Ecological Archives E093-163-A8

Robert K. Booth, Simon Brewer, Maarten Blaauw, Thomas A. Minckley, and Stephen T. Jackson. 2012. Decomposing the mid-holocene Tsuga decline in eastern North America. Ecology 93:1841–1852.

Appendix H. Comparison of timing of early Tsuga-decline events among sites.

Table H1. Age-estimates for significant negative excursions in Tsuga pollen percentages at Irwin Smith Bog (ISB) and Tower Lake (TL) that preceded the terminal declines (see orange arrows in Appendix D, Figs. D1 and D2). MPA refers to Maximum Probability Age, the best estimate for age of the event. All ages are in yr BP. Events are numbered consecutively with increasing age.

Event MPA Bracketing ages
(95% CIs)
ISB1 5341 5082–5375
ISB2 5710 5593–5769
ISB3 6366 6030–6431
ISB4 6788 6550–6789
TL1 5385 5366–5576
TL2 5539 5451–5676

Fig. H1. Comparison of age-probability distributions (not shown) for all pairs of pre-terminal Tsuga-decline events between Irwin Smith Bog and Tower Lake. Events are labeled and defined according to Table H1. For each pair of events, we drew dates at random from the respective age-probability distributions. The 95% highest posterior density (HSD) range is given in blue. In the ISB2-TL2 comparison, the HSD range encloses the zero difference line, indicating no significance difference in ages of the event between the sites. For all other comparisons, the zero-difference line is outside the HSD range, indicating significant differences in ages.

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