Index Catalog // ScholarsArchive@OSU

A Landsat time series approach to characterize bark beetle and defoliator impacts on tree mortality and surface fuels in conifer forests

Creator:: Meigs, Garrett W., Kennedy, Robert E., and Cohen, Warren B.
Abstract:: Insects are important forest disturbance agents, and mapping their effects on tree mortality and surface fuels represents a critical research challenge. Although various remote sensing approaches have been developed to monitor insect impacts, most studies have focused on single insect agents or single locations and have not related observed changes...
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Full Text:: ,⁎, Robert E. Kennedy a, Warren B. Cohen b a Department of Forest Ecosystems and Society, Oregon State

Decadal Trends in Net Ecosystem Production and Net Ecosystem Carbon Balance for a Regional Socioecological System

Creator:: Turner, David P., Ritts, William D., Yang, Zhiqiang, Kennedy, Robert E., Cohen, Warren B., Duane, Maureen V., Thornton, Peter E., and Law, Beverly E.
Abstract:: Carbon sequestration is increasingly recognized as an ecosystem service, and forest management has a large potential to alter regional carbon fluxes − notably by way of harvest removals and related impacts on net ecosystem production (NEP). In the Pacific Northwest region of the U.S., the implementation of the Northwest Forest...
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Full Text:: Ecosystem and Net Ecosystem Carbon Balance for a Regional Socioecological System Forest Ecology

United States Forest Disturbance Trends Observed Using Landsat Time Series

Creator:: Masek, Jeffrey G., Goward, Samuel N., Kennedy, Robert E., Cohen, Warren B., Moisen, Gretchen G., Schleeweis, Karen, and Huang, Chengquan
Abstract:: Disturbance events strongly affect the composition, structure, and function of forest ecosystems; however, existing US land management inventories were not designed to monitor disturbance. To begin addressing this gap, the North American Forest Dynamics (NAFD) project has examined a geographic sample of 50 Landsat satellite image time series to assess...
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Full Text:: Using Landsat Time Series Jeffrey G. Masek,1* Samuel N. Goward,2 Robert E. Kennedy,3,4 Warren B. Cohen

Regional dynamics of forest canopy change and underlying causal processes in the contiguous U.S.

Creator:: Schleeweis, Karen, Goward, Samuel N., Huang, Chengquan, Masek, Jeffrey G., Moisen, Gretchen, Kennedy, Robert E., and Thomas, Nancy E.
Abstract:: The history of forest change processes is written into forest age and distribution and affects earth systems at many scales. No one data set has been able to capture the full forest disturbance and land use record through time, so in this study, we combined multiple lines of evidence to...
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Full Text:: Chengquan Huang,2 Jeffrey G. Masek,3 Gretchen Moisen,1 Robert E. Kennedy,4,5 and Nancy E. Thomas6,2

Comparison and assessment of coarse resolution land cover maps for Northern Eurasia

Creator:: Pflugmacher, Dirk, Krankina, Olga N., Cohen, Warren B., Friedl, Mark A., Sulla-Menashe, Damien, Kennedy, Robert E., Nelson, Peder, Loboda, Tatiana V., Kuemmerle, Tobias, Dyukarev, Egor, Elsakov, Vladimir, and Kharuk, Viacheslav I.
Abstract:: Information on land cover at global and continental scales is critical for addressing a range of ecological, socioeconomic and policy questions. Global land cover maps have evolved rapidly in the last decade, but efforts to evaluate map uncertainties have been limited, especially in remote areas like Northern Eurasia. Northern Eurasia...
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Full Text:: . Krankina a, Warren B. Cohen b, Mark A. Friedl c, Damien Sulla-Menashe c, Robert E. Kennedy a, Peder Nelson

Cryptolepiota, a new sequestrate genus in the Agaricaceae with evidence for adaptive radiation in western North America

Creator:: Kropp, Bradley R., Albee-Scott, Steve, Castellano, Michael A., and Trappe, James M.
Abstract:: Phylogenetic analyses based on nLSU and ITS sequence data indicate that the sequestrate genus Gigasperma is polyphyletic. Gigasperma cryptica, which is known only from New Zealand, has affinities with the Cortinariaceae whereas G. americanum and two additional undescribed taxa from western North America are derived from Lepiota within the Agaricaceae....
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Full Text:: untitled Cryptolepiota, a new sequestrate genus in the

