Table 2. Mean abundances (± 1 SD) for the four most abundant species in the intertidal sandy shores.

Abundances values are given for the rupture and control areas registered before (February 2010) and after (March 2010, September 2010 and March 2011) the Maule earthquake (27 February 2010). The listed species are the anomuran crab Emerita analoga (Ea, low intertidal), the cirolanid isopod Excirolana hirsuticauda (Eh, mid-intertidal), the talitrid amphipod Orchestoidea tuberculata (Ot, high intertidal), and the ophelid polychaete Euzonus heterocirrus (Eu, low/mid-intertidal).

Site	Species	February 2010	March 2010	September 2010	March 2011
Cocholgüe	Ea	291.2 (91.2)	243.2 (87.7)	72.8 (45.2)	31.0 (12.9)
	Eh	7.6 (3.4)	5.6 (4.0)	2.4 (2.1)	11.4 (4.4)
	Ot	3.0 (1.9)	5.6 (3.1)	6.4 (3.1)	7.4 (6.4)
	Eu	18.0 (12.2)	8.2 (8.6)	0.6 (0.9)	17.6 (13.3)
Hualpén	Ea	49.0 (17.9)	62.4 (25.2)	5.8 (2.9)	19.4 (16.8)
	Eh	10.2 (5.6)	2.0 (1.2)	13.0 (6.2)	14.0 (9.1)
	Ot	3.4 (2.4)	9.6 (2.5)	3.2 (1.9)	15.2 (4.2)
	Eu	16.6 (11.3)	3.0 (3.1)	0.0 (0.0)	4.6 (3.0)
Llico	Ea	14.6 (12.6)	0.4 (0.5)	1.0 (0.7)	0.0 (0.0)
	Eh	14.2 (6.7)	0.0 (0.0)	0.4 (0.5)	33.8 (24.1)
	Ot	3.8 (3.1)	0.0 (0.0)	0.0 (0.0)	11.4 (6.7)
	Eu	0.0 (0.0)	0.20 (0.5)	0.0 (0.0)	0.0 (0.0)
Mehuín	Ea	6.8 (5.3)	7.0 (3.2)	7.6 (8.6)	2.8 (3.1)
	Eh	9.4 (3.6)	0.8 (0.8)	3.2 (2.2)	5.2 (5.5)
	Ot	11.6 (8.8)	5.2 (4.1)	5.6 (2.9)	2.0 (2.5)
	Eu	0.2 (0.4)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)
La Misión	Ea	11.0 (4.3)	1.8 (1.9)	1.0 (1.7)	4.2 (1.6)
	Eh	17.0 (11.8)	2.6 (3.2)	14.6 (4.8)	13.6 (5.4)
	Ot	32.4 (12.5)	15.6 (11.0)	6.2 (11.8)	35.6 (10.2)
	Eu	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)
Maicolpué	Ea	3.4 (2.2)	6.8 (5.9)	0.6 (0.9)	1.4 (1.5)
	Eh	24.4 (20.4)	27.2 (17.5)	17.8 (7.1)	27.8 (10.1)
	Ot	0.2 (0.4)	1.4 (1.1)	0.0 (0.0)	1.0 (0.7)
	Eu	0.0 (0.0)	1.8 (1.6)	0.0 (0.0)	0.0 (0.0)