Parameters	Stations Months	I	II	III
Fe (µg·g⁻¹ DW)	April 2013	57.972 ± 1.226^Cc*	116.250 ± 0.554^Aa	101.800 ± 0.481^Bb
	July 2013	71.040 ± 0.581^Ba	110.170 ± 0.750^Ab	111.017 ± 0.793^Aa
	October 2013	56.600 ± 0.921^Cd	95.815 ± 0.370^Ac	82.762 ± 0.913^Bc
	January 2014	61.942 ± 0.467^Cb	96.160 ± 0.550^Ac	82.915 ± 0.853^Bc
Cu (µg·g⁻¹ DW)	April 2013	6.180 ± 0.730^Cb	13.000 ± 0.046^Bb	14.437 ± 0.520^Aa
	July 2013	7.102 ± 0.311^Ca	10.520 ± 0.581^Bc	14.017 ± 0.160^Aa
	October 2013	5.790 ± 0.258^Cb	14.740 ± 0.300^Aa	11.447 ± 0.358^Bb
	January 2014	6.050 ± 0.150^Cb	14.770 ± 0.270^Aa	14.222 ± 0.255^Ba
Cd (µg·g⁻¹ DW)	April 2013	0.120 ± 0.082^Cb	0.152 ± 0.095^Bc	0.232 ± 0.005^Aa
	July 2013	0.074 ± 0.001^Cc	0.112 ± 0.050^Bd	0.142 ± 0.005^Ad
	October 2013	0.160 ± 0.005^Ca	0.230 ± 0.082^Aa	0.177 ± 0.005^Bc
	January 2014	0.070 ± 0.016^Cc	0.170 ± 0.050^Bb	0.192 ± 0.005^Ab
Pb (µg·g⁻¹ DW)	April 2013	4.652 ± 0.066^Cd	6.442 ± 0.160^Ad	5.702 ± 0.102^Bd
	July 2013	6.625 ± 0.119^Cb	12.325 ± 0.087^Bb	14.245 ± 0.052^Aa
	October 2013	7.212 ± 0.164^Ca	10.275 ± 0.130^Ac	8.640 ± 0.126^Bc
	January 2014	5.420 ± 0.024^Cc	55.100 ± 0.540^Aa	11.822 ± 0.026^Bb
Cr (µg·g⁻¹ DW)	April 2013	9.232 ± 0.046^Bd	13.372 ± 0.204^Ab	9.422 ± 0.120^Bd
	July 2013	11.892 ± 0.197^Bc	16.100 ± 4.985^Bb	28.640 ± 0.377^Aa
	October 2013	12.395 ± 0.031^Cb	12.780 ± 0.059^Ab	12.602 ± 0.020^Bc
	January 2014	16.205 ± 0.117^Ca	20.050 ± 0.067^Aa	17.212 ± 0.165^Bb
Zn (µg·g⁻¹ DW)	April 2013	4.592 ± 0.300^Cb	27.572 ± 0.300^Bb	54.322 ± 0.437^Aa
	July 2013	4.925 ± 0.080^Cb	20.262 ± 0.470^Bc	39.372 ± 0.314^Ab
	October 2013	4.902 ± 0.127^Cb	29.950 ± 0.210^Aa	27.090 ± 0.344^Bd
	January 2014	5.365 ± 0.300^Ca	29.470 ± 0.453^Ba	30.710 ± 0.423^Ac
As (µg·g⁻¹ DW)	April 2013	2.762 ± 0.101^Bc	2.702 ± 0.233^Bd	3.527 ± 0.305^Ac
	July 2013	3.107 ± 0.071^Cb	6.160 ± 0.048^Aa	5.715 ± 0.338^Bb
	October 2013	3.532 ± 0.041^Ca	3.937 ± 0.017^Ab	3.807 ± 0.043^Bc
	January 2014	3.222 ± 0.181^Bb	3.332 ± 0.132^Bc	6.332 ± 0.186^Aa
Mn (µg·g⁻¹ DW)	April 2013	28.840 ± 0.448^Ba	28.780 ± 0.255^Bc	31.625 ± 0.327^Ab
	July 2013	27.370 ± 0.310^Cb	28.101 ± 0.545^Bd	29.757 ± 0.327^Ac
	October 2013	21.175 ± 0.374^Cc	41.465 ± 0.410^Aa	29.982 ± 0.578^Bc
	January 2014	23.652 ± 0.398^Cb	40.670 ± 0.420^Ab	35.235 ± 0.590^Ba
Ni (µg·g⁻¹ DW)	April 2013	9.272 ± 0.042^Cd	11.565 ± 0.147^Bd	13.535 ± 0.068^Ac
	July 2013	11.470 ± 0.073^Cc	11.407 ± 0.073^Bb	47.372 ± 0.453^Aa
	October 2013	13.310 ± 0.105^Bb	15.240 ± 0.251^Ac	13.515 ± 0.030^Bc
	January 2014	20.112 ± 0.137^Ca	54.230 ± 0.158^Aa	24.740 ± 0.048^Bb