Copepod community structure after a mining dam disaster in the Southwestern Atlantic Ocean

2021 ◽  
pp. 107325
Author(s):  
Laura Rodrigues da Conceição ◽  
Lilian Elisa Demoner ◽  
Juliano Bicalho Pereira ◽  
Fernanda Perassoli ◽  
Renato David Ghisolfi ◽  
...  
Keyword(s):  
Community Structure ◽  
Atlantic Ocean ◽  
Southwestern Atlantic ◽  
Copepod Community ◽  
Southwestern Atlantic Ocean ◽  
Mining Dam

scholarly journals Impact on the copepod community structure in a coastal region after a mining dam disaster in the Southwestern Atlantic Ocean

2018 ◽  
Author(s):  
Luiz F L Fernandes ◽  
Juliano B Pereira
Keyword(s):  
Atlantic Ocean ◽  
Coastal Region ◽  
River Mouth ◽  
Zooplankton Community ◽  
Negative Consequences ◽  
Southwestern Atlantic ◽  
Southwestern Atlantic Ocean ◽  
Mining Dam ◽  
Mining Residues ◽  
Doce River

Zooplankton plays an important role in marine ecosystems by controlling the phytoplankton population, regenerating nutrients and exporting biogenic matter. Their distribution is limited by the environmental characteristics of the pelagic realm, and potential changes in the environment may promote several levels of responses. Zooplankton was sampled in the Southwestern Atlantic Ocean in a coastal region near the Doce River after the worst mining dam disaster ever recorded in Brazilian waters. Samples were collected using a WP2 plankton net fitted with a 200-micron mesh and a mechanical flowmeter, and preserved in a 4% buffered formaldehyde. Results showed an increase in abundance right after the disaster with more than 222.959 ind.m-3 at the river mouth, a two-hundred-fold increase over the past year, with two copepod species, Parvocalanus scotti and Oithona nana, making up to 80% of this total abundance. A decrease in species richness and diversity was also observed in the sampling area along the year as well as a shift in species composition. A significant impact on the zooplankton community was observed due to the mining residues that reached the coastal area of the Doce River in the Southwestern Atlantic Ocean, with negative consequences for the entire local food web.

scholarly journals Impact on the copepod community structure in a coastal region after a mining dam disaster in the Southwestern Atlantic Ocean

2018 ◽  
Author(s):  
Luiz F L Fernandes ◽  
Juliano B Pereira
Keyword(s):  
Atlantic Ocean ◽  
Coastal Region ◽  
River Mouth ◽  
Zooplankton Community ◽  
Negative Consequences ◽  
Southwestern Atlantic ◽  
Southwestern Atlantic Ocean ◽  
Mining Dam ◽  
Mining Residues ◽  
Doce River

Zooplankton plays an important role in marine ecosystems by controlling the phytoplankton population, regenerating nutrients and exporting biogenic matter. Their distribution is limited by the environmental characteristics of the pelagic realm, and potential changes in the environment may promote several levels of responses. Zooplankton was sampled in the Southwestern Atlantic Ocean in a coastal region near the Doce River after the worst mining dam disaster ever recorded in Brazilian waters. Samples were collected using a WP2 plankton net fitted with a 200-micron mesh and a mechanical flowmeter, and preserved in a 4% buffered formaldehyde. Results showed an increase in abundance right after the disaster with more than 222.959 ind.m-3 at the river mouth, a two-hundred-fold increase over the past year, with two copepod species, Parvocalanus scotti and Oithona nana, making up to 80% of this total abundance. A decrease in species richness and diversity was also observed in the sampling area along the year as well as a shift in species composition. A significant impact on the zooplankton community was observed due to the mining residues that reached the coastal area of the Doce River in the Southwestern Atlantic Ocean, with negative consequences for the entire local food web.

Population structure and ontogenetic habitat use of Micropogonias furnieri in the Southwestern Atlantic Ocean inferred by otolith chemistry

2021 ◽  
Vol 240 ◽  
pp. 105953
Author(s):  
Esteban Avigliano ◽  
Nadia M. Alves ◽  
M. Rita Rico ◽  
Claudio O. Ruarte ◽  
Luciana D’Atri ◽  
...  
Keyword(s):  
Population Structure ◽  
Atlantic Ocean ◽  
Habitat Use ◽  
Otolith Chemistry ◽  
Southwestern Atlantic ◽  
Southwestern Atlantic Ocean ◽  
Micropogonias Furnieri

scholarly journals Abundance and demography of bottlenose dolphins inhabiting a subtropical estuary in the Southwestern Atlantic Ocean

2015 ◽  
Vol 96 (2) ◽  
pp. 332-343 ◽  
Author(s):  
Pedro F. Fruet ◽  
Fábio G. Daura-Jorge ◽  
Luciana M. Möller ◽  
Rodrigo Cezar Genoves ◽  
Eduardo R. Secchi
Keyword(s):  
Atlantic Ocean ◽  
Bottlenose Dolphins ◽  
Southwestern Atlantic ◽  
Southwestern Atlantic Ocean ◽  
Subtropical Estuary

Taxonomy of the genus Thyonella (Holothuroidea: Dendrochirotida), with mention of the first record of T. sabanillaensis from the southwestern Atlantic Ocean

Zootaxa ◽  
2018 ◽  
Vol 4527 (1) ◽  
pp. 75
Author(s):  
LUCIANA MARTINS
Keyword(s):  
Pacific Ocean ◽  
Atlantic Ocean ◽  
First Record ◽  
Morphological Characters ◽  
Sem Analysis ◽  
Southwestern Atlantic ◽  
Internal Morphology ◽  
The Pacific ◽  
Southwestern Atlantic Ocean ◽  
The Pacific Ocean

The genus Thyonella currently comprises four species which occur in the Atlantic and Pacific Oceans. Thyonella mexicana is the only species known to occur in the Pacific Ocean. The main morphological characters used to distinguish Thyonella species are their dermal ossicles. Since the differences among these characters are subtle, this contribution provides a detailed description and comparison of the ossicle assemblage of the concerned taxa. In addition, description of the internal morphology of three of the concerned species is also provided. Further, this study reports on the first record of Thyonella sabanillaensis for the Southwestern Atlantic. A worldwide revision of the distributional records of Thyonella species is presented and their taxonomy is discussed, concluding that some traditional taxonomic characters should be used cautiously. A brief discussion about the importance of SEM analysis is also provided. 

Tissue distribution of heavy metals in small cetaceans from the Southwestern Atlantic Ocean

1990 ◽  
Vol 21 (6) ◽  
pp. 299-304 ◽  
Author(s):  
Jorge E. Marcovecchio ◽  
Víctor J. Moreno ◽  
Ricardo O. Bastida ◽  
Marcela S. Gerpe ◽  
Diego H. Rodríguez
Keyword(s):  
Heavy Metals ◽  
Atlantic Ocean ◽  
Tissue Distribution ◽  
Southwestern Atlantic ◽  
Southwestern Atlantic Ocean
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