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Influence of trophic status and habitat in the distribution of diatoms in reservoirs of the Mid Tietê river/Alto Sorocaba basin (SP, Brazil).

Grant number: 13/14337-7
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): October 01, 2013
Effective date (End): September 30, 2017
Field of knowledge:Biological Sciences - Ecology - Ecosystems Ecology
Principal researcher:Denise de Campos Bicudo
Grantee:Elaine Cristina Rodrigues Bartozek
Home Institution: Instituto de Botânica. Secretaria do Meio Ambiente (São Paulo - Estado). São Paulo , SP, Brazil
Associated research grant:09/53898-9 - Paleolimnological reconstruction of Guarapiranga Reservoir and diagnosis of water and sediment current quality of SPMR water supply reservoirs facing their management, AP.TEM

Abstract

The Mid Tietê River/Alto Sorocaba basin (BMT/AS) is located in the Center-Southeast of São Paulo State, and comprises one of the most developed regions of the State. Most of the water supply in this region comes from reservoirs susceptible to anthropogenic impacts. Among the biological indicators of environmental changes, the use of diatoms has greatly increased in eutrophication studies. This project intends to analyze the spatial and temporal distribution of diatoms in different habitats (planktonic, periphytic and surface sediments) in four reservoirs with distinct trophic status from the BMT/AS (Barra Bonita, Itupararanga, Prainha and Ipaneminha reservoir), aiming to (a) evaluate the ecological quality of these systems, (b) compare the bioindicating potential of diatoms from distinct habitats, and (c) to broaden the knowledge on the distribution and ecology of tropical diatom species. In each reservoir three to four sampling stations will be established. Planktonic and periphytic diatoms will be sampled in the rainy and dry periods, and the surface sediments in the dry one. Samplings will include physical and chemical analysis for water and sediments. Water variables are: temperature, pH, electric conductivity, transparency, dissolved oxygen, alkalinity, nitrogen and phosphorus inorganic forms, total nitrogen and total phosphorus, soluble reactive silica and chlorophyll-a, and variables for sediments are: total organic carbon, total nitrogen and its stable isotopes (d13C e d15N), total phosphorous and granulometry. Diatom species will be identified and quantified. Ecological information of the taxa will be based on literature review, electronic addresses and the OMNIDIA program. Diversity indices will be calculated and associations of bioindicating species will be characterized. Data will be analyzed using multivariate statistical analysis (ordination, classification and clustering). The present proposal is pioneer for the Mid Tietê River basin and the second in Brazil to compare the bioindicating potential of diatoms from different habitats in reservoirs with distinct trophic status. As part of a larger project, it will provide limnological and ecological (diatoms) information to develop a regional database, targeting the development of an inferential model (diatom-phosphorus) presently nonexistent for tropical regions.

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
KRYSNA STEPHANNY DE MORAIS; ELAINE RODRIGUES BARTOZEK; STÉFANO ZORZAL-ALMEIDA; DENISE C. BICUDO; CARLOS EDUARDO DE MATTOS BICUDO. Taxonomia e ecologia da ordem Surirellales (Bacillariophyceae) em reservatórios tropicais no Sudeste do Brasil. Acta Limnol. Bras., v. 30, . (13/14337-7, 09/53898-9, 13/23703-7)
ZORZAL-ALMEIDA, STEFANO; BARTOZEK, ELAINE C. RODRIGUES; BICUDO, DENISE C.. Homogenization of diatom assemblages is driven by eutrophication in tropical reservoirs{*}. Environmental Pollution, v. 288, . (09/53898-9, 13/14337-7, 13/23703-7)
ZORZAL-ALMEIDA, STEFANO; RODRIGUES BARTOZEK, ELAINE C.; MORALES, EDUARDO A.; BICUDO, DENISE C.. Brachysira aristidesii sp. nov. (Bacillariophyceae, Brachysiraceae): a new species from oligotrophic and mesotrophic tropical reservoirs in southeastern Brazil. PHYTOTAXA, v. 456, n. 1, p. 105-113, . (13/23703-7, 13/14337-7, 09/53898-9)
LEHMKUHL, ELTON A.; MORALES, EDUARDO A.; TREMARIN, I, PRISCILA; BARTOZEK, ELAINE C. R.; ZORZAL-ALMEIDA, STEFANO; LUDWIG, V, THELMA A.; BICUDO, CARLOS E. DE M.. Two new species of Nitzschia (Bacillariaceae, Bacillariophyta) from tropical reservoirs of southeastern Brazil. PHYTOTAXA, v. 399, n. 1, p. 83-99, . (13/23703-7, 09/53898-9, 13/14337-7)
BARTOZEK, ELAINE C. R.; DA SILVA-LEHMKUHL, ANGELA M.; GREGORY-EAVES, IRENE; BICUDO, DENISE C.. Environmental and spatial drivers of diatom assemblages in the water column and surface sediment of tropical reservoirs. JOURNAL OF PALEOLIMNOLOGY, v. 62, n. 3, p. 245-257, . (09/53898-9, 13/14337-7)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
BARTOZEK, Elaine Cristina Rodrigues. Influência do estado trófico e do habitat na distribuição das diatomáceas em represas do Médio Rio Tietê/Alto Sorocaba (SP, Brasil). 2017. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Instituto de Biociências. Rio Claro Rio Claro.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.