accuracy
; article
; biodiversity
; climate change
; Holocene
; model
; North America
; prediction
; priority journal
; space
; space for time substitution
; time
; fossil pollen
; generalized dissimilarity modeling
; global change
; paleoecology
; Biodiversity
; Climate Change
; Computer Simulation
; Demography
; Ecology
; Fossils
; Models, Biological
; North America
; Plants
; Pollen
; Species Specificity
; Time Factors
英文摘要:
"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 climatedriven 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.
Blois, J.L., Nelson Center for Climatic Research, Department of Geography, University of Wisconsin, Madison, WI 53706, United States; Williams, J.W., Nelson Center for Climatic Research, Department of Geography, University of Wisconsin, Madison, WI 53706, United States; Fitzpatrick, M.C., Appalachian Laboratory, University of Maryland Center for Environmental Science, Frostburg, MD 21532, United States; Jackson, S.T., Southwest Climate Science Center, US Geological Survey, Department of the Interior, Tucson, AZ 85719, United States; Ferrier, S., Climate Adaptation Flagship, Ecosystem Sciences, Commonwealth Scientific and Industrial Research Organisation, Canberra, ACT 2601, Australia
Recommended Citation:
Blois J.L.,Williams J.W.,Fitzpatrick M.C.,et al. Space can substitute for time in predicting climate-change effects on biodiversity[J]. Proceedings of the National Academy of Sciences of the United States of America,2013-01-01,110(23)