Forest DBH - Raw Data — Main Cropping System Experiment (MCSE)
Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
The raw DBH (tree diameter at breast height) values from the forested sites, diameters are measured at 4 points along the trunk.
This datatable is part of the Forest Increment Survey dataset. In 1998, a new protocol was instituted for measuring the diameters of every tree greater than 5 cm dbh in the coniferous and deciduous forest plots. Trees are usually measured in January. Exponential equations are used to estimate tree mass for each year. The goal is to estimate wood production for any given time period (usually one year) as the difference between two estimates of mass.
Note
| Experiment: | Main Cropping System Experiment (MCSE) |
| Data available from: | December 1998 to March 2012 |
| Dataset: | KBS045 |
| Datatable ID: | KBS019-017.64 |
| Core Areas | Primary Production,Populations,Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/b07ff1f1366f4252d651f2b45710f3d8 |
| Related Tables: | |
| Personnel: |
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| Last Updated | 2022-07-08 |
| Variate | Description | Units |
|---|---|---|
| sample date | day the tree was measured | |
| year | sample year (this is the year to which the sample is assigned, even if the actual sample date is in the following year) | |
| treatment | treatment sampled | |
| replicate | replicate sampled | |
| tree id | id of the tree sampled | |
| species | species sampled | |
| color | location of the dbh measurement | |
| dbh | diameter measured | centimeter |
| estimated | Set to true if the dbh has been estimated from the previous and following years. |
Data Excerpt
| sample_date | year | treatment | replicate | tree_id | species | color | dbh | estimated |
|---|---|---|---|---|---|---|---|---|
| 2020 | DF | 3 | 1011 | Prunus serotina Ehrh. (*) | blue | false | ||
| 2020 | DF | 3 | 1011 | Prunus serotina Ehrh. (*) | orange | false | ||
| 2020 | DF | 3 | 1011 | Prunus serotina Ehrh. (*) | red | false | ||
| 2020 | DF | 3 | 1011 | Prunus serotina Ehrh. (*) | white | false | ||
| 2022-02-11 | 2021 | CF | 2 | 233 | Pinus strobus L. (*) | blue | 27.0 | false |