we’re committed to forging innovative directions for a healthy future. Toward this end, students, along with faculty and staff, have initiated a program of ecological restoration in the Pitzer College Outback Preserve.


Adjudications, Brigette Buynak, Darcy S. Bushnell Jan 2014

Adjudications, Brigette Buynak, Darcy S. Bushnell

Water Matters!

Adjudications are lawsuits that take place in state or federal court to resolve all claims to water use in the state of New Mexico, including those of Pueblos, tribes and the federal government. These cases are required by statute to create a formal inventory of water uses and to facilitate administration of New Mexico’s surface and groundwater. The geographic scope of each case is generally described by a stream system and occasionally by a groundwater basin. By statute, the State is always the plaintiff. The mission is to formally identify and recognize all valid water rights in each area being …


Identifying Priority Conservation Areas For The American Burying Beetle, Nicrophorus Americanus (Coleoptera: Silphidae), A Habitat Generalist, Jessica D. Jurzenski, Christopher F. Jorgensen, Andy Bishop, Roger Grosse, John Riens, W. Wyatt Hoback Jan 2014

Identifying Priority Conservation Areas For The American Burying Beetle, Nicrophorus Americanus (Coleoptera: Silphidae), A Habitat Generalist, Jessica D. Jurzenski, Christopher F. Jorgensen, Andy Bishop, Roger Grosse, John Riens, W. Wyatt Hoback

United States Fish and Wildlife Service: Publications

Conservation efforts leading to the recovery of the federally endangered American burying beetle (ABB), Nicrophorus americanus Olivier, have been challenging because of the unknown causes of its decline, difficulty in establishing habitat requirements, and unclear population distribution across the species’ range. Extant populations of this widespread generalist species occur in broadly separated regions of North America with varying habitat characteristics. A habitat suitability model for ABB in the Nebraska Sandhills was developed over the course of 3 years resulting in a final cross-validated spatial model. The succession of models from 2009 to 2011 indicated that most of the predictive variables …


Assessing And Managing Freshwater Ecosystems Vulnerable To Environmental Change, David G. Angeler, Craig R. Allen, Hannah E. Birgé, Stina Drakare, Brendan G. Mckie, Richard K. Johnson Jan 2014

Assessing And Managing Freshwater Ecosystems Vulnerable To Environmental Change, David G. Angeler, Craig R. Allen, Hannah E. Birgé, Stina Drakare, Brendan G. Mckie, Richard K. Johnson

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Freshwater ecosystems are important for global biodiversity and provide essential ecosystem services. There is consensus in the scientific literature that freshwater ecosystems are vulnerable to the impacts of environmental change, which may trigger irreversible regime shifts upon which biodiversity and ecosystem services may be lost. There are profound uncertainties regarding the management and assessment of the vulnerability of freshwater ecosystems to environmental change. Quantitative approaches are needed to reduce this uncertainty. We describe available statistical and modeling approaches along with case studies that demonstrate how resilience theory can be applied to aid decision-making in natural resources management. We highlight especially …


On Target For People And Planet: Setting And Achieving Water-Related Sustainable Development Goals, Julie Van Der Bliek, Peter G. Mccornick, James Clarke Jan 2014

On Target For People And Planet: Setting And Achieving Water-Related Sustainable Development Goals, Julie Van Der Bliek, Peter G. Mccornick, James Clarke

Daugherty Water for Food Global Institute: Faculty Publications

Our specific focus in this book is on securing water for sustainable food production. This links to sustainable water resources management, delivering on the water supply and sanitation requirements and provisioning water for energy and the urban sector. A specific intent is to ensure that the realities in low- and middle-income countries in Africa and Asia are recognized and to provide practical pathways to change that fit these realities and the aspirations of those countries. This will help to prepare for the next step in the SDG [sustainable development goals] process: devolving the SDGs to the national level. It will …


Using Posts To An Online Social Network To Assess Fishing Effort, Dustin R. Martin, Christopher J. Chizinski, Kent M. Eskridge, Kevin L. Pope Jan 2014

Using Posts To An Online Social Network To Assess Fishing Effort, Dustin R. Martin, Christopher J. Chizinski, Kent M. Eskridge, Kevin L. Pope

