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Open AccessArticle

Assessing Niche Shifts and Conservatism by Comparing the Native and Post-Invasion Niches of Major Forest Invasive Species

1
Department of Forest Resources Management, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
2
Center for Geospatial Analytics, North Carolina State University, Raleigh, NC 27695, USA
3
Northern Research Station, USDA Forest Service, Hamden, CT 06514, USA
4
Great Lakes Forestry Center, Natural Resources Canada, Sault Ste. Marie, ON P6A 2E5, Canada
5
Department of Forest and Conservation Sciences, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
*
Author to whom correspondence should be addressed.
Insects 2020, 11(8), 479; https://doi.org/10.3390/insects11080479
Received: 6 July 2020 / Revised: 20 July 2020 / Accepted: 25 July 2020 / Published: 29 July 2020
(This article belongs to the Special Issue Ecology and Management of Invasive Insects in Forest Ecosystems)
Invasive species experience biotic and abiotic conditions that may (or may not) resemble their native environment. We explored the methodology of determining climatic niches and compared the native and post-invasion niches of four invasive forest pests to determine if these species experienced shifts or changes in their new climatic niches. We used environmental principle components analysis (PCA-env) method to quantify climatic niche shifts, expansions, and temporal changes. Furthermore, we assessed the effect of variable selection in the delineation and comparison of niche space. We found that variable selection influenced the delineation and overlap of each niche, whereas the subset of climatic variables selected from the first two PCA-env axes explained more variance in environmental conditions than the complete set of climatic variables for all four species. Most focal species showed climatic niche shifts in their invasive range and had not yet fully occupied the available niche within the invaded range. Our species varied the proportion of niche overlap between the native and invasive ranges. By comparing native and invasive niches, we can help predict a species’ potential range expansion and invasion potential. Our results can guide monitoring and help inform management of these and other invasive species. View Full-Text
Keywords: niche conservatism; niche shift; invasive species; Anoplophora glabripennis; Sirex noctilio; Ophiostoma ulmi; Ophiostoma novo-ulmi; Phytophthora ramorum niche conservatism; niche shift; invasive species; Anoplophora glabripennis; Sirex noctilio; Ophiostoma ulmi; Ophiostoma novo-ulmi; Phytophthora ramorum
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MDPI and ACS Style

Srivastava, V.; Liang, W.; Keena, M.A.; Roe, A.D.; Hamelin, R.C.; Griess, V.C. Assessing Niche Shifts and Conservatism by Comparing the Native and Post-Invasion Niches of Major Forest Invasive Species. Insects 2020, 11, 479. https://doi.org/10.3390/insects11080479

AMA Style

Srivastava V, Liang W, Keena MA, Roe AD, Hamelin RC, Griess VC. Assessing Niche Shifts and Conservatism by Comparing the Native and Post-Invasion Niches of Major Forest Invasive Species. Insects. 2020; 11(8):479. https://doi.org/10.3390/insects11080479

Chicago/Turabian Style

Srivastava, Vivek; Liang, Wanwan; Keena, Melody A.; Roe, Amanda D.; Hamelin, Richard C.; Griess, Verena C. 2020. "Assessing Niche Shifts and Conservatism by Comparing the Native and Post-Invasion Niches of Major Forest Invasive Species" Insects 11, no. 8: 479. https://doi.org/10.3390/insects11080479

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