Table 3 Abundance of aggregates formed in roller tank experiments inoculated to lower total cell abundances (103 cells mL−1).

From: Particle-associated bacteria differentially influence the aggregation of the marine diatom Minutocellus polymorphus

Sinking aggregate formation in roller tanks

End of bloom and sedimentation

Treatment

Background cell abundance

(×103 mL−1)

Aggregate abundance (per tank)

Before rotation

After rotation

M. polymorphus,

axenic

1.9 ± 0.6

1.6 ± 0.4

0.50 ± 0.84

M. adhaerens,

axenic

1.8 ± 0.2

1.3 ± 0.1

0

V. thalassae,

axenic

1.5 ± 0.1

1.4 ± 0.5

0

P. carrageenovora,

axenic

1.6 ± 0.4

1.2 ± 0.3

0

M. polymorphus

 + M. adhaerens

M. polymorphus:

0.5 ± 0.08

M. polymorphus:

0.3 ± 0.09

6.0 ± 2.83

M. adhaerens:

1.5 ± 0.1

M. adhaerens:

1.9a

M. polymorphus

 + V. thalassae

M. polymorphus:

0.6 ± 0.2

M. polymorphus:

0.5 ± 0.1

0

V. thalassae:

2.4 ± 0.05

V. thalassae:

2.7 ± 0.3

M. polymorphus

 + P. carrageenovora

M. polymorphus:

0.5 ± 0.03

M. polymorphus:

0.4 ± 0.03

0

P. carrageenovora:

2.3 ± 0.3

P. carrageenovora: 2.4 ± 0.4

M. polymorphus

+ 2.5 µm beads

M. polymorphus:

0.8 ± 0.1

M. polymorphus:

0.6 ± 0.02

1.50 ± 2.12

Beads: 1.2 ± 0.07

Beads: 1.1 ± 0.02

M. adhaerens

+ 2.5 µm beads

M. adhaerens:

2.2 ± 0.2

M. adhaerens:

1.8 ± 0.6

0

Beads: 0.6 ± 0.1

Beads: 0.5 ± 0.07

V. thalassae

 + 2.5 µm beads

V. thalassae:

1.6 ± 0.2

V. thalassae:

1.3 ± 0.05

0

Beads: 0.7 ± 0.2

Beads: 0.5 ± 0.01

P. carrageenovora

 + 2.5 µm beads

P. carrageenovora:

1.5 ± 0.08

P. carrageenovora: 1.4 ± 0.003

0

Beads: 0.2 ± 0.07

Beads: 0.1 ± 0.03

  1. Values are the means ± standard deviations of duplicate tanks (cell and aggregate abundance) or aggregates (all other parameters). Values in bold are significantly different to axenic M. polymorphus.
  2. aLoss of replicate sample.
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