Table 1 Physicochemical properties of the sediments and overlying water in spring and autumn.

From: The spatio-temporal distribution of alkaline phosphatase activity and phoD gene abundance and diversity in sediment of Sancha Lake

Parameters	Season	L1	L2	L3	L4	L5	L6	L7	L8	L9
pH	Spring	6.38 ± 0.21	6.30 ± 0.25	6.20 ± 0.09	6.64 ± 0.11	6.56 ± 0.06	6.42 ± 0.15	6.13 ± 0.058	6.39 ± 0.05	6.25 ± 0.015
pH	Autumn	8.07 ± 0.06	7.42 ± 0.06	7.43 ± 0.24	8.32 ± 0.10	7.66 ± 0.30	7.55 ± 0.04	7.72 ± 0.055	8.20 ± 0.05	7.62 ± 0.026
DO (mg L⁻¹)	Spring	9.70 ± 0.1	10.13 ± 0.15	9.67 ± 0.58	8.67 ± 0.21	9.30 ± 0.10	8.30 ± 0.10	10.87 ± 0.5	8.87 ± 0.4	8.50 ± 0.1
DO (mg L⁻¹)	Autumn	4.20 ± 0.1	5.63 ± 0.25	5.87 ± 0.21	4.93 ± 0.15	5.50 ± 0.20	4.27 ± 0.20	5.50 ± 0.2	5.60 ± 0.3	4.90 ± 0.3
T (℃)	Spring	11.90 ± 1.0	15.93 ± 0.95	13.27 ± 0.90	14.0 ± 1.0	12.63 ± 0.55	12.73 ± 0.75	14.3 ± 0.3	11.6 ± 0.4	12.6 ± 0.5
T (℃)	Autumn	14.10 ± 0.2	17.0 ± 0.40	15.90 ± 0.10	15.0 ± 1.0	14.40 ± 0.40	14.20 ± 0.20	16.8 ± 0.2	13.2 ± 0.3	14.1 ± 0.2
DOP (mg L⁻¹)	Spring	0.003 ± 0.001	0.006 ± 0.001	0.004 ± 0.001	0.002 ± 0.0006	0.002 ± 0.001	0.003 ± 0.001	0.001 ± 0.0006	0.002 ± 0.001	0.002 ± 0.0006
DOP (mg L⁻¹)	Autumn	0.005 ± 0.001	0.008 ± 0.001	0.007 ± 0.001	0.003 ± 0.001	0.006 ± 0.0006	0.004 ± 0.0006	0.005 ± 0.0006	0.006 ± 0.001	0.011 ± 0.001
SRP (mg L⁻¹)	Spring	0.05 ± 0.0002	0.03 ± 0.0001	0.01 ± 0.0002	0.042 ± 0.002	0.037 ± 0.0008	0.052 ± 0.0004	0.086 ± 0.0002	0.016 ± 0.0006	0.046 ± 0.0006
SRP (mg L⁻¹)	Autumn	0.01 ± 0.0010	0.006 ± 0.001	0.009 ± 0.0006	0.008 ± 0.0006	0.052 ± 0.004	0.026 ± 0.002	0.006 ± 0.001	0.011 ± 0.001	0.01 ± 0.0060
TP (mg g⁻¹)	Spring	0.58 ± 0.021	0.27 ± 0.002	0.60 ± 0.006	1.99 ± 0.09	1.75 ± 0.002	1.81 ± 0.01	0.53 ± 0.017	2.32 ± 0.01	1.03 ± 0.0017
TP (mg g⁻¹)	Autumn	0.86 ± 0.064	0.53 ± 0.099	0.82 ± 0.02	2.06 ± 0.06	2.42 ± 0.032	1.93 ± 0.04	0.71 ± 0.004	2.46 ± 0.03	1.19 ± 0.085
OP (mg g⁻¹)	Spring	0.18 ± 0.031	0.13 ± 0.01	0.18 ± 0.008	0.63 ± 0.049	0.54 ± 0.01	0.32 ± 0.002	0.15 ± 0.002	0.67 ± 0.003	0.33 ± 0.0049
OP (mg g⁻¹)	Autumn	0.49 ± 0.002	0.20 ± 0.002	0.23 ± 0.002	0.65 ± 0.001	0.73 ± 0.003	0.58 ± 0.005	0.41 ± 0.002	0.77 ± 0.005	0.38 ± 0.002
HCl-P (mg g⁻¹)	Spring	0.41 ± 0.002	0.21 ± 0.002	0.43 ± 0.004	1.11 ± 0.015	0.97 ± 0.009	0.99 ± 0.036	0.26 ± 0.004	1.16 ± 0.004	2.38 ± 3.14
HCl-P (mg g⁻¹)	Autumn	0.35 ± 0.006	0.337 ± 0.007	0.43 ± 0.001	1.15 ± 0.002	1.32 ± 0.02	1.06 ± 0.02	0.33 ± 0.002	1.36 ± 0.003	0.66 ± 0.004
NaOH-P (mg g⁻¹)	Spring	0.15 ± 0.001	0.14 ± 0.002	0.19 ± 0.001	0.27 ± 0.030	0.25 ± 0.01	0.23 ± 0.002	0.13 ± 0.002	0.29 ± 0.004	0.155 ± 0.001
NaOH-P (mg g⁻¹)	Autumn	0.25 ± 0.002	0.15 ± 0.010	0.24 ± 0.010	0.48 ± 0.003	0.53 ± 0.01	0.45 ± 0.001	0.24 ± 0.001	0.56 ± 0.001	0.25 ± 0.002
TOC (mg g⁻¹)	Spring	20.6 ± 0.1	13.8 ± 0.1	18.0 ± 0.6	24.3 ± 0.1	25.5 ± 0.2	22.5 ± 0.1	18.4 ± 0.1	28.9 ± 0.1	19.7 ± 0.1
TOC (mg g⁻¹)	Autumn	24.5 ± 0.1	18.3 ± 0.1	17.2 ± 0.1	25.9 ± 0.1	24.5 ± 0.1	23.4 ± 0.1	19.3 ± 0.1	28.5 ± 0.1	20.3 ± 0.1
TN (mg g⁻¹)	Spring	2.2 ± 0.02	1.32 ± 0.02	1.4 ± 0.03	2.13 ± 0.01	2.3 ± 0.02	1.89 ± 0.01	1.48 ± 0.02	2.5 ± 0.02	2.10 ± 0.02
TN (mg g⁻¹)	Autumn	2.1 ± 0.02	1.25 ± 0.01	1.9 ± 0.03	2.53 ± 0.01	2.6 ± 0.03	1.68 ± 0.04	1.31 ± 0.01	2.4 ± 0.05	1.98 ± 0.02
ALP (μmol g⁻¹ h⁻¹)	Spring	0.76 ± 0.02	0.26 ± 0.01	0.55 ± 0.01	0.79 ± 0.01	0.55 ± 0.01	0.22 ± 0.01	0.4 ± 0.02	0.84 ± 0.02	0.7 ± 0.01
ALP (μmol g⁻¹ h⁻¹)	Autumn	0.82 ± 0.0004	1.08 ± 0.0005	2.42 ± 0.0001	1.33 ± 0.004	1.40 ± 0.0003	0.46 ± 0.0006	0.67 ± 0.0006	2.01 ± 0.0008	1.13 ± 0.01

DO, T, DIP, and DOP were measured in overlying water of sediments. pH, TOC, TN, TP, OP, HCl-P, NaOH-P, and ALP were measured in sediments. Data are mean ± standard deviation.

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Table 1 Physicochemical properties of the sediments and overlying water in spring and autumn.

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