Table 2. Alpha diversity measurements for all sample types.

	Shannon	Pielou’s	Richness
Amphipods	1.1±0.4	0.4±0.1	19.5±13.7
Glass beads	1.4±0.7	0.5±0.2	16.5±12.9
Water	1.5±0.8	0.5±0.2	22.2±15.9

Shannon Wiener diversity index, Pielou’s evenness and richness as number of taxa observed in each sample type.