Supplement 1. Spreadsheet with raw recruitment data in different bins, references from which these data are drawn, and reasons for rejecting potential data from additional references.
File with all studies with potential tree recruitment data - BroadleafForestRawRecruitmentDataAllRecruitRefs.csv (MD5: 54f0fd574b2b01af437054628333eb59)
Rejected studies with potential tree recruitment data with rejection justification - BroadleafForestRawRecruitmentDataRejectedRecruitRefs.pdf (MD5: de048df6fda4f9d5f8df66736b649fef)
Raw tree recruitment data from sources in 10 yr bins - BroadleafForestRawRecruitmentDataRecruitment10yrBins.csv (MD5: 160c1bd36ee13b2a59638b57f5be83d3)
Raw tree recruitment data from sources in 20 yr bins – BroadleafForestRawRecruitmentDataRecruitment20yrBins.csv (MD5: 47b08d2030c8429ed8af9268fc03fa4f)
Raw tree recruitment data from sources in 25 yr bins – BroadleafForestRawRecruitmentDataRecruitment25yrBins.csv (MD5: 8370085c0949841b03a312875be9fd30)
Raw tree recruitment data from sources in 50 yr bins – BroadleafForestRawRecruitmentDataRecruitment50yrBins.csv (MD5: 640c87488a975d3ebf285bec2f6db1c7)
The *.csv spreadsheets includes the raw data of tree recruitment drawn from previously-published studies or recruitment dates from unpublished studies and data sets across the eastern United States. Forest types that would not expected to have episodic recruitment, i.e., broadleaf-dominated forests, were the focus of this collection of recruitment dates. The data does include recruitment dates from conifers because they were present in mixed forests. As stated in the paper, "We examined a larger area than that of the 76 chronologies for disturbance detection because a review of independent and geographically-dispersed studies explicitly discussed a recruitment event, broad compositional change, or stand initiation dates in the late-1600s (Huntington 1914, Haasis 1923, Hough and Forbes 1943, Henry and Swan 1974, Grimm 1983, Guyette et al. 1994, Rentch 2003). Also, we only focused on the period prior to 1850 because of the lareg-scale impacts on forests that occurred after that time.
We first sought out potential papers with trees recruitment data from broadleaf-dominated old-growth forests. We then determined which ones had usable data, which ones were duplicates, and so on (please see the supplemnentary material for more detail). The first *.csv file, BroadleafForestRawRecruitmentDataAllRecruitRefs.csv, includes all potential papers we thought might have usable data. We then further examined these for usable data. Rejected papers for our analysls are found in Word file 'BroadleafForestRawRecruitmentDataRejectedRecruitRefs.doc'. Also provided in this file is our justification for rejection of these papers.
Raw recruitment dates in the remaining files are grouped according to the bins used in the original studies, <10 yr for the 10 yr binned data and then 20 yr, 25 yr, and 50 yr bins for the remaining data files. The various categories within each bin are related to assessments of uncertainties of each collection. Please see the original manuscript and supplementary material for more detail.