Uncertainty analysis: an evaluation metric for synthesis science

Creator:: Harmon, Mark E., Fasth, Becky, Halpern, Charles B., and Lutz, James A.
Abstract:: The methods for conducting reductionist ecological science are well known and widely used. In contrast, those used in the synthesis of ecological science (i.e., synthesis science) are still being developed, vary widely, and often lack the rigor of reductionist approaches. This is unfortunate because the synthesis of ecological parts into...
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Full Text:: ,1 CHARLES B. HALPERN,2 AND JAMES A. LUTZ3 1Department of Forest Ecosystems and Society, Oregon

Conditions favouring Bromus tectorum dominance of endangered sagebrush steppe ecosystems

Creator:: Reisner, Michael D., Grace, James B., Pyke, David A., and Doescher, Paul S.
Abstract:: 1. Ecosystem invasibility is determined by combinations of environmental variables, invader attributes, disturbance regimes, competitive abilities of resident species and evolutionary history between residents and disturbance regimes. Understanding the relative importance of each factor is critical to limiting future invasions and restoring ecosystems. 2. We investigated factors potentially controlling Bromus...
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Full Text:: dominance of endangered sagebrush steppe ecosystems Michael D. Reisner1*,†, James B. Grace2, David A. Pyke3

The enigmatic truffle Fevansia aurantiaca is an ectomycorrhizal member of the Albatrellus lineage

Creator:: Smith, Matthew E., Schell, Karlee J., Castellano, Michael A., Trappe, Matthew J., and Trappe, James M.
Abstract:: Fevansia aurantiaca is an orange-colored truffle that has been collected infrequently in the Pacific Northwest of the USA. This sequestrate, hypogeous fungus was originally thought to be related to the genera Rhizopogon or Alpova in the Boletales, but the large, inflated cells in the trama and the very pale spore...
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Full Text:: ectomycorrhizal member of the Albatrellus lineage Matthew E. Smith & Karlee J. Schell & Michael A. Castellano

Ecological effects of alternative fuel-reduction treatments: highlights of the National Fire and Fire Surrogate study (FFS)

Creator:: McIver, James D., Stephens, Scott L., Agee, James K., Barbour, Jamie, Boerner, Ralph E. J., Edminster, Carl B., Erickson, Karen L., Farris, Kerry L., Fettig, Christopher J., Fiedler, Carl E., Haase, Sally, Hart, Stephen C., Keeley, Jon E., Knapp, Eric E., Lehmkuhl, John F., Moghaddas, Jason J., Otrosina, William, Outcalt, Kenneth W., Schwilk, Dylan W., Skinner, Carl N., Waldrop, Thomas A., Weatherspoon, C. Phillip, Yaussy, Daniel A., Youngblood, Andrew, and Zack, Steve
Abstract:: The 12-site National Fire and Fire Surrogate study (FFS) was a multivariate experiment that evaluated ecological consequences of alternative fuel-reduction treatments in seasonally dry forests of the US. Each site was a replicated experiment with a common design that compared an un-manipulated control, prescribed fire, mechanical and mechanical + fire...
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Full Text:: alternative fuel-reduction treatments: highlights of theNational Fire and Fire Surrogate study (FFS) James D

The Roles of Large Top Predators in Coastal Ecosystems: New Insights from long Term Ecological Research

Creator:: Rosenblatt, Adam E., Heithaus, Michael R., Mather, Martha E., Matich, Philip, Nifong, James C., Ripple, William J., and Silliman, Brian R.
Abstract:: Abstract: During recent human history, human activities such as overhunting and habitat destruction have severely impacted many large top predator populations around the world. Studies from a variety of ecosystems show that loss or diminishment of top predator populations can have serious consequences for population and community dynamics and ecosystem...
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Full Text:: Florida International University, North Miami, FL, USA. James C. Nifong is a graduate student at the

