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Marine research at CNRTotal Meiofauna350030002500n. ind 10 cm -22000150010005000Dec Apr Jul OctImpact 1 Impact 2 Control 1 Control 2Figure 1: Temporal variations of total meiofaunal density at the Control and Impactedstations. Data are expressed as ind. 10 cm −2 ± SD.3.2 Meiofaunal abundance andcommunity structureThe meiofaunal densities in the top 2 cm ofthe sediments ranged from 955.2 ± 247.1to 1369.7 ± 113.2 ind. 10 cm −2 in theimpacted stations (in December and July,respectively, Figure 1), while in the controlstations they ranged from 1975.7 ±144.5 to 3009.8 ± 297.4 ind. 10 cm −2(in April and October, respectively, Figure1). Significant differences were observedbetween the impacted and the control stationsat each sampling time (K-Wallis test,p