Table 1. Analysis of similarities (ANOSIM) comparing benthic community abundance, biomass and trait composition between treatments (0, 3, 7 and 48 days of hypoxia).

Treatment	Abundance		Biomass*		Traits
ANOSIM**	R	P	R	p	R	p
Global	0.77	0.00	0.69	0.00	0.81	0.00
0–3	0.57	0.03	0.39	0.03	0.19	0.17
0–7	0.42	0.03	0.22	0.09	0.72	0.03
0–48	1.00	0.03	1.00	0.03	1.00	0.03
3–7	0.44	0.03	0.20	0.06	0.75	0.03
3–48	1.00	0.03	1.00	0.03	1.00	0.03
7–48	0.83	0.03	0.71	0.03	1.00	0.03

^* Mya arenaria excluded.

^**Dummy sp. included in analyses based on Bray-Curtis measure.

Species abbrevations are; Hyd spp.; Hydrobia spp., Mac bal; Macoma balthica, Man aes; Manayunkia aestuarina, Mar spp.; Marenzelleria spp., Oli; Oligochaeta Ost; Ostracoda.

The SIMPER analysis gives the similarities within, and dissimilarities between treatments. Species contributing at least 10% to dissimilarities are listed.