Metadata

Description
The number of sawgrass plants is counted for each 1 m^2 plot and one third or a minimum of fifteen plants is measured. For each measured plant, measurements of the total number of live leaves, length of the live leaves, and culm diameter of the live leaves at the base are taken. From these measurements we calculate the average leaf length, and the sum of the length of the leaves. We created a model for biomass using a stepwise regression to see which of the variables measured and calculated are more correlated to explain plant biomass. Obtaining the mean biomass for the plants within the plot and multiplying it by the number of plants counted in the plot calculates biomass for each plot. The total biomass for each plot is summed with the other two plots in the same site, and they are averaged to obtain one biomass number per site. To validate our model, plant clippings are obtained in which four plants are clipped (small, medium, large, inflorescence) from each site. The same measurements are applied to the clipped plants as those applied to the measured plants in the plots. The plant clippings are oven dried at 70 degrees C and weighed.
Submission notes:
At the below sites and dates, one third of the total plants in a plot were not measured:
SRS1b: 01-Jan-01, 01-Mar-01, 01-May-02, 01-Nov-02, 01-Jul-03, 01-Nov-03, 01-Jan-04, 01-Jan-05;
SRS1d: 01-Mar-07, 01-Nov-07, 01-Nov-08, 01-Jul-12, 01-Jan-17, 01-May-20.
SRS2: 01-Jan-01, 01-May-01, 01-Jul-01, 01-Sep-01, 01-Jan-02, 01-Mar-02, 01-May-02, 01-Jan-03, 01-Jan-04, 01-May-07, 01-Jan-12, 01-Sep-13, 01-Jan-14, 01-Jan-17, 01-Mar-17, 01-Sep-17, 01-Nov-17, 01-Jun-18, 01-Sep-18, 01-Nov-17, 01-Jan-18, 01-Jan-19, 01-Mar-19, 01-Sep-19, 01-Nov-19, 01-Jan-20, 01-Mar-20, 01-May-20, 01-Jul-20, 01-Sep-20, 01-Nov-20, 01-Jan-21, 01-Mar-21, 01-May-21, 01-Jul-21, 01-Sep-21, 01-Nov-21, 01-Jan-22, 01-Mar-22, 01-May-22, 01-Jul-22, 01-Sep-22, 01-Nov-22, 01-Jan-23,, 01-Mar-23, 01-May-23, 01-Jul-23, 01-Sep-23, 01-Nov-23, 01-Jan-24.
SRS3: 01-Nov-00, 01-Mar-01, 01-May-01, 01-Jul-01, 01-Sep-01, 01-Mar-02, 01-Mar-07, 01-Jul-08, 01-Sep-09, 01-Nov-09, 01-Jan-10, 01-Sep-13, 01-Nov-13, 01-Jan-14, 01-Mar-14, 01-May-14, 01-Jul-14, 01-Sep-14, 01-Nov-14, 01-Jan-15, 01-Mar-15, 01-May-15, 01-Jul-15, 01-Sep-15, 01-Nov-15, 01-Jan-16, 01-Mar-16, 01-May-16, 01-Jul-16, 01-Sep-16, 01-Nov-16, 01-Jan-17, 01-Mar-17, 01-May-17, 01-Jun-17, 01-Sep-17, 01-Nov-17, 01-Jan-18, 01-Mar-18, 01-May-18, 01-Jun-18, , 01-Sep-18, 01-Nov-17, 01-Jan-19, 01-Mar-19, 01-May-19, 01-Jul-19, 01-Sep-19, 01-Nov-19, 01-Jan-20, 01-Mar-20, 01-May-20, 01-Jul-20, 01-Sep-20, 01-Nov-20, 01-Jan-21, 01-Mar-21, 01-May-21, 01-Jul-21, 01-Sep-21, 01-Nov-2021, 01-Jan-22, 01-Mar-22, 01-May-22, 01-Jul-22, 01-Sep-22, 01-Nov-22, 01-Jan-23, 01-Mar-23, 01-May-34, 01-Jul-23, 01-Sep-23, 01-Nov-23, 01-Jan-24.
Data are not available for Jul 2002 at site SRS1b at plot 1, so for Sawgrass_AG_Biomass (g/m2), Sawgrass_AG_Biomass_STD, Sawgrass_Culm_Density, and Sawgrass_Culm_Density_ STD only measurements from 2 plots were used (SRS1b-2 & SRS1b-3) during the Jul 2002 sampling event.
On 22-Aug-2011 a wildfire burned the vegetation at SRS1d plots, measurements of new plants started on 27-Sep-2011; from September 2011 until January 2015 three non-burned plots were stablished and measured at the site, the non-burned data (Sawgrass_AG_Biomass, Sawgrass_AG_Biomass_STD, Sawgrass_Culm_densidy & Sawgrass_Culm_Density_STD) is reported as SRS1d non-burned sites.
On September 2017 Hurricane Irma damaged all the plots at SRS2 and SRS3, measurements of new plants started on November 2017.

Instrumentation
calipers, meter sticks, PC