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Journal articles on the topic 'Pampean'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 June 2025

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1

García, R. D., M. L. Messetta, C. Feijoó, and P. E. García. "Assessment of variations in dissolved organic matter in contrasting streams in the Pampas and Patagonian regions (Argentina)." Marine and Freshwater Research 70, no. 5 (2019): 698. http://dx.doi.org/10.1071/mf18156.

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Dissolved organic matter (DOM) is the major source of carbon in aquatic environments and may be derived from allochthonous or autochthonous sources. This study presents the first DOM characterisation in streams from two contrasting Argentinean regions (the Pampas and Patagonia). We found that dissolved organic carbon (DOC) concentrations and absorption coefficients at 254 and 350nm (a254 and a350) were higher in Pampean than in Patagonian streams. DOM from streams in both regions contained compounds with high molecular weight and highly variable a350 per DOC; it has been suggested that this could be an indicator of lignin content. The characterisation of DOM reflects the agricultural signal and the effect of autochthonous sources in Pampean streams, whereas a more pristine condition with high input from terrestrial environments was recorded in Patagonian streams. No sign of DOM photodegradation was observed in either region. Fluorescence-based indices suggest a more recent input of DOM in Pampean streams, whereas a highly humified component was recorded in Patagonian streams. The combined use of absorbance and fluorescence-based techniques was useful for understanding the quantity and quality of DOM in these contrasting regions in Argentina.

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2

Dahlquist, Juan A., Sebastián O. Verdecchia, Edgardo G. Baldo, et al. "Early Cambrian U-Pb zircon age and Hf-isotope data from the Guasayán pluton, Sierras Pampeanas, Argentina: implications for the northwestern boundary of the Pampean arc." Andean Geology 43, no. 1 (2016): 137. http://dx.doi.org/10.5027/andgeov43n1-a08.

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An Early Cambrian pluton, known as the Guasayán pluton, has been identified in the central area of Sierra de Guasayán, northwestern Argentina. A U-Pb zircon Concordia age of 533±4 Ma was obtained by LA-MC-ICP-MS and represents the first report of robustly dated Early Cambrian magmatism for the northwestern Sierras Pampeanas. The pluton was emplaced in low-grade metasedimentary rocks and its magmatic assemblage consists of K-feldspar (phenocrysts)+plagioclase+quartz+biotite, with zircon, apatite, ilmenite, magnetite and monazite as accessory minerals. Geochemically, the granitic rock is a metaluminous subalkaline felsic granodiorite with SiO2=69.24%, Na2O+K2O=7.08%, CaO=2.45%, Na2O/ K2O=0.71 and FeO/MgO=3.58%. Rare earth element patterns show moderate slope (LaN/YbN=8.05) with a slightly negative Eu anomalies (Eu/Eu*=0.76). We report the first in situ Hf isotopes data (εHft=-0.12 to -4.76) from crystallized zircons in the Early Cambrian granites of the Sierras Pampeanas, helping to constrain the magma source and enabling comparison with other Pampean granites. The Guasayán pluton might provide a link between Early Cambrian magmatism of the central Sierras Pampeanas and that of the Eastern Cordillera, contributing to define the western boundary of the Pampean paleo-arc.

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3

Zandomeni, Priscila S., Juan A. Moreno, Sebastián O. Verdecchia, et al. "Crystallization Conditions and Petrogenetic Characterization of Metaluminous to Peraluminous Calc-Alkaline Orogenic Granitoids from Mineralogical Systematics: The Case of the Cambrian Magmatism from the Sierra de Guasayán (Argentina)." Minerals 11, no. 2 (2021): 166. http://dx.doi.org/10.3390/min11020166.

