Index Catalog // ScholarsArchive@OSU

Using Landsat-derived disturbance and recovery history and lidar to map forest biomass dynamics

Creator:: Pflugmacher, Dirk, Cohen, Warren B., Kennedy, Robert E., and Yang, Zhiqiang
Abstract:: Improved monitoring of forest biomass and biomass change is needed to quantify natural and anthropogenic effects on the terrestrial carbon cycle. Landsat's temporal and spatial coverage, moderate spatial resolution, and long history of earth observations provide a unique opportunity for characterizing vegetation changes across large areas and long time scales....
Resource Type:: Article
Full Text:: recovery history and lidar tomap forest biomass dynamics Dirk Pflugmacher a,⁎, Warren B. Cohen b, Robert E

Using Landsat-derived disturbance history (1972–2010) to predict current forest structure

Creator:: Pflugmacher, Dirk, Cohen, Warren B., and Kennedy, Robert E.
Abstract:: Lidar is currently the most accurate method for remote estimation of forest structure, but it has limited spatial and temporal coverage. Conversely, Landsat data are more widely available, but exhibit a weaker relationship with structure under medium to high leaf area conditions. One potentially valuable means of enhancing the relationship...
Resource Type:: Article
Full Text:: Pflugmacher a,⁎, Warren B. Cohen b, Robert E. Kennedy a a Department of Forest Ecosystems and Society, Oregon

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...
Resource Type:: Article
Full Text:: ,⁎, Robert E. Kennedy a, Warren B. Cohen b a Department of Forest Ecosystems and Society, Oregon State

MeigsGarrettForestryBringingEcologicalView_SupplementalInformation.pdf

Creator:: Kennedy, Robert E., Andréfouët, Serge, Cohen, Warren B., Meigs, Garrett W., and et al.
Abstract:: When characterizing the processes that shape ecosystems, ecologists increasingly use the unique perspective offered by repeat observations of remotely sensed imagery. However, the concept of change embodied in much of the traditional remote-sensing literature was primarily limited to capturing large or extreme changes occurring in natural systems, omitting many more...

MeigsGarrettForestryBringingEcologicalView.pdf

Creator:: Kennedy, Robert E., Andréfouët, Serge, Cohen, Warren B., Meigs, Garrett W., and et al.
Abstract:: When characterizing the processes that shape ecosystems, ecologists increasingly use the unique perspective offered by repeat observations of remotely sensed imagery. However, the concept of change embodied in much of the traditional remote-sensing literature was primarily limited to capturing large or extreme changes occurring in natural systems, omitting many more...
Full Text:: ., Andréfouët, S., Cohen, W. B., Gómez, C., Griffiths, P., Hais, M., ... & Zhu, Z. (2014). Bringing an

Spatial and temporal patterns of forest disturbance and regrowth within the area of the Northwest Forest Plan

Creator:: Kennedy, Robert E., Yang, Zhiqiang, Cohen, Warren B., Pfaff, Eric, Braaten, Justin, and Nelson, Peder
Abstract:: Understanding fine-grain patterns of forest disturbance and regrowth at the landscape scale is critical for effective management, particularly in forests in western Washington, Oregon, and California, U.S., where the policy known as the Northwest Forest Plan (NWFP) was imposed in 1994 over > 8 million ha of forest in an...
Resource Type:: Article
Full Text:: area of the Northwest Forest Plan Robert E. Kennedy a,⁎, Zhiqiang Yang a, Warren B. Cohen b, Eric

Assessing the Carbon Consequences of Western Juniper (Juniperus occidentalis) Encroachment Across Oregon, USA

Creator:: Campbell, John L., Kennedy, Robert E., Cohen, Warren B., and Miller, Richard F.
Abstract:: Our ability to assess the continental impacts of woody encroachment remains compromised by the paucity of studies quantifying regional encroachment rates. This knowledge gap is especially apparent when it comes to quantifying the impact of woody encroachment on large-scale carbon dynamics. In this study, we use a combination of aerial...
Resource Type:: Article
Full Text:: occidentalis) Encroachment Across Oregon, USA John L. Campbell,1 Robert E. Kennedy,2 Warren B. Cohen,3 and

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...
Resource Type:: Article
Full Text:: Using Landsat Time Series Jeffrey G. Masek,1* Samuel N. Goward,2 Robert E. Kennedy,3,4 Warren B. Cohen

Mapping change of older forest with nearest-neighbor imputation and Landsat time-series

Creator:: Ohmann, Janet L., Gregory, Matthew J., Roberts, Heather M., Cohen, Warren B., Kennedy, Robert E., and Yang, Zhiqiang
Abstract:: The Northwest Forest Plan (NWFP), which aims to conserve late-successional and old-growth forests (older forests) and associated species, established new policies on federal lands in the Pacific Northwest USA. As part of monitoring for the NWFP, we tested nearest-neighbor imputation for mapping change in older forest, defined by threshold values...
Resource Type:: Article
Full Text:: and Landsat time-series Janet L. Ohmann a,⇑, Matthew J. Gregory b, Heather M. Roberts b, Warren B

Improving estimates of forest disturbance by combining observations from Landsat time series with U.S. Forest Service Forest Inventory and Analysis data

Creator:: Schroeder, Todd A., Healey, Sean P., Moisen, Gretchen G., Frescino, Tracey S., Cohen, Warren B., Huang, Chengquan, Kennedy, Robert E., and Yang, Zhiqiang
Abstract:: With earth's surface temperature and human population both on the rise a new emphasis has been placed on monitoring changes to forested ecosystems the world over. In the United States the U.S. Forest Service Forest Inventory and Analysis (FIA) program monitors the forested land base with field data collected over...
Resource Type:: Article
Full Text:: ., Frescino, T. S., Cohen, W. B., Huang, C., ... & Yang, Z. (2014). Improving estimates of forest disturbance

ScholarsArchive@OSU

Using Landsat-derived disturbance and recovery history and lidar to map forest biomass dynamics

Using Landsat-derived disturbance history (1972–2010) to predict current forest structure

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

MeigsGarrettForestryBringingEcologicalView_SupplementalInformation.pdf

MeigsGarrettForestryBringingEcologicalView.pdf

Spatial and temporal patterns of forest disturbance and regrowth within the area of the Northwest Forest Plan

Assessing the Carbon Consequences of Western Juniper (Juniperus occidentalis) Encroachment Across Oregon, USA

United States Forest Disturbance Trends Observed Using Landsat Time Series

Mapping change of older forest with nearest-neighbor imputation and Landsat time-series

Improving estimates of forest disturbance by combining observations from Landsat time series with U.S. Forest Service Forest Inventory and Analysis data

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