Dietary variation and food selection by mayfly grazers in a subtropical mountain stream

Table 3 SIMPER analysis of contribution of species

Algal species	Dry season		Wet season
Algal species	Caged	Grazed	Caged	Grazed
Achnanthes spp.	35.50	51.87	2.67	2.26
Achnanthidium minutissimum (Kützing) Czarnecki	13.13	5.49	2.74
Achnanthidium pyrenaicum (Hustedt) H. Kobayasi			55.04	71.74
Cocconeis placentula var. euglypta		7.77	2.26	7.19
Diatoma vulgaris Bory de Saint-Vincent		2.79
Gomphonema spp.			18.53	13.19
Planothidium lanceolatum (Brébisson ex Kützing) Lange-Bertalot	41.48	24.08	5.31	2.58
Total contribution	90.11	92.00	86.55	96.96

SIMPER (similarity of percentage) analysis of contribution (%) of species occurrence in epilithic algal community respectively sampled on the caged bricks and the grazed cobbles in the dry and wet seasons in the Chichiawan Stream.