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The Sierra de Guasayán (Eastern Sierras Pampeanas, Argentina) is formed by low to medium grade metamorphic rocks intruded by Cambrian metaluminous (La Soledad quartz-diorite), slightly peraluminous (Guasayán, El Escondido and El Martirizado granodiorite plutons), and strongly peraluminous (Alto Bello granodiorite) granitoids of the Pampean magmatic arc. Chemical compositions of amphibole, plagioclase, biotite, and titanite indicate that these granitoids were emplaced at low pressure (mostly <3 kbar) and temperature (<770 °C) under oxidizing conditions (QFM + 1 and QFM + 2), which are similar to the emplacement conditions reported for other granites of the Pampean magmatic arc. Mineral assemblages and whole-rock and mineral chemistry of the granitoids from the Sierra de Guasayán indicate an I-type affinity for the La Soledad quartz-diorite (amphibole, biotite, and titanite), S-type affinity for the Alto Bello granodiorite (biotite, muscovite, cordierite, and sillimanite), and a hybrid nature for the main Guasayán and El Escondido plutons (biotite, monazite, and magnetite). This hybrid nature is supported by the presence of abundant mafic microgranular enclaves and rapakivi texture and by published zircon Hf-isotope data (εHfi ranging from −4.76 to −0.12). This suggests, in turn, the involvement of hybridization in the genesis of these granitoids, which seems to be a common mechanism operating in the Pampean magmatic arc.

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Dileo, Estefanía Soledad. "The recent performance of the agricultural sector of the pampas: their potential and prospects. analysis of economic explanations." Visión de Futuro, no. 23, No 1 (Enero - Junio) (January 1, 2019): 60–74. http://dx.doi.org/10.36995/j.visiondefuturo.2019.23.01.005.en.

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The insertion of Argentina as an exporter of primary products and manufactures of agricultural origin explains the importance of agricultural production in the process of national accumulation. In consequence of this, economic science, from different conceptions, has focused on the study of this sector to know its potential to boost the growth and development of the Argentine economy. As a result of this, when approaching the specialized literature, there is a multiplicity of economic approaches that explain and analyze the Pampas agricultural sector from different perspectives. From our point of view, the dissent that is verified in the literature on this sector, is related to the way in which economic science addresses the phenomena that constitute its object of study. The aim of the present work consists in making a documentary analysis of the different explanations about the recent performance of the Pampean agricultural sector -specifically, the soy boom-, structuring it in such a way to expose the way in which they approach what they intend to explain. The result of the analysis not only manages to highlight the correspondence between the ways of knowing about agrarian explanations and the epistemological postulates of economic science, but also that which underpins the lack of consensus among specialists to explain the Pampean agrarian sector.

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5

Fernández, Fernando J., Fabricio Idoeta, César García-Esponda, et al. "Small mammals (Didelphimorphia, Rodentia and Chiroptera) from Pampean Region, Argentina." Check List 8, no. 1 (2012): 130. http://dx.doi.org/10.15560/8.1.130.

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We studied small mammal assemblages recovered from owl pellets collected at 11 locations throughout the Argentina’s Pampean Region. We identified 21 species, including two marsupials, one bat, and 18 rodents. From the analysis of this dataset, we could distinguish three main groups of small mammals that currently inhabit the Pampean Region: 1) a group of taxa related to Pampean agroecosystems (Calomys spp., Akodon azarae, and Oligoryzomys flavescens); 2) a group of Brazilian species (Cavia aperea, Oxymycterus rufus, Necromys lasiurus, Necromys obscurus, Holochilus brasiliensis, and Monodelphis dimidiata); and 3) a group including species from Patagonia, Espinal and Monte phytogeographic provinces (Microcavia australis, Oligoryzomys longicaudatus, Eligmodontia typus, Graomys griseoflavus, and Akodon molinae). In addition, we documented the first record of a species of the large-bodied group of Calomys in Buenos Aires province, expanding its distribution ca. 420 km southward.

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6

Fernández, Fernando J., Fabricio Idoeta, César García-Esponda, et al. "Small mammals (Didelphimorphia, Rodentia and Chiroptera) from Pampean Region, Argentina." Check List 8, no. 1 (2012): 130. https://doi.org/10.5281/zenodo.13465683.