New North American truffles (Tuber spp.) and their ectomycorrhizal associations

Creator:: Guevara, Gonzalo, Bonito, Gregory, Trappe, James M., Cazares, Efren, Williams, Gwendolyn, Healy, Rosanne A., Schadt, Christopher, and Vilgalys, Rytas
Abstract:: Recent surveys of belowground fungal biodiversity in Mexico and USA have revealed many undescribed truffle species, including many in the genus Tuber. Here we describe seven new species: Tuber beyerlei, T. castilloi, T. guevarai, T. lauryi, T. mexiusanum, T. miquihuanense and T. walkeri. Phylogenetic analyses place these species within the...
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Full Text:: , Durham, North Carolina 27708 James M. Trappe Efren Cázares Department of Forest Ecosystems and Society

Regional variation in stand structure and development in forests of Oregon, Washington, and inland Northern California

Creator:: Reilly, Matthew J. and Spies, Thomas A.
Abstract:: Despite its importance to biodiversity and ecosystem function, patterns and drivers of regional scale variation in forest structure and development are poorly understood. We characterize structural variation, create a hierarchical classification of forest structure, and develop an empirically based framework for conceptualizing structural development from 11,091 plots across 25 million...
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Full Text:: development in forests of Oregon, Washington, and inland Northern California Reilly, M. J., & Spies, T. A

Adapting to Climate Change on Western Public Lands: Addressing the Ecological Effects of Domestic, Wild, and Feral Ungulates

Creator:: Beschta, Robert L., Donahue, Deborah L., DellaSala, Dominick A., Rhodes, Jonathan J., Karr, James R., O'Brien, Mary H., Fleischner, Thomas L., and Deacon-Williams, Cindy
Abstract:: Climate change affects public land ecosystems and services throughout the American West and these effects are projected to intensify. Even if greenhouse gas emissions are reduced, adaptation strategies for public lands are needed to reduce anthropogenic stressors of terrestrial and aquatic ecosystems and to help native species and ecosystems survive...
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Full Text:: , and Feral Ungulates Robert L. Beschta, Debra L. Donahue, Dominick A. DellaSala, Jonathan J

A simple tool for estimating throughfall nitrogen deposition in forests of western North America using lichens

Creator:: Root, Heather T., Geiser, Linda H., Fenn, Mark E., Jovan, Sarah, Hutten, Martin A., Ahuja, Suraj, Dillman, Karen, Schirokauer, David, Berryman, Shanti, and McMurray, Jill A.
Abstract:: Anthropogenic nitrogen (N) deposition has had substantial impacts on forests of North America. Managers seek to monitor deposition to identify areas of concern and establish critical loads, which define the amount of deposition that can be tolerated by ecosystems without causing substantial harm. We present a new monitoring approach that...
Resource Type:: Article
Full Text:: A simple tool

Historical Biogeography and Diversification of Truffles in the Tuberaceae and Their Newly Identified Southern Hemisphere Sister Lineage

Creator:: Bonito, Gregory, Smith, Matthew E., Nowak, Michael, Healy, Rosanne A., Guevara, Gonzalo, Cazares, Efren, Kinoshita, Akihiko, Nouhra, Eduardo R., Domınguez, Laura S., Tedersoo, Leho, Murat, Claude, Wang, Yun, Arroyo Moreno, Baldomero, Pfister, Donald H., Nara, Kazuhide, Zambonelli, Alessandra, Trappe, James M., and Vilgalys, Rytas
Abstract:: Truffles have evolved from epigeous (aboveground) ancestors in nearly every major lineage of fleshy fungi. Because accelerated rates of morphological evolution accompany the transition to the truffle form, closely related epigeous ancestors remain unknown for most truffle lineages. This is the case for the quintessential truffle genus Tuber, which includes...
Resource Type:: Article
Full Text:: Bonito1*, Matthew E. Smith14, Michael Nowak13, Rosanne A. Healy2, Gonzalo Guevara3, Efren Cázares4

Calculating CO2 and H2O eddy covariance fluxes from an enclosed gas analyzer using an instantaneous mixing ratio

Creator:: Burba, George, Schmidt, Andres, Scott, Russell L., Nakai, Taro, Kathilankal, James, Fratini, Gerardo, Hanson, Chad, Law, Beverly, McDermitt, Dayle K., Eckles, Robert, Furtaw, Michael, and Velgersdyk, Michael
Abstract:: Eddy covariance flux research has relied on open- or closed-path gas analyzers for producing estimates of net ecosystem exchange of carbon dioxide (CO₂) and water vapor (H₂O). The two instruments have had different challenges that have led to development of an enclosed design that is intended to maximize strengths and...
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Full Text:: requirements, and can be used in a very low power configura- tion. Another important feature of such a design

