Table 3

Relation between fluxes and nutrient concentrations Ammonium and nitrite+nitrate concentrations (μmol L-1) in the column, canopy and pore waters in the P. oceanica meadow of the Revellata Bay at 10 m depth (mean ± standard deviation; number of sample into brackets); correlation coefficient (r2) between the concentration gradient at the water-sediment interface (canopy and pore-water) and the fluxes (from table 2) at this interface.

Column water

Canopy water

Pore water

r2


NH4+

February 1997

0.10 ± 0.10 (3)

≤ 0.05 (21)

3.5 ± 5.0 (22)

0.62

June 1997

0.05 ± 0.03 (5)

0.07 ± 0.04 (16)

3.7 ± 3.5 (51)

October 1997

0.14 ± 0.09 (7)

0.15 ± 0.12 (14)

2.8 ± 2.1 (10)

June 1999

0.10 ± 0.06 (15)

0.50 ± 0.50 (16)

1.3 ± 2.6 (10)

NO2+NO3

February 1997

0.07 ± 0.03 (3)

0.07 ± 0.04 (21)

0.8 ± 2.1 (22)

0.90

June 1997

0.15 ± 0.04 (3)

0.18 ± 0.04 (16)

0.2 ± 0.4 (51)

October 1997

0.18 ± 0.09 (7)

0.09 ± 0.04 (14)

0.7 ± 0.7 (10)

June 1999

0.05 ± 0.03 (15)

0.19 ± 0.09 (16)

0.2 ± 0.2 (10)


Gobert et al. BMC Ecology 2002 2:9   doi:10.1186/1472-6785-2-9

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