Open Access. Powered by Scholars. Published by Universities.®

Environmental Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

32839 Full-Text Articles 40113 Authors 9854727 Downloads 271 Institutions

All Articles in Environmental Sciences

Faceted Search

32839 full-text articles. Page 1 of 714.

The Contribution Of Local And Transport Processes To Phytoplankton Biomass Variability Over Different Timescales In The Upper James River, Virginia, Qubin Qin, Jian Shen 2018 Virginia Institute of Marine Science

The Contribution Of Local And Transport Processes To Phytoplankton Biomass Variability Over Different Timescales In The Upper James River, Virginia, Qubin Qin, Jian Shen

Articles

Although both local processes (photosynthesis, respiration, grazing, and settling), and transport processes (advective transport and diffusive transport) significantly affect local phytoplankton dynamics, it is difficult to separate their contributions and to investigate the relative importance of each process to the local variability of phytoplankton biomass over different timescales. A method of using the transport rate is introduced to quantify the contribution of transport processes. By combining the time-varying transport rate and high-frequency observed chlorophyll a data, we can explicitly examine the impact of local and transport processes on phytoplankton biomass over a range of timescales from hourly to annually. For ...


Importance Of Scale, Land Cover, And Weather On The Abundance Of Bird Species In A Managed Forest, Alexis R. Grinde, Gerald J. Niemi, Brian R. Sturtevant, Hannah Panci, Wayne Thogmartin, Peter Wolter 2017 University of Minnesota - Duluth

Importance Of Scale, Land Cover, And Weather On The Abundance Of Bird Species In A Managed Forest, Alexis R. Grinde, Gerald J. Niemi, Brian R. Sturtevant, Hannah Panci, Wayne Thogmartin, Peter Wolter

Natural Resource Ecology and Management Publications

Climate change and habitat loss are projected to be the two greatest drivers of biodiversity loss over the coming century. While public lands have the potential to increase regional resilience of bird populations to these threats, long-term data are necessary to document species responses to changes in climate and habitat to better understand population vulnerabilities. We used generalized linear mixed models to determine the importance of stand-level characteristics, multi-scale land cover, and annual weather factors to the abundance of 61 bird species over a 20-year time frame in Chippewa National Forest, Minnesota, USA. Of the 61 species modeled, we were ...


Grace's "Making Peace With The Earth: Action And Advocacy For Climate Justice" (Book Review), Dolores Yilibuw 2017 Lexington Theological Seminary

Grace's "Making Peace With The Earth: Action And Advocacy For Climate Justice" (Book Review), Dolores Yilibuw

The Christian Librarian

No abstract provided.


Living Mulch For Sustainable Maize Stover Biomass Harvest, Cynthia A. Bartel, Chumki Banik, Andrew W. Lenssen, Kenneth J. Moore, David A. Laird, Sotirios V. Archontoulis, Kendall R. Lamkey 2017 Iowa State University

Living Mulch For Sustainable Maize Stover Biomass Harvest, Cynthia A. Bartel, Chumki Banik, Andrew W. Lenssen, Kenneth J. Moore, David A. Laird, Sotirios V. Archontoulis, Kendall R. Lamkey

Kendall R Lamkey

The Renewable Fuels Standard mandate provides enhanced opportunity for maize (Zea mays L.) stover use as a bioenergy feedstock. Living mulch (LM) offers a possible solution for the natural resources constraints associated with maize stover biomass harvest. A two site-year study was conducted near Boone and Kanawha, IA, in both maize following maize (MM) and maize following soybean [Glycine max (L.) Merr.] (SM) sequences to evaluate the impact of established and chemically suppressed Kentucky bluegrass (Poa pratensis L.) (KB) ‘Ridgeline’, ‘Wild Horse’, ‘Oasis’, and ‘Mallard’ blend and creeping red fescue (Festuca rubra L.) (CF) ‘Boreal’ as LM on three maize ...


