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
Host mating system and the prevalence of a disease in a plant population
Emergence of ratio-dependent and predator-dependent functional responses for pollination mutualism and seed parasitism
Multimodeling: new approaches for linking ecological models
Individual-based modeling of ecological and evolutionary processes
Pattern-oriented modeling of agent-based complex systems: Lessons from ecology
Artificial neural networks and ecological communities (Book Review: Modelling community structure in freshwater ecosystems)
Life history trade-offs and community dynamics of small fishes in a seasonally pulsed wetland
Inducible defenses in food webs: Chapter 3.4
Evaluating the effect of salinity on a simulated American Crocodile (Crocodylus acutus) population with applications to conservation and Everglades restoration
Evolutionary stability of mutualism: interspecific population regulation as an evolutionarily stable strategy
The effects of mixotrophy on the stability and dynamics of a simple planktonic food web
Testing hypotheses for excess flower production and low fruit-to-flower ratios in a pollinating seed-consuming mutualism
Science and Products
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Filter Total Items: 188
Host mating system and the prevalence of a disease in a plant population
A modified susceptible–infected–recovered (SIR) host–pathogen model is used to determine the influence of plant mating system on the outcome of a host–pathogen interaction. Unlike previous models describing how interactions between mating system and pathogen infection affect individual fitness, this model considers the potential consequences of varying mating systems on the prevalence of resistancAuthorsJennifer M. Koslow, Donald L. DeAngelisEmergence of ratio-dependent and predator-dependent functional responses for pollination mutualism and seed parasitism
Prey (N) dependence [g(N)], predator (P) dependence [g(P) or g(N,P)], and ratio dependence [f(P/N)] are often seen as contrasting forms of the predator's functional response describing predator consumption rates on prey resources in predator–prey and parasitoid–host interactions. Analogously, prey-, predator-, and ratio-dependent functional responses are apparently alternative functional responsesAuthorsDonald L. DeAngelis, J. Nathaniel HollandMultimodeling: new approaches for linking ecological models
The Everglades region of South Florida presents one of the major natural system management challenges facing the United States. With its assortment of alligators, crocodiles, manatees, panthers, large mixed flocks of wading birds, highly diverse subtropical flora, and sea of sawgrass, the ecosystem is unique in this country (Davis and Ogden 1994). The region is also perhaps the largest human-conAuthorsLouis J. Gross, Donald L. DeAngelisIndividual-based modeling of ecological and evolutionary processes
Individual-based models (IBMs) allow the explicit inclusion of individual variation in greater detail than do classical differential-equation and difference-equation models. Inclusion of such variation is important for continued progress in ecological and evolutionary theory. We provide a conceptual basis for IBMs by describing five major types of individual variation in IBMs: spatial, ontogeneticAuthorsDonald L. DeAngelis, Wolf M. MooijPattern-oriented modeling of agent-based complex systems: Lessons from ecology
Agent-based complex systems are dynamic networks of many interacting agents; examples include ecosystems, financial markets, and cities. The search for general principles underlying the internal organization of such systems often uses bottom-up simulation models such as cellular automata and agent-based models. No general framework for designing, testing, and analyzing bottom-up models has yet beeAuthorsVolker Grimm, Eloy Revilla, Uta Berger, Florian Jeltsch, Wolf M. Mooij, Steven F. Railsback, Hans-Hermann Thulke, Jacob Weiner, Thorsten Wiegand, Donald L. DeAngelisArtificial neural networks and ecological communities (Book Review: Modelling community structure in freshwater ecosystems)
No abstract available Review info: Modeling community structure in freshwater ecosystems. Edited by Sovan Lek, Michele Scardi, Piet F.M. Verdonschot, Jean-Pierre Descy, and Young-Seuk Park, 2005. ISBN: 3-540-23940-5, 518 pp.AuthorsDonald L. DeAngelisLife history trade-offs and community dynamics of small fishes in a seasonally pulsed wetland
We used a one-dimensional, spatially explicit model to simulate the community of small fishes in the freshwater wetlands of southern Florida, USA. The seasonality of rainfall in these wetlands causes annual fluctuations in the amount of flooded area. We modeled fish populations that differed from each other only in efficiency of resource utilization and dispersal ability. The simulations showed thAuthorsD.L. DeAngelis, J.C. Trexler, W.F. LoftusInducible defenses in food webs: Chapter 3.4
This chapter reviews the predicted effects of induced defenses on trophic structure and two aspects of stability, “local” stability and persistence, as well as presenting novel results on a third, resilience. Food webs are structures of populations in a given location organized according to their predator–prey interactions. Interaction strengths and, therefore, prey defenses are generally recognizAuthorsMatthijs Vos, Bob W. Kooi, Donald L. DeAngelis, Wolf M. MooijEvaluating the effect of salinity on a simulated American Crocodile (Crocodylus acutus) population with applications to conservation and Everglades restoration
Everglades restoration will alter the hydrology of South Florida, affecting both water depth and salinity levels in the southern fringes of the Everglades, the habitat of the endangered American crocodile (Crocodylus acutus). A key question is what the effects of these hydrologic changes will be on the crocodile population. Reliable predictions of the viability of endangered species under a varietAuthorsPaul M. Richards, Wolf M. Mooij, Donald L. DeAngelisEvolutionary stability of mutualism: interspecific population regulation as an evolutionarily stable strategy
Interspecific mutualisms are often vulnerable to instability because low benefit : cost ratios can rapidly lead to extinction or to the conversion of mutualism to parasite–host or predator–prey interactions. We hypothesize that the evolutionary stability of mutualism can depend on how benefits and costs to one mutualist vary with the population density of its partner, and that stability can be maiAuthorsJ. Nathaniel Holland, Donald L. DeAngelis, Stewart T. SchultzThe effects of mixotrophy on the stability and dynamics of a simple planktonic food web
Recognition of the microbial loop as an important part of aquatic ecosystems disrupted the notion of simple linear food chains. However, current research suggests that even the microbial loop paradigm is a gross simplification of microbial interactions due to the presence of mixotrophs—organisms that both photosynthesize and graze. We present a simple food web model with four trophic species, threAuthorsChristian Jost, Cathryn A. Lawrence, Francesca Campolongo, van de Bund Wouter, Sheryl Hill, Donald L. DeAngelisTesting hypotheses for excess flower production and low fruit-to-flower ratios in a pollinating seed-consuming mutualism
Pollinator attraction, pollen limitation, resource limitation, pollen donation and selective fruit abortion have all been proposed as processes explaining why hermaphroditic plants commonly produce many more flowers than mature fruit. We conducted a series of experiments in Arizona to investigate low fruit-to-flower ratios in senita cacti, which rely exclusively on pollinating seed-consumers. SeleAuthorsJ. Nathaniel Holland, Judith L. Bronstein, Donald L. DeAngelis - News