scholarly journals Variaciones Antropogenicas de las Playas del Sudeste de Buenos Aires, Argentina

2001 ◽  
Vol 28 (1) ◽  
pp. 27 ◽  
Author(s):  
FEDERICO ISLA ◽  
GERMAN BERTOLA ◽  
MARCELO FARENGA ◽  
LUIS CORTIZO
Keyword(s):  
Buenos Aires ◽  
Morphological Changes ◽  
Beach Nourishment ◽  
Fine Sand ◽  
Storm Tracks ◽  
Buenos Aires Province ◽  
Sand Mining ◽  
The South ◽  
Southeastern Coast ◽  
Sand Accumulation

The southeastern coast of Buenos Aires Province is subject to natural and critic erosion problems induced mainly by storm tracks from the south. Man tried to minimize these problems by the construction of groin fields and recently by beach-nourishment programs. Sand exploitation was very intense and was prohibited at the end of the eighties (there are still local exploitations where sand accumulation is induced at the base of the southern jetty of the Mar del Plata harbor). Comparing beach surveys carried out at different periods (1983-84, 1991-93 and 1997-2000), significant changes in beach morphodynamics have been detected. At the northern beaches of La Perla region, the prolongation of old groins have caused convex profiles and accumulation of coarser foreshores. The erosive beach of Playa Grande changed dramatically due to nourishment jobs carried out in 1998. Since that time, the beach face became composed of fine sand and has been receding at a faster rate. At the Alfar beach, the interruption of sand mining provoked the accumulation of fine-sand berms. The Chapadmalal beach recorded the more significant morphological changes within this last period (1997-2000). The beaches within the groin field of Miramar city have steep profiles during winter, recovering the berms during the rest of the year, with variations of the coastline of more than 30 m.

scholarly journals Trophic ecology of Mugil liza at the southern limit of its distribution (Buenos Aires, Argentina)

2015 ◽  
Vol 63 (3) ◽  
pp. 271-277 ◽  
Author(s):  
Gustavo Thompson ◽  
Roberta Callico Fortunato ◽  
Ignacio Chiesa ◽  
Alejandra Volpedo
Keyword(s):  
Trophic Ecology ◽  
Buenos Aires ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Benthic Fauna ◽  
Fine Sand ◽  
Coarse Sand ◽  
Buenos Aires Province ◽  
Southern Limit ◽  
Rates Of Growth

AbstractIn order to get to know the habitat and feeding habits of Mugil liza on the southern coast of Buenos Aires province, 65 specimens obtained at two sampling sites - the San Blas bay (SBB) and the mouth of the Quequén-Salado river (QSR) - during spring (November 2012) and summer (February 2013) were analyzed. Specimens were measured, sexed and weighed, their stomachs were removed and their stomach contents weighed and analyzed under the stereoscopic microscope. The specimens were adults, 28-49 cm in length and weighing 380-1100 g. Population growth was higher in the SBB (TW: 0.003*TL3.36), than in RQS (TW: 0.045*TL2.61). About 98% of the stomachs had some content, their repletion rate being of between 0.4 and 1.2%. About 75% of the stomachs contained very fine sand with few benthic organisms (algae, copepods, foraminifera), whereas the remaining 25% of stomachs contained coarse sand and a greater presence of benthic fauna (amphipods, bivalves, gastropods and coral organisms). The linear relationship between the weight of stomach contents and the total weight and length of the fish showed that the rates of growth (slope) were the same at both sites, but intercept values were significantly higher for San Blas bay (test parallelism; p < 0.001).

