Water Physicochemistry and Zooplankton Fauna of Aiba Reservoir Headwater Streams, Iwo, Nigeria

Table 7

Seasonal variation in the community structure of zooplankton in Aiba Reservoir headwater streams (May 2013–March 2014).

Lotic system	Number of species				Abundance				Shannon-Weiner diversity
	Season		Mann-Whitney test		Season		Mann-Whitney test		Season		Mann-Whitney test
	RS	DS			RS	DS			RS	DS
Aiba stream
Upper reaches	13	5			550	858			2.32	1.104
Lower reaches	13	12			2288	8318			2.13	0.7511
Overall	20	14			2838	9176			2.42	0.8509
Onikan stream			53	0.2855			65	0.7075			30.5	0.0179
Upper reaches	5	1			176	22			1.56	0
Lower reaches	16	12			2266	4510			2.289	0.6293
Overall	17	13			2442	4532			2.324	0.6569

RS: rainy season, DS: dry season; = 12; critical value of = 37 at < 0.05.