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Articles 6361 - 6390 of 13451
Full-Text Articles in Entire DC Network
General Catalog 2009-2010, Utah State University
General Catalog 2009-2010, Utah State University
University Catalogs
Contains course descriptions, University college calendar, and college administration
Managing Wild Pigs: A Technical Guide, Ben C. West, Andrea L. Cooper, James B. Armstrong
Managing Wild Pigs: A Technical Guide, Ben C. West, Andrea L. Cooper, James B. Armstrong
Human–Wildlife Interactions Monographs
Wild pigs are and will continue to be a challenging problem for wildlife managers, landowners, farmers, conservationists, and others. Despite ongoing control programs, wild pigs have increased both their range and population size. Because of this growth, wildlife managers will increasingly be involved in dealing with problems caused by wild pigs traditionally, as well as emerging problems such as landscaping damage in suburban areas. Successful management strategies will depend upon persistent, adaptive, and integrated management programs that incorporate sound biological and ecological information. An integrated management approach, in addition to addressing the biological and ecological aspects of wild pigs, will …
Digital Commons Annual Report: Year One 2008-2009, Heather M. Leary
Digital Commons Annual Report: Year One 2008-2009, Heather M. Leary
Digital Commons Reports
This report shows the progress for Utah State University's Digital Commons repository during it's first year, from October 27, 2008 through October 31, 2009.
Voices: On Stage And In Print, 2009, Utah State University Department Of English
Voices: On Stage And In Print, 2009, Utah State University Department Of English
Voices of USU
This collection of student writing represents the voices of over 2,000 students who enroll each academic year in Utah State University’s second-year composition course, Intermediate Writing: Research Writing in a Persuasive Mode. Voices of USU celebrates excellence in writing by providing undergraduate students of diverse backgrounds and disciplines the opportunity to have their work published.
A New Mouse-Adapted Strain Of Sars-Cov As A Lethal Model Forevaluating Antiviral Agents In Vitro And In Vivo, C. W. Day, R. Baric, S. X. Cai, M. Frieman, Y. Kumaki, John D. Morrey, Donald F. Smee, Dale L. Barnard
A New Mouse-Adapted Strain Of Sars-Cov As A Lethal Model Forevaluating Antiviral Agents In Vitro And In Vivo, C. W. Day, R. Baric, S. X. Cai, M. Frieman, Y. Kumaki, John D. Morrey, Donald F. Smee, Dale L. Barnard
Animal, Dairy, and Veterinary Science Faculty Publications
Severe acute respiratory syndrome (SARS) is a highly lethal emerging disease caused by coronavirus SARS-CoV. New lethal animal models for SARS were needed to facilitate antiviral research. We adapted and characterized a new strain of SARS-CoV (strain v2163) that was highly lethal in 5–6 week old BALB/c mice. It had nine mutations affecting 10 amino acid residues. Strain v2163 increased IL-1α, IL-6, MIP-1α, MCP-1, and RANTES in mice, and high IL-6 expression correlated with mortality. The infection largely mimicked human disease, but lung pathology lacked hyaline membrane formation. In vitro efficacy against v2163 was shown with known inhihibitors of SARSCoV …
Animal Models For The Study Of Influenza Pathogenesis And Therapy, Dale L. Barnard
Animal Models For The Study Of Influenza Pathogenesis And Therapy, Dale L. Barnard
Animal, Dairy, and Veterinary Science Faculty Publications
Influenza A viruses causes a variety of illnesses in humans. The most common infection, seasonal influenza, is usually a mild, self-limited febrile syndrome, but it can be more severe in infants, the elderly, and immunodeficient persons, in whom it can progress to severe viral pneumonitis or be complicated by bacterial superinfection, leading to pneumonia and sepsis. Seasonal influenza also occasionally results in neurologic complications. Rarely, viruses that have spread from wild birds to domestic poultry can infect humans; such “avian influenza” can range in severity from mild conjunctivitis through the rapidly lethal disease seen in persons infected with the H5N1 …
A Recombinant,Infectious Human Parainfluenza Virus Type 3 Expressing The Enhanced Green Fluorescentprotein For Use In High-Throughput Antiviral Assays, J. P. Roth, J. K. Li, Donald F. Smee, John D. Morrey, Dale L. Barnard
