A Comparison of Fishes and Invertebrates Living in the Vicinity of Energized and Unenergized Submarine Power Cables and Natural Sea Floor off Southern California, USA

Table 3

Effects of cable state (energized or unenergized), side of cable surveyed (W or E) nested in cable state, stratum groups (1–4), and year (2012–2014) on invertebrate density tested using a generalized linear model (normal distribution, identity link) (). Densities were -transformed. Cable state is energized or unenergized. Stratum groups are discussed under Results. indicates statistical significance.

Taxon	Source	Whole-model difference	Cable state	Cable side	Stratum groups	Year
	DF	8	1	2	3	2
Metridium farcimen		77.190	5.485	1.564	57.817	7.843
		<0.0001	0.019	0.458	<0.0001	0.020
Pandalus platyceros		73.407	0.911	0.271	56.182	37.781
		<0.0001	0.340	0.873	<0.0001	<0.0001
Unident. thin Pennatulacea		93.957	0.009	66.213	46.116	9.299
		<0.0001	0.925	<0.0001	<0.0001	0.010
Apostichopus californicus		80.209	1.141	2.368	75.479	5.471
		<0.0001	0.285	0.306	<0.0001	0.065
Luidia spp.		45.971	12.983	0.960	4.591	24.452
		<0.0001	0.0003	0.619	0.204	<0.0001
Octopus rubescens		27.199	0.019	14.847	10.446	0.003
		0.001	0.889	0.001	0.015	0.999
Urticina spp.		75.522	5.480	1.954	58.734	4.900
		<0.0001	0.019	0.376	<0.0001	0.086
Unident. black Crinoidea		42.274	7.728	6.192	27.052	12.625
		<0.0001	0.005	0.045	<0.0001	0.002
Lytechinus pictus		11.896	1.430	7.024	2.203	3.951
		0.156	0.232	0.030	0.531	0.139
Total invertebrates		53.719	5.147	2.146	48.160	11.601
		<0.0001	0.023	0.342	<0.0001	0.003