Don DeAngelis, Ph.D.
Don DeAngelis is a Senior Scientist and Research Ecologist at the USGS Wetland and Aquatic Research Center.
RESEARCH
Donald DeAngelis is an ecologist, specializing in mathematical and simulation modeling. He was one of the early developers of individual-based modeling (IBM) in population ecology, and has applied IBM to fish and other populations. Among his other interests are modeling of vegetation succession, nutrient cycling, mutualistic interactions, and food webs. He is coordinator of the Across Trophic Level System Simulation (ATLSS) Program, a multi-project, multi-investigator program with the objective of providing simulation models to assist Everglades restoration.
BACKGROUND
1994-present, Ecologist, U. S. Geological Survey, Biological Resources Division, Florida Caribbean Science Center, Department of Biology, University of Miami, Coral Gables, FL 33124 Research Faculty Associate Professor, Department of Biology, University of Miami
Editor, The American Naturalist, 2004 -present
Editorial Boards
Currently: Ecological Complexity
Previously: Ecosystems, Mathematical Biosciences, Ecology, Ecological Monographs, Nonlier World, Journal of Aquatic Stress and Recovery Awards Fellow of American Association for the Advancement of Science, 1983 Martin Marietta Energy Systems, Inc. Technical Publications Award, 1986 Martin Marietta Energy Systems, Inc. Technical Publications Award, 1987 First Place, 1990 International Technical Publication Competition, sponsored by the Society for Technical Communication Martin Marietta Energy Systems, Inc., Technical Publications Award, 1991
Grants 'Spatial Gradients in Nutrient Recycling and Their Effect on Stream Ecosystem Stability'. National Science Foundation, April 1, 1991 - March 31, 1994, $1,419,019. Co-Principal Investigators, D. L. DeAngelis and P. J. Mulholland
'Compensatory Mechanisms in Fish Populations', Electric Power Research Institute. 1988 - 1996. Approximately $1 million per year. Principal Investigator, W. Van Winkle. D. L.
DeAngelis developed the approach used and wrote the initial funded proposal 'Synthesis of Species-Population Dynamics and Ecosystem Processes: Theoretical Study of the Stability and Development of Food Web Structure'. National Science Foundation, United States - Japan Cooperative Science Program. January 1, 1991 - December 31, 1992.Co-Principal Investigators, E. Teramoto and D. L. DeAngelis. Environmental Sciences Division Scientific Achievement Award for 1982 Areas of Focus Conservation and Restoration Biology Mathematical and Theoretical Biology
Education and Certifications
Ph.D., Engineering and Applied Science (Plasma Physics), Yale University, 1972
B.S., Physics, Massachusetts Institute of Technology, 1966
Science and Products
Plant allocation of carbon to defense as a function of herbivory, light and nutrient availability
Towards a theory of ecotone resilience: coastal vegetation on a salinity gradient
Plant toxins and trophic cascades alter fire regime and succession on a boral forest landscape
Spatial pattern formation of coastal vegetation in response to external gradients and positive feedbacks affecting soil porewater salinity: A model study
Dynamics of a plant-herbivore-predator system with plant-toxicity
Using data from an encounter sampler to model fish dispersal
The effect of travel loss on evolutionarily stable distributions of populations in space
Transitions of interaction outcomes in a uni-directional consumer-resource system
Uni-directional consumer-resource theory characterizing transitions of interaction outcomes
A predator-prey model with a holling type I functional response including a predator mutual interference
Ecological models supporting environmental decision making: A strategy for the future
A consumer-resource approach to the density-dependent population dynamics of mutualism
Science and Products
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Filter Total Items: 188
Plant allocation of carbon to defense as a function of herbivory, light and nutrient availability
We use modeling to determine the optimal relative plant carbon allocations between foliage, fine roots, anti-herbivore defense, and reproduction to maximize reproductive output. The model treats these plant components and the herbivore compartment as variables. Herbivory is assumed to be purely folivory. Key external factors include nutrient availability, degree of shading, and intensity of herbivAuthorsDonald L. DeAngelis, Shu Ju, Rongsong Liu, John P. Bryant, Stephen A. GourleyTowards a theory of ecotone resilience: coastal vegetation on a salinity gradient
Ecotones represent locations where vegetation change is likely to occur as a result of climate and other environmental changes. Using a model of an ecotone vulnerable to such future changes, we estimated the resilience of the ecotone to disturbances. The specific ecotone is that between two different vegetation types, salinity-tolerant and salinity-intolerant, along a gradient in groundwater salinAuthorsJiang Jiang, Daozhou Gao, Donald L. DeAngelisPlant toxins and trophic cascades alter fire regime and succession on a boral forest landscape
