Stephen T Jackson, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 46
Managing the whole landscape: Historical, hybrid, and novel ecosystems
The reality confronting ecosystem managers today is one of heterogeneous, rapidly transforming landscapes, particularly in the areas more affected by urban and agricultural development. A landscape management framework that incorporates all systems, across the spectrum of degrees of alteration, provides a fuller set of options for how and when to intervene, uses limited resources more effectively,
Authors
Richard J. Hobbs, Eric S. Higgs, Carol M. Hall, Peter Bridgewater, F. Stuart Chapin, John J. Ewel, Lauren M. Hallett, Erle C. Ellis, James Harris, Kristen B. Hulvey, Stephen T. Jackson, Patricia L. Kennedy, Christoph Kueffer, Lori Lach, Trevor C. Lantz, Ariel E. Lugo, Joseph Mascaro, Stephen D. Murphy, Cara Nelson, Michael P. Perring, David M. Richardson, Timothy Seastedt, Rachel J. Standish, Brian M. Starzomski, Katharine N. Suding, Pedro M. Tognetti, Laith Yakob, Laurie Yung
Climate remains an important driver of post-European vegetation change in the eastern United States
The influence of climate on forest change during the past century in the eastern United States was evaluated in a recent paper (Nowacki & Abrams, 2014) that centers on an increase in ‘highly competitive mesophytic hardwoods’ (Nowacki & Abrams, 2008) and a concomitant decrease in the more xerophytic Quercus species. Nowacki & Abrams (2014) concluded that climate change has not contributed significa
Authors
Neil Pederson, Anthony W. D’Amato, James M. Dyer, David R. Foster, David Goldblum, Justin L. Hart, Amy E. Hessl, Louis R. Iverson, Stephen T. Jackson, Dario Martin-Benito, Brian C. McCarthy, Ryan W. McEwan, David J. Mladenoff, Albert J. Parker, Bryan Shuman, John W. Williams
Identifying the pollen of an extinct spruce species in the Late Quaternary sediments of the Tunica Hills region, south-eastern United States
Late Quaternary fluvial deposits in the Tunica Hills region of Louisiana and Mississippi are rich in spruce macrofossils of the extinct species Picea critchfieldii, the one recognized plant extinction of the Late Quaternary. However, the morphology of P. critchfieldii pollen is unknown, presenting a barrier to the interpretation of pollen spectra from the last glacial of North America. To address
Authors
Luke Mander, Jacklyn Rodriguez, Pietra G. Mueller, Stephen T. Jackson, Surangi W. Punyasena
The changing role of history in restoration ecology
In the face of rapid environmental and cultural change, orthodox concepts in restoration ecology such as historical fidelity are being challenged. Here we re-examine the diverse roles played by historical knowledge in restoration, and argue that these roles remain vitally important. As such, historical knowledge will be critical in shaping restoration ecology in the future. Perhaps the most crucia
Authors
Eric Higgs, Donald A. Falk, Anita Guerrini, Marcus Hall, Jim Harris, Richard J. Hobbs, Stephen T. Jackson, Jeanine M. Rhemtulla, William Throop
Space can substitute for time in predicting climate-change effects on biodiversity
“Space-for-time” substitution is widely used in biodiversity modeling to infer past or future trajectories of ecological systems from contemporary spatial patterns. However, the foundational assumption—that drivers of spatial gradients of species composition also drive temporal changes in diversity—rarely is tested. Here, we empirically test the space-for-time assumption by constructing orthogonal
Authors
Jessica L. Blois, John W. Williams, Matthew C. Fitzpatrick, Stephen T. Jackson, Simon Ferrier
Ecology and the ratchet of events: climate variability, niche dimensions, and species distributions
Climate change in the coming centuries will be characterized by interannual, decadal, and multidecadal fluctuations superimposed on anthropogenic trends. Predicting ecological and biogeographic responses to these changes constitutes an immense challenge for ecologists. Perspectives from climatic and ecological history indicate that responses will be laden with contingencies, resulting from episodi
Authors
Stephen T. Jackson, Julio L. Betancourt, Robert K. Booth, Stephen T. Gray
Classification tree and minimum-volume ellipsoid analyses of the distribution of ponderosa pine in the western USA
