DOI: 10.5061/dryad.69p8cz91t
title: Diameter measurements of 14 Eastern White Pine (Pinus strobus) and recruitment study results from Fish Lake Environmental Education Center (Eastern Michigan University; Lapeer County, Michigan, USA)

description: Longitudinal data on native tree growth (e.g., change in diameter) and
 recruitment provides important information on the performance and
 productivity of these long-lived organisms over discrete environmental
 periods (e.g., seasons, years). The first data set in this file may prove
 useful to many users including, but not limited to ecological or forestry
 modelers ground truthing regional models estimating tree productivity,
 forestry students learning to estimate how individual tree basal area
 changes over seasons or year, or instructors and students looking for
 real-world data sets that depict annual patterns of logistic growth. The
 second data set in this file contains the raw establishment data from seed
 additions made into experimental forest plots at Fish Lake Environmental
 Education Center. These experimental plots evaluated how Downed Woody
 Debris, Rodent seed consumption, and invasive shrub cover influence the
 establishment of several sown trees seeds and the seeds of an invasive
 shrub.
description: Data Set #1 Data
 Type and Collection: In May 2018, I installed fourteen (14) D1
 Permanent Tree Girth bands (UMS GmbH, München, Gmunderstr. 37; supplied by
 METER USA/Decagon Devices [Pullman, WA, USA]) on mature (&gt;25 cm
 Diameter at Breast Height [DBH]) White Pines (<em>Pinus
 strobus</em>) located on the Fish Lake Environmental Education
 Center property (Lapeer County, Michigan). Each band was secure at 1.5 to
 1.6 m above the soil surface (depending on branch position) and bands were
 installed according to manufacturer’s instructions. Data values report the
 estimates of tree diameter (cm) reported from visual inspection of the
 band’s scale taken approximately between 9:00AM and 12:00PM on the data
 collection date specified.  Data collection will be ongoing and I will
 post new diameter data annually. Data Set #2 Data Type
 and Collection:  See Connolly et al.; Canadian Journal of Forest
 Research for details on data type and experimental setup.
description: Data Set #1 Usage Notes:  Sampling interval
 varies by year. For example, in 2018 measurements of tree diameter were
 made every 1-2 weeks from May to August, but in 2019 sampling intervals
 occurred roughly once every month.  In 2020, due to property restrictions
 in the COVID-19 pandemic I was only able to get diameter estiamtes in
 February and November.  Below is a list of the column headers
 description: Data Set #1 Column
 Headers: “Tree_ID”:  Column with
 a unique identified for each tree with band
 “Measurement_Number”: Column indicated the number, in sequence,
 of measurement on each unique tree “Northing”:  The
 latitude location of the tree estimated to the nearest 3 m
 “Easting”:  The longitude location of the tree estimated to the
 nearest 3 m “Measurement_date”:  The calendar date on
 which measurements of diameter were taken “Diameter_ cm” columns:   The
 diameter of each tree on that sample date reported in
 centimeter o
 uien  Data Set #2 Usage
 Notes:  This data has been formally analyzed and presented in
 Connolly et al.; Canadian Journal of Forest Research Data Set #2 Column
 Headers: "Exc_numb": 
 The number identifying unique exclosures to which seeds were
 added. "Plot": The identifier of
 experimental blocks "Invders":  Whether
 invasive shrubs had been removed "REM" or left "CNL"
 at a particular site  "site": a unique
 identifier for each site "CWD": a
 categorical variable defining whether coarse woody debris had been removed
 "Absent" or made into a artifical deposition
 "Present" "Rod_Ac": a categorical
 variable indicating whether holes were cut in the exclosures to premit
 Rodents access "Yes" or the exlcosures were left intact to
 exclude seed consumers "No".
 "sow_date":  The date seeds were sown into
 exclosures "Surv_date":  The date when
 final seedling establishment counts were made
 "Species":  The species whose establishment was
 counted: "PIST" - Pinus strobus, "LOMA" - Lonicera
 maackii, "SAAL" - Sasafras albidum
 "counts": The number of seedlings of that species in
 that exclosure on the survey date