Sarah Shafer
Sarah Shafer is a Research Geologist for the Geosciences and Environmental Change Science Center
Science and Products
Filter Total Items: 37
Atlas of relations between climatic parameters and distributions of important trees and shrubs in North America - Alaska species and ecoregions Atlas of relations between climatic parameters and distributions of important trees and shrubs in North America - Alaska species and ecoregions
Climate is the primary factor in controlling the continental-scale distribution of plant species, although the relations between climatic parameters and species' ranges is only now beginning to be quantified. Preceding volumes of this atlas explored the continental-scale relations between climatic parameters and the distributions of woody plant species across all of the continent of...
Authors
Robert S. Thompson, Katherine H. Anderson, Laura E. Strickland, Sarah L. Shafer, Richard T. Pelltier, Patrick J. Bartlein
Understanding the spatial heterogeneity of global environmental change in mountain regions Understanding the spatial heterogeneity of global environmental change in mountain regions
One of the challenges for global environmental change research is to understand how future climate changes will be expressed in mountain regions. The physiographic complexity of mountains creates environments that can be highly variable over relatively short distances. This spatial heterogeneity reflects a hierarchy of environmental controls. At regional scales, insolation and...
Authors
Sarah Shafer, Patrick J. Bartlein, Cathy Whitlock
Topographic, bioclimatic, and vegetation characteristics of three ecoregion classification systems in North America: Comparisons along continent-wide transects Topographic, bioclimatic, and vegetation characteristics of three ecoregion classification systems in North America: Comparisons along continent-wide transects
Ecoregion classification systems are increasingly used for policy and management decisions, particularly among conservation and natural resource managers. A number of ecoregion classification systems are currently available, with each system defining ecoregions using different classification methods and different types of data. As a result, each classification system describes a unique...
Authors
R.S. Thompson, S.L. Shafer, K. H. Anderson, L.E. Strickland, R.T. Pelltier, P. J. Bartlein, M.W. Kerwin
Vital signs monitoring plan for the Klamath Network: Phase I report Vital signs monitoring plan for the Klamath Network: Phase I report
This report chronicles the Phase 1 stage of the vital signs monitoring program for the Klamath Network. It consists of two chapters and eleven appendixes. The purposes of Chapter One are to 1) describe the network administrative structure and approach to planning; 2) introduce the Klamath Network parks, their resources, and environmental settings; 3) explain the need for monitoring...
Authors
Daniel Sarr, Dennis Odion, Robert E. Truitt, Erik A. Beever, Sarah Shafer, Andrew Duff, Sean B. Smith, Windy Bunn, Judy Rocchio, Eli Sarnat, John Alexander, Steve Jessup
Quaternary vegetation and climate change in the western United States: Developments, perspectives, and prospects Quaternary vegetation and climate change in the western United States: Developments, perspectives, and prospects
This chapter explores the strengths and shortcomings of the major sources of data on Quaternary vegetation and climate change and discusses the use of models as a means to explore past and potential future environmental changes. The flora and major vegetation types of the western United States are present for several million years. Ongoing changes in atmospheric chemistry, climate, and...
Authors
Robert S. Thompson, Sarah Shafer, Laura E. Strickland, Peter K. Van De Water, Katherine H. Anderson
The role of climate and vegetation change in shaping past and future fire regimes in the northwestern US and the implications for ecosystem management The role of climate and vegetation change in shaping past and future fire regimes in the northwestern US and the implications for ecosystem management
Fire is an important part of the disturbance regimes of northwestern US forests and its role in maintaining and altering forest vegetation is evident in the paleoecological record of the region. Long-term reconstructions of Holocene fire regimes, provided by the analysis of charcoal, pollen, and other fire proxies in a network of lake records, indicate that the Pacific Northwest and...
Authors
C. Whitlock, S.L. Shafer, J. Marlon
Science and Products
Filter Total Items: 37
Atlas of relations between climatic parameters and distributions of important trees and shrubs in North America - Alaska species and ecoregions Atlas of relations between climatic parameters and distributions of important trees and shrubs in North America - Alaska species and ecoregions
Climate is the primary factor in controlling the continental-scale distribution of plant species, although the relations between climatic parameters and species' ranges is only now beginning to be quantified. Preceding volumes of this atlas explored the continental-scale relations between climatic parameters and the distributions of woody plant species across all of the continent of...
Authors
Robert S. Thompson, Katherine H. Anderson, Laura E. Strickland, Sarah L. Shafer, Richard T. Pelltier, Patrick J. Bartlein
Understanding the spatial heterogeneity of global environmental change in mountain regions Understanding the spatial heterogeneity of global environmental change in mountain regions
One of the challenges for global environmental change research is to understand how future climate changes will be expressed in mountain regions. The physiographic complexity of mountains creates environments that can be highly variable over relatively short distances. This spatial heterogeneity reflects a hierarchy of environmental controls. At regional scales, insolation and...
Authors
Sarah Shafer, Patrick J. Bartlein, Cathy Whitlock
Topographic, bioclimatic, and vegetation characteristics of three ecoregion classification systems in North America: Comparisons along continent-wide transects Topographic, bioclimatic, and vegetation characteristics of three ecoregion classification systems in North America: Comparisons along continent-wide transects
Ecoregion classification systems are increasingly used for policy and management decisions, particularly among conservation and natural resource managers. A number of ecoregion classification systems are currently available, with each system defining ecoregions using different classification methods and different types of data. As a result, each classification system describes a unique...
Authors
R.S. Thompson, S.L. Shafer, K. H. Anderson, L.E. Strickland, R.T. Pelltier, P. J. Bartlein, M.W. Kerwin
Vital signs monitoring plan for the Klamath Network: Phase I report Vital signs monitoring plan for the Klamath Network: Phase I report
This report chronicles the Phase 1 stage of the vital signs monitoring program for the Klamath Network. It consists of two chapters and eleven appendixes. The purposes of Chapter One are to 1) describe the network administrative structure and approach to planning; 2) introduce the Klamath Network parks, their resources, and environmental settings; 3) explain the need for monitoring...
Authors
Daniel Sarr, Dennis Odion, Robert E. Truitt, Erik A. Beever, Sarah Shafer, Andrew Duff, Sean B. Smith, Windy Bunn, Judy Rocchio, Eli Sarnat, John Alexander, Steve Jessup
Quaternary vegetation and climate change in the western United States: Developments, perspectives, and prospects Quaternary vegetation and climate change in the western United States: Developments, perspectives, and prospects
This chapter explores the strengths and shortcomings of the major sources of data on Quaternary vegetation and climate change and discusses the use of models as a means to explore past and potential future environmental changes. The flora and major vegetation types of the western United States are present for several million years. Ongoing changes in atmospheric chemistry, climate, and...
Authors
Robert S. Thompson, Sarah Shafer, Laura E. Strickland, Peter K. Van De Water, Katherine H. Anderson
The role of climate and vegetation change in shaping past and future fire regimes in the northwestern US and the implications for ecosystem management The role of climate and vegetation change in shaping past and future fire regimes in the northwestern US and the implications for ecosystem management
Fire is an important part of the disturbance regimes of northwestern US forests and its role in maintaining and altering forest vegetation is evident in the paleoecological record of the region. Long-term reconstructions of Holocene fire regimes, provided by the analysis of charcoal, pollen, and other fire proxies in a network of lake records, indicate that the Pacific Northwest and...
Authors
C. Whitlock, S.L. Shafer, J. Marlon