A Recombinant,Infectious Human Parainfluenza Virus Type 3 Expressing The Enhanced Green Fluorescentprotein For Use In High-Throughput Antiviral Assays, J. P. Roth, J. K. Li, Donald F. Smee, John D. Morrey, Dale L. Barnard
Animal, Dairy, and Veterinary Science Faculty Publications
The ability to rescue an infectious, recombinant, negative-stranded, RNA virus from a cDNA clone, has led to new opportunities for measuring viral replication from a viral expressed reporter gene. In this study, the enhanced green fluorescent protein (EGFP) gene was inserted into the human parainfluenza virus type 3 (HPIV-3) antigenome and a recombinant, infectious virus was rescued. Maximum EGFP expression levels, measured by fluorescence, were seen at day 3. Comparison of a three-day, viral expressed EGFP fluorescence assay to a seven-day, neutral red assay, based on complete cell destruction in virus infected MA-104 cells, yielded Z′-factor values of 0.83 and …
Heraclio Bernal: Bandit Citizen, Amy Robinson
Heraclio Bernal: Bandit Citizen, Amy Robinson
Decimonónica
Shortly after Heraclio Bernal’s much awaited defeat to federal forces in 1888, the Governor of Sinaloa, Francisco Cañedo, referred to the state’s famous outlaw as “el bandido ciudadano” (El Nacional, 10 Jan. 1888).1 The Mexico City newspaper El Nacional promptly registered their disapproval:
Saline Lakes Around The World : Unique Systems With Unique Values, 10th Isslr Conference And 2008 Friends Of Great Salt Lake Forum, May 11-16, 2008, University Of Utah, Salt Lake City, Aharon Oren, David L. Naftz, Patsy Palacios, Wayne A. Wurtsbaugh
Saline Lakes Around The World : Unique Systems With Unique Values, 10th Isslr Conference And 2008 Friends Of Great Salt Lake Forum, May 11-16, 2008, University Of Utah, Salt Lake City, Aharon Oren, David L. Naftz, Patsy Palacios, Wayne A. Wurtsbaugh
Natural Resources and Environmental Issues
No abstract provided.
Algal And Cyanobacterial Saline Biofilms Of The Grande Coastal Lagoon, Lima, Peru, Haydee Montoya
Algal And Cyanobacterial Saline Biofilms Of The Grande Coastal Lagoon, Lima, Peru, Haydee Montoya
Natural Resources and Environmental Issues
Tropical coastal wetland ecosystems are widely distributed in arid regions. The Grande coastal lagoon in Peru's central plain is shallow, eutrophic and alkaline, exposed to the annual hydrological regime with flooding and desiccation periods, when a salt crust is formed. The brackish to hypersaline habitats showed salinity gradients from 2-90 ppt (NaCl) to saturation, pH values from 7.0 to 10.5, temperatures from 18 to 31 C, phosphate concentrations from 0.5 to 50 mg 1-1. Dominance of halophilic biofilms of benthic cyanobacteria followed by diatoms and the submerged macrohpytes Chara hornemannii and Ruppia maritima during the clear water state supported the …
Long-Term Mesocosm Simulation Of Algal And Archaeal Blooms In The Dead Sea Following Dilution With Red Sea Water, Aharon Oren, Jonha Gavrieli, Marco Kohen, Joseph Lati, Mordehay Aharoni, Ittai Gavrieli
Long-Term Mesocosm Simulation Of Algal And Archaeal Blooms In The Dead Sea Following Dilution With Red Sea Water, Aharon Oren, Jonha Gavrieli, Marco Kohen, Joseph Lati, Mordehay Aharoni, Ittai Gavrieli
Natural Resources and Environmental Issues
To understand the factors that determine the extent of blooms of the unicellular green alga Dunaliella and halophilic Archaea in the Dead Sea, and to predict the possible effects of the planned conveyance of Red Sea water to the Dead Sea, we performed simulation experiments in the 0.9 m3 outdoor mesocosms on the grounds of the Dead Sea Works Ltd. at Sedom, as well as in the laboratory. The laboratory simulations showed that development of the Dunaliella was possible only when Dead Sea water (340 g 1-1 total dissolved salts) was diluted with minimally 10% (by volume) of Red Sea …
Biodiversity Of Inland Saltscapes Of The Iberian Peninsula, Katia Hueso Kortekaas, Jesus-F. Carrasco Vaya
Biodiversity Of Inland Saltscapes Of The Iberian Peninsula, Katia Hueso Kortekaas, Jesus-F. Carrasco Vaya
Natural Resources and Environmental Issues
The Iberian Peninsula hosts a wide variety of inland saltscapes, from man-made solar evaporation salterns to hyper-saline lakes and salt rivers, most of them unknown to other European countries. The present contribution deals with this diversity of saltscapes, briefly introduces their main features and locations, and presents a general overview of their conservation status. Some of their natural values are not even well understood by the scientists themselves, and therefore they are very rare and fragile and in need of protection. However, many of these natural saltscapes have been and are currently under threat, having been desiccated, used as waste …
