Don DeAngelis, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 195
Ecological and evolutionary conditions for fruit abortion to regulate pollinating seed-eaters and increase plant production Ecological and evolutionary conditions for fruit abortion to regulate pollinating seed-eaters and increase plant production
Coevolved mutualisms, such as those between senita cacti, yuccas, and their respective obligate pollinators, benefit both species involved in the interaction. However, in these pollination mutualisms the pollinator's larvae impose a cost on plants through consumption of developing seeds and fruit. The effects of pollinators on benefits and costs are expected to vary with the abundance of
Authors
J. Nathaniel Holland, Donald L. DeAngelis
Population dynamics and mutualism: Functional responses of benefits and costs Population dynamics and mutualism: Functional responses of benefits and costs
We develop an approach for studying population dynamics resulting from mutualism by employing functional responses based on density‐dependent benefits and costs. These functional responses express how the population growth rate of a mutualist is modified by the density of its partner. We present several possible dependencies of gross benefits and costs, and hence net effects, to a...
Authors
J. Nathaniel Holland, Donald L. DeAngelis, Judith L. Bronstein
Exploring the effect of drought extent and interval on the Florida snail kite: Interplay between spatial and temporal scales Exploring the effect of drought extent and interval on the Florida snail kite: Interplay between spatial and temporal scales
The paper aims at exploring the viability of the Florida snail kite population under various drought regimes in its wetland habitat. The population dynamics of snail kites are strongly linked with the hydrology of the system due to the dependence of this bird species on one exclusive prey species, the apple snail, which is negatively affected by a drying out of habitat. Based on...
Authors
Wolf M. Mooij, Robert E. Bennetts, Wiley M. Kitchens, Donald L. DeAngelis
Structural instability, multiple stable states, and hysteresis in periphyton driven by phosphorus enrichment in the Everglades Structural instability, multiple stable states, and hysteresis in periphyton driven by phosphorus enrichment in the Everglades
Periphyton is a key component of the Everglades ecosystems. It is a major primary producer, providing food and habitat for a variety of organisms, contributing material to the surface soil, and regulating water chemistry. Periphyton is sensitive to the phosphorus (P) supply and P enrichment has caused dramatic changes in the native Everglades periphyton assemblages. Periphyton also...
Authors
Quan Dong, Paul V. McCormick, Fred H. Sklar, Donald L. DeAngelis
The use of resighting data to estimate the rate of population growth of the snail kite in Florida The use of resighting data to estimate the rate of population growth of the snail kite in Florida
The rate of population growth (lambda) is an important demographic parameter used to assess the viability of a population and to develop management and conservation agendas. We examined the use of resighting data to estimate lambda for the snail kite population in Florida from 1997-2000. The analyses consisted of (1) a robust design approach that derives an estimate of lambda from...
Authors
V.J. Dreitz, J.D. Nichols, J.E. Hines, R.E. Bennetts, W.M. Kitchens, D.L. DeAngelis
The use of models for a multiscaled ecological monitoring system: Chapter 6 The use of models for a multiscaled ecological monitoring system: Chapter 6
No abstract available
Authors
Donald L. DeAngelis, L.J. Gross, E.J. Comiskey, Wolf M. Mooij, M.P. Nott
Optimal exploitation of spatially distributed trophic resources and population stability Optimal exploitation of spatially distributed trophic resources and population stability
The relationships between optimal foraging of individuals and population stability are addressed by testing, with a spatially explicit model, the effect of patch departure behaviour on individual energetics and population stability. A factorial experimental design was used to analyse the relevance of the behavioural factor in relation to three factors that are known to affect individual...
Authors
A. Basset, M. Fedele, D.L. DeAngelis
Integration of population, community, and landscape indicators for assessing effects of stressors Integration of population, community, and landscape indicators for assessing effects of stressors
Abstract not supplied at this time
Authors
D.L. DeAngelis, J. L. Curnutt
Modeling ecosystem and population dynamics on the South Florida hydroscape Modeling ecosystem and population dynamics on the South Florida hydroscape
Abstract not supplied at this time
Authors
D.L. DeAngelis, S. Bellmund, W.M. Mooij, M.P. Nott, E.J. Comiskey, L.J. Gross, W.M. Wolff
Community food webs Community food webs
Community food webs describe the feeding relationships, or trophic interactions, between the species of an ecological community. Both the structure and dynamics of such webs are the focus of food web research. The topological structures of empirical food webs from many ecosystems have been published on the basis of field studies and they form the foundation for theory concerning the mean...
Authors
Donald L. DeAngelis
Modeling Fish Population and Biomass on the Everglades Landscape (ALFISH) Modeling Fish Population and Biomass on the Everglades Landscape (ALFISH)
ALFISH is a model created under the Across Trophic Level System Simulation (ATLSS) Program of the U.S. Geological Survey (USGS). Its purpose is to describe fish functional groups in freshwater marshes of the greater Everglades area of southern Florida. In particular, it is intended to assess the spatial pattern of fish densities through time across freshwater marshes. This model has the...
