Table 1.

Environmental variables and V. cholerae concentrations at the three habitats of the lake Neusiedler See.

Habitat	n		V. cholerae water (CFU L−1)	V. cholerae zooplankton (CFU L−1)	Total cell number (cells mL−1)	Copepods (Ind m−3)	Cladocerans (Ind m−3)	TSSa (mg L−1)	DOCb (mg L−1)	250/365 nm absorbance ratio	Ptotc (μg L−1)	Chl. ad (μg L−1)	pH value	Electr. Conductivity (mS cm−1)	Tempe (°C)
Reed stand	33	Average	15 524	155	1.13 × 107	8916	6384	20.4	22.3	8.3	36	7.9	8.5	2.2	17.2
		Median	6800	0	1.03 × 107	3058	1626	16.5	22.3	8.1	34	7.2	8.5	2.2	18.1
		Min	0	0	3.13 × 106	72	214	11.7	10.3	5.8	23	3.1	8.3	1.6	0.7
		Max	84 000	1419	2.95 × 107	49 590	32 361	88.7	35.8	11.0	64	17.5	8.9	3.1	28.3
Open water	17	Average	12 208	266	8.89 × 106	6029	8843	109.9	14.1	16.2	87	15.9	8.8	2.1	17.0
		Median	457	0	8.32 × 106	5656	5767	62.3	14.0	15.8	75	15.3	8.8	2.0	18.8
		Min	0	0	4.54 × 106	518	9	27.3	12.7	13.3	22	4.7	8.7	1.4	1.6
		Max	54 000	3194	1.58 × 107	12 129	43 253	326.9	15.5	20.4	196	30.5	8.9	3.0	27.5
Intermediate habitat	13	Average	22 446	4497	9.13 × 106	9617	10 172	81.9	17.4	15.4	58	10.0	8.8	2.2	18.4
		Median	6100	24	9.07 × 106	10398	7885	56.0	17.6	15.0	56	7.0	8.9	2.2	19.6
		Min	0	0	3.08 × 106	1815	12	30.0	15.4	11.0	16	3.6	8.7	1.8	7.6
		Max	90 000	46 272	1.23 × 107	23 604	26 069	202.2	19.2	21.7	132	20.8	8.9	3.1	27.0

The 250/365 nm absorbance ratio is an indicator for total aromaticity and the presence of humic substances. A lower value indicates a higher concentration of high molecular weight substances (Kirschner et al., 2008).

^aTotal suspended solids.

^bDissolved organic carbon.

^cTotal phosphorus.

^dChlorophyll a.

^eTemperature.