Two models were integrated in order to study the effect of plant toxicity and a trophic cascade on forest succession and fire patterns across a boreal landscape in central Alaska. One of the models, ALFRESCO, is a cellular automata model that stochastically simulates transitions from spruce dominated 1 km2 spatial cells to deciduous woody vegetation based on stochastic fires, and from deciduous woAuthorsZhilan Feng, Jorge A. Alfaro-Murillo, Donald L. DeAngelis, Jennifer Schmidt, Matthew Barga, Yiqiang Zheng, Muhammad Hanis B. Ahmad Tamrin, Mark Olson, Tim Glaser, Knut Kielland, F. Stuart Chapin, John BryantSpatial pattern formation of coastal vegetation in response to external gradients and positive feedbacks affecting soil porewater salinity: A model study
Coastal vegetation of South Florida typically comprises salinity-tolerant mangroves bordering salinity-intolerant hardwood hammocks and fresh water marshes. Two primary ecological factors appear to influence the maintenance of mangrove/hammock ecotones against changes that might occur due to disturbances. One of these is a gradient in one or more environmental factors. The other is the action of pAuthorsJ. Jiang, Donald L. DeAngelis, T. J. Smith, S.Y. Teh, H. L. KohDynamics of a plant-herbivore-predator system with plant-toxicity
A system of ordinary differential equations is considered that models the interactions of two plant species populations, an herbivore population, and a predator population. We use a toxin-determined functional response to describe the interactions between plant species and herbivores and use a Holling Type II functional response to model the interactions between herbivores and predators. In orderAuthorsZhilan Feng, Zhipeng Qiu, Rongsong Liu, Donald L. DeAngelisUsing data from an encounter sampler to model fish dispersal
A method to estimate speed of free-ranging fishes using a passive sampling device is described and illustrated with data from the Everglades, U.S.A. Catch per unit effort (CPUE) from minnow traps embedded in drift fences was treated as an encounter rate and used to estimate speed, when combined with an independent estimate of density obtained by use of throw traps that enclose 1 m2 of marsh habitaAuthorsA. Obaza, D.L. DeAngelis, J.C. TrexlerThe effect of travel loss on evolutionarily stable distributions of populations in space
A key assumption of the ideal free distribution (IFD) is that there are no costs in moving between habitat patches. However, because many populations exhibit more or less continuous population movement between patches and traveling cost is a frequent factor, it is important to determine the effects of costs on expected population movement patterns and spatial distributions. We consider a food chaiAuthorsDonald L. DeAngelis, G.S.K. Wolkowicz, Y. Lou, Y. Jiang, M. Novak, R. Svanback, M.S. Araujo, Y.S. Jo, E.A. ClearyTransitions of interaction outcomes in a uni-directional consumer-resource system
A uni-directional consumer–resource system of two species is analyzed. Our aim is to understand the mechanisms that determine how the interaction outcomes depend on the context of the interaction; that is, on the model parameters. The dynamic behavior of the model is described and, in particular, it is demonstrated that no periodic orbits exist. Then the parameter (factor) space is shown to be divAuthorsY. Wang, Donald L. DeAngelisUni-directional consumer-resource theory characterizing transitions of interaction outcomes
A resource is considered here to be a biotic population that helps to maintain the population growth of its consumers, whereas a consumer utilizes a resource and in turn decreases its growth rate. Bi-directional consumer–resource (C–R) interactions have been the object of recent theory. In these interactions, each species acts, in some respects, as both a consumer and a resource of the other, whicAuthorsY. Wang, D.L. DeAngelis, J.N. HollandA predator-prey model with a holling type I functional response including a predator mutual interference
The most widely used functional response in describing predator-prey relationships is the Holling type II functional response, where per capita predation is a smooth, increasing, and saturating function of prey density. Beddington and DeAngelis modified the Holling type II response to include interference of predators that increases with predator density. Here we introduce a predator-interferenceAuthorsG. Seo, D.L. DeAngelisEcological models supporting environmental decision making: A strategy for the future
Ecological models are important for environmental decision support because they allow the consequences of alternative policies and management scenarios to be explored. However, current modeling practice is unsatisfactory. A literature review shows that the elements of good modeling practice have long been identified but are widely ignored. The reasons for this might include lack of involvement ofAuthorsAmelie Schmolke, Pernille Thorbek, Donald L. DeAngelis, Volker GrimmA consumer-resource approach to the density-dependent population dynamics of mutualism
Like predation and competition, mutualism is now recognized as a consumer resource (C-R) interaction, including, in particular, bi-directional (e.g., coral, plant- mycorrhizae) and uni-directional (e.g., ant-plant defense, plant-pollinator) C-R mutualisms. Here, we develop general theory for the density-dependent population dynamics of mutualism based on the C-R mechanism of interspecific interactAuthorsJ. Nathaniel Holland, Donald L. DeAngelis - News