non-Metric multidimensional scaling ordinations (nMDS plots) on the basis of the Bray-Curtis dissimilarity measure of abundance in (A) Carapa-60 and (B) Saltito-100.

<p>non-Metric multidimensional scaling ordinations (nMDS plots) on the basis of the Bray-Curtis dissimilarity measure of abundance in (A) Carapa-60 and (B) Saltito-100.</p

Akaike Information Criterion (AICc) model results for the composition and structure of macroinvertebrate assemblages.

<p>Model were ranked using Delta AIC. The column “Signal” indicates the direction, (+) positive and (-) negative, of the effect. The column “Model Parameters” indicates if the effects are (*) multiplicative or (+) additive. K, number of parameters in the model; AICc Wt, AIC weight; Cum. Wt, Cumulative AIC weight.</p

Monthly temporal patterns of environmental variables between 1997 to 2011 in Carapa-60 (Black line) and Saltito-100 (Gray line).

<p>Monthly temporal patterns of environmental variables between 1997 to 2011 in Carapa-60 (Black line) and Saltito-100 (Gray line).</p

ANOSIM analysis results among groups formed in nMDS plots.

<p>ANOSIM analysis results among groups formed in nMDS plots.</p

Mean and standard deviation of the main environmental variables identified by AIC for each group.

<p>Mean and standard deviation of the main environmental variables identified by AIC for each group.</p

non-Metric multidimensional scaling ordinations (nMDS plots) on the basis of the Bray-Curtis dissimilarity measure of presence/absence of macroinvertebrates in (A) Carapa-60 and (B) Saltito-100.

<p>non-Metric multidimensional scaling ordinations (nMDS plots) on the basis of the Bray-Curtis dissimilarity measure of presence/absence of macroinvertebrates in (A) Carapa-60 and (B) Saltito-100.</p

Monthly temporal patterns of climate and environmental variables between 1997 to 2011 in Carapa-60 (Black line) and Saltito-100 (Gray line).

<p>Last four graphs show overall patterns for both streams.</p

Long term fluctuations in taxonomic richness, abundance and biomass in Carapa-60 (A, C, E) and Saltito-100 (B, D, F).

<p>Gray area shows 8y of P-enrichment in Carapa-60.</p

Appendix B. Phosphorus excretion estimates by species and stream for the model: log10 (SRP excretion) ~ log10 (wet mass).

Phosphorus excretion estimates by species and stream for the model: log10 (SRP excretion) ~ log10 (wet mass)

Appendix C. Model selection criteria for N and P excretion rates and N:P excretion ratio.

Model selection criteria for N and P excretion rates and N:P excretion ratio