Recovering lost ground: Effects of soil burn intensity on nutrients and ectomycorrhiza communities of ponderosa pine seedlings

Creator:: Cowan, Ariel D., Smith, Jane E., and Fitzgerald, Stephen A.
Abstract:: Fuel accumulation and climate shifts are predicted to increase the frequency of high-severity fires in pon-derosa pine (Pinus ponderosa) forests of central Oregon. The combustion of fuels containing large downedwood can result in intense soil heating, alteration of soil properties, and mortality of microbes. Previousstudies show ectomycorrhizal fungi (EMF) improve...
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Full Text:: @fed.fs.us (J.E. Smith). Ariel D. Cowan a, Jane E. Smith b,⇑, Stephen A. Fitzgerald c aDepartment of Forest

Post-fire tree establishment and early cohort development in conifer forests of the western Cascades of Oregon, USA

Creator:: Tepley, Alan J., Swanson, Frederick J., and Spies, Thomas A.
Abstract:: Early‐seral ecosystems make important contributions to regional biodiversity by supporting high abundance and diversity of many plant and animal species that are otherwise rare or absent from closed‐canopy forests. Therefore, the period of post‐fire tree establishment is a key stage in forest stand and ecosystem development that can be viewed...
Resource Type:: Article
Full Text:: development in conifer forests of the western Cascades of Oregon, USA Tepley, A. J., Swanson, F. J., & Spies

Do Ray Cells Provide a Pathway for Radial Water Movement in the Stems of Conifer Trees?

Creator:: Barnard, David M., Lachenbruch, Barbara, McCulloh, Katherine A., Kitin, Peter, and Meinzer, Frederick C.
Abstract:: • Premise of the study: The pathway of radial water movement in tree stems presents an unknown with respect to whole-tree hydraulics. Radial profi les have shown substantial axial sap fl ow in deeper layers of sapwood (that may lack direct connection to transpiring leaves), which suggests the existence of...
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Full Text:: simple tools. Taunton Press, Newtown, Connecticut, USA. JAMES , S. A. , F. C

ScholarsArchive@OSU

A Landsat time series approach to characterize bark beetle and defoliator impacts on tree mortality and surface fuels in conifer forests

Decadal Trends in Net Ecosystem Production and Net Ecosystem Carbon Balance for a Regional Socioecological System

United States Forest Disturbance Trends Observed Using Landsat Time Series

Regional dynamics of forest canopy change and underlying causal processes in the contiguous U.S.

Comparison and assessment of coarse resolution land cover maps for Northern Eurasia

Cryptolepiota, a new sequestrate genus in the Agaricaceae with evidence for adaptive radiation in western North America

Uncertainty analysis: an evaluation metric for synthesis science

Conditions favouring Bromus tectorum dominance of endangered sagebrush steppe ecosystems

The enigmatic truffle Fevansia aurantiaca is an ectomycorrhizal member of the Albatrellus lineage

Ecological effects of alternative fuel-reduction treatments: highlights of the National Fire and Fire Surrogate study (FFS)

The Roles of Large Top Predators in Coastal Ecosystems: New Insights from long Term Ecological Research

New North American truffles (Tuber spp.) and their ectomycorrhizal associations

Regional variation in stand structure and development in forests of Oregon, Washington, and inland Northern California

Adapting to Climate Change on Western Public Lands: Addressing the Ecological Effects of Domestic, Wild, and Feral Ungulates

A simple tool for estimating throughfall nitrogen deposition in forests of western North America using lichens

Historical Biogeography and Diversification of Truffles in the Tuberaceae and Their Newly Identified Southern Hemisphere Sister Lineage

Calculating CO2 and H2O eddy covariance fluxes from an enclosed gas analyzer using an instantaneous mixing ratio

Recovering lost ground: Effects of soil burn intensity on nutrients and ectomycorrhiza communities of ponderosa pine seedlings

Post-fire tree establishment and early cohort development in conifer forests of the western Cascades of Oregon, USA

Do Ray Cells Provide a Pathway for Radial Water Movement in the Stems of Conifer Trees?

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