Aim? Ponderosa pine (Pinus ponderosa Douglas ex Lawson & C. Lawson) is an economically and ecologically important conifer that has a wide geographic range in the western USA, but is mostly absent from the geographic centre of its distribution - the Great Basin and adjoining mountain ranges. Much of its modern range was achieved by migration of geographically distinct Sierra Nevada (P. ponderosa va
Authors
Jodi R. Norris, Stephen T. Jackson, Julio L. Betancourt
Role of multidecadal climate variability in a range extension of pinyon pine
Evidence from woodrat middens and tree rings at Dutch John Mountain (DJM) in northeastern Utah reveal spatiotemporal patterns of pinyon pine (Pinus edulis Engelm.) colonization and expansion in the past millennium. The DJM population, a northern outpost of pinyon, was established by long-distance dispersal (~40 km). Growth of this isolate was markedly episodic and tracked multidecadal variability
Authors
Stephen T. Gray, Julio L. Betancourt, Stephen T. Jackson, Robert G. Eddy
A 40,000-year woodrat-midden record of vegetational and biogeographical dynamics in north-eastern Utah
Aim A conspicuous climatic and biogeographical transition occurs at 40-45° N in western North America. This pivot point marks a north–south opposition of wet and dry conditions at interannual and decadal time-scales, as well as the northern and southern limits of many dominant western plant species. Palaeoecologists have yet to focus on past climatic and biotic shifts along this transition, in par
Authors
Stephen T. Jackson, Julio L. Betancourt, Mark E. Lyford, Stephen T. Gray, Kate Aasen Rylander
Differentiating climatic and successional influences on long-term development of a marsh
Comparison of long—term records of local wetland vegetation dynamics with regional, climate—forced terrestrial vegetation changes can be used to differentiate the rates and effects of autogenic successional processes and allogenic environmental change on wetland vegetation dynamics. We studied Holocene plant macrofossil and pollen sequences from Portage Marsh, a shallow, 18—ha marsh in northeaster
Authors
Darren K. Singer, Stephen T. Jackson, Barbara J. Madsen, Douglas A. Wilcox
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 46
Managing the whole landscape: Historical, hybrid, and novel ecosystems
The reality confronting ecosystem managers today is one of heterogeneous, rapidly transforming landscapes, particularly in the areas more affected by urban and agricultural development. A landscape management framework that incorporates all systems, across the spectrum of degrees of alteration, provides a fuller set of options for how and when to intervene, uses limited resources more effectively,
Authors
Richard J. Hobbs, Eric S. Higgs, Carol M. Hall, Peter Bridgewater, F. Stuart Chapin, John J. Ewel, Lauren M. Hallett, Erle C. Ellis, James Harris, Kristen B. Hulvey, Stephen T. Jackson, Patricia L. Kennedy, Christoph Kueffer, Lori Lach, Trevor C. Lantz, Ariel E. Lugo, Joseph Mascaro, Stephen D. Murphy, Cara Nelson, Michael P. Perring, David M. Richardson, Timothy Seastedt, Rachel J. Standish, Brian M. Starzomski, Katharine N. Suding, Pedro M. Tognetti, Laith Yakob, Laurie Yung
Climate remains an important driver of post-European vegetation change in the eastern United States
The influence of climate on forest change during the past century in the eastern United States was evaluated in a recent paper (Nowacki & Abrams, 2014) that centers on an increase in ‘highly competitive mesophytic hardwoods’ (Nowacki & Abrams, 2008) and a concomitant decrease in the more xerophytic Quercus species. Nowacki & Abrams (2014) concluded that climate change has not contributed significa
Authors
Neil Pederson, Anthony W. D’Amato, James M. Dyer, David R. Foster, David Goldblum, Justin L. Hart, Amy E. Hessl, Louis R. Iverson, Stephen T. Jackson, Dario Martin-Benito, Brian C. McCarthy, Ryan W. McEwan, David J. Mladenoff, Albert J. Parker, Bryan Shuman, John W. Williams
Identifying the pollen of an extinct spruce species in the Late Quaternary sediments of the Tunica Hills region, south-eastern United States
Late Quaternary fluvial deposits in the Tunica Hills region of Louisiana and Mississippi are rich in spruce macrofossils of the extinct species Picea critchfieldii, the one recognized plant extinction of the Late Quaternary. However, the morphology of P. critchfieldii pollen is unknown, presenting a barrier to the interpretation of pollen spectra from the last glacial of North America. To address
