Table 2. Composition of Cymodocea nodosa shoots collected at various distances from the natural CO2 vent site from the Island of Vulcano, Italy in 2011 and 2013.
| Conditions | Seawater carbonate chemistry† | ||
| Distance from seep | 380 m | 300 m | 260 m |
| Salinity | 37.16±0.07 | 37.12±0.06 | 37.05±0.1 |
| pH (units) | 8.11±0.01 | 7.84±0.04 | 7.32±0.05 |
| pCO2 (µtm) | 422±43 | 976±269.5 | 4009±1442.7 |
| TA (µmol kg−1) | 2549.6±29.6 | 2555.9±28.9 | 2592.5±48.3 |
Average (±SE) temperature, salinity and pH were collected on different visits from Sept 2009 to May 2011 (n = 60). Total Alkalinity (TA) was calculated from water samples collected at each site on April and November 2010 (n = 4). Statistical analyses: 1, one-factor ANOVA with Holm-Sidak multiple comparisons; 2, Kruskal-Wallis One Way Analysis of Variance on Ranks with Tukey or Dunns multiple comparisons.†Carbonate chemistry previously published in Arnold et al 2012. ††Lignin analyses conducted by the Cumberland Valley Forage lab in Cumberland Co, Maryland using the methods of Goering and Van Soest (1970).
Values are means +/− SE.