Space can substitute for time in predicting climate-change effects on biodiversity
Proceedings of the National Academy of Sciences
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Abstract
“Space-for-time” substitution is widely used in biodiversity modeling to infer past or future trajectories of ecological systems from contemporary spatial patterns. However, the foundational assumption—that drivers of spatial gradients of species composition also drive temporal changes in diversity—rarely is tested. Here, we empirically test the space-for-time assumption by constructing orthogonal datasets of compositional turnover of plant taxa and climatic dissimilarity through time and across space from Late Quaternary pollen records in eastern North America, then modeling climate-driven compositional turnover. Predictions relying on space-for-time substitution were ∼72% as accurate as “time-for-time” predictions. However, space-for-time substitution performed poorly during the Holocene when temporal variation in climate was small relative to spatial variation and required subsampling to match the extent of spatial and temporal climatic gradients. Despite this caution, our results generally support the judicious use of space-for-time substitution in modeling community responses to climate change.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Space can substitute for time in predicting climate-change effects on biodiversity |
| Series title | Proceedings of the National Academy of Sciences |
| DOI | 10.1073/pnas.1220228110 |
| Volume | 110 |
| Issue | 23 |
| Year Published | 2013 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher location | Washington, D.C. |
| Contributing office(s) | Southwest Climate Science Center |
| Description | 6 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Proceedings of the National Academy of Sciences |
| First page | 9374 |
| Last page | 9379 |
| Other Geospatial | North America |
| Google Analytic Metrics | Metrics page |