Late Quaternary marine-estuarine sequences of the southeastern coast of Buenos Aires Province, Argentina

2020 ◽  
pp. 137-157
Author(s):  
Federico I. Isla ◽  
Jorge L. Fasano ◽  
Laura Perrero ◽  
Marcela A. Espinosa ◽  
Enrique J. Schnack
Keyword(s):  
Buenos Aires ◽  
Late Quaternary ◽  
Buenos Aires Province ◽  
Southeastern Coast

Airborne pollen sampling in a wildlife reserve in the south of Buenos Aires province, Argentina

Aerobiologia ◽  
2007 ◽  
Vol 23 (2) ◽  
pp. 107-117 ◽  
Author(s):  
María Gabriela Murray ◽  
Rosemary L. Scoffield ◽  
Carmen Galán ◽  
Carlos B. Villamil
Keyword(s):  
Buenos Aires ◽  
Airborne Pollen ◽  
Buenos Aires Province ◽  
The South ◽  
Wildlife Reserve

scholarly journals Asociaciones de Diatomeas en Paleoambientes Cuaternarios de la Costa Sur de la Provincia de Buenos Aires, Argentina

2002 ◽  
Vol 29 (1) ◽  
pp. 59 ◽  
Author(s):  
BEATRIZ TÉLLEZ GUTIÉRREZ ◽  
ROBERTO SCHILLIZZI
Keyword(s):  
Water Supply ◽  
Brackish Water ◽  
Buenos Aires ◽  
Climatic Changes ◽  
South Coast ◽  
Buenos Aires Province ◽  
The South ◽  
Lacustrine Deposits ◽  
Geological Surveys ◽  
Three Stages

Sedimentary platforms of the south coast of Buenos Aires province (Argentine) were analised. A palaeoenvironmental evolution is established based on geological surveys, diatoms and sediment analyses. The information may be summarized in three stages: 1) during Pleistocene, ca.16.000 and 12.000 years B.P., lacustrine deposits, with eolic influence were identified; 2) between 8.000 and 6.500 years B.P. movile dunes morphology is associated with moments of climatic changes and increase in water supply to the area, favouring the establishment of shallow bodies colonized by fresh to brackish water assemblages of diatoms with litoral and acuatic macroflora development. There is a continentalization of the lagoons to the end of this stage; 3) ca. 5.300 and 4.800 years B.P., the oriental edge of the platform records marine conditions.

scholarly journals A melissopalynological map of the South and Southwest of the Buenos Aires Province, Argentina

2007 ◽  
Vol 5 (2) ◽  
pp. 172 ◽  
Author(s):  
A. Valle ◽  
A. Andrada ◽  
E. Aramayo ◽  
M. Gil ◽  
S. Lamberto
Keyword(s):  
Buenos Aires ◽  
Buenos Aires Province ◽  
The South

scholarly journals SAND ACCUMULATION IN WAVE-SHELTER ZONE OF OHARAI PORT AND CHANGE IN GRAIN SIZE OF SEABED MATERIALS ON NEARBY COAST

2011 ◽  
Vol 1 (32) ◽  
pp. 63
Author(s):  
Takeo Matsu-ura ◽  
Takaai Uda ◽  
Takayuki Kumada ◽  
Michio Sumiya
Keyword(s):  
Fine Sand ◽  
Beach Erosion ◽  
Annual Rate ◽  
Sand Transport ◽  
The South ◽  
Bathymetric Survey ◽  
Deposition Zone ◽  
The Pacific ◽  
Sand Accumulation ◽  
The Pacific Ocean

Beach changes around Oharai Port facing the Pacific Ocean were investigated using bathymetric survey data collected over 25 years between 1979 and 2004. Between the south and offshore breakwaters of Oharai Port, 1.50×106 m3 of fine sand was deposited in this period, i.e., at an annual rate of 6.0×104 m3/yr, which was originally supplied from the Naka River 3 km north of the port. Also in the wave-shelter zone of the offshore breakwater south of the port, 7.0×106 m3 of fine sand was deposited between 1979 and 2004 at an annual rate of 2.8×105 m3/yr, which was transported by the northward longshore sand transport induced from outside to inside the wave-shelter zone of the offshore breakwater, resulting in severe beach erosion on the south coast outside the wave-shelter zone. Taking into consideration the fact that sand transport to the Kashimanada coast is now completely obstructed by the port breakwaters, sand bypassing and sand back passing to the coast from the sand deposition zone of Oharai Port are required.

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