James Grace, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 187
Long-term dynamics of Typha populations Long-term dynamics of Typha populations
The zonation of Typha populations in an experimental pond in Michigan was re-examined 15 years after the original sampling to gain insight into the long-term dynamics. Current distributions of Typha populations were also examined in additional experimental ponds at the site that have been maintained for 23 years. The zonation between T. latifolia and T. angustifolia in the previously...
Authors
J.B. Grace, R.G. Wetzel
Effects of flooding, salinity and herbivory on coastal plant communities, Louisiana, United States Effects of flooding, salinity and herbivory on coastal plant communities, Louisiana, United States
Flooding and salinity stress are predicted to increase in coastal Louisiana as relative sea level rise (RSLR) continues in the Gulf of Mexico region. Although wetland plant species are adapted to these stressors, questions persist as to how marshes may respond to changed abiotic variables caused by RSLR, and how herbivory by native and non-native mammals may affect this response. The...
Authors
L. Gough, J.B. Grace
Herbivore effects on plant species density at varying productivity levels Herbivore effects on plant species density at varying productivity levels
Artificially increasing primary productivity decreases plant species richness in many habitats; herbivory may affect this outcome, but it has rarely been directly addressed in fertilization studies. This experiment was conducted in two Louisiana coastal marshes to examine the effects of nutrient enrichment and sediment addition on herbaceous plant communities with and without vertebrate...
Authors
L. Gough, J.B. Grace
A structural equation model of plant species richness and its application to a coastal wetland A structural equation model of plant species richness and its application to a coastal wetland
Studies of plant species richness have often emphasized the role of either community biomass (as an indicator of density effects) or abiotic factors. In this article we present a general model that simultaneously examines the relative importance of abiotic and density effects. General and specific models were developed to examine the importance of abiotic conditions, disturbance, and...
Authors
J.B. Grace, B.H. Pugesek
The influence of vines on an oligohaline marsh community: Results of a removal and fertilization study The influence of vines on an oligohaline marsh community: Results of a removal and fertilization study
The effects of competitive suppression by vines on the non-vine plant community have received little attention in temperate habitats. This study investigated the impact vines have on their herbaceous hosts in a wetland community at two soil fertility levels. Plots in an oligohaline marsh were treated in a 2 x 2 factorial design with vine removal and fertilization over two growing seasons...
Authors
L. Gough, J.B. Grace
The effects of herbivory on neighbor interactions along a coastal marsh gradient The effects of herbivory on neighbor interactions along a coastal marsh gradient
Many current theories of community function are based on the assumption that disturbances such as herbivory act to reduce the importance of neighbor interactions among plants. In this study, we examined the effects of herbivory (primarily by nutria, Myocastor coypus) on neighbor interactions between three dominant grasses in three coastal marsh communities, fresh, oligohaline, and...
Authors
K.L. Taylor, J.B. Grace, B.D. Marx
The potential impact of herbivores on the susceptibility of the marsh plant Sagittaria lancifolia to saltwater intrusion in coastal wetlands The potential impact of herbivores on the susceptibility of the marsh plant Sagittaria lancifolia to saltwater intrusion in coastal wetlands
The objective of this study was to experimentally evaluate the effects of simulated herbivory on the ability of a freshwater marsh plant to recover from temporary saltwater intrusion such as can be caused by tropical storms. Sods containing Sagittaria lancifolia, a dominant plant in interior coastal marshes, were manipulated in the field so as to subject plants to a pulse of 15‰ salt...
Authors
James B. Grace, Mark Ford
Effects of nutrients and hydroperiod on Typha, Cladium, and Eleocharis: Implications for everglades restoration Effects of nutrients and hydroperiod on Typha, Cladium, and Eleocharis: Implications for everglades restoration
The recent expansion of Typha domingensis (Typha) into areas of the Everglades previously dominated by Cladium jamaicense (Cladium) communities has led to competing hypotheses about the importance of nutrient concentration vs. hydroperiod in controlling the distribution of these species. In this study, experimental mixtures of Typha domingensis, Cladium jamaicense, and Eleocharis...
Authors
S. Newman, James B. Grace, J. W. Koebel
On the relationship between plant species diversity and biomass: A comment on a paper by Gough, Grace and Taylor On the relationship between plant species diversity and biomass: A comment on a paper by Gough, Grace and Taylor
No abstract available.
Authors
R. H. Marrs, James B. Grace, L. Gough
Disturbance and recovery of the Louisiana coastal marsh landscape from the impacts of Hurricane Andrew Disturbance and recovery of the Louisiana coastal marsh landscape from the impacts of Hurricane Andrew
The impact of Hurricane Andrew on the Louisiana coastal landscape and the initial recovery of wetland plant communities was determined from extensive surveys of a large geographic region of coastal marsh near Atchafalaya Bay and intensive studies of an oligohaline marsh on Otter Bayou. Wind and water movements associated with the hurricane resulted in the formation of compressed marsh...
Authors
Glenn R. Guntenspergen, Donald R. Cahoon, James B. Grace, Gregory D. Steyer, Stephen Fournet, M. A. Townson, A. Lee Foote
On the measurement of plant competition intensity On the measurement of plant competition intensity
No abstract available.
