| Full text | |
| Author(s): |
Gisele Carolina Marquardt
[1]
;
Carlos Eduardo de Mattos Bicudo
[2]
;
Thelma Alvim Veiga Ludwig
[3]
;
Luc Ector
[4]
;
Carlos E. Wetzel
[5]
Total Authors: 5
|
| Affiliation: | [1] Instituto de Botânica. Núcleo de Pesquisas em Ecologia - Brasil
[2] Instituto de Botânica. Núcleo de Pesquisas em Ecologia - Brasil
[3] Universidade Federal do Paraná. Departamento de Botânica - Brasil
[4] Luxembourg Institute of Science and Technology. Environmental Research and Innovation Department
[5] Luxembourg Institute of Science and Technology. Environmental Research and Innovation Department
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Acta Limnol. Bras.; v. 30, 2018-11-14. |
| Abstract | |
Abstract Aim Relationships between species composition and variation patterns in diatom assemblages over six tropical reservoirs located in Southeast Brazil were explored. Methods Surface-sediment and phytoplankton diatom assemblages were determined and Canonical Correspondence Analysis was used to verify the set of environmental variables that best explain the species composition variation among sites. Results A total of 28 diatom taxa representing 20 genera were identified using light and scanning electron microscopy. Information on their ecological preferences was also provided. Humidophila biscutella is reported for the first time in Brazil whereas Sellaphora sassiana and Humidophila brekkaensis are reported for the first time in São Paulo State. Three groups of potential water quality indicators were delineated: the first suggests oligotrophic conditions, the second is related to cold waters with low luminosity in a mixing regime, and the third is a small group of tolerant species occurring in water with high conductivity, pH and total phosphorus conditions. Conclusion present study provided the first insight into the general diatom communities over six tropical reservoirs in Southeast Brazil and provided information on their ecology and distribution aiming bioassessment. The potential of water quality indicator diatom groups here outlined are in line with those reported in the literature and reinforce the importance of PEJU for the maintenance of ecological quality of reservoirs and reference conditions for the Metropolitan Region of São Paulo water sources. (AU) | |
| 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: | 13/10314-2 - Comparison of biodiversity and distribution of planktonic diatoms, periphytic and surface sediments in six reservoirs in the southern state of São Paulo |
| Grantee: | Gisele Carolina Marquardt |
| Support Opportunities: | Scholarships in Brazil - Doctorate |