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(Uploaded by Plazi for the Bat Literature Project) We studied small mammal assemblages recovered from owl pellets collected at 11 locations throughout the Argentina's Pampean Region. We identified 21 species, including two marsupials, one bat, and 18 rodents. From the analysis of this dataset, we could distinguish three main groups of small mammals that currently inhabit the Pampean Region: 1) a group of taxa related to Pampean agroecosystems (Calomys spp., Akodon azarae, and Oligoryzomys flavescens); 2) a group of Brazilian species (Cavia aperea, Oxymycterus rufus, Necromys lasiurus, Necromys obscurus, Holochilus brasiliensis, and Monodelphis dimidiata); and 3) a group including species from Patagonia, Espinal and Monte phytogeographic provinces (Microcavia australis, Oligoryzomys longicaudatus, Eligmodontia typus, Graomys griseoflavus, and Akodon molinae). In addition, we documented the first record of a species of the large-bodied group of Calomys in Buenos Aires province, expanding its distribution ca. 420 km southward.

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7

Fernández, Fernando J., Fabricio Idoeta, César García-Esponda, et al. "Small mammals (Didelphimorphia, Rodentia and Chiroptera) from Pampean Region, Argentina." Check List 8, no. 1 (2012): 130. https://doi.org/10.5281/zenodo.13465683.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) We studied small mammal assemblages recovered from owl pellets collected at 11 locations throughout the Argentina's Pampean Region. We identified 21 species, including two marsupials, one bat, and 18 rodents. From the analysis of this dataset, we could distinguish three main groups of small mammals that currently inhabit the Pampean Region: 1) a group of taxa related to Pampean agroecosystems (Calomys spp., Akodon azarae, and Oligoryzomys flavescens); 2) a group of Brazilian species (Cavia aperea, Oxymycterus rufus, Necromys lasiurus, Necromys obscurus, Holochilus brasiliensis, and Monodelphis dimidiata); and 3) a group including species from Patagonia, Espinal and Monte phytogeographic provinces (Microcavia australis, Oligoryzomys longicaudatus, Eligmodontia typus, Graomys griseoflavus, and Akodon molinae). In addition, we documented the first record of a species of the large-bodied group of Calomys in Buenos Aires province, expanding its distribution ca. 420 km southward.

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8

Fernández, Fernando, Fabricio Idoeta, César García-Esponda, et al. "Small mammals (Didelphimorphia, Rodentia and Chiroptera) from Pampean Region, Argentina." Check List 8, no. (1) (2012): 130–34. https://doi.org/10.15560/8.1.130.

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Abstract:

We studied small mammal assemblages recovered from owl pellets collected at 11 locations throughout the Argentina's Pampean Region. We identified 21 species, including two marsupials, one bat, and 18 rodents. From the analysis of this dataset, we could distinguish three main groups of small mammals that currently inhabit the Pampean Region: 1) a group of taxa related to Pampean agroecosystems (<em>Calomys </em>spp., <em>Akodon azarae</em>, and <em>Oligoryzomys flavescens</em>); 2) a group of Brazilian species (<em>Cavia aperea</em>, <em>Oxymycterus rufus</em>, <em>Necromys lasiurus</em>, <em>Necromys obscurus</em>, <em>Holochilus brasiliensis</em>, and <em>Monodelphis dimidiata</em>); and 3) a group including species from Patagonia, Espinal and Monte phytogeographic provinces (<em>Microcavia australis</em>, <em>Oligoryzomys longicaudatus</em>, <em>Eligmodontia typus</em>, <em>Graomys griseoflavus</em>, and <em>Akodon molinae</em>). In addition, we documented the first record of a species of the large-bodied group of <em>Calomys </em>in Buenos Aires province, expanding its distribution <em>ca. </em>420 km southward.

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9

Torre, Gabriela, Diego M. Gaiero, Nicolás Juan Cosentino, Renata Coppo, and André Oliveira-Sawakuchi. "New insights on sources contributing dust to the loess record of the western edge of the Pampean Plain during the transition from the late MIS 2 to the early Holocene." Holocene 30, no. 4 (2019): 537–45. http://dx.doi.org/10.1177/0959683619875187.

