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Article
Distance to native niche margins explains establishment success of alien mammals
Olivier Broennimann
University of Lausanne
Corresponding Author
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Why do some alien species introductions fail while others are successful? One key hypothesis is that in order for a species to invade a new range, it must initially establish successfully in conditions within its native climatic niche (NCN). Yet, this hypothesis has largely remained untested at the level of individual release events. Using a dataset of 989 introductions of 177 mammal species worldwide, we show that climatic matching to the NCN, measured by a new Niche Margin Index (NMI), is a stronger predictor of establishment success than most previously tested life-history attributes and historical factors. Contrary to traditional climatic suitability metrics derived from species distribution models, the NMI is based on niche margins and provides a measure of how distant a site is inside or, importantly, outside the NCN. Integrating NMI as a measure of NCN-matching in risk assessments could improve efforts to prevent invasions and avoid costly eradications.
Keywords
alien species, native climatic niche, mammal
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This preprint is under consideration at a Nature Research journal. Preprints are preliminary reports that have not undergone peer review. They should not be considered conclusive, used to inform clinical practice, or referenced by the media as validated information.
Nature journals have partnered with Research Square to offer In Review, a journal-integrated preprint deposition service.
Article
Distance to native niche margins explains establishment success of alien mammals
Olivier Broennimann
University of Lausanne
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 23 Sep, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Terrestrial Ecology
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Declarations:
Why do some alien species introductions fail while others are successful? One key hypothesis is that in order for a species to invade a new range, it must initially establish successfully in conditions within its native climatic niche (NCN). Yet, this hypothesis has largely remained untested at the level of individual release events. Using a dataset of 989 introductions of 177 mammal species worldwide, we show that climatic matching to the NCN, measured by a new Niche Margin Index (NMI), is a stronger predictor of establishment success than most previously tested life-history attributes and historical factors. Contrary to traditional climatic suitability metrics derived from species distribution models, the NMI is based on niche margins and provides a measure of how distant a site is inside or, importantly, outside the NCN. Integrating NMI as a measure of NCN-matching in risk assessments could improve efforts to prevent invasions and avoid costly eradications.
Figure 1
Figure 2
Figure 3
Due to technical limitations, full-text HTML conversion of this manuscript could not be completed. However, the latest manuscript can be downloaded and accessed as a PDF.