This data.frame is similar to the ssdAllTrees dataframe, but is organized by plot and year instead of tree; this means that a tree has a record for each time it was measured. There are 51,493 rows of 11 columns.
A data frame with 51,493 rows and 11 variables:
The plot's nickname.
A unique identifier for an individual tree.
A tree's species. Follows USDA PLANTS database conventions except CADE should be CADE27, QUCH should be QUCH2, and PIMO should be PIMO3.
The first year this tree appeared, if it appeared after plot establishment.
The first year that this tree was measured.
The year that this tree died.
The tree's x coordinate.
The tree's y coordinate.
The year of measurement for this record. Trees may have multiple entries with different measuremeant years.
Whether the tree is a seedling (first year recorded) or tree (more than one record, or large enough when the plot was established).
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