Book Review Of Serendipity: An Ecologist’S Quest To Understand Nature, E. E. Ball, D. M. Adams, J. N. Dupuie Jr., M. M. Jones, P. G. McGovern, R. M. Ruden, S. R. Schmidt, G. J. Vaziri, J. S. Eeling, B. D. Kirk, A. L. McCombs, A. B. Rabinowitz, K. M. Thompson, Z. J. Hudson, Robert W. Klaver 2017 Iowa State University

Book Review Of Serendipity: An Ecologist’S Quest To Understand Nature, E. E. Ball, D. M. Adams, J. N. Dupuie Jr., M. M. Jones, P. G. Mcgovern, R. M. Ruden, S. R. Schmidt, G. J. Vaziri, J. S. Eeling, B. D. Kirk, A. L. Mccombs, A. B. Rabinowitz, K. M. Thompson, Z. J. Hudson, Robert W. Klaver

Robert Klaver

A common thought among graduate students is: “how do established scientists get where they are today?” In Serendipity: An Ecologist’s Quest to Understand Nature, James Estes offers a personal reflection on research experiences spanning his 50-year career, beginning as a Ph.D. student in 1970 and concluding with recognition as a member of the National Academy of Sciences in 2014. Estes chronologically outlines the foundational trophic cascade ecology research that he and colleagues conducted in the Aleutian Islands, examining key relationships among kelp forests, sea otters, sea urchins, and killer whales through anecdotal stories of achievement and challenge. Estes ...


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 ...


Importance Of Scale, Land Cover, And Weather On The Abundance Of Bird Species In A Managed Forest, Alexis R. Grinde, Gerald J. Niemi, Brian R. Sturtevant, Hannah Panci, Wayne Thogmartin, Peter Wolter 2017 University of Minnesota - Duluth

Importance Of Scale, Land Cover, And Weather On The Abundance Of Bird Species In A Managed Forest, Alexis R. Grinde, Gerald J. Niemi, Brian R. Sturtevant, Hannah Panci, Wayne Thogmartin, Peter Wolter

Peter Wolter

Climate change and habitat loss are projected to be the two greatest drivers of biodiversity loss over the coming century. While public lands have the potential to increase regional resilience of bird populations to these threats, long-term data are necessary to document species responses to changes in climate and habitat to better understand population vulnerabilities. We used generalized linear mixed models to determine the importance of stand-level characteristics, multi-scale land cover, and annual weather factors to the abundance of 61 bird species over a 20-year time frame in Chippewa National Forest, Minnesota, USA. Of the 61 species modeled, we were ...


Assessing The Potential Of Land Use Modification To Mitigate Ambient No2 And Its Consequences For Respiratory Health, Meenakshi Rao, Linda A. George, Vivek Shandas, Todd N. Rosenstiel 2017 Portland State University

Assessing The Potential Of Land Use Modification To Mitigate Ambient No2 And Its Consequences For Respiratory Health, Meenakshi Rao, Linda A. George, Vivek Shandas, Todd N. Rosenstiel

Todd N. Rosenstiel

Understanding how local land use and land cover (LULC) shapes intra-urban concentrations of atmospheric pollutants—and thus human health—is a key component in designing healthier cities. Here, NO2 is modeled based on spatially dense summer and winter NO2 observations in Portland-Hillsboro-Vancouver (USA), and the spatial variation of NO2 with LULC investigated using random forest, an ensemble data learning technique. The NO2 random forest model, together with BenMAP, is further used to develop a better understanding of the relationship among LULC, ambient NO2 and respiratory health. The impact of land use modifications on ambient NO2, and consequently on respiratory health ...