Authors
James B. Grace
Science and Products
Filter Total Items: 187
Long-term dynamics of Typha populations Long-term dynamics of Typha populations
The zonation of Typha populations in an experimental pond in Michigan was re-examined 15 years after the original sampling to gain insight into the long-term dynamics. Current distributions of Typha populations were also examined in additional experimental ponds at the site that have been maintained for 23 years. The zonation between T. latifolia and T. angustifolia in the previously...
Authors
J.B. Grace, R.G. Wetzel
Effects of flooding, salinity and herbivory on coastal plant communities, Louisiana, United States Effects of flooding, salinity and herbivory on coastal plant communities, Louisiana, United States
Flooding and salinity stress are predicted to increase in coastal Louisiana as relative sea level rise (RSLR) continues in the Gulf of Mexico region. Although wetland plant species are adapted to these stressors, questions persist as to how marshes may respond to changed abiotic variables caused by RSLR, and how herbivory by native and non-native mammals may affect this response. The...
Authors
L. Gough, J.B. Grace
Herbivore effects on plant species density at varying productivity levels Herbivore effects on plant species density at varying productivity levels
Artificially increasing primary productivity decreases plant species richness in many habitats; herbivory may affect this outcome, but it has rarely been directly addressed in fertilization studies. This experiment was conducted in two Louisiana coastal marshes to examine the effects of nutrient enrichment and sediment addition on herbaceous plant communities with and without vertebrate...
Authors
L. Gough, J.B. Grace
A structural equation model of plant species richness and its application to a coastal wetland A structural equation model of plant species richness and its application to a coastal wetland
Studies of plant species richness have often emphasized the role of either community biomass (as an indicator of density effects) or abiotic factors. In this article we present a general model that simultaneously examines the relative importance of abiotic and density effects. General and specific models were developed to examine the importance of abiotic conditions, disturbance, and...
Authors
J.B. Grace, B.H. Pugesek
The influence of vines on an oligohaline marsh community: Results of a removal and fertilization study The influence of vines on an oligohaline marsh community: Results of a removal and fertilization study
The effects of competitive suppression by vines on the non-vine plant community have received little attention in temperate habitats. This study investigated the impact vines have on their herbaceous hosts in a wetland community at two soil fertility levels. Plots in an oligohaline marsh were treated in a 2 x 2 factorial design with vine removal and fertilization over two growing seasons...
Authors
L. Gough, J.B. Grace
The effects of herbivory on neighbor interactions along a coastal marsh gradient The effects of herbivory on neighbor interactions along a coastal marsh gradient
Many current theories of community function are based on the assumption that disturbances such as herbivory act to reduce the importance of neighbor interactions among plants. In this study, we examined the effects of herbivory (primarily by nutria, Myocastor coypus) on neighbor interactions between three dominant grasses in three coastal marsh communities, fresh, oligohaline, and...
Authors
K.L. Taylor, J.B. Grace, B.D. Marx
The potential impact of herbivores on the susceptibility of the marsh plant Sagittaria lancifolia to saltwater intrusion in coastal wetlands The potential impact of herbivores on the susceptibility of the marsh plant Sagittaria lancifolia to saltwater intrusion in coastal wetlands
The objective of this study was to experimentally evaluate the effects of simulated herbivory on the ability of a freshwater marsh plant to recover from temporary saltwater intrusion such as can be caused by tropical storms. Sods containing Sagittaria lancifolia, a dominant plant in interior coastal marshes, were manipulated in the field so as to subject plants to a pulse of 15‰ salt...
Authors
James B. Grace, Mark Ford
Effects of nutrients and hydroperiod on Typha, Cladium, and Eleocharis: Implications for everglades restoration Effects of nutrients and hydroperiod on Typha, Cladium, and Eleocharis: Implications for everglades restoration
The recent expansion of Typha domingensis (Typha) into areas of the Everglades previously dominated by Cladium jamaicense (Cladium) communities has led to competing hypotheses about the importance of nutrient concentration vs. hydroperiod in controlling the distribution of these species. In this study, experimental mixtures of Typha domingensis, Cladium jamaicense, and Eleocharis...
Authors
S. Newman, James B. Grace, J. W. Koebel
On the relationship between plant species diversity and biomass: A comment on a paper by Gough, Grace and Taylor On the relationship between plant species diversity and biomass: A comment on a paper by Gough, Grace and Taylor
No abstract available.
Authors
R. H. Marrs, James B. Grace, L. Gough
Disturbance and recovery of the Louisiana coastal marsh landscape from the impacts of Hurricane Andrew Disturbance and recovery of the Louisiana coastal marsh landscape from the impacts of Hurricane Andrew
The impact of Hurricane Andrew on the Louisiana coastal landscape and the initial recovery of wetland plant communities was determined from extensive surveys of a large geographic region of coastal marsh near Atchafalaya Bay and intensive studies of an oligohaline marsh on Otter Bayou. Wind and water movements associated with the hurricane resulted in the formation of compressed marsh...
Authors
Glenn R. Guntenspergen, Donald R. Cahoon, James B. Grace, Gregory D. Steyer, Stephen Fournet, M. A. Townson, A. Lee Foote
On the measurement of plant competition intensity On the measurement of plant competition intensity
No abstract available.
Authors
James B. Grace