Ranking Ecological Risk of Metals to Freshwater Organisms in Lake Taihu, China

Table 2

Total concentrations (ng/L) of metals in Lake Taihu.

Metal		Area 1	Area 2	Area 3	Area 4	Area 5	Area 6	Area 7	Sample number	Mean
As	GM	5950	2112	1594	3653	1745	2006	1882	132	2417
	GSD	1.08	1.37	1.44	2.5	1.71	1.41	1.5		1.52
Cd	GM	673	806	820	772	756	785	731	282	762
	GSD	1.16	1.12	1.06	1.11	1.07	1.05	1.29		1.12
Cr	GM	3817	22105	595	1352	1981	2668	717	280	2210
	GSD	1.22	1.15	1.05	1.06	1.1	1.08	1.28		1.13
Cu	GM	5333	2364	2482	8180	3013	1946	4006	205	3466
	GSD	1.25	1.19	1.14	1.53	1.02	1.14	1.53		1.24
Hg	GM	10	1	3	22	5	18	40	46	8
	GSD	3.67	1.39	6.31	7.42	3.61	6.29	2.72		3.94
Mn	GM	41861	65836	23235	—	28418	6000	39382	105	27473
	GSD	1.45	1.64	1.59	—	1.43	1.52	1.49		1.52
Ni	GM	16332	19477	5150	5735	13715	11216	69306	156	10002
	GSD	1.12	1.06	1.06	1.05	1.12	1.07	1.37		1.12
Pb	GM	6597	7559	741.8	5172	14889	6993	5394	270	5233
	GSD	1.25	1.15	1.16	1.3	1.17	1.23	1.58		1.26
Zn	GM	6143	40183	31722	21433	6076	16324	11670	177	15277
	GSD	1.86	1.04	1.15	1.48	1.31	1.59	1.68		1.42

Area 1: Zhushan Bay; area 2: Meiliang Bay; area 3: Gonghu; area 4: middle part; area 5: south part; area 6: southeast part; area 7: the whole lake.