Macrofaunal patterns and animal–sediment relationships in Uruguayan estuaries and coastal lagoons (Atlantic coast of South America)

The genus Orthopristis includes seven valid species, three from the western Atlantic and five from eastern Pacific, while the available identification guides and taxonomic keys incorrectly recognize Orthopristis ruber as the only valid species found on the Atlantic coast of South America. Efforts to expand the inventory of fish species from the northern coast of Brazil led to the identification of two distinct species of Orthopristis from Atlantic South America, based on the analysis of coloration patterns and meristic data, as well as DNA. In the present study, the limits of Orthopristis ruber are reviewed, while Orthopristis scapularis is recognized as a valid species for the northern and northeastern coasts of South America. Based on intermediate morphological characteristics and nuclear DNA markers, a hybrid zone was identified off the state of Espírito Santo, on the eastern Brazilian coast. Additionally, considerations are made on the diversity and biogeography of the coastal marine and estuarine fishes found on the Brazilian coast.

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Invasion of the Indo-Pacific blenny Omobranchus punctatus (Perciformes: Blenniidae) on the Atlantic Coast of Central and South America

Neotropical Ichthyology ◽

10.1590/s1679-62252011000300010 ◽

2011 ◽

Vol 9 (3) ◽

pp. 571-578 ◽

Cited By ~ 11

Author(s):

Oscar Lasso-Alcalá ◽

Jorge L. S. Nunes ◽

Carlos Lasso ◽

Juan Posada ◽

Ross Robertson ◽

...

Keyword(s):

South America ◽

Introduced Species ◽

Temporal Pattern ◽

Larval Dispersal ◽

New Records ◽

Atlantic Coast ◽

Museum Collections ◽

Ship Traffic ◽

Marine Habitats ◽

Petroleum Platforms

We examined 308 specimens of the Indo-Pacific blenniid Omobranchus punctatus deposited in four museum collections, and analyzed data on their collection locations to assess its invasion on the Atlantic coast of Central and South America. This species occurs in shoreline estuarine and marine habitats in the Indo-West Pacific. Previous sampling and recent records in the Tropical West Atlantic from 1930 to 2004 produced 20 records for: Panamá, Colombia, Venezuela, Trinidad and Brazil. In this work, we provide data on 17 new records for the Gulfs of Venezuela and Paria in Venezuela, as well as four records for Maranhão and Pará states in NE Brazil. The temporal pattern of collections (1930 - 2009) and the proximity of most localities to ports and zones of ship traffic indicate that O. punctatus was initially introduced to the Atlantic by ships travelling from India to Trinidad. Within Brazil the introduction is linked to shipping connected to petroleum platforms. In Maranhão and Pará the introduction may have occurred as a result of fish sheltering in fouling on hulls of ships moving between ports around the mouth of the Amazon River. Alternatively, the spread of this species along of the American coast may reflect the expansion of the range of O. puntactus through larval dispersal in northward flowing currents. We recommend monitoring of this introduced species, and studies of its ecology in West Atlantic areas.

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Paleoenvironmental Reconstructions Improve Ecosystem Services Risk Assessment: Case Studies from Two Coastal Lagoons in South America

Water ◽

10.3390/w10101350 ◽

2018 ◽

Vol 10 (10) ◽

pp. 1350 ◽

Cited By ~ 4

Author(s):

Maria Velez ◽

Daniel Conde ◽

Juan Lozoya ◽

James Rusak ◽

Felipe García-Rodríguez ◽

...

Keyword(s):

Risk Assessment ◽

Risk Management ◽

Ecosystem Services ◽

South America ◽

Coastal Lagoons ◽

Holistic Approach ◽

Assessment Process ◽

History Of ◽

Paleoenvironmental Reconstructions

Paleoenvironmental reconstructions are increasingly being used in conservation biology, ecosystem management, and evaluations of ecosystem services (ES), but their potential to contribute to the ES risk assessment process has not been explored. We propose that the long-term history of the ecosystem provides valuable information that augments and strengthens an ES risk assessment and that it should be considered routinely when undertaking risk assessments. We adjusted a standard ecosystem-based risk management (EBRM) protocol to include paleoenvironmental data, and tested the modified approach on two coastal lagoons in South America. Paleolimnological reconstructions in both lagoons indicate that salinity and nutrients (in Laguna de Rocha), and salinity (in Ciénaga Grande de Santa Marta), as controlled by hydrologic connectivity with the ocean and freshwater tributaries, have been the key variables behind ecosystem’s function. This understanding, applied to inform various components and steps in the EBRM protocol, suggests that the maintenance of hydrological connections should be a management priority to minimize risk to ES. This work illustrates the utility of including paleoenvironmental data in an EBRM context and highlights the need for a more holistic approach to risk management by incorporating the long-term history of ecosystem function.

