Table 1. The effect of bacterial biofilms of P. tunicata (Pt), H. marina (Hm), Alteromonas sp strain Ni1-LEM and Halomonas sp strain Nc1-LEM on the settlement of common biofouling diatoms and the settlement and germination of the zoospores of the macroalga U. lactuca. Values presented are mean percentages of settlement from three replicate trials ± one standard deviation.

Microorganisms

Treatments

Diatoms (Bacillariophyta)

Control

Pt

Hm

Ni1-LEM

Nc1-LEM

Nitzschia sp1

95.4 ± 1,7^a

52.4 ± 5,5^b

59.5 ± 7.8^b

41.5 ± 3.9^c*

94.0 ± 5.7^a

Amphora sp

100 ± 0^a

43.4 ± 4.3^b

52.0 ± 0.0^b

36.8 ± 7.1^c*

100 ± 3.0^a

Cylindrotheca closterium

81.6 ± 2.9^a

38.4 ± 1,9^c

48.5 ± 2,2^b

36.5 ± 5.5^c*

80.2 ± 6.3^a

Nitzschia ovalis arnott

70.9 ± 6,8^a

27.9 ± 6.3^c

34.2 ± 3.4^b

24.4 ± 2.4^c*

68.3 ± 4.2^a

Chaetoceros minutissimus

71.5 ± 2.5^a

25.9 ± 4.0^c

36.4 ± 1.7^b

22.2 ± 3.0^c*

70.4 ± 6.5^a

Navícula sp1

62.3 ± 1.5^a

18.9 ± 1.7^c

25.1 ± 4.0^b

16.0 ± 2.0^c*

65.2 ± 3.8^a

Navícula sp2

94.1 ± 7.8^a

43.4 ± 6.8^c

56.2 ± 5.1^b

41.2 ± 2.1^c*

92.2 ± 4.0^a

Nitzschia sp2

93.3 ± 3.5^a

45.5 ± 5.0^c

53.1 ± 8.5^b

40.1 ± 2.4^c*

94.3 ± 3.3^a

Algae (Chlorophyta)

Ulva lactuca

93.4 ± 9.6^a

19.4 ± 2.7^b

22.3 ± 4.4^b

7.5 ± 2.5^c*

94.0 ± 8.8^a

(83.5 ± 9.3)^a

(27.6 ± 6.6)^b

(31.5 ± 3.8)^b

(12.4 ± 3.3)^c*

(80.4 ± 5.0)^a