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High-resolution studies of palaeorecords located closer to the dust source areas of South America are relevant for increasing the knowledge on past climatic conditions in the Southern Hemisphere. In this sense, the Pampean loess archives can offer explicit records of dust source, transport, and deposition in the region, providing new insights which may be used to better understand the role of dust in future climate change scenarios. In this work, we studied a loess sequence located at the westernmost Pampean Plain. The studied sequence covers a span of time from the late Marine Isotope Stage (MIS 2) period up to the early Holocene. Loess samples from this record have two grain-size populations, indicating more than one dust source area. The dominance of a coarse-silt subpopulation during the transition from the late MIS 2 to the early Holocene suggests that proximal dust sources were dominant at that time. Two of the most proximal dust sources were analyzed as probable contributors to the Lozada site: sediments derived from the Eastern Pampean Ranges and sediments derived from the shorelines of the Mar Chiquita Lake. The geochemical data suggest that neither area was a significant dust source to the eastern Pampean Plain during the studied interval. Instead, our geochemical data suggest a dominant supply from a southern and relatively closer area, linked to the foothills of the Andes, and the increased activation during the early Holocene of a more distant source to the north in the Puna region, which contributed finer loess.

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10

Balboni, Leandro, Dario César Colautti, and Claudio Rafael Mariano Baigún. "Biology of growth of Hoplias aff. malabaricus (Bloch, 1794) in a shallow pampean lake (Argentina)." Neotropical Ichthyology 9, no. 2 (2011): 437–44. http://dx.doi.org/10.1590/s1679-62252011000200022.

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The trahira Hoplias aff. malabaricus is a top predator in pampean shallow lakes and is highly appreciated by recreational anglers and artisanal fishermen. Trahira growth from Yalca shallow lake was determined by lepidological analysis and age validated by marginal increment. When growth was fitted to the von Bertalanffy model, annual classes exhibited a bimodal pattern as a result of the presence of spring and summer annual cohorts associated with a three month spawning season, each period in turn showing different growth patterns. The trahira population-age structure at Yalca shallow lake showed a truncated profile with very low numbers of large adults and few individuals older than three to four years, thus producing an unbalanced length-structure population. Growth parameters and growth performance were similar to the corresponding parameters estimated for other shallow pampean lakes of the region, but strongly diverged from the data for those populations inhabiting subtropical and tropical environments. Such differences could be accounted for by dissimilarity in metabolic rates associated with thermal differences accompanying seasonal variability among latitudes as well as by the development of adaptive physiologic and demographic responses to cope with the high thermal amplitude and hydrologic instability observed in pampean lakes.

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11

Albino, Adriana M. "The Cenozoic lizard record of the Pampean Region." Geodiversitas 42, no. 12 (2020): 175–83. https://doi.org/10.5252/geodiversitas2020v42a12.

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12

ARANA, MARCELO D., MARÍA LUJÁN LUNA, PEDRO C. BERRUETA, MARÍA LUZ MARTINENCO, and GABRIELA E. GIUDICE. "Rumohra ponceana (Polypodiales: Dryopteridaceae): a new species from Pampean biogeographic province in Argentina." Phytotaxa 521, no. 1 (2021): 27–38. http://dx.doi.org/10.11646/phytotaxa.521.1.3.

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The fern Rumohra ponceana sp. nov., a narrow endemic of the Austral Pampean district, Pampean biogeographic province in Argentina, is described and illustrated. The species inhabits the Tandilia and Ventania Systems, where it grows in sunny rock crevices. The new species differs from the widespread R. adiantiformis (sensu lato) by the reduced size of all parts of the sporophyte and conspicuous capitate glandular hairs at the margins of petiole and rhizome scales. Also, there are significant differences in the architecture of the laminae, the colour and size of the spores and the ornamentation of the perispore, which is folded in R. ponceana and projects in irregular tubercles throughout its surface.

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13

Prado, José Luis, María Teresa Alberdi, and Jonathan Bellinzoni. "Pleistocene Mammals from Pampean Region (Argentina). Biostratigraphic, Biogeographic, and Environmental Implications." Quaternary 4, no. 2 (2021): 15. http://dx.doi.org/10.3390/quat4020015.

