Abstract
In this paper, data on the fauna of Ephemeroptera and Trichoptera (ET) from
a Cerrado stream was analysed in order to test the hypothesis that the high
seasonality of this biome can influence the composition of ET between the
wet and dry seasons. The community structure was evaluated using Detrended
Correspondence Analysis and Cluster Analysis (Morisita Horn-UPGMA).
Environmental factors were analyzed using the Principal Components Analysis.
In order to test the effect of abiotic variables on the fauna, It was applied the
Procrustean Randomization Test (Protest) and Mantel Test. The environmental
factors recorded for this study had a significant effect on the ET fauna from
Córrego do Pedregulho. Faunal similarity was high throughout the year, indicating
that although there was density of fluctuation, due to rainfall variation, the faunal
composition showed little temporal variability. On the other hand, it was possible
to observe that the genus Lachlania (Ephemeroptera) occurred preferably during
the rainy months and that the faunal composition during the dry season was less
variable than those from other seasons. Therefore, environmental seasonality had
a partial effect on the faunal composition of ET from Córrego do Pedregulho.
a Cerrado stream was analysed in order to test the hypothesis that the high
seasonality of this biome can influence the composition of ET between the
wet and dry seasons. The community structure was evaluated using Detrended
Correspondence Analysis and Cluster Analysis (Morisita Horn-UPGMA).
Environmental factors were analyzed using the Principal Components Analysis.
In order to test the effect of abiotic variables on the fauna, It was applied the
Procrustean Randomization Test (Protest) and Mantel Test. The environmental
factors recorded for this study had a significant effect on the ET fauna from
Córrego do Pedregulho. Faunal similarity was high throughout the year, indicating
that although there was density of fluctuation, due to rainfall variation, the faunal
composition showed little temporal variability. On the other hand, it was possible
to observe that the genus Lachlania (Ephemeroptera) occurred preferably during
the rainy months and that the faunal composition during the dry season was less
variable than those from other seasons. Therefore, environmental seasonality had
a partial effect on the faunal composition of ET from Córrego do Pedregulho.
| Translated title of the contribution | Does environmental seasonality affect the faunal composition of Ephemeroptera and Trichoptera in a Cerrado stream from southeastern Brazil? |
|---|---|
| Original language | Undefined |
| Pages (from-to) | 73-84 |
| Number of pages | 12 |
| Journal | Ambiência |
| Volume | 8 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2012 |
Keywords
- aquatic insects
- streams
- multivariate analysis
- Procrustean Randomization Test (Protest)
- Mantel Test