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Fisheries management has evolved from reservoir to watershed management, creating a need to simultaneously gather information within and across interacting reservoirs. However, costs to gather information on the fishing effort on multiple reservoirs using traditional creel methodology are often prohibitive. Angler posts about reservoirs online provide a unique medium to test hypotheses on the distribution of fishing pressure. We show that the activity on an online fishing social network is related to fishing effort and can be used to facilitate management goals. We searched the Nebraska Fish and Game Association Fishing Forum for all references from April 2009 to December …


The Effects That Liquid And Solid Cattle Manure Have On The Water Quality Of Drainage Ditches In Putnam County, Ohio, Janelle Horstman Jan 2014

The Effects That Liquid And Solid Cattle Manure Have On The Water Quality Of Drainage Ditches In Putnam County, Ohio, Janelle Horstman

Honors Projects

Lake Erie has experienced harmful algal blooms with increased frequency since the mid-1990s due to excess nutrients from Rivers, such as the Maumee River, and largely agricultural watersheds. Nonpoint source pollution from agriculture contributes to eutrophication, algal blooms, and the degradation of water quality. This creates stress on aquatic fauna, reduced aesthetic quality, odor, and limits of the water for usage of drinking, recreation, and industry. This research paper asks what the contributions of having access to manure application records, soil records, and information about antibiotics have on what is known about manure management and antibiotic resistance, which has been …


Droughtscape, Winter 2014, Kelly Smith Jan 2014

Droughtscape, Winter 2014, Kelly Smith

DroughtScape: Quarterly Newsletter of the National Drought Mitigation Center (2007–2023)

Contents

Director’s report

Outlook & quarterly review . 2

Drought in 2013 review.

Quarterly impacts review . 5

Impacts in 2013 review.

Belmont Forum research0

USDM change maps 11

Central Asia drought planning

Kansas RC&D planning

Publication compares plans

Drought for planners webinar

Soil moisture networks

Kansas farm and ranch planning

$500 to develop leadership

Kids seek solutions

Plains symposium April 1-4


Exploring Integrated Crop–Livestock Systems In Different Ecoregions Ofthe United States, R Mark Sulc, Alan J. Franzluebbers Jan 2014

Exploring Integrated Crop–Livestock Systems In Different Ecoregions Ofthe United States, R Mark Sulc, Alan J. Franzluebbers

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Large-scale, energy-intensive, specialized production systems have dominated agricultural production inthe United States for the past half-century. Although highly productive and economically successful, thereis increasing concern with unintended negative environmental impacts of current agricultural systems.Production systems integrating crops and livestock have potential for providing additional ecosystem ser-vices from agriculture by capturing positive ecological interactions and avoiding negative environmentaloutcomes, while sustaining profitability. A diversity of ecologically sound integrated crop-livestock sys-tems have been and can be employed in different ecoregions: sod-based crop rotations, grazing covercrops in cash-crop rotations, crop residue grazing, sod intercropping, dual-purpose cereal crops, and agro-forestry/silvopasture. Improved technologies in conservation tillage, …


Assessing Resilience In Stressed Watersheds, Kristine T. Nemec, Joana Chan, Christina Hoffman, Trisha L. Spanbauer, Joseph A. Hamm, Craig R. Allen, Trevor Hefley, Donald Pan, Prabhakar Shrestha Jan 2014

Assessing Resilience In Stressed Watersheds, Kristine T. Nemec, Joana Chan, Christina Hoffman, Trisha L. Spanbauer, Joseph A. Hamm, Craig R. Allen, Trevor Hefley, Donald Pan, Prabhakar Shrestha

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Although several frameworks for assessing the resilience of social-ecological systems (SESs) have been developed, some practitioners may not have sufficient time and information to conduct extensive resilience assessments. We have presented a simplified approach to resilience assessment that reviews the scientific, historical, and social literature to rate the resilience of an SES with respect to nine resilience properties: ecological variability, diversity, modularity, acknowledgement of slow variables, tight feedbacks, social capital, innovation, overlap in governance, and ecosystem services. We evaluated the effects of two large-scale projects, the construction of a major dam and the implementation of an ecosystem recovery program, on …


