Peracarid assemblages of Zostera meadows in an estuarine ecosystem (O Grove inlet, NW Iberian Peninsula): spatial distribution and seasonal variation

Table 3 Seasonal study: environmental variables measured in site D27 at different dates

	May	July	September	November	January	March
T sed. (°C)	19.30	18.80	19.60	16.90	21.20	12.30
T bottom water (°C)	21.50	25.20	20.10	17.20	21.20	12.40
pH sed.	7.25	7.28	7.19	7.45	7.56	6.38
pH bottom water	8.05	7.79	7.66	7.73	7.55	7.58
Salinity (‰)	32.00	34.70	40.40	40.80	32.70	41.00
Gravel	1.9	4.4	0.4	1.9	0.2	0.7
Very coarse sand	0.5	2.4	0.2	0.6	0.1	0.5
Coarse sand	1.0	4.6	0.4	0.9	1.8	1.5
Medium sand	3.8	10.2	2.4	4.8	11.0	14.5
Fine sand	40.1	46.1	37.8	58.0	20.9	64.6
Very fine sand	40.7	25.9	47.9	23.2	33.9	11.4
Silt/clay	12.0	6.4	10.9	10.6	32.1	6.7
Q₅₀	3.050	2.950	2.183	2.283	1.283	4.600
S₀	8.089	8.506	8.406	8.183	8.511	9.930
TOM (%)	0.1932	0.1745	0.1963	0.1725	0.2505	0.1747
Carbonate content (%)	1.339	1.470	1.345	1.689	1.567	1.597

Granulometric fractions in %, T sed temperature of the sediment, T bottom water temperature of the bottom water, pH sed pH of the sediment, pH bottom pH of the bottom water, Q ₅₀ median grain size, S ₀ sorting coefficient, TOM total organic matter

ISSN: 1438-3888