Variability of Salinity in Pará River Estuary: 2D Analysis with Flexible Mesh Model

Rosário, Renan Peixoto; Borba, Thais A. C.; Santos, Arthur S.; Rollnic, Marcelo

doi:10.2112/si75-026.1

Cited by 17 publications

(12 citation statements)

References 7 publications

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“…The Amazon estuarine complex and adjacent coastal zones (AE) covered in this study belong to the Northern and Eastern coast of Marajó Island (i.e., Marajó Bay), as well as the Eastern coast of the state of Pará. Marajó Bay is formed mainly by Pará discharges and the Araguaia-Tocantins River Basin can be considered as the main freshwater source to this bay 59 . This area receives a superficial saline intrusion during low river discharge 60 and undergoes a macrotidal regime, with maximum tides around 4 m on both sides of the bay 61 .…”

Section: Methodsmentioning

confidence: 99%

Resource partitioning among stranded aquatic mammals from Amazon and Northeastern coast of Brazil revealed through Carbon and Nitrogen Stable Isotopes

Costa

Botta

Siciliano

et al. 2020

Sci Rep

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Aquatic mammals play an important role in community structure. The present study applied stable isotope analysis (SIA) to evidence trophic relationships and resource partitioning among aquatic mammals inhabiting different environments in the Amazon estuarine complex and adjacent coastal zone (AE) and Northeastern coast (NC) of Brazil. In addition, isotopic niche partitioning among Sotalia guianensis , Inia spp. and Trichechus inunguis within the AE was also evaluated, and ecological S. guianensis stocks were characterized. Among marine delphinids, the carbon isotopic composition in offshore species mirrored that of nearshore species, contradicting the pattern of decreasing δ 13 C values characteristic of many areas around the world including areas in Southeastern and Southern Brazil. Isotopic niches were highly distinct, with no overlap among the assessed species inhabiting the AE. Inia spp. and T. inunguis occupied significantly larger isotopic niche spaces, suggesting high habitat plasticity. S. guianensis inhabited two coastal regions indicating an ecological distinction. Nitrogen values were similar between S. guianensis from the NC and AE, indicating comparable trophic positions. However, NC specimens presented more variable δ 13 C values compared to those from AE. SIA results also allowed for insights concerning habitat use and the trophic ecology of dolphin species inhabiting different oceanographic regions off Northern/Northeast Brazil. These findings provide novel data on the stable isotope composition for cetaceans and sirenians from this region, and aid in furthering knowledge on the trophic ecology and habitat use of the investigated species.

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Section: Methodsmentioning

confidence: 99%

Resource partitioning among stranded aquatic mammals from Amazon and Northeastern coast of Brazil revealed through Carbon and Nitrogen Stable Isotopes

Costa

Botta

Siciliano

et al. 2020

Sci Rep

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“…oligohaline character (salinity between 0 and 5) throughout the entire estuary and the year (ROSA FILHO et al, 2018). Accordingly, in the river Pará's stretch and the study period, surface water salinity ranged from 0.01 to 0.05 (ROSÁRIO et al, 2016;COSTA et al, 2016a;2016b).…”

Section: Composition and Spatio-temporal Variationsmentioning

confidence: 94%

Benthic macroinvertebrates as bioindicators of environmental quality of Pará River estuary, a wetland of Eastern Amazon

Pinto

Tavares

Pinheiro

et al. 2020

Rev. Bras. Ciênc. Ambient. (Online)

