Science and Products
PopEquus: a predictive modeling tool to support management decisions for free-roaming horse populations
Feral horse (Equus caballus) population management is a challenging problem around the world because populations often exhibit density-independent growth, can exert negative ecological effects on ecosystems, and require great cost to be managed. However, strong value-based connections between people and horses cause contention around management decisions. To help make informed decisions, natural r
Authors
Brian Patrick Folt, Kathryn A. Schoenecker, L. Stefan Ekernas, David R. Edmunds, Mark T. Hannon
Multi-objective modeling as a decision-support tool for free-roaming horse management
Decisions related to controversial problems in natural resource management receive the greatest support when they account for multiple objectives of stakeholders in a structured and transparent fashion. In the United States, management of free-roaming horses (Equus caballus; horses) is a controversial multiple-objective problem because disparate stakeholder groups have varying objectives and opini
Authors
Brian Patrick Folt, Kathryn A. Schoenecker, L. Stefan Ekernas
Interdrainage morphological and genetic differentiation in the Escambia Map Turtle, Graptemys ernsti
Graptemys ernsti, the Escambia Map Turtle, inhabits the Escambia/Conecuh River, the adjacent Yellow River, and the Pea River further to the east, all of which have been distinct drainage systems since the Pleistocene. We used continuous and meristic morphological and genetic data to compare populations of G. ernsti and found evidence of differences among the three drainages. Frequency of occurrenc
Authors
Joshua R. Ennen, James Godwin, Jeffrey E. Lovich, Brian R. Kreiser, Brian Folt, Sarah Hazard
Hybridization of two megacephalic map turtles (testudines: emydidae: Graptemys) in the Choctawhatchee River drainage of Alabama and Florida
Map turtles of the genus Graptemys are highly aquatic and rarely undergo terrestrial movements, and limited dispersal among drainages has been hypothesized to drive drainage-specific endemism and high species richness of this group in the southeastern United States. Until recently, two members of the megacephalic “pulchra clade,” Graptemys barbouri andGraptemys ernsti, were presumed to be allopatr
Authors
James Godwin, Jeffrey E. Lovich, Joshua R. Ennen, Brian R. Kreiser, Brian Folt, Chris Lechowicz
Scenario Analysis of Management Alternatives for Free-roaming Horse Populations (Version 1.0.0)
PopEquus is a predictive modeling tool to support decisions related to the management of free-roaming horse populations. It permits the simulation and comparison of how management alternatives influence horse population size and metrics associated with management. This repository uses R scripts with predictive functions from the PopEquus model to simulate how management alternatives (e.g., removin
PopEquus: A Predictive Modeling Tool to Support Management Decisions for Free-roaming Horse Populations, Version 1.0.1
PopEquus is a website application that can be used to understand trade-offs and inform decisions in free-roaming horse (Equus caballus) population management. The application (https://rconnect.usgs.gov/popequus/) contains a predictive population modeling tool that can be used to simulate how different management actions drive changes in horse population size, while measuring management costs and o
Multi-objective Modeling as a Decision-support Tool for Feral Horse Management
Decisions related to controversial problems in natural resource management receive the greatest support when they account for multiple objectives of stakeholders in a structured and transparent fashion. In the United States, management of feral horses (Equus caballus) is a controversial multi-objective problem because disparate stakeholder groups have varying objectives and opinions about how to m
Science and Products
- Publications
PopEquus: a predictive modeling tool to support management decisions for free-roaming horse populations
Feral horse (Equus caballus) population management is a challenging problem around the world because populations often exhibit density-independent growth, can exert negative ecological effects on ecosystems, and require great cost to be managed. However, strong value-based connections between people and horses cause contention around management decisions. To help make informed decisions, natural rAuthorsBrian Patrick Folt, Kathryn A. Schoenecker, L. Stefan Ekernas, David R. Edmunds, Mark T. HannonMulti-objective modeling as a decision-support tool for free-roaming horse management
Decisions related to controversial problems in natural resource management receive the greatest support when they account for multiple objectives of stakeholders in a structured and transparent fashion. In the United States, management of free-roaming horses (Equus caballus; horses) is a controversial multiple-objective problem because disparate stakeholder groups have varying objectives and opiniAuthorsBrian Patrick Folt, Kathryn A. Schoenecker, L. Stefan EkernasInterdrainage morphological and genetic differentiation in the Escambia Map Turtle, Graptemys ernsti
Graptemys ernsti, the Escambia Map Turtle, inhabits the Escambia/Conecuh River, the adjacent Yellow River, and the Pea River further to the east, all of which have been distinct drainage systems since the Pleistocene. We used continuous and meristic morphological and genetic data to compare populations of G. ernsti and found evidence of differences among the three drainages. Frequency of occurrencAuthorsJoshua R. Ennen, James Godwin, Jeffrey E. Lovich, Brian R. Kreiser, Brian Folt, Sarah HazardHybridization of two megacephalic map turtles (testudines: emydidae: Graptemys) in the Choctawhatchee River drainage of Alabama and Florida
Map turtles of the genus Graptemys are highly aquatic and rarely undergo terrestrial movements, and limited dispersal among drainages has been hypothesized to drive drainage-specific endemism and high species richness of this group in the southeastern United States. Until recently, two members of the megacephalic “pulchra clade,” Graptemys barbouri andGraptemys ernsti, were presumed to be allopatrAuthorsJames Godwin, Jeffrey E. Lovich, Joshua R. Ennen, Brian R. Kreiser, Brian Folt, Chris Lechowicz - Software
Scenario Analysis of Management Alternatives for Free-roaming Horse Populations (Version 1.0.0)
PopEquus is a predictive modeling tool to support decisions related to the management of free-roaming horse populations. It permits the simulation and comparison of how management alternatives influence horse population size and metrics associated with management. This repository uses R scripts with predictive functions from the PopEquus model to simulate how management alternatives (e.g., removinPopEquus: A Predictive Modeling Tool to Support Management Decisions for Free-roaming Horse Populations, Version 1.0.1
PopEquus is a website application that can be used to understand trade-offs and inform decisions in free-roaming horse (Equus caballus) population management. The application (https://rconnect.usgs.gov/popequus/) contains a predictive population modeling tool that can be used to simulate how different management actions drive changes in horse population size, while measuring management costs and oMulti-objective Modeling as a Decision-support Tool for Feral Horse Management
Decisions related to controversial problems in natural resource management receive the greatest support when they account for multiple objectives of stakeholders in a structured and transparent fashion. In the United States, management of feral horses (Equus caballus) is a controversial multi-objective problem because disparate stakeholder groups have varying objectives and opinions about how to m