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The Genomic Prehistory of the Indigenous People of Uruguay

10.1101/2021.11.11.468260 ◽

2021 ◽

Author(s):

John Lindo ◽

Andre Luiz Campelo dos Santos ◽

Michael DeGiorgio ◽

Gonzalo Figueiro

Keyword(s):

South America ◽

Indigenous People ◽

Ethnic Diversity ◽

Atlantic Coast ◽

Archaeological Site ◽

Migration Route ◽

European Contact ◽

The People ◽

History Of ◽

Military Campaigns

The prehistory of the people of Uruguay is greatly complicated by the dramatic and severe effects of European contact, as with most of the Americas. After the series of military campaigns that exterminated the last remnants of nomadic peoples, Uruguayan official history masked and diluted the former indigenous ethnic diversity into the narrative of a singular people that all but died out. Here we present the first whole genome sequences of the Indigenous people of the region before the arrival of Europeans, from an archaeological site in eastern Uruguay that dates from 2,000 years before present. We find a surprising connection to ancient individuals from Panama and eastern Brazil, but not to modern Amazonians. This result may be indicative of a distinct migration route into South America that may have occurred along the Atlantic coast. We also find a distinct ancestry previously undetected in South America. Though this work begins to piece together some of the demographic nuance of the region, the sequencing of ancient individuals from across Uruguay is needed to better understand the ancient prehistory and genetic diversity that existed before European contact, thereby helping to rebuild the history of the indigenous population of what is now Uruguay.

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Early Pleistocene lineages of Bagre bagre (Linnaeus, 1766) (Siluriformes: Ariidae), from the Atlantic coast of South America, with insights into the demography and biogeography of the species

Neotropical Ichthyology ◽

10.1590/1982-0224-20150184 ◽

2016 ◽

Vol 14 (2) ◽

Cited By ~ 9

Author(s):

Wemerson C. da Silva ◽

Alexandre P. Marceniuk ◽

João Braullio L. Sales ◽

Juliana Araripe

Keyword(s):

South America ◽

Atlantic Coast ◽

Early Pleistocene ◽

Eastern Coast ◽

Distribution Area ◽

Northern Coast ◽

Marine Environments ◽

Larval Stages ◽

Physical Barriers ◽

Northeast Coast

ABSTRACT Coastal and marine environments are characterized by a lack of evident physical barriers or geographic isolation, and it may be difficult to understand how divergence can arise and be sustained in marine environments. The identification of 'soft' barriers is a crucial step towards the understanding of gene flow in marine environments. The marine catfishes of the family Ariidae are a demersal group with restricted migratory behavior, no pelagic larval stages, and mechanisms of larval retention, representing a potentially useful model for the understanding of historical processes of allopatric speciation in the marine environment. In the present study, two lineages of the Coco sea catfish, Bagre bagre , were recognized from their complete segregation at both mitochondrial and morphological levels. One lineage is distributed between Venezuela and the northern coast of Brazil, including the semiarid northeast coast, while the second lineage is found on the eastern coast of Brazil, including the humid northeast coast. Based on distribution area, habitats preference, and genetic variability, inferences are made in relation to biogeography and demography of lineages in Atlantic coast of South America.

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Investigation of Directional Spreading of Waves in Relatively Shallow Water

Volume 1: Offshore Technology; Special Symposium on Ocean Measurements and Their Influence on Design ◽

10.1115/omae2007-29589 ◽

2007 ◽

Author(s):

Vale´ria S. Rego

Keyword(s):

South America ◽

Shallow Water ◽

Atlantic Coast ◽

Spreading Factor ◽

Wave Kinematics ◽

Wave Data ◽

Practical Design ◽

Particle Velocities

The directional spreading of waves is investigated for relatively shallow water (20m depth) wave data, collected with acoustic current profilers, along the Atlantic Coast of South America. Values for the wave kinematics or wave spreading factor, recommended by API and ISO for reduction of in-line particle velocities and accelerations under waves due to directional spreading, are calculated in order to allow judgement of approximate values that can be used in shallow water regions for practical design applications.

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