Supplement 1. Site means (mean number of acorns counted per 30 seconds) and environmental data (from the PRISM database) used in the analyses (1994–2011).

File List Acorn_data.txt (md5: 7c7db30d39b36313243ab0042b902d11) Description Acorn_data.txt is a tab-delimited ASCII file. The file contains data for mean acorn production (measured as mean number of acorns counted per 30 sec) for <i>Q. lobata</i> and <i>Q. douglasii</i> for 12 California sites surveyed between 1994 and 2011 and weather data as estimated from the PRISM database. Column definitions: 1 = Site name<br> 2 = Latitude (decimal degrees)<br> 3 = Longitude (decimal degrees)<br> 4 = Year<br> 5 = Species<br> 6 = Mean log-transformed count (acorns per 30 sec)<br> 7 = Mean maximum April temperature<br> 8 = Mean maximum March temperature<br> 9 = March rainfall<br> 10 = April rainfall<br> 11 = March rainfall the prior year (year x - 1)<br> 12 = April rainfall the prior year (year x - 1)<br> 13 = Mean maximum summer temperature (May through August)<br> 14 = Mean maximum summer temperature the prior year (year x - 1)<br> 15 = Winter rainfall (Nov. of year x - 1 through Feb. of year x)<br> 16 = Winter rainfall the prior year (Nov. of year x - 2 through Feb. of year x - 1)<br> 17 = Mean minimum winter temperature<br> 18 = Mean maximum autumn temperature (Sept. through Nov. of year x - 1)<br> 19 = Mean maximum March temperature the prior year (year x - 1) <br> 20 = Mean maximum April temperature the prior year (year x - 1)<br> 21 = 'Combined environmental variable' for <i>Q. lobata</i> (see text)<br> 22 = 'Combined environmental variable' for <i>Q. douglasii</i> (see text)