PELD-ELPA | Phytoplankton and water quality parameters in the Patos Lagoon estuary and adjacent marine coast
PELD - ELPA | Programa Pesquisa Ecológica de Longa Duração no Estuário da Lagoa dos Patos e Costa Marinha Adjacente
Description
Phytoplankton and water quality parameters are analyzed monthly since 1993 at two stations in the Patos Lagoon Estuary and at one station in the surf zone of the adjacent Cassino Beach. This data series provides unique long-term information enabling the evaluation of natural and anthropic impacts in the estuarine and coastal region in southern Brazil.
Geographic Description
The Patos Lagoon at the southern Brazilian coastal plain (Rio Grande do Sul state) is the largest (10,360 km2) choked lagoon in the world stretching in a NE SW direction from the city of Porto Alegre (30°30’ S) to Rio Grande (32°12’ S). In the southern estuarine region, approximately 10 % of total area, a single and narrow inlet connects this lagoon to the Atlantic Ocean. The major tributary rivers at the northern and central areas of Patos Lagoon, and the São Gonçalo Channel at the southern area, are significant freshwater sources from an extensive drainage basin. The hydrodynamics of the Patos Lagoon estuary is strongly controlled by the discharge of tributary rivers and the action of predominant meteorological factors like winds, rainfall and evaporation.
Purpose
The general purposes of this data bank are to provide information on long term studies developed in the Patos Lagoon estuary.
Data quality
Responsible researchers and the classical methods are the same employed since the beginning of the time series. Thus, methodology influence is minimal. Technical assistance for sampling and nutrient analysis changed during the years, and also of phytoplankton counting (six persons), always under supervision of the responsible researchers.
Methods
The following physical water parameters are obtained in situ: temperature (mercury thermometer); salinity (optical refractometer or conductivity meter Yellow Spring, mod. 33 SCT); water transparency (Secchi disk). Surface water is sampled with a bucket and stored in the dark in plastic bottles for the analysis of dissolved inorganic nutrients and chlorophyll-a in the laboratory. For phytoplankton counting, surface water samples are stored in amber glass bottles and fixed with lugol´s solution (2%). Plankton is also concentrated by horizontal tows using a 20 micrometer mesh size plankton net and stored in glass bottles fixed with fomaldehyde (4%) neutralized with hexamethylentetramine.
Citation
Odebrecht C, Abreu P C (2018): PELD-ELPA Phytoplankton and water quality parameters in the Patos Lagoon estuary and adjacent marine coast. v1.10. Sistema de Informação sobre a Biodiversidade Brasileira - SiBBr. Dataset/Samplingevent. https://ipt.sibbr.gov.br/peld/resource?r=phytoplankton_and_water_quality_parameters_in_the_patos_lagoon_estuary_and_adjacent_marine_coast&v=1.10
Rights
This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License.
Data generalisations
To evaluate variations on the Patos Lagoon estuary biota in response to hidrological long-term changes related to climatic events and anthropic action. The Patos Lagoon at the southern Brazilian coastal plain (Rio Grande do Sul state) is the largest (10,360 km2) choked lagoon in the world stretching in a NE SW direction from the city of Porto Alegre (30°30’ S) to Rio Grande (32°12’ S). In the southern estuarine region, approximately 10 % of total area, a single and narrow inlet connects this lagoon to the Atlantic Ocean. The major tributary rivers at the northern and central areas of Patos Lagoon, and the São Gonçalo Channel at the southern area, are significant freshwater sources from an extensive drainage basin. The hydrodynamics of the Patos Lagoon estuary is strongly controlled by the discharge of tributary rivers and the action of predominant meteorological factors like winds, rainfall and evaporation. The sampling area on the Patos Lagoon estuary extends from the inner shallow area of the estuary, channel environment and the adjacent oceanic beach. Different sampling strategies are used, according to the goals and characteristics of the abiotic and biotic data to be obtained. Meteorological data, current and climatic indexes are also used. Terrestrial and aquatic vehicles are used for sampling.
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Click to view records for the PELD-ELPA | Phytoplankton and water quality parameters in the Patos Lagoon estuary and adjacent marine coast resource.Metadata last updated on 2024-06-10 17:27:50.0
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