Improving Transferability of Introduced Species’ Distribution Models: New Tools to Forecast the Spread of a Highly Invasive Seaweed
Open Access
- 28 June 2013
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 8 (6), e68337
- https://doi.org/10.1371/journal.pone.0068337
Abstract
The utility of species distribution models for applications in invasion and global change biology is critically dependent on their transferability between regions or points in time, respectively. We introduce two methods that aim to improve the transferability of presence-only models: density-based occurrence thinning and performance-based predictor selection. We evaluate the effect of these methods along with the impact of the choice of model complexity and geographic background on the transferability of a species distribution model between geographic regions. Our multifactorial experiment focuses on the notorious invasive seaweed Caulerpa cylindracea (previously Caulerpa racemosa var. cylindracea) and uses Maxent, a commonly used presence-only modeling technique. We show that model transferability is markedly improved by appropriate predictor selection, with occurrence thinning, model complexity and background choice having relatively minor effects. The data shows that, if available, occurrence records from the native and invaded regions should be combined as this leads to models with high predictive power while reducing the sensitivity to choices made in the modeling process. The inferred distribution model of Caulerpa cylindracea shows the potential for this species to further spread along the coasts of Western Europe, western Africa and the south coast of Australia.Keywords
This publication has 74 references indexed in Scilit:
- Challenges in Identifying Sites Climatically Matched to the Native Ranges of Animal InvadersPLOS ONE, 2011
- Vulnerability of marine habitats to the invasive green alga Caulerpa racemosa var. cylindracea within a marine protected areaMarine Environmental Research, 2010
- Fronts, jumps and secondary introductions suggested as different invasion patterns in marine species, with an increase in spread rates over timeProceedings Of The Royal Society B-Biological Sciences, 2010
- Alien Invasive Slider Turtle in Unpredicted Habitat: A Matter of Niche Shift or of Predictors Studied?PLOS ONE, 2009
- Niches, models, and climate change: Assessing the assumptions and uncertaintiesProceedings of the National Academy of Sciences, 2009
- The effect of species response form on species distribution model prediction and inferenceEcological Modelling, 2009
- Predicting current and future biological invasions: both native and invaded ranges matterBiology Letters, 2008
- Constrain to perform: Regularization of habitat modelsEcological Modelling, 2005
- Different Effects of Caulerpa racemosa on Two Co-occurring Seagrasses in the MediterraneanBotanica Marina, 2002
- The Caulerpa racemosa Complex (Caulerpales, Ulvophyceae) in the Mediterranean SeaBotanica Marina, 2000