Aral Sea: Water Level, Salinity And Long-Term Changes In Biological Communities Of An Endangered Ecosystem-Past, Present And Future, Nickolay V. Aladin, Igor S. Plotnikov, Philip Micklin, Thomas Ballatore
Aral Sea: Water Level, Salinity And Long-Term Changes In Biological Communities Of An Endangered Ecosystem-Past, Present And Future, Nickolay V. Aladin, Igor S. Plotnikov, Philip Micklin, Thomas Ballatore
Natural Resources and Environmental Issues
The Aral Sea, which before 1960 was the fourth largest lake in the world, has now split into four separate water bodies. This break-up and desiccation mainly resulted from upstream irrigation withdrawals from the two main influent rivers, the Syr Darya and and Amu Darya. The negative effects on the lake ecosystem due to declining water level and increasing salinity, as well as the profound socioeconomic and human impacts to the riparian populations, have been well documented. This paper focuses on the conservation and rehabilitation efforts for four remaining key water bodies of the Aral Sea: the Northern (Small) Aral …
Study Of The Saline Lakes Of The Esperance Hinterland, Western Australia, With Special Reference To The Roles Of Acidity And Episodicity, Brian V. Timms
Study Of The Saline Lakes Of The Esperance Hinterland, Western Australia, With Special Reference To The Roles Of Acidity And Episodicity, Brian V. Timms
Natural Resources and Environmental Issues
Most saline lakes are alkaline, but acid ground waters in some southern areas in Western Australia cause some to have pHs as low as 3. Their fauna is severely restricted to an endemic brine shrimp (Paratemia sp.), a copepod Calamoecia trilobata, and two species of ostracods, including Australocypris bennetti. Nearby alkaline salt lakes show an attenuating fauna with increasing salinity with dominance by various crustaceans particularly Paratemia spp., various ostracods, copepods, Daphnia (Daphniopsis) truncata, Haloniscus searlei and snails including Coxiella glauerti, as is typical in salinas in southern Australia. When both types of lakes fill with episodic rain, their salinity …
Oxygen Production And Use In Benthic Mats Of Solar Salt Ponds, Mark U. Coleman
Oxygen Production And Use In Benthic Mats Of Solar Salt Ponds, Mark U. Coleman
Natural Resources and Environmental Issues
The benthic mat in the ponds of solar salt producers is important because as a beneficial effect, the mat reduces loss of brine from the field but it unfortunately also supports species which can have a serious detrimental effect on the halite crystallization process. Anaerobic and aerobic activity of the mat which is thought to be a significant factor in the management of the salt field is not quantified by traditional monitoring methods. A method of measuring the generation of oxygen from benthic algal mats, tested in the north west of Western Australia at three solar salt fields has been …
Microbial Communities In Salt Lakes: Phylogenetic Diversity, Metabolic Diversity, And In Situ Activities, Aharon Oren, Bonnie K. Baxter, Bart C. Weimer
Microbial Communities In Salt Lakes: Phylogenetic Diversity, Metabolic Diversity, And In Situ Activities, Aharon Oren, Bonnie K. Baxter, Bart C. Weimer
Natural Resources and Environmental Issues
A roundtable discussion was held on Monday, 12 May 2008, following the sessions on 'Microorganisms in Hypersaline Environments' at the 10th Conference on Salt Lake Research & 2008 FRIENDS of Great Salt Lake Issues Forum, University of Utah, Salt Lake City. Among the aspects discussed were: 1. The gap between our knowledge of the microorganisms isolated in culture and the true microbial diversity as apparent when using culture-independent techniques, in most cases based on the characterization of small subunit ribosomal RNA genes; 2. The metabolic diversity of the microorganisms inhabiting saline and hypersaline lakes and the lack of information to …
Journal Of Mormon History Vol. 35, No. 2, 2009
Journal Of Mormon History Vol. 35, No. 2, 2009
Journal of Mormon History
TANNER LECTURE
--Letting Go: Understanding Mormon Growth in Africa Philip Jenkins, 1
ARTICLES
--California Provided the Answer John K. Carmack, 27
--The RLDS Church on the Pacific Slope Ronald E. Romig, 43
