Table 2 Species densities measured through transect surveys (T. brunnea and S. purpuratus) and emergence trapping (Peramphithoe) from 2016–2018.

From: Short-term effects of hypoxia are more important than effects of ocean acidification on grazing interactions with juvenile giant kelp (Macrocystis pyrifera)

Density (ind./m2)

T. brunnea

S. purpuratus

I. resecata*

P. humeralis*

Peramphithoe

Winter

8.7

2.5

—

—

11.6

Spring

6.5

2.8

—

—

1.1

Summer

3.2

3.2

—

—

12.7

Fall

5.8

2.3

—

—

19.9

Mean

5.7

2.7

3.5

65.0

11.3

Min – Max

0–25.9

0–7.6

0–24

0–323

0–99.4

  1. Average densities are listed for each season, as well as maximum densities across all seasons, for T. brunnea and S. purpuratus. Average trap densities for each season and maximum density are listed for Peramphithoe. I. resecata and P. humeralis densities were derived from the literature (denoted by*).
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