See: https://www.noaa.gov/iea/Assets/iea/california/Report/pdf/Ecological%20Integrity%20Status%20CCIEA%202012.pdf
cciea_EI_CP_SPNO
A data frame with 15 rows and 5 variables:
Time (seconds since 1970-01-01T00:00:00Z) [8.836128E8, 1.325376E9]
Species Number (No. of species) [2.530864, 4.763441]