Authors
Donald L. DeAngelis, Louis J. Gross, Holly Gaff, Rene Salinas
Science and Products
Filter Total Items: 195
Ecological and evolutionary conditions for fruit abortion to regulate pollinating seed-eaters and increase plant production Ecological and evolutionary conditions for fruit abortion to regulate pollinating seed-eaters and increase plant production
Coevolved mutualisms, such as those between senita cacti, yuccas, and their respective obligate pollinators, benefit both species involved in the interaction. However, in these pollination mutualisms the pollinator's larvae impose a cost on plants through consumption of developing seeds and fruit. The effects of pollinators on benefits and costs are expected to vary with the abundance of
Authors
J. Nathaniel Holland, Donald L. DeAngelis
Population dynamics and mutualism: Functional responses of benefits and costs Population dynamics and mutualism: Functional responses of benefits and costs
We develop an approach for studying population dynamics resulting from mutualism by employing functional responses based on density‐dependent benefits and costs. These functional responses express how the population growth rate of a mutualist is modified by the density of its partner. We present several possible dependencies of gross benefits and costs, and hence net effects, to a...
Authors
J. Nathaniel Holland, Donald L. DeAngelis, Judith L. Bronstein
Exploring the effect of drought extent and interval on the Florida snail kite: Interplay between spatial and temporal scales Exploring the effect of drought extent and interval on the Florida snail kite: Interplay between spatial and temporal scales
The paper aims at exploring the viability of the Florida snail kite population under various drought regimes in its wetland habitat. The population dynamics of snail kites are strongly linked with the hydrology of the system due to the dependence of this bird species on one exclusive prey species, the apple snail, which is negatively affected by a drying out of habitat. Based on...
Authors
Wolf M. Mooij, Robert E. Bennetts, Wiley M. Kitchens, Donald L. DeAngelis
Structural instability, multiple stable states, and hysteresis in periphyton driven by phosphorus enrichment in the Everglades Structural instability, multiple stable states, and hysteresis in periphyton driven by phosphorus enrichment in the Everglades
Periphyton is a key component of the Everglades ecosystems. It is a major primary producer, providing food and habitat for a variety of organisms, contributing material to the surface soil, and regulating water chemistry. Periphyton is sensitive to the phosphorus (P) supply and P enrichment has caused dramatic changes in the native Everglades periphyton assemblages. Periphyton also...
Authors
Quan Dong, Paul V. McCormick, Fred H. Sklar, Donald L. DeAngelis
The use of resighting data to estimate the rate of population growth of the snail kite in Florida The use of resighting data to estimate the rate of population growth of the snail kite in Florida
The rate of population growth (lambda) is an important demographic parameter used to assess the viability of a population and to develop management and conservation agendas. We examined the use of resighting data to estimate lambda for the snail kite population in Florida from 1997-2000. The analyses consisted of (1) a robust design approach that derives an estimate of lambda from...
Authors
V.J. Dreitz, J.D. Nichols, J.E. Hines, R.E. Bennetts, W.M. Kitchens, D.L. DeAngelis
The use of models for a multiscaled ecological monitoring system: Chapter 6 The use of models for a multiscaled ecological monitoring system: Chapter 6
No abstract available
Authors
Donald L. DeAngelis, L.J. Gross, E.J. Comiskey, Wolf M. Mooij, M.P. Nott
Optimal exploitation of spatially distributed trophic resources and population stability Optimal exploitation of spatially distributed trophic resources and population stability
The relationships between optimal foraging of individuals and population stability are addressed by testing, with a spatially explicit model, the effect of patch departure behaviour on individual energetics and population stability. A factorial experimental design was used to analyse the relevance of the behavioural factor in relation to three factors that are known to affect individual...
Authors
A. Basset, M. Fedele, D.L. DeAngelis
Integration of population, community, and landscape indicators for assessing effects of stressors Integration of population, community, and landscape indicators for assessing effects of stressors
Abstract not supplied at this time
Authors
D.L. DeAngelis, J. L. Curnutt
Modeling ecosystem and population dynamics on the South Florida hydroscape Modeling ecosystem and population dynamics on the South Florida hydroscape
Abstract not supplied at this time
Authors
D.L. DeAngelis, S. Bellmund, W.M. Mooij, M.P. Nott, E.J. Comiskey, L.J. Gross, W.M. Wolff
Community food webs Community food webs
Community food webs describe the feeding relationships, or trophic interactions, between the species of an ecological community. Both the structure and dynamics of such webs are the focus of food web research. The topological structures of empirical food webs from many ecosystems have been published on the basis of field studies and they form the foundation for theory concerning the mean...
Authors
Donald L. DeAngelis
Modeling Fish Population and Biomass on the Everglades Landscape (ALFISH) Modeling Fish Population and Biomass on the Everglades Landscape (ALFISH)
ALFISH is a model created under the Across Trophic Level System Simulation (ATLSS) Program of the U.S. Geological Survey (USGS). Its purpose is to describe fish functional groups in freshwater marshes of the greater Everglades area of southern Florida. In particular, it is intended to assess the spatial pattern of fish densities through time across freshwater marshes. This model has the...
Authors
Donald L. DeAngelis, Louis J. Gross, Holly Gaff, Rene Salinas