Table 2.

Soil properties of sampled mangroves of Ceará State, Brazil. Data are means and one standard error. Numbers following site names are the mean depth to an indurated horizon (mean depth ± one standard error)

Site/Depth range (cm)	Total carbon (%)		Bulk density (g/cm3)		Total carbon density (g/cm3)		Organic carbon mass (Mg/ha)
	Mean	SE	Mean	SE	Mean	SE	Mean	SE
Mangroves
Acaraú Boca/255±13cm
0–15	1.36	0.17	1.08	0.06	0.015	0.002	20.7	2.9
15–30	1.17	0.15	1.03	0.09	0.012	0.002	16.5	2.4
30–50	1.10	0.16	1.03	0.09	0.011	0.002	20.7	3.2
50–100	1.51	0.22	1.00	0.04	0.015	0.003	72.7	13.9
>100	2.47	0.25	1.21	0.09	0.029	0.003	438.2	60.9
Manguezal Cauassú/239±7cm
0–15	6.52	0.78	0.44	0.03	0.027	0.002	38.6	2.5
15–30	4.63	0.65	0.55	0.05	0.024	0.002	33.9	2.4
30–50	3.68	0.61	0.60	0.05	0.021	0.001	38.8	2.7
50–100	3.08	0.46	0.74	0.07	0.022	0.004	104.8	17.1
>100	2.49	0.09	1.20	0.05	0.030	0.001	387.4	14.0
Manguinho/169±16cm
0–15	2.09	0.32	0.83	0.06	0.016	0.001	23.3	1.9
15–30	2.11	0.25	0.82	0.07	0.017	0.001	23.5	1.5
30–50	2.09	0.34	0.76	0.07	0.015	0.002	28.0	2.9
50–100	1.75	0.18	0.86	0.04	0.015	0.002	70.8	7.1
>100	0.88	0.28	1.18	0.14	0.008	0.002	54.8	14.2
Porto Céu Mangrove/61±6cm
0–15	0.90	0.19	1.34	0.08	0.012	0.002	16.4	2.9
15–30	0.85	0.15	1.24	0.07	0.010	0.001	14.2	1.6
30–50	0.51	0.17	1.36	0.12	0.006	0.001	11.2	2.4
50–100	0.47	0.11	1.50	0.01	0.007	0.002	11.0	7.7
>100	–	–	–	–	–	–	0.0	0.0
Quatro Bocas/210±6cm
0–15	1.34	0.13	0.99	0.05	0.013	0.001	18.5	1.3
15–30	0.98	0.30	1.02	0.06	0.009	0.002	13.0	2.7
30–50	0.91	0.16	1.03	0.05	0.009	0.001	17.1	2.7
50–100	1.57	0.38	1.02	0.06	0.016	0.004	75.0	18.8
>100	1.64	0.15	1.24	0.05	0.013	0.002	214.9	28.7
Rego Escuro/156±11cm
0–15	1.86	0.14	0.82	0.04	0.014	0.001	20.2	2.0
15–30	1.88	0.11	0.83	0.03	0.016	0.001	22.0	2.0
30–50	1.67	0.13	0.84	0.04	0.014	0.001	26.7	2.4
50–100	1.68	0.09	0.85	0.05	0.014	0.001	65.8	3.4
>100	0.70	0.58	1.20	0.13	0.008	0.004	45.9	12.7
Shrimp ponds
Porto Céu Shrimp/60±9cm
0–15	1.43	0.55	0.92	0.11	0.010	0.003	14.7	4.3
15–30	0.17	0.04	1.44	0.07	0.002	0.001	3.2	0.7
30–50	0.26	0.2	1.37	0.1	0.003	0.002	6.5	3.0
50–100	0.04	0.04	1.59	1.59	0.001	0.001	0.5	0.5
>100	–	–	–	–	–	–	0.0	0.0
Cauassú Leste Shrimp/144±45cm
0–15	0.15	0.04	1.56	0.11	0.002	0.001	3.1	0.8
15–30	0.34	0.10	1.40	0.13	0.004	0.001	6.2	1.8
30–50	1.18	0.0	1.23	0.2	0.011	0.005	13.5	7.5
50–100	0.06	0.3	1.47	0.1	0.001	0.000	2.1	1.1
>100	5.99	0.7	0.63	0.1	0.038	0.003	257.1	117.1
Cauassú Oeste Shrimp/103±15cm
0–15	0.79	0.44	1.36	0.11	0.009	0.004	12.3	5.6
15–30	0.35	0.26	1.45	0.12	0.004	0.002	5.3	2.4
30–50	0.21	0.14	1.43	0.13	0.002	0.001	4.1	2.0
50–100	0.28	0.21	1.50	0.07	0.004	0.003	15.8	12.1
>100	0.59	0.59	1.55	0.08	0.009	0.009	13.7	13.7