--The Tragic Matter of Louie Wells and John Q. Cannon Kenneth L. Cannon II, 126
--Handcarts Going East: The 1857 Missionaries Karen Ann Griggs, 191
REVIEWS
--Ronald W. Walker, Richard E. Turley Jr., and Glen M. Leonard. Massacre at Mountain Meadows: An American Tragedy Edward Leo Lyman, 238
-Lola Van Wagenen, Sister-Wives and Suffragists: Polygamy and the Politics of Woman Suffrage, 1870–1896 Andrea G. Radke-Moss, 245
--Matthew C. …
Arqueologias Americanas. La Representación Del Mundo Antiguo Mexicano Y El Debate Estético En El Contexto Europeo De La Primera Mitad Del Siglo Xix, Antonio E. De Pedro Robles
Arqueologias Americanas. La Representación Del Mundo Antiguo Mexicano Y El Debate Estético En El Contexto Europeo De La Primera Mitad Del Siglo Xix, Antonio E. De Pedro Robles
Decimonónica
En el año de 1834, en plena década en la que Francia se esforzaba por convertirse en el centro hegemónico de la cultural mundial, el estudio de las antigüedades mexicanas lograba despertar el interés de la ciencia y la cultura francesa, sentando las bases del futuro “Americanismo.” Charles Farcy, destacado miembro de Société Royal des Antiquaires de France, del Institut Historique y de la Société libre des Meaux-Arts de Paris, señalaba, en el Discours Preliminaire de la edición de la obra La Real Expedición Anticuaria de México (1805-1808), volumen 2, editado en París en 1834 por Henry …
It Is The East And Zulima Is The Sin: Shifting Representations Of Muslim Spain In Hartzenbusch’S Los Amantes De Teruel, Christine L. Blackshaw
It Is The East And Zulima Is The Sin: Shifting Representations Of Muslim Spain In Hartzenbusch’S Los Amantes De Teruel, Christine L. Blackshaw
Decimonónica
While Los amantes de Teruel was not Juan Eugenio Hartzenbusch’s most widely-performed drama during his lifetime, it is, nonetheless, the one for which he is best remembered today. From its first performance on January 19, 1837, many sensed that the play would become part of the Spanish literary canon, as is evidenced by the praise from the critic for the Semanario Pintoresco Español, who boldly proclaimed, “el Señor Hartzenbusch se ha colocado en este punto a la altura de los grandes modelos, y en casi todo el drama parece revelar un alma del temple de Rojas y Calderones” (5 …
Los Ecos Del Primer Canto. El Diario De Viajes De Lucio V. Mansilla Y Las Relaciones Intertextuales Con Su Obra Posterior, Ma. Laura Pérez Gras
Los Ecos Del Primer Canto. El Diario De Viajes De Lucio V. Mansilla Y Las Relaciones Intertextuales Con Su Obra Posterior, Ma. Laura Pérez Gras
Decimonónica
El hallazgo del diario de viajes—presuntamente extraviado—de Lucio Victorio Mansilla, olvidado entre los papeles familiares de uno de sus herederos, es una novedad en el mundo de las letras.1 En este momento, se encuentra en ciernes una edición crítica del diario, a cargo de un equipo de investigación, del que formo parte, bajo la dirección de la Dra. María Rosa Lojo.2
Limnological Analyses Of Cutler Reservoir And Dingle Marsh With Respect To Eutrophication, J. D. Abbott, Deb Collins, Colin Cook, Dan Lamarra, Ryan Leonard, Ben Marret, Justin Stout, Gilbert Rowley, Jeremy Rowley, Wayne A. Wurtsbaugh
Limnological Analyses Of Cutler Reservoir And Dingle Marsh With Respect To Eutrophication, J. D. Abbott, Deb Collins, Colin Cook, Dan Lamarra, Ryan Leonard, Ben Marret, Justin Stout, Gilbert Rowley, Jeremy Rowley, Wayne A. Wurtsbaugh
Watershed Sciences Faculty Publications
Cutler Reservoir is located in Cache county, Utah and was created for the purposes of irrigation, water storage and flood control. High nutrient loading to Cutler has raised concerns about the health of this system and has resulted in it being listed on the state's 303(d) list of impaired waters. The TMDL plan being drafted for Cutler lists dissolved oxygen and phosphorous as the key issues of concern. The underlying problem created by nutrient loading is eutrophication. If Cutler is to remain as a valuable source of recreation, wildlife habitat, and water for the Cache Valley we must understand the …
Resources - Thinking Small: Nano Small, David Stricker
Resources - Thinking Small: Nano Small, David Stricker
Publications
The article provides information on the "Nanooze" magazine publication. It notes the significance of nanotechnology to the development of latest innovations that come from materials at smallest dimensions or at the nanoscale levels. It presents resources published within the publication that explore the emerging issues in nanotechnology.
