James Grace, Ph.D.
James Grace is a Senior Research Scientist at the USGS Wetland and Aquatic Research Center.
BACKGROUND
2015 - present Senior Research Scientist. U.S. Geological Survey, ST
2002 - 2014 Senior Research Ecologist, U.S. Geological Survey, GS-15
1993 - 2019 Adjunct Professor, Department of Biology, University of Louisiana
2002 – 2005 Affiliate Faculty, School of Renewable Natural Resources, LSU
1992 - 2002 Research Ecologist, U.S. Geological Survey, Biological Division
1990 - 1993 Professor, Department of Botany, Louisiana State University
1985 - 1990 Associate Professor, Department of Botany, Louisiana State Univ.
1989 Visiting Professor, Louisiana Universities Marine Consortium
1986 Visiting Scientist, Div. Wildlife, CSIRO, Darwin, Australia
1980‑1985 Assistant Professor, Dept. Botany and Microbiology, Univ. Arkansas summer
After graduate school, he held faculty positions at the University of Arkansas and Louisiana State University, where he reached the level of Full Professor. In 2000, he received the millennium Meritorious Research Award from the Society of Wetland Scientists and in 2003 received the National Science Excellence Award from the U.S. Geological Survey. He was selected to be a Fellow of the Ecological Society of America and promoted to the Senior Scientist ranks in 2014. Since 2019 he has been designated as a ‘Highly-Cited Researcher’ by the Web of Science in recognition of his scientific impact during the past decade. In 2021 he received the Presidential Rank Award, which is given out by the President of the United States and is the highest performance award given to career senior scientists and administrators. He has published over 200 papers and reports, including 3 books, one on competitive interactions, one on community analysis, and one on structural equation modeling. As of 2020, Grace has given over 200 invited lectures and workshops in 9 countries during his career.
For more information, search 'Jim Grace USGS'.
Education and Certifications
Ph.D., Michigan State University
M.S., Clemson University
B.S., Biology, Presbyterian College
Science and Products
Effects of nutrients and hydroperiod on Typha, Cladium, and Eleocharis: Implications for everglades restoration
On the relationship between plant species diversity and biomass: A comment on a paper by Gough, Grace and Taylor
In search of the Holy Grail: Explanations for the coexistence of plant species
Disturbance and recovery of the Louisiana coastal marsh landscape from the impacts of Hurricane Andrew
The effects of vertebrate herbivory on plant community structure in the coastal marshes of the Pearl River, Louisiana, USA
The interactive effects of herbivory and fire on an oligohaline marsh, Little Lake, Louisiana, USA
The relationship between species richness and community biomass: The importance of environmental variables
The examination of a competition matrix for transitivity and intransitive loops
The effects of habitat productivity on competition intensity
Size bias in traditional analyses of substitutive competition experiments
Plant community structure in an oligohaline tidal marsh
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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 interstincta (EleAuthorsS. Newman, James B. Grace, J. W. KoebelOn the relationship between plant species diversity and biomass: A comment on a paper by Gough, Grace and Taylor
No abstract available.AuthorsR. H. Marrs, James B. Grace, L. GoughIn search of the Holy Grail: Explanations for the coexistence of plant species
No abstracts available.AuthorsJames B. GraceDisturbance 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, thick sedimAuthorsGlenn R. Guntenspergen, Donald R. Cahoon, James B. Grace, Gregory D. Steyer, Stephen Fournet, M. A. Townson, A. Lee FooteThe effects of vertebrate herbivory on plant community structure in the coastal marshes of the Pearl River, Louisiana, USA
In this study, we investigated the impacts of herbivory by the introduced aquatic herbivore, nutria (Myocastor coypus), on three marsh communities of the Pearl River using fenced exclosures and control plots. Although total community above-ground biomass was reduced by 30% in the plots exposed to herbivory as compared to those protected from herbivory, we found species richness to be unaffected. WAuthorsK.L. Taylor, J.B. GraceThe interactive effects of herbivory and fire on an oligohaline marsh, Little Lake, Louisiana, USA
Herbivory and fire have been shown to affect the structure and composition of marsh communities. Because fire may alter plant species composition and cover, and these alterations may have an effect on herbivore populations or foraging patterns, an interactive effect of herbivory and fire may be expected. In this study, the effects of fire and vertebrate herbivory in a Louisiana oligohaline marsh wAuthorsK.L. Taylor, J.B. Grace, G.R. Guntenspergen, A.L. FooteThe relationship between species richness and community biomass: The importance of environmental variables
Several studies have used plant community biomass to predict species richness with varying success. In this study we examined the relationship between species richness and biomass for 36 marsh communities from two different watersheds. In addition, we measured several environmental variables and estimated the potential richness (the total number of species known to be able to occur in a communityAuthorsL. Gough, J.B. Grace, K.L. TaylorThe examination of a competition matrix for transitivity and intransitive loops
Recent examinations of competition matrices for transitivity (species A > species B > species C) have used techniques that can be subject to certain biases. First, recent theoretical and empirical analyses have shown that traditional measures of competitive performance are biased in favor of the larger species. It is argued that this size bias has the potential to bias analyses of transitivity. SeAuthorsJames B. Grace, Glenn R. Guntenspergen, Janet R. KeoughThe effects of habitat productivity on competition intensity
No abstract available.AuthorsJames B. GraceSize bias in traditional analyses of substitutive competition experiments
The objective of this study was to examine the claim that traditional measures of competitive performance in substitutive experiments are biased towards larger plants. Results from a three-year diallele experiment of 6 marsh plant species were analyzed using both Relative Yields (a traditional analysis) and the Relative Efficiency Index (a recently proposed analysis presumed to be size-independentAuthorsJames B. Grace, Janet R. Keough, Glenn R. GuntenspergenPlant community structure in an oligohaline tidal marsh
An oligohaline tidal marsh on the northern shore of Lake Pontchartrain, LA was characterized with respect to the distributions and abundances of plant species over spatial and temporal gradients using Detrended Correspondence Analysis (DCA). In addition, the species distributions were correlated to several physical environmental factors using Detrended Canonical Correspondence Analysis (DCCA). TheAuthorsJ.S. Brewer, J.B. Grace - News