Index Catalog // ScholarsArchive@OSU

Disturbance, tree mortality, and implications for contemporary regional forest change in the Pacific Northwest

Creator:: Reilly, Matthew J. and Spies, Thomas A.
Abstract:: Tree mortality is an important demographic process and primary driver of forest dynamics, yet there are relatively few plot-based studies that explicitly quantify mortality and compare the relative contribution of endogenous and exogenous disturbances at regional scales. We used repeated observations on 289,390 trees in 3673 1 ha plots on...
Resource Type:: Article
Full Text:: @oregonstate.edu (M.J. Reilly). Matthew J. Reilly a,⇑, Thomas A. Spies b aDepartment of Forest Ecosystems and

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...
Resource Type:: Article
Full Text:: development in forests of Oregon, Washington, and inland Northern California Reilly, M. J., & Spies, T. A

Structure and composition of unmanaged riparian forests in the coastal mountains of Oregon, U.S.A.

Creator:: Pabst, Robert J. and Spies, Thomas A.
Abstract:: We characterized the structure and composition of unmanaged riparian forests in three river basins in Oregon’s coastal mountains. Our objective was to evaluate stand attributes at three spatial scales: streamside (site), drainage network (stream order), and basin (subregion). Data on basal area, species composition, snag density, canopy cover, and tree...
Resource Type:: Article
Full Text:: forests in the coastal mountains of Oregon, U.S.A.1 Robert J. Pabst and Thomas A. Spies Abstract: We

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

Mixed-conifer forests of central Oregon: effects of logging and fire exclusion vary with environment

Creator:: Merschel, Andrew G., Spies, Thomas A., and Heyerdahl, Emily K.
Abstract:: Twentieth-century land management has altered the structure and composition of mixed-conifer forests and decreased their resilience to fire, drought, and insects in many parts of the Interior West. These forests occur across a wide range of environmental settings and historical disturbance regimes, so their response to land management is likely...
Resource Type:: Article
Full Text:: and fire exclusion vary with environment Merschel, A. G., Spies, T. A., & Heyerdahl, E. K. (2014

Fire-mediated pathways of stand development in Douglas-fir/ western hemlock forests of the Pacific Northwest, USA

Creator:: Tepley, Alan J., Swanson, Frederick J., and Spies, Thomas A.
Abstract:: Forests dominated by Douglas-fir and western hemlock in the Pacific Northwest of the United States have strongly influenced concepts and policy concerning old-growth forest conservation. Despite the attention to their old-growth characteristics, a tendency remains to view their disturbance ecology in relatively simple terms, emphasizing infrequent, stand-replacing (SR) fire and...
Resource Type:: Article
Full Text:: THOMAS A. SPIES2 1Departments of Geosciences and Forest Ecosystems and Society, Oregon State University

An individual-based process model to simulate landscape-scale forest ecosystem dynamics

Creator:: Seidl, Rupert, Rammer, Werner, Scheller, Robert M., and Spies, Thomas A.
Abstract:: Forest ecosystem dynamics emerges from nonlinear interactions between adaptive biotic agents (i.e., individual trees) and their relationship with a spatially and temporally heterogeneous abiotic environment. Understanding and predicting the dynamics resulting from these complex interactions is crucial for the sustainable stewardship of ecosystems, particularly in the context of rapidly changing...
Resource Type:: Article
Full Text:: to simulate landscape-scale forest ecosystem dynamics A e R a b c d a A R R A K F C I E H F

Canopy gaps affect long-term patterns of tree growth and mortality in mature and old-growth forests in the Pacific Northwest

Creator:: Gray, Andrew N., Spies, Thomas A., and Pabst, Robert J.
Abstract:: Canopy gaps created by tree mortality can affect the speed and trajectory of vegetation growth, species’ population dynamics, and spatial heterogeneity in mature forests. Most studies focus on plant development within gaps, yet gaps also affect the mortality and growth of surrounding trees, which influence shading and root encroachment into...
Resource Type:: Article
Full Text:: . Gray a,⇑, Thomas A. Spies a, Robert J. Pabst b aUSDA Forest Service Pacific Northwest Research Station

Forest Carbon Calculators: A Review for Managers, Policymakers, and Educators

Creator:: Zald, Harold S. J., Spies, Thomas A., Harmon, Mark E., and Twery, Mark J.
Abstract:: Forests play a critical role sequestering atmospheric carbon dioxide, partially offsetting greenhouse gas emissions, and thereby mitigating climate change. Forest management, natural disturbances, and the fate of carbon in wood products strongly influence carbon sequestration and emissions in the forest sector. Government policies, carbon offset and trading programs, and sustainable...
Resource Type:: Article

Multi-scale Drivers of Spatial Variation in Old-Growth Forest Carbon Density Disentangled with Lidar and an Individual-Based Landscape Model

Creator:: Seidl, Rupert, Spies, Thomas A., Rammer, Werner, Steel, E. Ashley, Pabst, Robert J., and Olsen, Keith
Abstract:: Forest ecosystems are the most important terrestrial carbon (C) storage globally, and presently mitigate anthropogenic climate change by acting as a large and persistent sink for atmospheric CO₂. Yet, forest C density varies greatly in space, both globally and at stand and landscape levels. Understanding the multi-scale drivers of this...
Resource Type:: Article
Full Text:: Seidl,1,2* Thomas A. Spies,3 Werner Rammer,2 E. Ashley Steel,4 Robert J. Pabst,1 and Keith Olsen1

ScholarsArchive@OSU

Disturbance, tree mortality, and implications for contemporary regional forest change in the Pacific Northwest

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

Structure and composition of unmanaged riparian forests in the coastal mountains of Oregon, U.S.A.

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

Mixed-conifer forests of central Oregon: effects of logging and fire exclusion vary with environment

Fire-mediated pathways of stand development in Douglas-fir/ western hemlock forests of the Pacific Northwest, USA

An individual-based process model to simulate landscape-scale forest ecosystem dynamics

Canopy gaps affect long-term patterns of tree growth and mortality in mature and old-growth forests in the Pacific Northwest

Forest Carbon Calculators: A Review for Managers, Policymakers, and Educators

Multi-scale Drivers of Spatial Variation in Old-Growth Forest Carbon Density Disentangled with Lidar and an Individual-Based Landscape Model

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