NYClosedCounterPOPd V2 Web Interactive: Software to investigate the population scale impacts of lead in New York State from 1990-2018

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The NYClosedCounterPOPdV2 software is an interactive application used to explore the differences in population dynamics in the presence and absence of lead (Pb) in bald eagles in New York State between 1990 and 2018 under conditions closed to dispersal. Comparisons include a factual Pb scenario (“Actual”), a counter factual scenario where Pb poisoning cases did not exist (“Pb-reduced”), and counter factual scenario where Pb exposure cases did not exist (“Pb-free”). All data was collected by the New York State Department of Environmental Conservation, and these data collapse via an algorithm into several comparative population scale properties, including the life tables, annual abundances (January – December), bi-annual abundances (January – June and July – December), bi-annual hatchling abundances, bi-annual immature and non-breeder adult abundances, bi-annual breeder abundances, abundances during the breeding periods (January – June), abundances during the non-breeding periods (July – December), migration and dispersal values, lambda values, survival rates, stable stage distributions, reproductive values, elasticities, cumulative growth rates, stochastic growth rates, transient growth rates, reactivity, maximum amplifications, and maximum attenuations (Caswell 2001). The summarized data appears for immediate use in this packet. The raw data may be obtained by contacting the Wildlife Health Unit at the New York State Department of Environmental Conservation [ or (518) 478-2203].

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This software is 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 and in part by the New York State Department of Environmental Conservation. This software has not been reviewed nor endorsed by the Foundation nor the Department, and the views expressed in this software do not necessarily reflect the views of the funders, their officers, directors, affiliates, or agents.

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Lefkovitch matrix; recovery; resource management


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Hanley, B.J., Them, C.E., Connelly, P.J., Hynes, K.P., Bunting, E.M., & Schuler, K.L. 2022. NYCounterPOPd Version 2 [Software]. Cornell University Library eCommons Repository. DOI:

Them, C.E., Hanley, B.J., Connelly, P.J., Hynes, K.P., Bunting, E.M., & Schuler, K.L. 2023. NYDensiPOPd Version 2 [Software]. Cornell University Library eCommons Repository. DOI:

Hanley, B.J., Them, C.E., Hynes, K.P., Connelly, P.J., Bunting, E.M., & Schuler, K.L. Population impact to bald eagles by ingested lead (Pb) in New York State, 1990-2018. In review.

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Now showing 1 - 2 of 2
2023-03-02 16:23:17
Small changes to address reviewer feedback. See Readme document for full change log.
2020-08-14 16:26:17
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