scholarly journals The South American Advances in Submarine Canyons Studies and Their Link to the Ocean Decade

2021 ◽  
Vol 8 ◽  
Author(s):  
Marcos V. B. Silva ◽  
Tereza C. M. Araújo
Keyword(s):  
Sustainable Development ◽  
South America ◽  
Submarine Canyon ◽  
Spatiotemporal Analysis ◽  
South American ◽  
Submarine Canyons ◽  
Blue Economy ◽  
Relevant Role ◽  
Marine Areas ◽  
Oceanographic Conditions

Submarine canyons have a relevant role in marine ecosystems. They are responsible for oceanographic conditions such as variability of temperature and salinity, sediment transport, nutrients, and even pollutants amongst marine areas. Submarine canyon studies have been growing and reaching prominence due to their importance in the Blue Economy. Initiatives to promote sustainable development for the ocean have been discussed in the Ocean Decade. Although canyons studies are increasing, how can we integrate these with the Ocean Decade outcomes? Thus, we aim to demonstrate an overview of the advances of submarine canyons studies and their link to the Ocean Decade for South America. We analyzed 160 studies divided into spatiotemporal analysis and study approaches according to the Ocean Decade outcomes. We discuss these articles, building a timeline and argumentative topics considering the advances, and discuss gaps to predict the future of submarine canyons studies in the Ocean Decade and Blue Economy context.

scholarly journals Cross-Boundary Energy-Resources Assessment for an Integrated Sources Harnessing and Sustainable Development

2018 ◽  
Vol 1 (1) ◽  
pp. 18
Author(s):  
Vinícius Oliveira da Silva ◽  
Miguel Edgar Morales Udaeta ◽  
André Luiz Veiga Gimenes ◽  
Jose Aquiles Baesso Grimoni
Keyword(s):  
Sustainable Development ◽  
South America ◽  
Transmission Lines ◽  
Boundary Energy ◽  
Energy Resources ◽  
South American ◽  
Energy Integration ◽  
The South ◽  
The Sustainable Development ◽  
Four Dimensions

<p class="Abstract"><em>T</em><em>he objective of this study is to evaluate the energy resources (ER) and the regulatory framework of the South American countries aiming at the sustainable development and to develop the South America Energy Integration (SAEI) in the long term focusing on structures such as transmission lines and pipelines. The methodology is based on the IERP (Integrated Energy-Resources Planning) and </em><em>the analysis of the EI existing in South America. As result,</em><em> </em><em>the regulatory assessment provided evidence that the current structure is already in place with binational hydroelectric plants and transnational pipelines that promote energy integration. On the other hand, SAIE still needs an institutional evolution that gives more integration and quicker solutions to international arbitration. Finally, the construction of the attributes and sub-attributes and their respective valuations aiming at a SAEI strategy is not trivial, there is a need for the complete assessment of all the attributes and sub-attributes of the four dimensions established in the IERP methodology of the expansion of the SSERs analyzed to provide a strategy for the SAEI.</em><em></em></p>

scholarly journals Pleistocene Mammals from Pampean Region (Argentina). Biostratigraphic, Biogeographic, and Environmental Implications

Quaternary ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 15
Author(s):  
José Luis Prado ◽  
María Teresa Alberdi ◽  
Jonathan Bellinzoni
Keyword(s):  
South America ◽  
The State ◽  
Historical Study ◽  
South American ◽  
Environmental Implications ◽  
Sedimentary Sequences ◽  
Pampean Region ◽  
Mammalian Faunas ◽  
Pleistocene Mammals ◽  
Fossil Records

The Pampean Region contains sedimentary sequences with abundant mammal fossil records, which constitute the chronological outline of the Plio–Pleistocene of South America. These classic localities have been used for more than a century to correlate with other South American regions. Throughout this time, a series of misinterpretations have appeared. To understand the stratigraphic significance of these localities and the geochronological situation of each unit referring to the Pleistocene, a critical historical study of the antecedents was carried out, evaluating the state of each unit. The biostratigraphic studies of the Pampean Region’s mammalian faunas improved the understanding of biogeographic changes taking into account the environmental fluctuations of the Pleistocene.