An Introduction To The Biocomplexity Of Sanak Island, Western Gulf Alaska, Hd G. Maschner, M Betts, J Cornell, B Finney, J A. Dunne, Nancy J. Huntly, J W. Jordan, N Misarti, K L. Reedy-Maschner, R Russell
An Introduction To The Biocomplexity Of Sanak Island, Western Gulf Alaska, Hd G. Maschner, M Betts, J Cornell, B Finney, J A. Dunne, Nancy J. Huntly, J W. Jordan, N Misarti, K L. Reedy-Maschner, R Russell
Biology Faculty Publications
The Sanak Biocomplexity Project is a transdisciplinary research effort focused on a small island archipelago 50 km south of the Alaska Peninsula in the western Gulf of Alaska. This team of archaeologists, terrestrial ecologists, social anthropologists, intertidal ecologists, geologists, oceanographers, paleoecologists, and modelers is seeking to understanding the role of the ancient, historic, and modern Aleut in the structure and functioning of local and regional ecosystems. Using techniques ranging from systematic surveys to stable isotope chemistry, long-term shifts in social dynamics and ecosystem structure are present in the context of changing climatic regimes and human impacts. This paper presents a …
Invasive Litter, Not An Invasive Insectivore, Determines Invertebrate Communities In Hawaiian Forests, N. C. Tuttle, Karen H. Beard, W. C. Pitt
Invasive Litter, Not An Invasive Insectivore, Determines Invertebrate Communities In Hawaiian Forests, N. C. Tuttle, Karen H. Beard, W. C. Pitt
Wildland Resources Faculty Publications
In Hawaii, invasive plants have the ability to alter litter-based food chains because they often have litter traits that differ from native species. Additionally, abundant invasive predators, especially those representing new trophic levels, can reduce prey. The relative importance of these two processes on the litter invertebrate community in Hawaii is important, because they could affect the large number of endemic and endangered invertebrates. We determined the relative importance of litter resources, represented by leaf litter of two trees, an invasive nitrogen-fixer, Falcataria moluccana, and a native tree, Metrosideros polymorpha, and predation of an invasive terrestrial frog, Eleutherodactylus coqui, on …
Aspen Succession And Nitrogen Loading: A Case For Epiphytic Lichens As Bioindicators In The Rocky Mountains, Usa, Paul C. Rogers, Kori D. Moore, Ronald J. Ryel
Aspen Succession And Nitrogen Loading: A Case For Epiphytic Lichens As Bioindicators In The Rocky Mountains, Usa, Paul C. Rogers, Kori D. Moore, Ronald J. Ryel
Wildland Resources Faculty Publications
Question: Can lichen communities be used to assess shortand long-term factors affecting seral quaking aspen (Populus tremuloides) communities at the landscape scale? Location: Bear River Range, within the Rocky Mountains, in northern Utah and southern Idaho, USA. Method: Forty-seven randomly selected mid-elevation aspen stands were sampled for lichens and stand conditions. Plots were characterized according to tree species cover, basal area, stand age, bole scarring, tree damage, and presence of lichen species. We also recorded ammonia emissions with passive sensors at 25 urban and agricultural sites throughout an adjacent populated valley upwind of the forest stands. Nonmetric multidimensional scaling (NMS) …
Wild Horse Gathering For The Red Desert Complex Wild Horse Herd Management Areas (Lost Creek, Stewart Creek, Green Mountain, Crooks Mountain, Antelope Hills), United States Department Of The Interior, Bureau Of Land Management
Wild Horse Gathering For The Red Desert Complex Wild Horse Herd Management Areas (Lost Creek, Stewart Creek, Green Mountain, Crooks Mountain, Antelope Hills), United States Department Of The Interior, Bureau Of Land Management
Environmental Assessments (WY)
This Environmental Assessment (EA) has been prepared to disclose and analyze the environmental consequences of gathering excess wild horses in the Red Desert Wild Horse Herd Management Area (HMA) Complex. The HMAs included in this complex are Lost Creek, Stewart Creek, Green Mountain, Crooks Mountain and Antelope Hills. The EA is a site-specific analysis of potential impacts that could result with the implementation of a proposed action or alternatives to the proposed action. The EA assists the BLM in project planning and ensuring compliance with the National Environmental Policy Act (NEPA), and in making a determination as to whether any …