Quantifying Resilience Of Multiple Ecosystem Services And Biodiversity In A Temperate Forest Landscape, Elena Cantarello, Adrian C. Newton, Phillip A. Martin, Paul M. Evans, Arjan Gosal, Melissa S. Lucash 2017 Bournemouth University

Quantifying Resilience Of Multiple Ecosystem Services And Biodiversity In A Temperate Forest Landscape, Elena Cantarello, Adrian C. Newton, Phillip A. Martin, Paul M. Evans, Arjan Gosal, Melissa S. Lucash

Melissa S. Lucash

Resilience is increasingly being considered as a new paradigm of forest management among scientists, practitioners, and policymakers. However, metrics of resilience to environmental change are lacking. Faced with novel disturbances, forests may be able to sustain existing ecosystem services and biodiversity by exhibiting resilience, or alternatively these attributes may undergo either a linear or nonlinear decline. Here we provide a novel quantitative approach for assessing forest resilience that focuses on three components of resilience, namely resistance, recovery, and net change, using a spatially explicit model of forest dynamics. Under the pulse set scenarios, we explored the resilience of nine ecosystem ...


Disequilibrium Of Fire-Prone Forests Sets The Stage For A Rapid Decline In Conifer Dominance During The 21st Century, Josep M. Serra-Diaz, Charles Maxwell, Melissa S. Lucash, Robert M. Scheller, Danelle M. Laflower, Adam D. Miller, Alan J. Tepley, Howard E. Epstein, Kristina J. Anderson-Teixeira, Jonathan R. Thompson 2017 Harvard University

Disequilibrium Of Fire-Prone Forests Sets The Stage For A Rapid Decline In Conifer Dominance During The 21st Century, Josep M. Serra-Diaz, Charles Maxwell, Melissa S. Lucash, Robert M. Scheller, Danelle M. Laflower, Adam D. Miller, Alan J. Tepley, Howard E. Epstein, Kristina J. Anderson-Teixeira, Jonathan R. Thompson

Melissa S. Lucash

As trees are long-lived organisms, the impacts of climate change on forest communities may not be apparent on the time scale of years to decades. While lagged responses to environmental change are common in forested systems, potential for abrupt transitions under climate change may occur in environments where alternative vegetation states are influenced by disturbances, such as fire. The Klamath mountains (northern California and southwest Oregon, USA) are currently dominated by carbon rich and hyper-diverse temperate conifer forests, but climate change could disrupt the mechanisms promoting forest stability– regeneration and fire tolerance— via shifts in the fire regime in conjunction ...


Development, Energy, And Climate Change Policy: Enabling Sustainable Development Through Access To Energy, Robert J. Brecha 2017 University of Dayton

Development, Energy, And Climate Change Policy: Enabling Sustainable Development Through Access To Energy, Robert J. Brecha

The Social Practice of Human Rights: Charting the Frontiers of Research and Advocacy

Human rights, human development, and climate change clearly overlap in many ways. Development, as quantified by the Human Development Index (HDI), for example, has historically been strongly correlated with energy consumption. This fact is recognized in Sustainable Development Goal (SDG) 7, to “ensure access to affordable, reliable, sustainable and modern energy for all.” Currently the world is in the midst of a large wave of human migration, much of it involuntary and due to stymied development opportunities as well as political upheaval. Climate change will become, or already is, an exacerbating factor in migration dynamics.

A pertinent question is how ...


Democratic Civic Engagement: Transformative Local, Inclusive Decision-Making To Achieve Global Peace And Climate Solutions, Leah Ceperley 2017 University of Dayton

Democratic Civic Engagement: Transformative Local, Inclusive Decision-Making To Achieve Global Peace And Climate Solutions, Leah Ceperley

The Social Practice of Human Rights: Charting the Frontiers of Research and Advocacy

The UN Sustainable Development Goals call for action on Climate (No. 13) and Strengthening Governance (No. 16) as imperative to transform our world toward one that is resilient, just, and peaceful. Climate change is a global problem, marked frequently in the U.S. by indifference, with far-reaching impacts disproportionately burdening the poor and vulnerable worldwide. Global in scope, its sources, impacts, and fields of action are local. Combating indifference at the local level can strengthen local governance structures, build trust across ideological divides, and shift the conversation from indifference to action.