scholarly journals An Overview of Equine Influenza in South America

Viruses ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 888
Author(s):  
Cecilia Olguin-Perglione ◽  
María Edith Barrandeguy
Keyword(s):  
South America ◽  
Disease Surveillance ◽  
Economic Losses ◽  
South American ◽  
Respiratory Pathogens ◽  
Equine Influenza Virus ◽  
Equine Influenza ◽  
Vaccine Manufacturer ◽  
Gene Level ◽  
Control Procedures

Equine influenza virus (EIV) is one of the most important respiratory pathogens of horses as outbreaks of the disease lead to significant economic losses worldwide. In this review, we summarize the information available on equine influenza (EI) in South America. In the region, the major events of EI occurred almost in the same period in the different countries, and the EIV isolated showed high genetic identity at the hemagglutinin gene level. It is highly likely that the continuous movement of horses, some of them subclinically infected, among South American countries, facilitated the spread of the virus. Although EI vaccination is mandatory for mobile or congregates equine populations in the region, EI outbreaks continuously threaten the equine industry. Vaccine breakdown could be related to the fact that many of the commercial vaccines available in the region contain out-of-date EIV strains, and some of them even lack reliable information about immunogenicity and efficacy. This review highlights the importance of disease surveillance and reinforces the need to harmonize quarantine and biosecurity protocols, and encourage vaccine manufacturer companies to carry out quality control procedures and update the EIV strains in their products.

scholarly journals Comparison of <i>H</i> component geomagnetic field time series obtained at different sites over South America

2018 ◽  
Vol 36 (3) ◽  
pp. 937-943 ◽  
Author(s):  
Maurício J. A. Bolzan ◽  
Clezio M. Denardini ◽  
Alexandre Tardelli
Keyword(s):  
South America ◽  
Geomagnetic Field ◽  
Phase Coherence ◽  
South American ◽  
Data Set ◽  
Geomagnetism And Paleomagnetism ◽  
Strong Phase ◽  
Geomagnetic Fields ◽  
Time Variations ◽  
Physical Phenomena

Abstract. The geomagnetic field in the Brazilian sector is influenced by the South American Magnetic Anomaly (SAMA) that causes a decrease in the magnitude of the local geomagnetic field when compared to other regions in the world. Thus, the magnetometer network and data set of space weather over Brazil led by Embrace are important tools for promoting the understanding of geomagnetic fields over Brazil. In this sense, in this work we used the H component of geomagnetic fields obtained at different sites in South America in order to compare results from the phase coherence obtained from wavelet transform (WT). Results from comparison between Cachoeira Paulista (CXP) and Eusébio (EUS), and Cachoeira Paulista and São Luis (SLZ), indicated that there exist some phenomena that occur simultaneously in both locations, putting them in the same phase coherence. However, there are other phenomena putting both locations in a strong phase difference as observed between CXP and Rio Grande, Argentina (RGA). This study was done for a specific moderate geomagnetic storm that occurred in March 2003. The results are explained in terms of nonlinear interaction between physical phenomena acting in distinct geographic locations and at different times and scales. Keywords. Geomagnetism and paleomagnetism (time variations – diurnal to secular)

Reflections on Contemporary South American Democracies

2001 ◽  
Vol 33 (3) ◽  
pp. 599-609 ◽  
Author(s):  
GUILLERMO O'DONNELL
Keyword(s):  
Latin America ◽  
South America ◽  
National Level ◽  
South American ◽  
Science Literature ◽  
Political Rights ◽  
Opinion Expression ◽  
Definition Of ◽  
The Third World ◽  
Indefinite Future

