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Table 1 Abundance of taxa (mean percent cover ± SE, n = 18 quadrats) at each elevation zone on each studied shore in Helgoland

From: Species richness and diversity across rocky intertidal elevation gradients in Helgoland: testing predictions from an environmental stress model

Taxon

Nord-Ost Hafen

Kringel

Bunker

Low

Middle

High

Low

Middle

High

Low

Middle

High

Seaweeds

 Blidingia spp.

0.67 ± 0.67

3.61 ± 1.20

12.11 ± 4.00

0.17 ± 0.17

1.06 ± 0.38

22.11 ± 4.55

  

18.11 ± 5.18

 Ceramium virgatum

0.25 ± 0.13

        

 Chaetomorpha melangonium

2.69 ± 0.67

0.67 ± 0.27

 

0.28 ± 0.17

     

 Chondrus crispus

3.39 ± 1.16

  

13.78 ± 4.03

0.06 ± 0.06

 

4.97 ± 2.28

0.06 ± 0.06

 

 Cladophora rupestris

13.72 ± 3.42

3.19 ± 1.41

 

2.92 ± 1.50

0.25 ± 0.12

 

1.22 ± 0.43

0.58 ± 0.16

1.11 ± 0.59

 Cladostephus spongiosus

0.33 ± 0.33

        

 Corallina officinalis

      

0.33 ± 0.18

  

 Cystoclonium purpureum

0.11 ± 0.11

        

 Dumontia contorta

   

0.11 ± 0.11

     

 Elachista fucicola

1.81 ± 0.82

0.86 ± 0.50

0.03 ± 0.03

0.06 ± 0.06

0.81 ± 0.43

0.31 ± 0.23

 

0.31 ± 0.28

0.17 ± 0.08

 Filamentous red alga

0.50 ± 0.44

   

0.06 ± 0.06

  

0.17 ± 0.11

 

 Fucus sp.

0.50 ± 0.35

0.39 ± 0.24

 

0.06 ± 0.06

2.39 ± 1.07

1.22 ± 0.78

0.17 ± 0.11

 

0.72 ± 0.67

 Fucus serratus

70.78 ± 5.84

30.00 ± 8.89

 

9.11 ± 4.17

25.39 ± 7.39

1.33 ± 1.33

6.11 ± 4.19

3.56 ± 2.60

39.33 ± 10.07

 Fucus spiralis

  

0.44 ± 0.44

1.33 ± 1.33

82.50 ± 4.91

77.33 ± 7.12

  

50.67 ± 9.92

 Fucus vesiculosus

 

8.72 ± 5.83

11.00 ± 4.10

 

0.89 ± 0.89

0.44 ± 0.44

 

11.94 ± 3.73

18.22 ± 6.20

 Hildenbrandia rubra

0.22 ± 0.17

0.06 ± 0.06

0.06 ± 0.06

0.17 ± 0.08

0.25 ± 0.09

1.78 ± 0.35

0.69 ± 0.23

1.33 ± 0.39

6.39 ± 1.30

 Laminaria sp.

0.06 ± 0.06

        

 Laminaria digitata

1.22 ± 0.87

        

 Mastocarpus stellatus

33.67 ± 5.38

89.22 ± 5.02

42.17 ± 6.00

52.00 ± 7.34

35.56 ± 5.93

3.22 ± 1.27

55.17 ± 6.22

89.50 ± 3.44

12.50 ± 2.01

 Membranoptera alata

0.06 ± 0.06

0.03 ± 0.03

       

 Phymatolithon sp.

4.17 ± 1.15

1.17 ± 0.30

0.08 ± 0.06

0.67 ± 0.25

0.14 ± 0.11

0.11 ± 0.11

8.61 ± 1.80

6.89 ± 1.84

7.83 ± 1.94

 Plumaria elegans

0.06 ± 0.06

        

 Porphyra sp.

0.06 ± 0.06

0.19 ± 0.12

4.61 ± 2.59

1.44 ± 0.89

0.06 ± 0.06

1.36 ± 0.66

   

 Ralfsia sp.

 

0.17 ± 0.08

9.36 ± 1.65

3.75 ± 1.33

1.44 ± 0.45

 

0.78 ± 0.42

0.22 ± 0.09

1.25 ± 0.79

 Red alga

0.17 ± 0.17

        

 Rhodothamniella floridula

3.89 ± 0.93

0.53 ± 0.39

 

0.03 ± 0.03

0.08 ± 0.06

   

0.33 ± 0.24

 Ulva sp. 1

6.75 ± 1.64

11.94 ± 4.46

1.67 ± 0.68

7.31 ± 4.09

0.03 ± 0.03

0.08 ± 0.06

0.17 ± 0.07

0.17 ± 0.06

0.03 ± 0.03

 Ulva sp. 3

2.83 ± 1.54

0.67 ± 0.32

 

4.22 ± 2.92

 

0.22 ± 0.22

0.81 ± 0.78

  

 Ulva sp. 3

0.03 ± 0.03

0.33 ± 0.06

0.42 ± 0.05

0.08 ± 0.06

0.19 ± 0.08

0.22 ± 0.12

  

0.03 ± 0.03

Invertebrates

 Actinia equina

   

0.06 ± 0.06

0.19 ± 0.08

0.11 ± 0.11

   

 Amphipoda

1.78 ± 0.24

0.33 ± 0.06

0.42 ± 0.05

0.03 ± 0.03

 

0.11 ± 0.05

0.03 ± 0.03

0.28 ± 0.06

0.56 ± 0.08

 Anemone

 