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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.

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14

Carmona, F., M. Holzman, R. Rivas, M. F. Degano, E. Kruse, and M. Bayala. "Evaluación de dos modelos para la estimación de la evapotranspiración de referencia con datos CERES." Revista de Teledetección, no. 51 (June 29, 2018): 87. http://dx.doi.org/10.4995/raet.2018.9259.

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<p>Evapotranspiration is the most important variable in the Pampas plain. Information provided by sensors onboard satellite missions allows represent the spatial and temporal variability of evapotranspiration, which cannot be achieved using only measurements of weather stations. In this work, the Priestley and Taylor (PT) and FAO Penman Monteith (FAO PM) equations were adapted to estimate the reference evapotranspiration, ET<sub>0</sub> , using only CERES satellite products (SYN1 and CldTypHist). In order to evaluate the reference evapotranspiration from CERES, a comparison with in situ measurements was conducted. We used ET data provided by the Oficina de Riesgo Agropecuario, corresponding to 24 stations placed in the Pampean Region of Argentina (2001-2016). Results showed very good agreement between the estimates with CERES products and in situ values, with errors between ±0.8 and ±1.1 mm d–<sup>1 </sup>and r<sup>2</sup> greater than 0.75 at daily scale, and errors between ±14 and ±19 mm month<sup>–1</sup> and r<sup>2</sup> greater than 0.9, at monthly scale better results were obtained with adapted model FAO PM than PT. Finally, ET<sub>0</sub> monthly maps for the Pampean Region of Argentina were elaborated, which allowed knowing the temporal-spatial variation in the validation area. In conclusion, the methods presented here are a suitable alternative to estimate the reference evapotranspiration without requiring ground measurements.</p>

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15

D´Eramo, F. J., J. J. Esteban, M. Demartis, E. Aragón, J. E. Coniglio, and L. P. Pinotti. "Time lag between metamorphism and crystallization of anatectic granites (Córdoba, Argentina)." Geologica Acta 18 (November 2, 2020): 1–14. http://dx.doi.org/10.1344/geologicaacta2020.18.17.

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SHRIMP and LA-ICP-MS analyses carried out on zircons from the Río de los Sauces granite revealed their metamorphic and igneous nature. The metamorphic zircons yielded an age of 537±4.8 (2σ)Ma that probably predates the onset of the anatexis during the Pampean orogeny. By contrast, the igneous zircons yielded a younger age of 529±6 (2σ)Ma and reflected its crystallization age. These data point to a short time lag of ca. 8Myr between the High Temperature (HT) metamorphic peak and the subsequent crystallization age of the granite. Concordia age of 534±3.8 (2σ)Ma, for both types of zircon populations, can be considered as the mean age of the Pampean HT metamorphism in the Sierras de Córdoba.

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16

de Domitrovic, Yolanda Zalocar, Melina Devercelli, and Marina E. Forastier. "Phytoplankton of the Chaco-Pampean Plain." Advances in Limnology 65 (July 7, 2014): 81–98. http://dx.doi.org/10.1127/1612-166x/2014/0065-0035.

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17

Casco, María A., and María E. Mac Donagh. "Reservoirs of the Peri-Pampean region." Advances in Limnology 65 (July 7, 2014): 215–31. http://dx.doi.org/10.1127/1612-166x/2014/0065-0043.

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18

Bonatto, Florencia, Daniela Gomez, Andrea Steinmann, and José Priotto. "Mating strategies of Pampean mouse males." Animal Biology 62, no. 4 (2012): 381–96. http://dx.doi.org/10.1163/157075612x634102.