The occasion of honouring the memory of John Brooks, a great friend of Latin America, has helped me vanquish my initial reluctance to tackle a topic that is as broad, varied and still open-ended as the present situation of democracy in South America. As a first measure of my limitations, with the exception of some references to Costa Rica and Mexico, I will not discuss Central America and the Caribbean, not because I feel these regions are unimportant but because, simply, I do not know enough about them. However, when I feel that I am on sufficiently solid ground so as to refer to Latin America as a whole, I will do so.I begin by noting that in contemporary South America some countries satisfy the definition of political democracy. Those countries share two main characteristics. One is that they hold elections under universal adult franchise that, at least at the national level, are reasonably fair and competitive. These are standard criteria in the political science literature. However, having in mind the experience of Latin America and elsewhere in the third world, I believe that we should add that such elections must be institutionalised. By this I mean that all relevant actors expect that elections of this kind will continue being held in the indefinite future so, whether they like or not, it is rational for them to play democracy, not coup-making or insurrection. We should also stipulate that these elections are decisive, in the sense that those who are elected do occupy the respective offices and end their terms in the constitutionally prescribed way; they are not, as it has happened too often in Latin America, prevented from occupying office or thrown out of it because some supra-constitutional power feels that they are the ‘wrong people’.The second characteristic is the enjoyment of certain political rights, especially of opinion, expression, association, movement and access to a reasonably free and pluralist media. Of course, these and other rights are important per se; in addition, they are instrumental – necessary conditions – for the effectuation of the kind of elections I have just specified.

Salicornia cuscoensis (Amaranthaceae/Chenopodiaceae), a new species from Peru (South America)

Phytotaxa ◽  
2017 ◽  
Vol 319 (3) ◽  
pp. 254 ◽  
Author(s):  
M. ÁNGELES ALONSO ◽  
MANUEL B. CRESPO ◽  
HELMUT FREITAG
Keyword(s):  
New Species ◽  
South America ◽  
Morphological Characters ◽  
Tierra Del Fuego ◽  
South American ◽  
Habitat Distribution ◽  
Closely Related Species ◽  
Molecular Analyses ◽  
Southern Patagonia ◽  
A New Species

The name Salicornia cuscoensis given to a plant from high Andean saltmarshes near Cusco [Cuzco] and Ayacucho, Peru (South America) is validated by a diagnosis and description. The main morphological characters that separate S. cuscoensis from other closely related species are creeping habit, delicate branches, inflorescence of short and thin spikes, and seed indumentum. The new species clearly differs from other perennial Salicornia taxa growing in high Andean saltmarshes such as S. pulvinata and S. andina. The former forms small compact cushions producing very short, few-flowered inflorescences. The latter shows woody stems and forms larger rounded carpets. Morphologically, S. cuscoensis is also similar to S. magellanica, a species growing along the seashore in southern Patagonia and Tierra del Fuego, but the latter has shorter and wider inflorescences and larger seeds with a different type and arrangement of indumentum. Molecular analyses also supported the separation of S. cuscoensis. Data on habitat, distribution and phylogenetic relationships are presented for the new species and its relatives, and an identification key is given for the South American taxa of the genus Salicornia.

scholarly journals Impact of enriched analyses on regional numerical forecasts over southeastern South America during SALLJEX

2014 ◽  
Vol 29 (3) ◽  
pp. 315-330
Author(s):  
Yanina García Skabar ◽  
Matilde Nicolini
Keyword(s):  
Data Assimilation ◽  
South America ◽  
Atmospheric Modeling ◽  
South American ◽  
The South ◽  
Low Level ◽  
Positive Effects ◽  
Accumulated Rainfall ◽  
Low Level Jet ◽  
The Impact

