Plant parameters assessed from random quadrat sampling in marsh mesoscosms immediately after oiling: July-November 2019

Plant parameters were sampled monthly at the Louisiana Universities Marine Consortium (LUMCON) saltmarsh mesocosm facility in Cocodrie, Louisiana. These twelve hydrologically-isolated, large (~3m diameter) mesocosms were planted with intact Spartina alterniflora and soil sections in January 2018. Each month from July to November 2019, 5 out of 25 possible central grids were randomly selected to be sampled within each marsh mesocosm. A 0.25m x 0.25 m quadrat was randomly placed within each grid and the following plant parameters were recorded: live stem density (stems/m2), median live stem height (cm; determined from measurements of 5 random stems per quadrat), new growth (stems < 10 cm) stem density (stems/m2), flower density (flowers/m2), and dead stem density (stems/m2). This dataset represents results for the four-month period after each mesocosm received one of 4 levels of oiling on 2019-07-08: Control (0.0 L/m2), Low (0.1 L/m2), Medium (0.5 L/m2), or High (3.0 L/m2). This is a continuation of dataset R6.x808.000:0035 (DOI: 10.7266/n7-08d3-ce43) that covers data during the June 2018–June 2019 pre-oiling period.