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Patterns of space use and sexual dimorphism are frequently used to infer mating systems. We examined body size and home range size and intra- and intersexual overlap degree in order to elucidate mating strategy of Akodon azarae males. We studied spacing patterns using 113 and 129 home ranges established by males and females, respectively, in four 0.25 ha enclosures during the breeding season. Significant differences between sexes in home range size and overlap degree were found. Male home ranges were always larger than those of females. We observed exclusive space use among males and among females. Considering only those males that shared their home ranges with females, average intersexual overlap value was about 50%. Males mainly overlap their home ranges with home ranges of two or three females. Significant differences in body size were found between males and females, with males being larger. We concluded that space use and sexual dimorphism in this species is consistent with patterns characteristic of polygynous rodents, and we propose a polygynous system in A. azarae.

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19

Dangavs, Nauris V., and Adriana M. Blasi. "Quaternary ontogeny of a pampean ?laguna?" Journal of Paleolimnology 10, no. 1 (1994): 59–66. http://dx.doi.org/10.1007/bf00683147.

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20

Pilati, Alberto, Santiago Andrés Echaniz, Alicia María Vignatti, and Graciela Inés Bazán. "Dynamics of an autumn phytoplankton bloom in a hypereutrophic urban lake in the semiarid Pampean region (Argentina)." Anales de Biología, no. 42 (March 26, 2020): 21–30. http://dx.doi.org/10.6018/analesbio.42.03.

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Dinámica de un florecimiento algal otoñal en un lago hipereutrófico urbano de la región pampeana semiárida (Argentina). En este trabajo, se reporta un raro florecimiento fitoplanctónico otoñal en un lago somero de la región semiárida pampeana (Argentina). La biomasa fitoplanctónica presentó un solo pico otoñal, seguido dos meses más tarde por un pico en la clorofila. El pico de biomasa coincidió con un débil pastoreo sobre la comunidad fitoplanctónica (dominada por la poco pastoreada Planktothrix agardhii (Gomont) Anagnostidis et Komárek) junto con una reducción de la limitación por N en el otoño. El pico de clorofila ocurrió cuando las algas aumentaron su contenido de clorofila probablemente debido a la reducción de la radiación solar y la baja transparencia del agua. Esto indicará que la estacionalidad del fitoplancton en esta área particular depende de múltiples factores bióticos y abióticos. In this paper we report a rare autumm phytoplankton bloom in a shallow lake of the semiarid Pampean area of Argentina. Phytoplankton biomass peaked only once during the autumn, followed 2 months later by a chlorophyll peak. The biomass peak might have been the result of a weak grazing pressure on the phytoplankton community (dominated by the nongrazeable Planktothrix agardhii (Gomont) Anagnostidis et Komárek) coupled with a reduction in the N-limitation towards the autumm. The chlorophyll peak took place when phytoplankton cells increased their chlorophyll content probably due to a reduction of solar irradiance and low water transparency. This findings indicate that phytoplankton seasonality in this particular area may depend on multiple biotic and abiotic factors.

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Glok-Galli, Melisa, Viviana Colasurdo, Daniel E. Martínez, Fabián Grosman, Orlando M. Quiroz Londoño, and Pablo Sanzano. "Hydrochemical and isotopic tools to evaluate the groundwater role in the hydrological functioning of a Pampean lake, Buenos Aires province, Argentina." BOLETÍN GEOLÓGICO Y MINERO 134, no. 4 (2023): 45–67. http://dx.doi.org/10.21701/bolgeomin/134.4/003.

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Waters from the fractured-karstic and detritic (Pampeano) aquifers, and from surface water bodies are closely interacting in the Tapalqué Creek Upper Basin (CSAT for its acronym in Spanish), southeast of the Chaco-Pampean plain, Argentina. The La Barrancosa lake, endorheic and of socio-economic and cultural relevance, is located in this basin headwater. Within the framework of an integrated vision of these water resources, the main objective of this work is to know this lake’s water origin, as well as to identify and explain the processes involved in its interaction with the Pampeano aquifer. Hydrochemical and isotopic (δ2H and δ18O) tools were jointly used, with special emphasis on the ionic ratios study and the hydrochemical modelling. The rainwater evaporation during infiltration into aquifers and the dissolution/weathering of the geological materials rich in Ca2+, Mg2+ and K+ present in the study area, are the main processes that determine the composition of waters in the recharge zones. The dissolution of Na+-rich minerals and the cationic exchange are of relevance toward the plain zone. This last process and the concentration by evaporation control the composition of the La Barrancosa lake waters (effluent). These conclusions are validated by the δ2H, δ18O and d values characteristic of the CSAT waters and can be extrapolated to other basins developed in similar environments.

