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Table 2 Density of the Sabellaria tubes at each sampling date obtained by (1) using a visual counting technique; and, (2) evaluating in thin sections

From: The sedimentary dynamics of Sabellaria alveolata bioconstructions (Ostia, Tyrrhenian Sea, central Italy)

Sampling dateThe Sabellaria tube density (1) (tubes/m2)The Sabellaria tube density (2) (tubes/m2)
September 201321,450 ± 800157,100 ± 42,000
March 201428,325 ± 90043,000 ± 14,600
June 201424,500 ± 90061,000 ± 7200
August 201434,800 ± 110071,600 ± 5300