PELD - ELPA | Dynamics of Submerged Aquatic Vegetation in the Patos Lagoon estuary
Citation
Copertino M (2024). PELD - ELPA | Dynamics of Submerged Aquatic Vegetation in the Patos Lagoon estuary. Universidade Federal do Rio Grande. Sampling event dataset https://doi.org/10.15468/gwfd3n accessed via GBIF.org on 2024-09-07.Description
The monitoring study aims to investigate long term changes in Submerged Aquatic Vegetation (SAV) abundance and composition of the Patos Lagoon estuary, and their possible relationship with regional climate and hydrology. By providing a 20 year long time series of Ruppia maritima habitats and attached macroalgae, the temporal series are providing field basis and evidences to study the consequences of climate variability and climate changes in these communities.Sampling Description
Study Extent
The studied meadow covers approximately 1000m2 from a shallow estuarine area (mesomixohaline region) of the Patos Lagoon estuary. The sampling design aims to cover the center of the meadow and their edges. The meadow is surveyed monthly along a 450m fixed transect. The meadow is marked in six fixed positions, with fixed wodden posts buried into the sediemt. The transect line is parallel to the coast, distant 500m of an estuarine Island (Pombas Island). This site has been continuously monitored since January 2000. The data inserted in the data basis covers the monthly average, from Janaury 2000 to May 2016.Sampling
Sampling description: The SAV was monthly monitored within a meadow in six points along a 450m transect area. The transect is 450 m long and about 2 m wide In each sampling area, the percentage cover of macroalgae were visually estimated within 25x 25 cm quadrats (N=3). The SAV biomass were sampled by using cylindrical cores, buried into the sediment (ø 10cm, 15 cm depth) (N=3 per plot; total N=18). The samples were previously washed in the field with the help of sieves, packed and transported to the laboratory with ice. In the laboratory, the biomass samples are washed and cleaned from sediments, debris and associated fauna. The plant biomass is divided into their functional groups: rooted plants, macroalgae and epiphyte algae. The rooted plants are divided into bellowground and aboveground fractions. Plant development and phenology is also recorded. Epiphyte algae are removed from the leaves, by scraping the leaves with a surgical blade. Several demographic parameters are obtained for the rooted plants such as: hast length, leaves length, number of shoots, total rhizome length, number of nodes along the rhizome. The dry weight (48 h at 60°C) is obtained for Ruppia maritima (bellowground and aboveground) and for the group of macroalgae. Taxonomical analyses of macroalgal were performed by thallus anatomy using stereomicroscopy and optical microscopy.Quality Control
Samples were collected by the Project Coordinator, Post-Docs, Post-Graduate and trainned undergraduated students. The methodoligical approach and methods were the same along during the 16 years time. The quality of data was checked monthly by the VAS Project Coordinator.Method steps
- SAV (plants and macroalgae) is surveyed for cover, biomass and demographic parameters. In the field, the presence of the meadow and the percentage cover is visually estimated. The plants are manually collected by cores, stored in refrigerator and analysed in 2 to 5 days. Plant dry biomass ad organic matter is obtained.
Taxonomic Coverages
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Ruppia maritimarank: species
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Plantaerank: kingdom
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Viridiplantaerank: subkingdom
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Tracheophytarank: phylum
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Chlorophytarank: phylum
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Rodophytarank: phylum
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Monocotsrank: class
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Ulvophyceaerank: class
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Florideophyceaerank: class
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Alismatalesrank: order
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Ulvalesrank: order
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Cladophoralesrank: order
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Acrochetialesrank: order
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Ceramialesrank: order
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Ruppiaceaerank: family
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Ulvaceaerank: family
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Cladophoraceaerank: family
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Acrochaetiaceaerank: family
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Rhodomelaceaerank: family
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Ruppiarank: genus
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Ulvarank: genus
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Rhizocloniumrank: genus
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Cladophorarank: genus
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Chaetomorpharank: genus
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Rhizocloniumrank: genus
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Polysiphoniarank: genus
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Acrochaetiumrank: genus
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Ulva intestinalisrank: species
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Ulva compressarank: species
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Ulva clathratarank: species
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Ulva ramulosarank: species
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Ulva sprank: species
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Rhizoclonium ripariumrank: species
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Cladophora ssp
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Chaetomorpha antenninarank: species
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Chaetomorpha sprank: species
Geographic Coverages
The Patos Lagoon at the extreme southern Brazilian coastal plain (Rio Grande do Sul State) is the largest (10,360 km2) choked lagoon in the world and second largest lagoon in South America. The lagoon streches along 290 km long in a NE-SW direction, between the city of Porto Alegre (30º30’ S) and Rio Grande (32º12’ 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 Patos Lagoon estuary is strongly controlled by the discharge of tributary rivers and the action of predominant meteorological factors like winds, rainfall and evaporation.
Bibliographic Citations
Contacts
Margareth Copertinooriginator
position: Researcher
FURG - University of Rio Grande
Av. Itália Km 08 P.O. Box 474
Rio Grande
96205001
Rio Grande do Sul
BR
email: doccoper@furg.br
userId: http://scholar.google.com/citations?user=00
Margareth Copertino
metadata author
position: Researcher
FURG - University of Rio Grande
Av. Itália Km 08 P.O. Box 474
Rio Grande
96205001
Rio Grande do Sul
BR
email: doccoper@furg.br
userId: http://scholar.google.com/citations?user=00
Margareth Copertino
principal investigator
position: researcher
FURG - University of Rio Grande
Av. Itália Km 08 P.O. Box 474
Rio Grande
96205001
Rio Grande do Sul
BR
email: doccoper@furg.br
Clarisse Odebrecht
point of contact
position: researcher
FURG - University of Rio Grande
Av. Itália Km 08 P.O. Box 474
Rio Grande
96205001
Rio Grande do Sul
BR
Telephone: +555332336520
email: doclar@furg.br
Eduardo Resende Secchi
point of contact
position: Researcher and Coordinator of the Brazilian Long Term Ecological Research (PELD Site 8)
FURG - University of Rio Grande
Av. Itália Km 08 P.O. Box 474
Rio Grande
96205001
Rio Grande do Sul
BR
Telephone: 5332336538
email: edu.secchi@furg.br
Valéria Marques Lemos
administrative point of contact
position: Researcher
FURG - University of Rio Grande
Av. Itália Km 08
Rio Grande
96205001
Rio Grande do Sul
BR
email: vavadeleom@yahoo.com.br
userId: http://scholar.google.com/citations?user=00
Marianna Lanari
administrative point of contact
position: Researcher
FURG - University of Rio Grande
Av. Itália Km 08
Rio Grande
96205001
Rio Grande do Sul
BR
email: marianna.lanari@gmail.com
userId: http://scholar.google.com/citations?user=00