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The study characterized and evaluated the use of the benthic macroinvertebrate community as an indicator of impacts in different estuarine environments around the Industrial Port Complex (IPC) of Vila do Conde (Pará State, Amazon region). Fauna of beaches and rivers, in sectors of the estuary under different degrees of environmental impact (high, medium, and low), was compared in different seasonal periods. Macrofauna was composed of typically fresh-water and estuarine groups. Beaches presented sediment with a texture ranging from medium to coarse sand, with a less rich macrofauna ( = 4.5 ± SE 0.3 taxa/sample) and dense ( = 1,838.1 ± 164.8 ind./m2) of organisms when compared to rivers ( = 5.9 ± 0.3 taxa/sample, and 3,248.9 ± 77.0 ind./m2), which were environments more muddy. For both environments, sites in the high-impact sector were less rich ( = 4.7 ± 0.3 taxa/sample) and dense ( = 2,812.9 ± 232.7 ind./m2) when compared to those in the low-impact sector ( = 7.6 ± 0.4 taxa/sample, and 3,314.3 ± 230.1 ind./m2). Richness ( = 6.4 ± 0.3 taxa/sample) and density ( = 3,859.4 ± 190.2 ind./m2) were higher in the rainier season when compared to the less rainy season ( = 4.8 ± 0.3 taxa/sample, and 1,933.0 ± 172.1 ind./m2). However, there were no significant seasonal changes in composition. Results indicated that the structure of the benthic macroinvertebrate community surrounding the IPC responds to the loss of environmental quality, with extreme effects of a drop in abundance and diversity. Taxa that are more tolerant (Namalycastis caetensis, Cirolana sp., Pseudosphaeroma sp., Tubificidae, and Chironomidae) and sensitive (Hydropsychidae and Eteone sp.) to impact conditions were identified and evaluated as potential bioindicators.

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“…Mosqueiro Island is directly influenced by the Pará River estuary processes, which are governed by the seasonal variability of other river basins, such as the Guamá, that bathes the city of Belém (Prestes et al, 2020), and local tides. River discharges and tides control two important processes in the estuary, saline intrusion (Rosário et al, 2016) and suspended sediment transport (Carneiro et al, 2020). The tide is characterized by the macrotidal regime at the mouth of the estuary, with amplitudes of 5 meters (Prestes et al, 2017), in the region that comprises Marajó Bay.…”

Section: Introductionmentioning

confidence: 99%

AMAZONIAN MANATEES (Trichechus inunguis) INHABITING AN EQUATORIAL METROPOLIS: HISTORICAL RECORDS AND MATING ACTIVITY NEAR BELÉM, NORTHERN BRAZIL = SOBRE A PRESENÇA DO PEIXE-BOI AMAZÔNICO (Trichechus inunguis) PRÓXIMO À BELÉM: REGISTROS HISTÓRICOS E ATIVIDADE REPRODUTIVA

Emin-Lima

Costa

Attademo

et al. 2021

Bol. Lab. Hidrobiol.

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The West Indian manatee Trichechus manatus Linnaeus, 1758 and the Amazonian manatee T. inunguis (Natterer, 1883) occur in the Marajó Bay area and in the inlets and channels near Belém. The Amazon Aquatic Mammal Study Group (GEMAM) coordinates a collaborative network for trapped and rescued manatees along the coast of the state of Pará and in the interior of Belém. The presence of the Amazonian manatee is confirmed with the rescue and sightings in the great Belém area. The samples of these manatees are housed in collections of institutions such as MPEG and ICMBio, CMA. On October 31 st 2021, Amazonian manatees were sighted swimming near a beach in the Mosqueiro district, in greater Belém. Residents and tourists took images that show a mating behavior reported in the literature for Trichechus spp. The waters in this area are turbid and these records are a significant opportunity to understand this behavior. The event may suggest that Amazonian manatees are returning to the Belém area and its surroundings, as well as to the east coast of the state of Pará, possibly due to the synergic effects of SARS-CoV-2, providing areas less disturbed by humans, pandemic and the current climate change scenario, which would be a hope for this endangered species.

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Variability of Salinity in Pará River Estuary: 2D Analysis with Flexible Mesh Model

Cited by 17 publications

References 7 publications

Resource partitioning among stranded aquatic mammals from Amazon and Northeastern coast of Brazil revealed through Carbon and Nitrogen Stable Isotopes

Resource partitioning among stranded aquatic mammals from Amazon and Northeastern coast of Brazil revealed through Carbon and Nitrogen Stable Isotopes

Benthic macroinvertebrates as bioindicators of environmental quality of Pará River estuary, a wetland of Eastern Amazon

AMAZONIAN MANATEES (Trichechus inunguis) INHABITING AN EQUATORIAL METROPOLIS: HISTORICAL RECORDS AND MATING ACTIVITY NEAR BELÉM, NORTHERN BRAZIL = SOBRE A PRESENÇA DO PEIXE-BOI AMAZÔNICO (Trichechus inunguis) PRÓXIMO À BELÉM: REGISTROS HISTÓRICOS E ATIVIDADE REPRODUTIVA

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