MaxEnt

This data is from a census carried out over the spring and summer of 1998 by Jessica Green on a 64 m^2 plot at the University of California’s McLaughlin Reserve in Yolo county, CA. The plot was gridded to a smallest cell size of ¼ m^2 and in each cell the abundance of every plant species found there was recorded. The spread sheet found provided here is organized as follows: the columns are plant species, with each species given a code name explained below the table of data. There are 256 rows of data, with each row corresponding to one of the ¼ m^2 cells. If the plot is viewed as a matrix, then the first row of data in the spread sheet corresponds to the upper left cell (matrix element a11). The second row of data is the matrix element a12, or in other words the cell just to the right of a11. The 17th row of data then corresponds to the plot matrix element a21, and the very last row of data is the lower right cell, a16,16. The actual data entries are the abundances of the species in each cell.

The data may be used by readers for any purpose, but any publication that includes use of the data should reference the data set to:

Green J., J. Harte, and A. Ostling, 2003. Species richness, endemism, and abundance patterns: tests of two fractal models in a serpentine grassland. Ecology Letters 6 919-928.

Moreover, the Acknowledgments should include a thanks to Jessica Green for use of the data.