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| Author(s): |
Bruno Paes De Carli
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Sorocaba. 2016-03-31. |
| Institution: | Universidade Estadual Paulista (Unesp). Instituto de Ciência e Tecnologia. Sorocaba |
| Defense date: | 2016-02-12 |
| Advisor: | Marcelo Luiz Martins Pompêo |
| Abstract | |
The Cantareira System comprises a series of five dams located in distinct watershed, mainly responsible for water supply in the Metropolitan Region of Sao Paulo state. Due to water crisis in the area, its necessary to develop studies that describe environmental conditions and possible interference. In this sense, the zooplankton community is being used such as biomonitoring tool. However, the zooplankton is considered an important component of the energy flow in ecosystem. Therefore, this study aimed to characterize the zooplankton community in five reservoirs of the Cantareira System (Jaguari, Jacarei waterfall Atibainha and Paiva Castro) and associate biological data with the limnological variables in order to diagnose changes in environmental conditions. Samples were collected during the dry (May and June) and rainy season (November and December) of 2013 in 19 sampling points. Temperature, electrical conductivity, pH and dissolved oxygen were measured in situ with multi-parameter probe. Nutrients, suspended matter and the pigments were determined in the laboratory. Zooplankton samples were collected in the photic zone through vertical hauling with 68 µm net. Results showed eutrophication in Jaguari reservoir and some physico-chemical variables not agreement the limit established by law. Although the Cantareira System classified as multi-system, a pattern similar to the cascade of reservoirs was observed. Regarding the zooplankton, the rotifer group demonstrate higher species richness, however scarcely representative in biomass. Cyclopoids were more abundant in the dry season, while the Cladocera exceeded the other groups during the rainy. An positive trend for Cyclopoida density and trophic status were associated. The occurrence of invasive rotifer Kellicotia Bostoniensis and exotic algae Ceratium furcoides (Levander) Langhans 1925 were registred. Juveniles of copepods and Bosmina freyi were more abundant in the survey conducted. Crustaceans Calanoida showed the highest biomass values than the other groups. Based on the analysis, the spatial and temporal distribution were demonstrated. Most sampling points demonstrate moderate impact and water quality ranging from regular and poor. In this case, features such as water residence time and the morphometry, trophic status, ecological interactions are the main factors that could imply in changes in zooplankton composition. (AU) | |
| FAPESP's process: | 14/04471-0 - Spatial and temporal heterogeneity of the zooplankton community in Cantareira System, São Paulo, Brazil |
| Grantee: | Bruno Paes de Carli |
| Support Opportunities: | Scholarships in Brazil - Master |