James Grace, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 187
Short-term disruption of a leafy spurge (Euphorbia esula) biocontrol program following herbicide application Short-term disruption of a leafy spurge (Euphorbia esula) biocontrol program following herbicide application
Integrated pest management (IPM) for invasive plant species is being advocated by researchers and implemented by land managers, but few studies have evaluated the success of IPM programs in natural areas. We assessed the relative effects of components of an IPM program for leafy spurge (Euphorbia esula), an invasive plant, at Theodore Roosevelt National Park, North Dakota. Effects of...
Authors
D.L. Larson, J.B. Grace, P.A. Rabie, P. Andersen
Forage nutritive quality in the Serengeti ecosystem: The roles of fire and herbivory Forage nutritive quality in the Serengeti ecosystem: The roles of fire and herbivory
Fire and herbivory are important determinants of nutrient availability in savanna ecosystems. Fire and herbivory effects on the nutritive quality of savanna vegetation can occur directly, independent of changes in the plant community, or indirectly, via effects on the plant community. Indirect effects can be further subdivided into those occurring because of changes in plant species...
Authors
T.M. Anderson, M.E. Ritchie, E. Mayemba, S. Eby, J.B. Grace, S.J. McNaughton
Prescribed fire and cutting as tools for reducing woody plant succession in a created salt marsh Prescribed fire and cutting as tools for reducing woody plant succession in a created salt marsh
This paper reports on efforts to reduce woody successional growth by the native shrub Iva frutescens L. in a created salt marsh by using prescribed fire and cutting. Experimental treatments included a winter burn, cutting plants at ground level, and a combination burn-and-cut treatment, with replicate plots of each. Iva frutescens proved to be extremely hardy, with zero mortality...
Authors
A.B. Owens, C.E. Proffitt, J.B. Grace
Responses of prairie arthropod communities to fire and fertilizer: Balancing plant and arthropod conservation Responses of prairie arthropod communities to fire and fertilizer: Balancing plant and arthropod conservation
Fire is an important tool for limiting woody plant invasions into prairies, but using fire management to maintain grassland plant communities may inadvertently reduce arthropod diversity. To test this, we established twenty-four 100 m2 plots in a tallgrass prairie in Galveston County, Texas, in spring 2000. Plots were assigned a fire (no burn, one time burn [2000], two time burn [2000...
Authors
M.K. Hartley, W.E. Rogers, E. Siemann, J. Grace
Cultural diversity, economic development and societal instability Cultural diversity, economic development and societal instability
Background. Social scientists have suggested that cultural diversity in a nation leads to societal instability. However, societal instability may be affected not only by within-nation on ?? diversity, but also diversity between a nation and its neighbours or ?? diversity. It is also necessary to distinguish different domains of diversity, namely linguistic, ethnic and religious, and to...
Authors
D. Nettle, J.B. Grace, M. Choisy, H.V. Cornell, J.-F. Guegan, M.E. Hochberg
Structural equation modeling and natural systems Structural equation modeling and natural systems
This book, first published in 2006, presents an introduction to the methodology of structural equation modeling, illustrates its use, and goes on to argue that it has revolutionary implications for the study of natural systems. A major theme of this book is that we have, up to this point, attempted to study systems primarily using methods (such as the univariate model) that were designed...
Authors
James B. Grace
Science and Products
Filter Total Items: 187
Short-term disruption of a leafy spurge (Euphorbia esula) biocontrol program following herbicide application Short-term disruption of a leafy spurge (Euphorbia esula) biocontrol program following herbicide application
Integrated pest management (IPM) for invasive plant species is being advocated by researchers and implemented by land managers, but few studies have evaluated the success of IPM programs in natural areas. We assessed the relative effects of components of an IPM program for leafy spurge (Euphorbia esula), an invasive plant, at Theodore Roosevelt National Park, North Dakota. Effects of...
Authors
D.L. Larson, J.B. Grace, P.A. Rabie, P. Andersen
Forage nutritive quality in the Serengeti ecosystem: The roles of fire and herbivory Forage nutritive quality in the Serengeti ecosystem: The roles of fire and herbivory
Fire and herbivory are important determinants of nutrient availability in savanna ecosystems. Fire and herbivory effects on the nutritive quality of savanna vegetation can occur directly, independent of changes in the plant community, or indirectly, via effects on the plant community. Indirect effects can be further subdivided into those occurring because of changes in plant species...
Authors
T.M. Anderson, M.E. Ritchie, E. Mayemba, S. Eby, J.B. Grace, S.J. McNaughton
Prescribed fire and cutting as tools for reducing woody plant succession in a created salt marsh Prescribed fire and cutting as tools for reducing woody plant succession in a created salt marsh
This paper reports on efforts to reduce woody successional growth by the native shrub Iva frutescens L. in a created salt marsh by using prescribed fire and cutting. Experimental treatments included a winter burn, cutting plants at ground level, and a combination burn-and-cut treatment, with replicate plots of each. Iva frutescens proved to be extremely hardy, with zero mortality...
Authors
A.B. Owens, C.E. Proffitt, J.B. Grace
Responses of prairie arthropod communities to fire and fertilizer: Balancing plant and arthropod conservation Responses of prairie arthropod communities to fire and fertilizer: Balancing plant and arthropod conservation
Fire is an important tool for limiting woody plant invasions into prairies, but using fire management to maintain grassland plant communities may inadvertently reduce arthropod diversity. To test this, we established twenty-four 100 m2 plots in a tallgrass prairie in Galveston County, Texas, in spring 2000. Plots were assigned a fire (no burn, one time burn [2000], two time burn [2000...
Authors
M.K. Hartley, W.E. Rogers, E. Siemann, J. Grace
Cultural diversity, economic development and societal instability Cultural diversity, economic development and societal instability
Background. Social scientists have suggested that cultural diversity in a nation leads to societal instability. However, societal instability may be affected not only by within-nation on ?? diversity, but also diversity between a nation and its neighbours or ?? diversity. It is also necessary to distinguish different domains of diversity, namely linguistic, ethnic and religious, and to...
Authors
D. Nettle, J.B. Grace, M. Choisy, H.V. Cornell, J.-F. Guegan, M.E. Hochberg
Structural equation modeling and natural systems Structural equation modeling and natural systems
This book, first published in 2006, presents an introduction to the methodology of structural equation modeling, illustrates its use, and goes on to argue that it has revolutionary implications for the study of natural systems. A major theme of this book is that we have, up to this point, attempted to study systems primarily using methods (such as the univariate model) that were designed...
Authors
James B. Grace