| Full text | |
| Author(s): |
Krysna Stephanny de Morais
[1]
;
Elaine Rodrigues Bartozek
[2]
;
Stéfano Zorzal-Almeida
[3]
;
Denise C. Bicudo
[4]
;
Carlos Eduardo de Mattos Bicudo
[5]
Total Authors: 5
|
| Affiliation: | [1] Instituto de Botânica de São Paulo. Departamento de Ecologia. Laboratório de Ecologia Aquática - Brasil
[2] Universidade Estadual Paulista Julio de Mesquita Filho. Instituto de Biociências - Brasil
[3] Instituto de Botânica de São Paulo. Departamento de Ecologia. Laboratório de Ecologia Aquática - Brasil
[4] Instituto de Botânica de São Paulo. Departamento de Ecologia. Laboratório de Ecologia Aquática - Brasil
[5] Instituto de Botânica de São Paulo. Departamento de Ecologia. Laboratório de Ecologia Aquática - Brasil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Acta Limnol. Bras.; v. 30, 2018-11-14. |
| Abstract | |
Abstract Aim The aim of this study was to inventory the diatom species of order Surirellales present in the surface sediments of tropical reservoirs (São Paulo State, Brazil) and to correlate their distribution with environmental (pH, total phosphorus, and total nitrogen) and spatial predictors. Methods Samplings were carried out in 31 reservoirs from 2009 to 2014. Vertical profile of water samples was collected in the summer and winter along the reservoirs, and their water column mean results were used to characterize each sampling site. We measured water transparency, euphotic zone, water depth, pH, dissolved oxygen, total nitrogen, and total phosphorus. Surface sediment samples (2 cm top) were collected for diatom analyses. A partial RDA was performed between species abundance data (response matrix) and environmental and spatial variables (predictor matrices). Results 14 species of Surirellales were identified from the surface sediment samples, five of them being identified only at the genus level. Overall, partial RDA showed that the species distribution is constrained by both environmental and spatial predictors. Species were mainly ordinated in relation to pH and light availability. Conclusion Our results demonstrated that the Surirellales species revealed ecological preferences to low nutrient concentrations, neutral to slightly acidic waters, and higher light availability. Moreover, our results suggest that both environmental and spatial factors are important for their species distribution. (AU) | |
| FAPESP's process: | 13/23703-7 - Biodiversity and distribution of diatoms and their use as bioindicators of the quality of the reservoirs in Piracicaba River basin and Cantareira System |
| Grantee: | Stéfano Zorzal de Almeida |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 09/53898-9 - Paleolimnological reconstruction of Guarapiranga Reservoir and diagnosis of water and sediment current quality of SPMR water supply reservoirs facing their management |
| Grantee: | Carlos Eduardo de Mattos Bicudo |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 13/14337-7 - Influence of trophic status and habitat in the distribution of diatoms in reservoirs of the Mid Tietê river/Alto Sorocaba basin (SP, Brazil). |
| Grantee: | Elaine Cristina Rodrigues Bartozek |
| Support Opportunities: | Scholarships in Brazil - Doctorate |