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Estimating relative risk of within-lake aquatic plant invasion using combined measures of recreational boater movement and habitat suitability

Effective monitoring, prevention and impact mitigation of nonindigenous aquatic species relies upon the ability to predict dispersal pathways and receiving habitats with the greatest risk of establishment. To examine mechanisms affecting species establishment within a large lake, we combined observa...

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Autores principales: Wittmann, Marion E., Kendall, Bruce E., Jerde, Christopher L., Anderson, Lars W.J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4369337/
https://www.ncbi.nlm.nih.gov/pubmed/25802813
http://dx.doi.org/10.7717/peerj.845
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author Wittmann, Marion E.
Kendall, Bruce E.
Jerde, Christopher L.
Anderson, Lars W.J.
author_facet Wittmann, Marion E.
Kendall, Bruce E.
Jerde, Christopher L.
Anderson, Lars W.J.
author_sort Wittmann, Marion E.
collection PubMed
description Effective monitoring, prevention and impact mitigation of nonindigenous aquatic species relies upon the ability to predict dispersal pathways and receiving habitats with the greatest risk of establishment. To examine mechanisms affecting species establishment within a large lake, we combined observations of recreational boater movements with empirical measurements of habitat suitability represented by nearshore wave energy to assess the relative risk of Eurasian watermilfoil (Myriophyllum spicatum) establishment. The model was evaluated using information from a 17 year (1995–2012) sequence of M. spicatum presence and absence monitoring. M. spicatum presence was not specifically correlated with recreational boater movements; however its establishment appears to be limited by wave action in Lake Tahoe. Of the sites in the “High” establishment risk category (n = 37), 54% had current or historical infestations, which included 8 of the 10 sites with the highest relative risk. Of the 11 sites in the “Medium” establishment risk category, 5 had current or historical M. spicatum populations. Most (76%) of the sites in the “Low” establishment risk category were observed in locations with higher wave action. Four sites that received zero boater visits from infested locations were occupied by M. spicatum. This suggests that the boater survey either represents incomplete coverage of boater movement, or other processes, such as the movement of propagules by surface currents or introductions from external sources are important to the establishment of this species. This study showed the combination of habitat specific and dispersal data in a relative risk framework can potentially reduce uncertainty in estimates of invasion risk.
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spelling pubmed-43693372015-03-23 Estimating relative risk of within-lake aquatic plant invasion using combined measures of recreational boater movement and habitat suitability Wittmann, Marion E. Kendall, Bruce E. Jerde, Christopher L. Anderson, Lars W.J. PeerJ Conservation Biology Effective monitoring, prevention and impact mitigation of nonindigenous aquatic species relies upon the ability to predict dispersal pathways and receiving habitats with the greatest risk of establishment. To examine mechanisms affecting species establishment within a large lake, we combined observations of recreational boater movements with empirical measurements of habitat suitability represented by nearshore wave energy to assess the relative risk of Eurasian watermilfoil (Myriophyllum spicatum) establishment. The model was evaluated using information from a 17 year (1995–2012) sequence of M. spicatum presence and absence monitoring. M. spicatum presence was not specifically correlated with recreational boater movements; however its establishment appears to be limited by wave action in Lake Tahoe. Of the sites in the “High” establishment risk category (n = 37), 54% had current or historical infestations, which included 8 of the 10 sites with the highest relative risk. Of the 11 sites in the “Medium” establishment risk category, 5 had current or historical M. spicatum populations. Most (76%) of the sites in the “Low” establishment risk category were observed in locations with higher wave action. Four sites that received zero boater visits from infested locations were occupied by M. spicatum. This suggests that the boater survey either represents incomplete coverage of boater movement, or other processes, such as the movement of propagules by surface currents or introductions from external sources are important to the establishment of this species. This study showed the combination of habitat specific and dispersal data in a relative risk framework can potentially reduce uncertainty in estimates of invasion risk. PeerJ Inc. 2015-03-19 /pmc/articles/PMC4369337/ /pubmed/25802813 http://dx.doi.org/10.7717/peerj.845 Text en © 2015 Wittmann et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Conservation Biology
Wittmann, Marion E.
Kendall, Bruce E.
Jerde, Christopher L.
Anderson, Lars W.J.
Estimating relative risk of within-lake aquatic plant invasion using combined measures of recreational boater movement and habitat suitability
title Estimating relative risk of within-lake aquatic plant invasion using combined measures of recreational boater movement and habitat suitability
title_full Estimating relative risk of within-lake aquatic plant invasion using combined measures of recreational boater movement and habitat suitability
title_fullStr Estimating relative risk of within-lake aquatic plant invasion using combined measures of recreational boater movement and habitat suitability
title_full_unstemmed Estimating relative risk of within-lake aquatic plant invasion using combined measures of recreational boater movement and habitat suitability
title_short Estimating relative risk of within-lake aquatic plant invasion using combined measures of recreational boater movement and habitat suitability
title_sort estimating relative risk of within-lake aquatic plant invasion using combined measures of recreational boater movement and habitat suitability
topic Conservation Biology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4369337/
https://www.ncbi.nlm.nih.gov/pubmed/25802813
http://dx.doi.org/10.7717/peerj.845
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