|
Year
|
Date
|
Temp (°C)
|
Phyto (×103 cells mL−1)
|
Treatment N
|
Control N
|
N mussels 100 L−1
|
Mean length (mm) ± SD
|
Clearance rate measured
|
|---|
|
Bacteria
|
Pico and nano
|
Ciliates
|
|---|
|
Mesocosm experiments
|
|
2010
|
21 June
|
18
|
7.9 ± 2.1
|
3
|
2
|
0.4
|
1.71 ± 0.72
| |
ν
|
ν
|
|
5 July
|
21
|
36.5 ± 1.9
|
3
|
2
|
2.0
|
3.18 ± 2.08
| |
ν
| |
|
19 July
|
20
|
11.9 ± 2.2
|
3
|
2
|
1.2
|
4.60 ± 2.58
| |
ν
| |
|
3 August
|
19
|
52.5 ± 9.2
|
3
|
2
|
1.1
|
6.93 ± 2.17
| |
ν
|
ν
|
|
21 September
|
15
|
2.3 ± 0.9
|
3
|
2
|
14
|
13.27 ± 4.42
| | |
ν
|
|
13 October
|
13
|
24.7 ± 2.8
|
3
|
2
|
11
|
15.32 ± 6.34
| |
ν
| |
|
2011
|
28 June
|
19
|
16.1 ± 0.6
|
3
|
2
|
5.3
|
8.15 ± 2.90
|
ν
|
ν
|
ν
|
|
12 July
|
19
|
32.4 ± 1.1
|
3
|
2
|
23
|
11.81 ± 4.27
|
ν
|
ν
|
ν
|
|
27 July
|
18
|
33.0 ± 0.6
|
2
|
2
|
13
|
13.49 ± 5.58
|
ν
|
ν
|
ν
|
|
9 August
|
15
|
42.7 ± 6.5
|
2
|
2
|
31
|
17.49 ± 7.18
|
ν
|
ν
|
ν
|
|
7 Septembera
|
16
|
14.1 ± 18.2
|
2
|
2
|
78
|
20.04 ± 6.00
|
ν
|
ν
|
ν
|
|
Laboratory experiments
|
|
2012
|
5 June
|
16
|
50.5 ± 17.2
|
2
|
2
|
0.3
|
3.17 ± 0.73
|
ν
|
ν
| |
|
5 June
|
13
|
40.3 ± 13.1
|
2
|
2
|
0.2
|
1.48 ± 0.49
|
ν
|
ν
| |
|
13 June
|
16
|
7.9 ± 0.7
|
2
|
2
|
1.0
|
4.60 ± 0.54
|
ν
|
ν
| |
|
13 June
|
17
|
14.8 ± 7.9
|
2
|
2
|
0.7
|
3.06 ± 0.44
|
ν
|
ν
| |
|
14 June
|
17
|
22.0 ± 0.8
|
2
|
2
|
0.2
|
2.14 ± 0.42
|
ν
|
ν
| |
|
19 June
|
16
|
19.8 ± 12.6
|
2
|
2
|
1.0
|
4.96 ± 0.27
|
ν
|
ν
| |
|
20 June
|
12
|
27.7 ± 21.2
|
2
|
2
|
1.3
|
6.57 ± 0.63
|
ν
|
ν
| |
|
27 June
|
14
|
12.3 ± 0.8
|
2
|
2
|
1.0
|
4.20 ± 0.20
| |
ν
| |
|
27 June
|
15
|
12.6 ± 0.5
|
1
|
1
|
1.3
|
5.77 ± 0.23
| |
ν
| |
|
27 June
|
15
|
11.8 ± 0.9
|
1
|
1
|
1.3
|
7.16 ± 0.28
| |
ν
| |
|
28 June
|
15
|
11.9 ± 1.1
|
1
|
1
|
2.1
|
8.41 ± 0.24
| |
ν
| |
|
11 July
|
17
|
39.8 ± 0.8
|
1
|
1
|
2.5
|
7.40 ± 0.34
|
ν
|
ν
| |
|
11 July
|
16
|
40.3 ± 2.0
|
1
|
1
|
2.5
|
10.61 ± 0.35
|
ν
|
ν
| |
|
12 July
|
14
|
32.1 ± 1.7
|
2
|
2
|
3.3
|
12.03 ± 0.36
|
ν
|
ν
| |
|
7 August
|
21
|
75.6 ± 4.2
|
1
|
1
|
3.6
|
13.48 ± 0.42
|
ν
|
ν
| |
|
8 August
|
21
|
70.5 ± 3.5
|
2
|
2
|
7.1
|
15.03 ± 0.30
|
ν
|
ν
| |
|
5 September
|
20
|
56.4 ± 1.4
|
1
|
1
|
10
|
20.20 ± 0.43
| |
ν
| |
|
5 September
|
20
|
49.5 ± 1.0
|
1
|
1
|
10
|
25.37 ± 0.30
| |
ν
| |
|
5 September
|
19
|
49.5 ± 2.1
|
4
|
4
|
10
|
25.52 ± 0.21
| |
ν
| |
- Temp is the average water temperature during the experiment, Phyto is the average number of phytoplankton cells (pico- and nanophytoplankton) as counted with the flow cytometer in 103 cell per millilitre, N treatment and N control give the number of mesocosms incubated with mussels or kept as control respectively. In 2012, an experiment was sometimes repeated with the same mussels using new sea water; this is than indicated by a two. On the last experimental date in 2012, the average of four separate experiments with four individual mussels is given. The number of mussels present per experiment is given as the number of mussels per 100 L of water (100 L−1). Mean length gives the average shell length in millimetres of the juvenile mussels used per experiment. The last three columns indicate whether clearance rates were measured for each particular prey item on each date
-
aMussels originated from a different location than the artificial collector
