Table 1 ANOVA examining the effect of treatment on A) Total change in sponge buoyant weight at the end of the observational phase, B) Changes in surface area for each species at the end of experimental and observational periods (surface area was not considered a relevant metric for growth of C. orientalis), and C) Chl a concentration at the end of the 28 d experimental period.

From: Effects of light attenuation on the sponge holobiont- implications for dredging management

Source

df

Stylissa flabelliformis

Ianthella basta

Cymbastela coralliophila

Carteriospongia foliascens

Cliona orientalis

F

P

F

P

F

P

F

P

F

P

(A) Buoyant weight at the end of the observational phase

Treatment

3

1.923

0.204

1.377

0.318

1.902

0.208

0.691

0.586

9.506

0.005

Error

8

          

Significant Pairwise Multiple Comparisons (Holm-Sidak)

0,0.8,3.2 > 8.1

(B) Surface area at the end of the experimental and observational phases

Experimental phase

Treatment

4

2.271

0.093

1.199

0.338

0.310

0.869

1.695

0.186

  

Error

23

          

Observational phase

Treatment

3

1.789

0.227

1.330

0.331

0.943

0.464

4.186

0.047

  

Error

8

          

Significant Pairwise Multiple Comparisons (SNK)

8.1, NL, 3.2 > 0

  

(C) Chl a at the end of the experimental phase

Treatment

6

1.792

0.173

1.472

0.257

6.072

0.003

31.163

 < 0.001

17.271

 < 0.001

Error

14

          

Significant Pairwise Multiple Comparisons (SNK)

NL,F, T0 > 0

T0,NL,F > 8.1,3.2,0.8 > 0

NL,F,8.1,3.2,0.8 > 0

  1. Holm-Sidak and Student Newman-Keuls (SNK) tests have been performed for significant pairwise multiple comparisons. In pair-wise tests, F: field control; t = 0: time 0 control; 0, 0.8, 3.2 and 8.1 mol photons m−2 d−1 treatments and natural light controls (NL).
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