0.03 ± 0.03

       

 Anurida maritima

     

0.08 ± 0.05

   

 Balanus balanus

1.78 ± 0.24

0.86 ± 0.43

    

0.33 ± 0.17

  

 Balanus crenatus

      

0.03 ± 0.03

  

 Balanus improvisus

0.81 ± 0.16

1.25 ± 0.28

 

0.06 ± 0.06

0.67 ± 0.36

 

0.64 ± 0.12

0.28 ± 0.08

 

 Carcinus maenas

0.61 ± 0.09

1.47 ± 0.17

0.17 ± 0.08

0.97 ± 0.22

0.89 ± 0.20

0.14 ± 0.08

0.61 ± 0.09

0.53 ± 0.08

0.42 ± 0.18

 Crassostrea gigas

 

1.25 ± 0.51

0.19 ± 0.09

0.22 ± 0.22

  

0.36 ± 0.24

1.56 ± 0.50

 

 Cryptosula pallasiana

0.33 ± 0.20

0.58 ± 0.20

0.06 ± 0.06

   

0.31 ± 0.18

0.22 ± 0.22

 

 Dynamena pumila

1.14 ± 0.37

1.72 ± 0.43

0.14 ± 0.05

0.28 ± 0.13

0.61 ± 0.29

 

1.72 ± 0.38

1.11 ± 0.34

0.17 ± 0.07

 Electra pilosa

3.22 ± 1.14

0.64 ± 0.14

0.03 ± 0.03

0.22 ± 0.10

  

0.22 ± 0.07

0.08 ± 0.05

 

 Elminius modestus

0.33 ± 0.13

1.11 ± 0.23

1.83 ± 0.29

0.17 ± 0.07

0.94 ± 0.54

0.17 ± 0.07

0.36 ± 0.10

0.39 ± 0.10

0.31 ± 0.09

 Flustrellidra hispida

9.50 ± 1.05

16.67 ± 1.69

0.53 ± 0.28

   

0.14 ± 0.08

  

 Gibbula cineraria

      

0.22 ± 0.12

0.03 ± 0.03

 

 Hemigrapsus sp.

  

0.03 ± 0.03

      

 Hydrozoa

0.08 ± 0.06

0.39 ± 0.22

 

0.03 ± 0.03

  

0.58 ± 0.50

0.11 ± 0.06

 

 Isopoda

0.14 ± 0.05

0.17 ± 0.06

0.22 ± 0.06

0.03 ± 0.03

0.19 ± 0.06

0.19 ± 0.07

0.22 ± 0.06

0.22 ± 0.07

0.39 ± 0.06

 Janua pagenstecheri

0.86 ± 0.14

2.08 ± 0.32

0.08 ± 0.05

   

1.44 ± 0.28

0.75 ± 0.16

 

 Laomedea flexuosa

0.03 ± 0.03

0.31 ± 0.08

0.08 ± 0.05

0.36 ± 0.10

0.69 ± 0.24

 

0.36 ± 0.09

0.58 ± 0.07

0.14 ± 0.05

 Littorina littorea

0.28 ± 0.12

0.28 ± 0.13

0.33 ± 0.14

8.89 ± 3.09

0.39 ± 0.28

 

2.31 ± 0.58

5.00 ± 0.82

0.56 ± 0.39

 Littorina obtusata

0.50 ± 0.13

0.58 ± 0.09

0.50 ± 0.17

0.47 ± 0.09

0.81 ± 0.15

0.17 ± 0.06

0.61 ± 0.12

0.75 ± 0.14

0.75 ± 0.17

 Littorina saxatilis

 

0.11 ± 0.05

0.31 ± 0.08

0.06 ± 0.04

0.08 ± 0.05

0.08 ± 0.05

0.08 ± 0.05

0.08 ± 0.05

0.03 ± 0.03

 Mytilus edulis

0.19 ± 0.08

0.72 ± 0.16

0.17 ± 0.07

0.03 ± 0.03

 

0.11 ± 0.08

0.17 ± 0.07

0.42 ± 0.08

0.17 ± 0.09

 Pilumnus hirtellus

 

0.03 ± 0.03

       

 Pomatoceros triqueter

0.03 ± 0.03

     

0.03 ± 0.03

  

 Sargatia sp.

   

0.17 ± 0.07

0.89 ± 0.23

0.17 ± 0.08

0.06 ± 0.04

0.06 ± 0.04

0.03 ± 0.03

 Sargatiogeton sp.

   

0.33 ± 0.07

1.00 ± 0.17

0.08 ± 0.06

0.14 ± 0.05

0.14 ± 0.07

0.06 ± 0.04

 Semibalanus balanoides

0.83 ± 0.20

11.33 ± 1.75

8.11 ± 1.40

0.31 ± 0.09

1.25 ± 0.59

1.08 ± 0.41

3.08 ± 0.75

7.17 ± 1.74

7.11 ± 2.09

 Spionidae

   

0.14 ± 0.05

0.19 ± 0.06

 

0.11 ± 0.05

0.11 ± 0.05

0.03 ± 0.03

 Spirorbis spirorbis

0.14 ± 0.08

     

0.06 ± 0.06

  

 Verruca stroemia

10.61 ± 2.45

0.81 ± 0.31

 

0.03 ± 0.03

     

 Worms

 

0.03 ± 0.03

 

0.08 ± 0.06

  

0.03 ± 0.03

 

0.06 ± 0.06

  1. Blanks represent zero abundance