Toxic blooms of cyanobacteria in the Patos Lagoon Estuary, southern Brazil

1996 ◽  
Vol 5 (4) ◽  
pp. 223-229 ◽  
Author(s):  
J. S. Yunes ◽  
P. S. Salomon ◽  
A. Matthiensen ◽  
K. A. Beattie ◽  
S. L. Raggett ◽  
...  
Keyword(s):  
Southern Brazil ◽  
Patos Lagoon ◽  
Patos Lagoon Estuary ◽  
Toxic Blooms

scholarly journals effect of short-term meteorological disturbances on the submerged aquatic vegetation and associated fauna in the Patos Lagoon estuary, southern Brazil

2021 ◽  
Vol 1 (2) ◽  
pp. 63-71
Author(s):  
Dairana Misturini ◽  
Marianna Lanari ◽  
Valéria Lemos ◽  
Leonir André Colling
Keyword(s):  
Submerged Aquatic Vegetation ◽  
Aquatic Vegetation ◽  
Extreme Weather Events ◽  
Vegetation Coverage ◽  
Southern Brazil ◽  
Associated Fauna ◽  
Short Term ◽  
Patos Lagoon ◽  
Standard Format ◽  
Patos Lagoon Estuary

Occluded fronts are naturally cyclogenic areas that have been intensified by global warming. Studies evaluating the effects of occluded fronts in the submerged aquatic vegetation (SAV) and its associated fauna in shallow estuarine areas may provide insights on the impacts of climate change-induced extreme weather events on coastal ecosystems functioning. The present dataset describes data on benthic fauna and flora in the Patos Lagoon Estuary (PLE), in southern Brazil, seasonally obtained during intense occluded fronts. Using a hierarchical sample design, based on Beyond BACI protocols (Before/After and Control/Impact), fauna and flora were sampled before and after four occluded fronts passage throughout 2019.Three habitats were sampled: SAV Meadow, SAV Edge and adjacent Sandflat. A total of 432 macrozoobenthic samples (216 samples for stratum); 216 samples for bellow and aboveground biomass, vegetation coverage, canopy height and marine macrophytes morphology; 144 samples by sedimentology and organic matter; 72 water column depth measurements; and 8 temperature and salinity measurements were collected during the study period. The data is available at the Global Biodiversity Information Facility (GBIF), in Darwin Core standard format (DwC), organized according to the OBIS-ENV-DATA model, with CC-BY-NC-4-0 license for use. The present dataset adds to the comprehension of the temporal variability of estuarine benthic communities in subtropical systems, and how short-term meteorological process can affect zoo and fitobenthic communities in the context of climate changes.

scholarly journals Abundance, breeding and food of the Little Blue Heron Egretta caerulea (Aves, Ardeidae) in the Patos Lagoon estuary, a recently colonized area in southern Brazil

2012 ◽  
Vol 102 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Dimas Gianuca ◽  
Andros T. Gianuca ◽  
Carolus M. Vooren
Keyword(s):  
South America ◽  
Southwestern Atlantic ◽  
Southern Brazil ◽  
Pink Shrimp ◽  
Breeding Colony ◽  
Patos Lagoon ◽  
Southern Limit ◽  
Total Food ◽  
Patos Lagoon Estuary ◽  
Farfantepenaeus Paulensis

We document the expansion of the breeding distribution of the Little Blue Heron Egretta caerulea (Linnaeus, 1758) to 850 km beyond its previous southern limit in South America. In addition we present data on abundance, breeding biology and food of the species in the Patos Lagoon estuary, the area which the species recently colonized. The maximum abundance recorded in the breeding colony and in a nocturnal roosting site was 53 and 49 individuals respectively. Nesting occurred from September to March. Birds nested in a mixed breeding colony together with about 3,000 breeding pairs of seven other species of Pelecaniformes, in a swampy forest near the margin of the estuary. Five nests were between 1.5 and 4.3 m from the ground, on the shrub Daphnopsis racemosa (Thymelaeaceae), on the trees Sebastiana brasiliensis (Euphorbiaceae) and Mimosa bimucronata (Leguminosae), or on the bamboo Bambusa sp. (Poaceae). Four nests produced two fledglings each, while one nest was abandoned. Of 13 grouped samples of food regurgitated by five nestlings, Pink Shrimp Farfantepenaeus paulensis (Perez-Farfante, 1967) constituted 70% in mass, while total length of ingested fishes and shrimps varied mostly between 20 and 50 mm. Estuarine prey items represented 99% of the total food mass. The recent southward expansion of the breeding range of the Little Blue Heron in South America may be a response to climate warming of the Patos Lagoon estuary. Degradation of estuaries in the southwestern Atlantic may also be forcing the birds to breed in areas outside previous geographical range.

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