Self-Imposed Length Limits In Recreational Fisheries, Christopher J. Chizinski, Dustin R. Martin, Keith L. Hurley, Kevin L. Pope Jan 2014

Self-Imposed Length Limits In Recreational Fisheries, Christopher J. Chizinski, Dustin R. Martin, Keith L. Hurley, Kevin L. Pope

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

A primary motivating factor on the decision to harvest a fish among consumptive-orientated anglers is the size of the fish. There is likely a cost-benefit trade-off for harvest of individual fish that is size and species dependent, which should produce a logistic-type response of fish fate (release or harvest)as a function of fish size and species. We define the self-imposed length limit as the length at which a captured fish had a 50% probability of being harvested, which was selected because it marks the length of the fish where the probability of harvest becomes greater than the probability of release. …


Panarchy: Theory And Application, Craig R. Allen, David G. Angeler, Ahjond S. Garmestani, Lance H. Gunderson, C. S. Holling Jan 2014

Panarchy: Theory And Application, Craig R. Allen, David G. Angeler, Ahjond S. Garmestani, Lance H. Gunderson, C. S. Holling

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

The concept of panarchy provides a framework that characterizes complex systems of people and nature as dynamically organized and structured within and across scales of space and time. It has been more than a decade since the introduction of panarchy. Over this period, its invocation in peer-reviewed literature has been steadily increasing, but its use remains primarily descriptive and abstract. Here, we discuss the use of the concept in the literature to date, highlight where the concept may be useful, and discuss limitations to the broader applicability of panarchy theory for research in the ecological and social sciences. Finally, we …


Discontinuities, Cross-Scale Patterns, And The Organization Of Ecosystems, Kirsty L. Nash, Craig R. Allen, David G. Angeler, Chris Barichievy, Tarsha Eason, Ahjond S. Garmestani, Nicholas A. J. Graham, Dean Granholm, Melinda Knutson, R. John Nelson, Magnus Nyström, Craig A. Stow, Shana M. Sundstrom Jan 2014

Discontinuities, Cross-Scale Patterns, And The Organization Of Ecosystems, Kirsty L. Nash, Craig R. Allen, David G. Angeler, Chris Barichievy, Tarsha Eason, Ahjond S. Garmestani, Nicholas A. J. Graham, Dean Granholm, Melinda Knutson, R. John Nelson, Magnus Nyström, Craig A. Stow, Shana M. Sundstrom

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Ecological structures and processes occur at specific spatiotemporal scales, and interactions that occur across multiple scales mediate scale-specific (e.g., individual, community, local, or regional) responses to disturbance. Despite the importance of scale, explicitly incorporating a multi-scale perspective into research and management actions remains a challenge. The discontinuity hypothesis provides a fertile avenue for addressing this problem by linking measureable proxies to inherent scales of structure within ecosystems. Here we outline the conceptual framework underlying discontinuities and review the evidence supporting the discontinuity hypothesis in ecological systems. Next we explore the utility of this approach for understanding cross-scale patterns and the …


Predicted Avian Responses To Bioenergy Development Scenarios In An Intensive Agricultural Landscape, Daniel R. Uden, Craig R. Allen, Rob B. Mitchell, Tim D. Mccoy, Qingfeng Guan Jan 2014

Predicted Avian Responses To Bioenergy Development Scenarios In An Intensive Agricultural Landscape, Daniel R. Uden, Craig R. Allen, Rob B. Mitchell, Tim D. Mccoy, Qingfeng Guan

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Conversion of native prairie to agriculture has increased food and bioenergy production but decreased wildlife habitat. However, enrollment of highly erodible cropland in conservation programs has compensated for some grassland loss. In the future, climate change and production of second-generation perennial biofuel crops could further transform agricultural landscapes and increase or decrease grassland area. Switchgrass (Panicum virgatum) is an alternative biofuel feedstock that may be economically and environmentally superior to maize (Zea mays) grain for ethanol production on marginally productive lands. Switchgrass could benefit farmers economically and increase grassland area, but there is uncertainty as to how conversions between rowcrops, …