Table 1.

Ecological quality index values (QBR-And, IHF (min–max), and BMWP-CR) calculated in 8 sites from the Volcán River watershed, period 2011–2013.

Basin Position	QBR-And	IHF	Site	Dec-11	Mar-12	Jul-12	Sep-12	Dec-12	Mar-13
Upper	95	59–67	Volcán 1	174	158	118	129	139	108
Upper	75	53–66	Angel	-	125	122	158	140	106
Upper	95	58–74	Cañas 1	153	164	160	195	164	132
Middle	75	47–56	Volcán 2	141	111	131	142	157	-
Middle	90	36–48	Maura	106	113	102	117	83	87
Middle	45	41–47	Peje	30	102	47	19	-	91
Lower	85	48–56	Volcán 3	136	140	140	112	120	89
Lower	70	51–73	Cañas 2	140	187	123	126	122	122

QBR color interpretation: green = good vegetation quality; yellow = intermediate vegetation quality; orange = bad vegetation quality [36]. IHF < 40 = inadequate to support a diverse MI community [36]. BMWP-CR color interpretation: dark blue: excellent water quality; light blue: good water quality; green: regular water quality; yellow: bad water quality; orange: very bad water quality [40].