EagleDashboard: Assessing the population scale impacts of a disease, toxin, or contaminant in Bald Eagles
Hanley, Brenda; Dhondt, André; Forzán, María; Bunting, Elizabeth; Pokras, Mark; Hynes, Kevin; Dominguez-Villegas, Ernesto; Schuler, Krysten
Over the past three decades, bald eagle populations in the United States have largely rebounded from their brush with near extirpation. Although DDT was banned, eagles were listed on the ESA, and their numbers reversed to the strong increase we observe today, human-sourced contaminants remain. One such contaminant is lead (Pb) which remains available to all scavenging wildlife when Pb ammunition is used in legal big game hunting. This interactive dashboard was developed to provide a tool that managers and stakeholders could use to identify the population scale impacts of lead (Pb) to bald eagles over the past three decades in their region of interest. The computations mirror those found in Hanley et al. 2019 and 202X but allow managers to input their own time series counts of demographic and necropsy data. Comparative demographic quantities include the annual abundances, bi-annual abundances, growth rates (asymptotic, transient, cumulative, and stochastic), stable stage distribution, reproductive value, elasticities, and inertia. The app is pre-programmed with the data to compare a population of bald eagles with and without Pb toxicosis in the northeast United States (Hanley et al. 202X), but the software may be modified to assess the population scale impact of other diseases, toxins, or contaminants from mortality counts of adults in other bald eagle populations.
This software is being shared under a MIT license. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
This study was funded in part by the Morris Animal Foundation under Grant # D18ZO-103. This software has not been reviewed nor endorsed by the Foundation, and the views expressed in this software do not necessarily reflect the views of the Foundation, its officers, directors, affiliates, or agents.
Lefkovich matrix; lead; recovery; resource management
Hanley, B, Dhondt, A, Forzán, M, Bunting, E, Pokras, M, Hynes, K, Domínguez-Villegas, E, & Schuler, K. 202X. Environmental Lead Reduces The Resilience Of Bald Eagle Populations (Haliaeetus Leucocephalus). In peer review.Hanley, B, Dhondt, A, Dennis, B, & Schuler, K. 2019. Using time series data to assess recent population dynamics of Bald Eagles in the northeast United States. Ecosphere. doi: https://doi.org/10.1002/ecs2.2963