O₂ consumption rates.

<p>O₂ consumption rates of A: light-exposed tiles and B: shaded tiles in µg cm⁻² h⁻¹ (means±SE). P-values are calculated from 3-factorial ANOVA and originate from analysis across the whole study period (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0066992#pone-0066992-t005" target="_blank">Table 5</a> for full test results). Significant p-values (p<0.05) are indicated by asterisks. Abbreviations: C = Cage, F = Fertilizer, T = Time.</p

Results of the 3-factorial ANOVA of the water parameters.

<p>Response variables (1^st row) are chlorophyll <i>a</i>, particulate organic nitrogen (PON), particulate organic carbon (POC), dissolved organic nitrogen (DON), dissolved organic carbon (DOC). Independent factors (1^st column) are Cage (C), Fertilizer (F), and Time (T). Significant results are indicated by asterisks. P-values of 0.000 symbolize values <0.001. Dashes represent factors that have been excluded by the model reduction.</p

Results of the 3-factorial ANOVA of O₂ consumption of exposed and shaded tiles.

<p>Response variables are shown in the 1^st row. In the 1^st column are the independent factors: Cage (C), Fertilizer (F), and Time (T). Significant results are indicated by asterisks. P-values of 0.000 symbolize values <0.001 and dashes represent factors that have been excluded by the model reduction. n.s. = not significant.</p

Development of algal dry mass (A), organic carbon (B), nitrogen content (C), and organic C_/N ratio (D) on light-exposed tiles.

<p>Shown are means±SE of all treatments in mg cm⁻² over the 5 sampling points after 1, 2, 4, 8 and 16 wk(s). P-values were calculated from a 3-factorial ANOVA and originate from analysis across the whole study period (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0066992#pone-0066992-t001" target="_blank">Table 1</a> for full results). P-values were tagged as n.s. ( = not significant), when the model reduction step excluded the corresponding factor(s). Missing connections between data points are due to insufficient algal material for analysis. Abbreviations: C = Cage, F = Fertilizer, T = Time.</p

Results of 3-factorial generalized linear model (GLM; binomial distribution and logit function) of functional algal groups of light-exposed tiles.

<p>Response variables are shown in the 1^st row and in the first column the independent factors: Cage (C), Fertilizer (F), and Time (T). Significant results are indicated by asterisks. P-values of 0.000 symbolize values <0.001. Dashes represent factors that have been excluded by the model reduction and ‘x’ stands for insufficient data for analysis.</p

Results of 3-factorial generalized linear model (GLM; binomial distribution and logit function) of functional algal groups of light shaded tiles.

<p>Response variables are shown in the 1^st row and in the first column the independent factors: Cage (C), Fertilizer (F), and Time (T). Significant results are indicated by asterisks. P-values of 0.000 symbolize values <0.001. Dashes represent factors that have been excluded by the model reduction and ‘x’ stands for insufficient data for analysis.</p

Inorganic nutrient (A) and Chlorophyll <i>a</i> (B) concentrations.

<p>A: Inorganic nutrient concentrations (µmol L⁻¹; means±SE) in the nutrient enrichment treatments (fertilizer & combined) and the non-enriched treatments (control & cage). Small letters (a for SRP; b for DIN) indicate statistical significant differences between enriched and non-enriched plots of p<0.05 (t-test). DIN: dissolved inorganic nitrogen; SRP: soluble reactive phosphate. B: Chlorophyll <i>a</i> concentrations (µg L⁻¹, means±SE) from water samples taken directly above the tile setups at all 5 sampling times. P-values were calculated from 3-factorial ANOVA and originate from analysis across the whole study period (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0066992#pone-0066992-t001" target="_blank">Table 1</a> for full results). P-values were tagged as n.s. ( = not significant), when the model reduction step excluded the corresponding factor(s).</p

Results of the 3-factorial ANOVA of the algal parameters.

<p>Response variables (1^st row) are algal dry mass, algal organic C, algal N of the exposed tiles. Independent factors (1^st column) are Cage (C), Fertilizer (F), and Time (T). Algal dry mass data were log (x+1) transformed to meet parametric assumptions. Significant results are indicated by asterisks. P-values of 0.000 symbolize values <0.001. Dashes represent factors that have been excluded by the model reduction.</p

Similan Islands.

<p>Insert: location of Similan Islands (black square) within the Andaman Sea; big map: orientation of Similan island chain; Numbers of investigated islands are given (#); the principal investigation sites are at island 4 named Ko Miang.</p

Concentrations of particulate and dissolved organic matter.

<p>Particulate (mg cm⁻², means±SE) and dissolved organic matter concentrations (µmol L⁻¹, means±SE) in water samples taken directly above the installations A: particulate organic nitrogen (PON), B: particulate organic carbon (POC), C: dissolved organic nitrogen (DON), and D: dissolved organic carbon (DOC). Shown are data of all treatments for all 5 sampling times. P-values were calculated from 3-factorial ANOVA and originate from analysis across the whole study period (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0066992#pone-0066992-t001" target="_blank">Table 1</a> for full results). Abbreviations: C = Cage, F = Fertilizer, T = Time. Missing values of 1wk for PON and POC resulted from insufficient algal dry mass for analysis. Shown P-values originate from analysis across the whole study period. P-values were tagged as n.s. ( = not significant), when the model reduction step excluded the corresponding factor(s).</p