During the warm season 2002-2003, the South American Low-Level Jet Experiment (SALLJEX) was carried out in southeastern South America. Taking advantage of the unique database collected in the region, a set of analyses is generated for the SALLJEX period assimilating all available data. The spatial and temporal resolution of this new set of analyses is higher than that of analyses available up to present for southeastern South America. The aim of this paper is to determine the impact of assimilating data into initial fields on mesoscale forecasts in the region, using the Brazilian Regional Atmospheric Modeling System (BRAMS) with particular emphasis on the South American Low-Level Jet (SALLJ) structure and on rainfall forecasts. For most variables, using analyses with data assimilated as initial fields has positive effects on short term forecast. Such effect is greater in wind variables, but not significant in forecasts longer than 24 hours. In particular, data assimilation does not improve forecasts of 24-hour accumulated rainfall, but it has slight positive effects on accumulated rainfall between 6 and 12 forecast hours. As the main focus is on the representation of the SALLJ, the effect of data assimilation in its forecast was explored. Results show that SALLJ is fairly predictable however assimilating additional observation data has small impact on the forecast of SALLJ timing and intensity. The strength of the SALLJ is underestimated independently of data assimilation. However, Root mean square error (RMSE) and BIAS values reveal the positive effect of data assimilation up to 18-hours forecasts with a greater impact near higher topography.

scholarly journals Late Pleistocene echimyid rodents (Rodentia, Hystricognathi) from northern Brazil

2016 ◽  
Vol 88 (2) ◽  
pp. 829-845 ◽  
Author(s):  
THAIS M.F. FERREIRA ◽  
ADRIANA ITATI OLIVARES ◽  
LEONARDO KERBER ◽  
RODRIGO P. DUTRA ◽  
LEONARDO S. AVILLA
Keyword(s):  
South America ◽  
Tropical Forests ◽  
Late Pleistocene ◽  
Fossil Record ◽  
South American ◽  
Squamate Reptiles ◽  
Northern Brazil ◽  
Northern South America ◽  
First Time

ABSTRACT Echimyidae (spiny rats, tree rats and the coypu) is the most diverse family of extant South American hystricognath rodents (caviomorphs). Today, they live in tropical forests (Amazonian, coastal and Andean forests), occasionally in more open xeric habitats in the Cerrado and Caatinga of northern South America, and open areas across the southern portion of the continent (Myocastor). The Quaternary fossil record of this family remains poorly studied. Here, we describe the fossil echimyids found in karst deposits from southern Tocantins, northern Brazil. The analyzed specimens are assigned to Thrichomys sp., Makalata cf. didelphoides and Proechimys sp. This is the first time that a fossil of Makalata is reported. The Pleistocene record of echimyids from this area is represented by fragmentary remains, which hinders their determination at specific levels. The data reported here contributes to the understanding of the ancient diversity of rodents of this region, evidenced until now in other groups, such as the artiodactyls, cingulates, carnivores, marsupials, and squamate reptiles.

Driftwood on Heard Island

Polar Record ◽  
1989 ◽  
Vol 25 (154) ◽  
pp. 223-228 ◽  
Author(s):  
J. M. B. Smith ◽  
P. Rudall ◽  
P. L. Keage
Keyword(s):  
South America ◽  
South American ◽  
Long Distance Dispersal ◽  
South American Species ◽  
Long Distance ◽  
Heard Island

AbstractSamples from 73 pieces of non-structural driftwood on Heard Island (53°06′S, 73°30′E) were identified to genus or species. Thirty-one belonged to South American species of Nothofagus. The remainder, consisting mostly of conifers especially Picea and Larix, probably came from ships' cargoes. The assemblage is similar to those reported, from smaller samples, on other southern islands. Other items of flotsam, including fishing buoys and drift-cards, are also reported from Heard Island. The significance of driftwood transport from South America to the island in accounting for long-distance dispersal of terrestrial and intertidal organisms is discussed.

scholarly journals Salmonellain meat imported from South American countries

1967 ◽  
Vol 65 (3) ◽  
pp. 321-325 ◽  
Author(s):  
M. van Schothorst ◽  
E. H. Kampelmacher
Keyword(s):  
South America ◽  
Large Degree ◽  
South American

Salmonellas were isolated from 278 of 800 (34·7 %) samples of frozen carcass or boneless horsemeat from South America and from 101 of 751 (13·5%) samples of frozen boneless beef. However, the percentage of contamination detected depends to a large degree on the method of examination. Contamination was mostly external, a fact which points to slaughterhouse contamination. Boneless meat was contaminated to a higher degree than carcass meat.

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