ResultsSpecies compositionIn total,

Results

Species composition

In total, 206 species of desmids and 105 diatom species were recovered from the peatland samples (Supplementary Tables 2 and 3). The Procrustes analysis of the NMDS ordinations of desmid and diatom datasets demonstrated their non-random congruence (Procrustes correlation r = 0.77, P < 0.001; Fig. 1). However, the relatively large residual distances among identical sites in both ordinations suggested that the community structure of desmids and diatoms did not follow exactly the same patterns relative to the abiotic and spatial factors. This was confirmed by further analyses. The species composition of desmids was most tightly controlled by the pH values of localities (Table 1). The permutational MANOVA model explained approximately 43% of the variation in the species data. Conductivity was the second most important factor, while the effect of spatial distance among localities on the species composition of desmids was also significant. The ombro-minerotrophy gradient and Ca concentrations were correlated with the pH values (Table 2), but they did not account for much of the additional variation in the desmid species data that was not related to the pH gradient (Table 1). However, the effect of the ombro-minerotrophy gradient was still marginally significant, even after accounting for the effect of pH. The other abiotic factors had no significant effects on the species composition of desmids in the samples. The species composition of diatoms was also primarily controlled by pH (Table 1). The permutational MANOVA model accounted for about 55% of the total variation. Similar to the desmids, conductivity and spatial distance had the second and third most significant effects on the species composition, which were not related to the pH gradient (Table 1). The ombro-minerotrophic gradient and Ca concentrations, i.e., two abiotic factors that were largely covered by the variation in the pH values, were also marginally significant. The effects of other factors, including the total nitrogen and phosphorus, were not significant.

Hasil (Bahasa Indonesia) 1:

HasilKomposisi spesiesIn total, 206 species of desmids and 105 diatom species were recovered from the peatland samples (Supplementary Tables 2 and 3). The Procrustes analysis of the NMDS ordinations of desmid and diatom datasets demonstrated their non-random congruence (Procrustes correlation r = 0.77, P < 0.001; Fig. 1). However, the relatively large residual distances among identical sites in both ordinations suggested that the community structure of desmids and diatoms did not follow exactly the same patterns relative to the abiotic and spatial factors. This was confirmed by further analyses. The species composition of desmids was most tightly controlled by the pH values of localities (Table 1). The permutational MANOVA model explained approximately 43% of the variation in the species data. Conductivity was the second most important factor, while the effect of spatial distance among localities on the species composition of desmids was also significant. The ombro-minerotrophy gradient and Ca concentrations were correlated with the pH values (Table 2), but they did not account for much of the additional variation in the desmid species data that was not related to the pH gradient (Table 1). However, the effect of the ombro-minerotrophy gradient was still marginally significant, even after accounting for the effect of pH. The other abiotic factors had no significant effects on the species composition of desmids in the samples. The species composition of diatoms was also primarily controlled by pH (Table 1). The permutational MANOVA model accounted for about 55% of the total variation. Similar to the desmids, conductivity and spatial distance had the second and third most significant effects on the species composition, which were not related to the pH gradient (Table 1). The ombro-minerotrophic gradient and Ca concentrations, i.e., two abiotic factors that were largely covered by the variation in the pH values, were also marginally significant. The effects of other factors, including the total nitrogen and phosphorus, were not significant.