Authors
Luke Mander, Jacklyn Rodriguez, Pietra G. Mueller, Stephen T. Jackson, Surangi W. Punyasena
The changing role of history in restoration ecology
In the face of rapid environmental and cultural change, orthodox concepts in restoration ecology such as historical fidelity are being challenged. Here we re-examine the diverse roles played by historical knowledge in restoration, and argue that these roles remain vitally important. As such, historical knowledge will be critical in shaping restoration ecology in the future. Perhaps the most crucia
Authors
Eric Higgs, Donald A. Falk, Anita Guerrini, Marcus Hall, Jim Harris, Richard J. Hobbs, Stephen T. Jackson, Jeanine M. Rhemtulla, William Throop
Space can substitute for time in predicting climate-change effects on biodiversity
“Space-for-time” substitution is widely used in biodiversity modeling to infer past or future trajectories of ecological systems from contemporary spatial patterns. However, the foundational assumption—that drivers of spatial gradients of species composition also drive temporal changes in diversity—rarely is tested. Here, we empirically test the space-for-time assumption by constructing orthogonal
Authors
Jessica L. Blois, John W. Williams, Matthew C. Fitzpatrick, Stephen T. Jackson, Simon Ferrier
Ecology and the ratchet of events: climate variability, niche dimensions, and species distributions
Climate change in the coming centuries will be characterized by interannual, decadal, and multidecadal fluctuations superimposed on anthropogenic trends. Predicting ecological and biogeographic responses to these changes constitutes an immense challenge for ecologists. Perspectives from climatic and ecological history indicate that responses will be laden with contingencies, resulting from episodi
Authors
Stephen T. Jackson, Julio L. Betancourt, Robert K. Booth, Stephen T. Gray
Classification tree and minimum-volume ellipsoid analyses of the distribution of ponderosa pine in the western USA
Aim? Ponderosa pine (Pinus ponderosa Douglas ex Lawson & C. Lawson) is an economically and ecologically important conifer that has a wide geographic range in the western USA, but is mostly absent from the geographic centre of its distribution - the Great Basin and adjoining mountain ranges. Much of its modern range was achieved by migration of geographically distinct Sierra Nevada (P. ponderosa va
Authors
Jodi R. Norris, Stephen T. Jackson, Julio L. Betancourt
Role of multidecadal climate variability in a range extension of pinyon pine
Evidence from woodrat middens and tree rings at Dutch John Mountain (DJM) in northeastern Utah reveal spatiotemporal patterns of pinyon pine (Pinus edulis Engelm.) colonization and expansion in the past millennium. The DJM population, a northern outpost of pinyon, was established by long-distance dispersal (~40 km). Growth of this isolate was markedly episodic and tracked multidecadal variability
Authors
Stephen T. Gray, Julio L. Betancourt, Stephen T. Jackson, Robert G. Eddy
A 40,000-year woodrat-midden record of vegetational and biogeographical dynamics in north-eastern Utah
Aim A conspicuous climatic and biogeographical transition occurs at 40-45° N in western North America. This pivot point marks a north–south opposition of wet and dry conditions at interannual and decadal time-scales, as well as the northern and southern limits of many dominant western plant species. Palaeoecologists have yet to focus on past climatic and biotic shifts along this transition, in par
Authors
Stephen T. Jackson, Julio L. Betancourt, Mark E. Lyford, Stephen T. Gray, Kate Aasen Rylander
Differentiating climatic and successional influences on long-term development of a marsh
Comparison of long—term records of local wetland vegetation dynamics with regional, climate—forced terrestrial vegetation changes can be used to differentiate the rates and effects of autogenic successional processes and allogenic environmental change on wetland vegetation dynamics. We studied Holocene plant macrofossil and pollen sequences from Portage Marsh, a shallow, 18—ha marsh in northeaster
Authors
Darren K. Singer, Stephen T. Jackson, Barbara J. Madsen, Douglas A. Wilcox
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.