Table 1 Summary of genes that exhibit copy number variations across two tidal environments, intertidal and subtidal, ordered by descending variance.

OG0000017

*TMTC4

Protein O-mannosyl-transferase

27

1

26

Protein O-linked mannosylation

OG0000033

*stan

Protocadherin-like wing polarity protein stan

22

1

21

Calcium-dependent cell–cell adhesion via plasma membrane cell adhesion molecules

OG0000042

*AKR1

Ankyrin repeat-containing protein

19

1

18

Palmitoyltransferase specific for casein kinase 1

OG0000200

*Atp2b3

Plasma membrane calcium-transporting ATPase 3

9

1

8

Calcium ion export across plasma membrane

OG0000176

Tmem145

Transmembrane protein 145

3

7

4

G-protein-coupled receptor signalling pathway

OG0000293

n/a

n/a

2

6

4

n/a

OG0000294

n/a

n/a

2

6

4

n/a

OG0000304

KCNF1

Potassium voltage-gated channel subfamily F member 1

2

6

4

Regulation of ion transmembrane transport

OG0000444

MIMI_R240

Collagen-like protein 4

1

5

4

May participate in the formation of layer of cross-linked glycosylated fibrils

OG0000148

n/a

n/a

4

7

3

n/a

OG0000149

ARHGEF7

Rho guanine nucleotide exchange factor 7

4

7

3

Positive regulation of apoptotic process

OG0000237

*yomI

SPBc2 prophage-derived uncharacterized transglycosylase

6

3

3

Peptidoglycan metabolic process

OG0000238

n/a

3

6

3

n/a

OG0000377

Cyb5rl

NADH-cytochrome b5 reductase-like

2

5

3

Desaturation and elongation of fatty acids; cholesterol biosynthesis

OG0000384

yraN

UPF0102 protein

2

5

3

Nucleic acid binding

OG0000577

*SNRNP200

U5 small nuclear ribonucleoprotein 200 kDa helicase

4

1

3

mRNA splicing

OG0000584

n/a

n/a

1

4

3

n/a

OG0000604

nma111

Pro-apoptotic serine protease

1

4

3

Apoptotic process

OG0000605

DNAI3

WD repeat-containing protein 63

1

4

3

Negative regulation of cell migration

OG0000606

adrb1

Beta-1 adrenergic receptor

1

4

3

Adenylate cyclase-activating adrenergic receptor signalling pathway