Macrocystis integrifolia and Lessonia trabeculata (Laminariales; Phaeophyceae) kelp habitat structures and associated macrobenthic community off northern Chile

Table 5 Results of principal components analyses (PCA) based on the invertebrate groups of the three studied habitats

PC axis	PC1	PC2	PC3	PC4	PC5	PC6	PC7
Eigenvalue	2.0	1.7	1.4	1.3	1.2	1.1	1.0
Proportion of variation	12.6	10.7	8.6	7.8	7.3	7.0	6.5
Cumulative variation	12.6	23.3	31.8	39.7	47.0	54.0	60.5
Eigenvectors
Anemonia alicemartinae	−0.51	−0.14	−0.21	−0.09	0.10	0.07	−0.09
Anthothoe chilensis	0.01	0.42	−0.22	0.12	0.23	0.10	−0.31
Aulacomya ater	0.04	−0.02	0.32	0.30	−0.47	−0.15	−0.10
Cancer setosus	0.14	−0.04	0.17	0.05	0.36	0.45	0.49
Concholepas concholepas	0.17	−0.14	−0.56	0.19	−0.25	−0.08	0.08
Crassilabrum crassilabrum	−0.02	0.33	0.03	−0.30	−0.25	−0.38	0.50
Fissurella latimarginata	0.14	−0.10	−0.47	0.27	−0.07	0.03	0.41
Heliaster helianthus	−0.18	0.60	−0.06	−0.09	−0.12	−0.15	0.03
Loxechinus albus	0.08	−0.01	0.24	0.55	−0.15	−0.01	−0.15
Luidia magellanica	0.16	−0.17	−0.27	−0.04	0.31	−0.46	−0.23
Piura chilensis	0.13	0.49	−0.11	0.17	0.16	0.25	−0.14
Priene rude	0.07	−0.10	0.03	−0.37	−0.27	0.36	−0.05
Stichaster striathus	−0.03	−0.04	−0.25	−0.27	−0.41	0.35	−0.28
Tegula atra	0.07	−0.15	0.16	−0.27	0.23	−0.24	−0.13
Tegula tridentata	−0.52	−0.03	−0.05	0.14	0.07	0.03	0.13
Tetrapygus niger	−0.56	−0.09	0.00	0.20	−0.02	−0.02	0.05

For all axes with Eigenvalues >1.0 Eigenvalues, proportion of variation modelled, cumulative variation modelled, and Eigenvectors (variable loadings) are given. Eigenvectors with the strongest loadings > 0.35 in bold

ISSN: 1438-3888