Using an example from a University of Dayton-sponsored National ...


Climate Change, Development, And The Global Commons, Robert J. Brecha 2017 University of Dayton

Climate Change, Development, And The Global Commons, Robert J. Brecha

The Social Practice of Human Rights: Charting the Frontiers of Research and Advocacy

An important link between energy, climate change, human development, and human rights comes in the form of a question that has yet to be answered satisfactorily: The earth’s atmosphere and other physical systems are the ultimate example of the global commons. Do future generations have a human right to an unchanged earth system? Sustainable Development Goals 13, 14, and 15 imply an affirmative answer. Given that climate scientists have a good estimate of the amount of carbon dioxide that can be emitted before the safe uptake capacity of the atmosphere is breached, how do we allocate that remaining atmospheric ...


Encounters With Climate Change: How Sdg 13 Can Move From Awareness To Action, Rebecca C. Potter 2017 University of Dayton

Encounters With Climate Change: How Sdg 13 Can Move From Awareness To Action, Rebecca C. Potter

The Social Practice of Human Rights: Charting the Frontiers of Research and Advocacy

In a well-known passage from his book I and Thou, Martin Buber relates his encounter with a tree: “I contemplate a tree,” he writes, and then lists the various ways he could perceive the tree, as an artist or biologist, as someone interested in the trees parts and construction or interested in its function as a living system. But in all cases, Buber observes, “the tree remains my object and has its place and its time span, its kind and condition.”

Yet sometimes, “if will and grace are conjoined,” Buber describes being drawn into a relation with the tree wherein ...


The Importance Of Regional And Landscape Context And Climate Change To Northern Bobwhite Management, Frank R. Thompson III 2017 U.S. Forest Service

The Importance Of Regional And Landscape Context And Climate Change To Northern Bobwhite Management, Frank R. Thompson Iii

National Quail Symposium Proceedings

Long-term declines in northern bobwhite (Colinus virginianus) in the United States are presumably due to decades of habitat loss or degradation at a national scale. Food and fiber production characterized by replacement of open woodlands and savannas by dense forest, intensification of agriculture, and conversion of native grasslands to nonnative pastures have degraded habitats for most grassland and early successional birds. Declines in bobwhite and associated species occurred within this context at a scale that has overwhelmed wildlife management efforts. However, with understanding of scale and context, managers could sustain these species in some future landscapes. Increasing urbanization over the ...


Breeding Season Space Use And Habitat Selection Of Adult Female Scaled And Gambel's Quail In West Texas, Richard A. Temple, Louis Harveson, Ryan S. Luna 2017 Sul Ross State University

Breeding Season Space Use And Habitat Selection Of Adult Female Scaled And Gambel's Quail In West Texas, Richard A. Temple, Louis Harveson, Ryan S. Luna

National Quail Symposium Proceedings

We used radiotelemetry to investigate breeding-season (1 Apr–1 Sep, 2012 and 2013) home ranges and habitat selection of adult female scaled (Callipepla squamata) and Gambel’s quail (C. gambelii) in the eastern Chihuahuan Desert, Texas. Mean breeding-season home range (95% fixed kernel) for scaled quail was 145.02 ± 23.56 ha (range = 22.03–538.24 ha) and 156.32 ± 13.04 ha (range = 66.15– 270.74 ha) for Gambel’s quail. Mean core-use area (50% fixed kernel) for scaled quail was 31.38 ± 4.80 ha (range = 4.03–111.36 ha) and 32.87 ± 2.61 ...


