Aqueous parameters were measured with Hach kits after samples were filtered through 0.45 µm mixed cellulose ester filters. Specifically, aqueous samples were analyzed for orthophosphate and total phosphate (Hach TNT843); alkalinity (TNT870); nitrate (TNT835 or TNT836; dependent on sample concentration range); ammonium (TNT830, TNT831, or TNT832; dependent on sample concentration range); nitrite (TNT839 and TNT840); and total nitrogen (TNT827). The method detection limit (MDL) and minimum reporting level (MRL) for total phosphorus and orthophosphate were estimated according to Ripp 1996, and were, respectively, found to be 0.005 and 0.005 mg-P•L -1 (MDL) and 0.014 and 0.016 mg-P•L -1 (MRL; SI Table ). Briefly, 9 replicates of the same concentration were analyzed using TNT843, and MDL was defined as the product of the t-value for n-1 samples (t = 2.896) and the sample standard deviation of those replicates. MRL was defined as three times the value of the MDL.