Global Chloroplast Phylogeny And Biogeography Of Bracken (Pteridium: Dennstaedtiaceae), Joshua P. Der, J. A. Thomson, J. K. Stratford, Paul G. Wolf
Global Chloroplast Phylogeny And Biogeography Of Bracken (Pteridium: Dennstaedtiaceae), Joshua P. Der, J. A. Thomson, J. K. Stratford, Paul G. Wolf
Biology Faculty Publications
Bracken ferns (genus Pteridium ) represent an ancient species complex with a natural worldwide distribution. Pteridium has historically been treated as comprising a single species, but recent treatments have recognized several related species. Phenotypic plasticity, geographically structured morphological variation, and geographically biased sampling have all contributed to taxonomic confusion in the genus. We sampled bracken specimens worldwide and used variable regions of the chloroplast genome to investigate phylogeography and reticulate evolution within the genus. Our results distinguish two major clades within Pteridium , a primarily northern hemisphere Laurasian/African clade, which includes all taxa currently assigned to P. aquilinum , and …
Evaluating The Effectiveness Of Grassbed Treatments As Habitat For Juvenile Black Bass In A Drawdown Reservoir, D. R. Ratcliff, Wayne A. Wurtsbaugh, J. Zustak
Evaluating The Effectiveness Of Grassbed Treatments As Habitat For Juvenile Black Bass In A Drawdown Reservoir, D. R. Ratcliff, Wayne A. Wurtsbaugh, J. Zustak
Watershed Sciences Faculty Publications
Many reservoirs in arid regions experience highly variable water levels caused by seasonal inflow fluctuations and designated outflow requirements. At Shasta Lake, California, managers plant cereal-grain grassbeds on exposed drawdown shorelines to increase juvenile fish habitat, localize productivity, and increase invertebrate fish prey. To determine the efficacy of these plantings, the abundance of juvenile black basses Micropterus spp. (20–55 mm standard length) and the amount of periphyton and macroinvertebrate prey were compared among three treatment types: (1) planted grassbeds of cereal barley Hordeum vulgare; (2) artificial rope grassbeds, which eliminated physical deterioration and nutrient release; and (3) nonplanted control sites …
Assessing Aspen Using Remote Sensing, Randy Hamilton, Kevin Megown, Jeff Dibenedetto, Dale Bartos, Anne Mikeck
Assessing Aspen Using Remote Sensing, Randy Hamilton, Kevin Megown, Jeff Dibenedetto, Dale Bartos, Anne Mikeck
Aspen Bibliography
Large areas of aspen (Populus tremuloides) have disappeared and continue to disappear from western forests due to successional decline and sudden aspen decline (SAD). This loss of aspen ecosystems negatively impacts watersheds, wildlife, plants, and recreation. Much can still be done to restore aspen if timely and appropriate action is taken. However, land managers often lack fundamental information on the location, quantity, and status of aspen stands. This information is needed to plan, implement, and defend aspen restoration activities, but it is often difficult and costly to obtain. Advances in remote sensing technologies can provide cost-effective ways to obtain spatial …
Changes In A Tropical Forest Support Metabolic Zero-Sum Dynamics, S.K. Morgan Ernest, Ethan P. White, J. H. Brown
Changes In A Tropical Forest Support Metabolic Zero-Sum Dynamics, S.K. Morgan Ernest, Ethan P. White, J. H. Brown
Biology Faculty Publications
Major shifts in many ecosystem-level properties of tropical forests have been observed, but the processes driving these changes are poorly understood. Over the past two decades, the forest on Barro Colorado Island, Panama (BCI) exhibited a 20% decrease in the number of trees and a 10% increase in average tree diameter. Here we show that these changes are consistent with a zero-sum constraint operating in this forest. Zero-sum constraints result when the total resource use of an ecosystem is limited by available resources. This causes increases in resource use by some groups of organisms to be compensated for by decreases …