The Saga Of The Masked Bobwhite: Lessons Learned And Unlearned, David E. Brown, Kevin B. Clark 2017 Arizona State University

The Saga Of The Masked Bobwhite: Lessons Learned And Unlearned, David E. Brown, Kevin B. Clark

National Quail Symposium Proceedings

No bird has generated so much interest and controversy as has the masked bobwhite (Colinus virginianus ridgwayi). From its discovery in 1884 to the present, this gallinaceous game bird has captured the attention of hunter-naturalists, ornithologists, collectors, game breeders, conservationists and bureaucrats. Believed threatened with extinction throughout its 130 year history, the masked bobwhite prompted several collecting expeditions, a survey technique study, a plethora of propagation attempts, and the purchase of an 117,464 acre refuge by the federal government, and expenditures totaling millions of dollars. Yet, despite propagated stock existing in a captive facility on Buenos Aires National Wildlife ...


Conservation Status Of The Masked Bobwhite In Sonora, Mexico, David García-Solórzano, Edgardo López-González, Carlos González-Rebeles Islas 2017 Alianza Mexicana para la Conservación de la Vida Silvestre

Conservation Status Of The Masked Bobwhite In Sonora, Mexico, David García-Solórzano, Edgardo López-González, Carlos González-Rebeles Islas

National Quail Symposium Proceedings

The historical distribution of the endangered masked bobwhite (Colinus virginianus ridgwayi) ranged from southern Arizona, United States, to Central Sonora, Mexico. Research in Sonora the past 30 years focused on the largest known populations, near the town of Benjamin Hill on the El Carrizo ranch. Research and perceptions by local residents pointed to a decline in masked bobwhite over the past decade. We evaluated existence of the subspecies during 2013-15 by searching transects and interviewing local residents. Our evaluation yielded no validated observations of masked bobwhite, and subsequently we call for further coordinated population monitoring and the development of technology ...


Survival And Nesting Ecology Of Scaled Quail In The Trans-Pecos, Texas, Carlos E. Gonzalez Gonzalez, Louis A. Harveson, Ryan S. Luna 2017 Sul Ross State University

Survival And Nesting Ecology Of Scaled Quail In The Trans-Pecos, Texas, Carlos E. Gonzalez Gonzalez, Louis A. Harveson, Ryan S. Luna

National Quail Symposium Proceedings

Scaled quail (Callipepla squamata) are one of the most ecologically and economically important wildlife species in the Trans-Pecos, because they are the primary upland game bird in the Chihuahuan Desert. Using radiotelemetry, we evaluated survival (Kaplan–Meier) and nesting success of quail on 3 study sites in the Trans-Pecos, Texas: one (Santiago Mountain Ranch, central Brewster Co.) was supplemented with milo (Sorghum bicolor) year-round, the second (Lado Ranch, south Culberson Co.) never used supplements, and the third (Apache Ranch, central Culberson Co.) was supplemented with quail blocks. We trapped and radiocollared 164 female quail collectively across all study sites, and ...


Efficacy Of A Soft Release Strategy For Translocating Scaled Quail In The Rolling Plains Of Texas, Rebekah E. Ruzicka, Kara B. Campbell, Michelle C. Downey, Dale Rollins, Bradley Kubečka, Matthew Poole, Donald C. Ruthven 2017 Rolling Plains Quail Research Foundation

Efficacy Of A Soft Release Strategy For Translocating Scaled Quail In The Rolling Plains Of Texas, Rebekah E. Ruzicka, Kara B. Campbell, Michelle C. Downey, Dale Rollins, Bradley Kubečka, Matthew Poole, Donald C. Ruthven

National Quail Symposium Proceedings

Scaled Quail (Callipepla squamata) populations have become locally extinct and spatially fragmented in the Rolling Plains ecoregion of Texas. Translocating Scaled Quail from core to declining populations could augment populations or re-establishing extinct populations. Although translocations of scaled quail have been attempted in Texas, none have been documented and none have attempted to identify best practices. Release strategy (i.e., hard or soft release) is a factor that can influence the success of a translocation. Our objective was to compare daily apparent survival of scaled quail translocated to the Rolling Plains between 2 release treatment groups: hard- and soft-release. We ...


Digital Commons powered by bepress