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22

Torra, Roberto. "Geochemistry and genesis of the Pampean and Post-Pampean Formations (Late Pleistocene-Holocene), central and northern Argentina Pampas and its adjacent region—An approaching case study." Chinese Journal of Geochemistry 23, no. 3 (2004): 220–37. http://dx.doi.org/10.1007/bf02842070.

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23

Pérez-Carrera, Alejo, and Alicia Fernández-Cirelli. "Arsenic concentration in water and bovine milk in Cordoba, Argentina. Preliminary results." Journal of Dairy Research 72, no. 1 (2005): 122–24. http://dx.doi.org/10.1017/s0022029904000640.

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The Chaco Pampean Plain of central Argentina constitutes one of the largest regions of high arsenic (As) groundwaters known, covering around 1×106 km2 (Smedley & Kinniburg, 2002; Farías et al. 2004).

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24

Kravetz, Sebastián, Beatriz González, Agostina Marano, and Adonis Giorgi. "The genus Tetracladium in Pampean streams (Buenos Aires, Argentina)." Phytotaxa 338, no. 3 (2018): 276–84. https://doi.org/10.11646/phytotaxa.338.3.5.

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Kravetz, Sebastián, González, Beatriz, Marano, Agostina, Giorgi, Adonis (2018): The genus Tetracladium in Pampean streams (Buenos Aires, Argentina). Phytotaxa 338 (3): 276-284, DOI: 10.11646/phytotaxa.338.3.5, URL: http://dx.doi.org/10.11646/phytotaxa.338.3.5

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25

Rascovan, Nicolás, Belén Carbonetto, Santiago Revale, et al. "The PAMPA datasets: a metagenomic survey of microbial communities in Argentinean pampean soils." Microbiome 1, no. 1 (2013): 21. http://dx.doi.org/10.1186/2049-2618-1-21.

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Draghi, Regina, Fabiana B. Drago, Pablo E. Saibene, and M. Gabriela Agostini. "Helminth communities from amphibians inhabiting agroecosystems in the Pampean Region (Argentina)." Revue suisse de Zoologie 127, no. 2 (2020): 261–74. https://doi.org/10.35929/RSZ.0020.

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Draghi, Regina, Drago, Fabiana B., Saibene, Pablo E., Agostini, M. Gabriela (2020): Helminth communities from amphibians inhabiting agroecosystems in the Pampean Region (Argentina). Revue suisse de Zoologie 127 (2): 261-274, DOI: 10.35929/RSZ.0020

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Aliaga, Vanina S., María C. Piccolo, and Gerardo M. E. Perillo. "Surface water extent dynamics from three periods of continuous Landsat time series; subregional differences across Argentine plains." Revista de Teledetección, no. 58 (July 21, 2021): 131. http://dx.doi.org/10.4995/raet.2021.14263.

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<p>The Pampean region in Argentina is an extensive plain characterized by abundant shallow lakes that fulfill many environmental, ecological, and social functions. This study aims to detect the multiannual lake area changes in this region during 2001-2009 using remote sensing, including lakes as small as ≥10,000 m<sup>2</sup> or 1 ha. Landsat scenes of the wet (2008-2009), normal (2006), and dry (2008-2009) seasons were obtained, and using remote sensing techniques, the number and area of shallow lakes were calculated. The spatiotemporal variation of shallow lakes was studied in different climate periods in eight singular subregions. Spatial associations between annual precipitation and lake number and area were analyzed through the development of a Geographic Information System (GIS) at a subregional scale. During the study period the total lake area in the Pampean region decreased by 5257.39 km<sup>2 </sup>(62 %), but each subregion showed different responses to climatic events. In seven of them, the differences between climate periods prove to be statistically significant (P&gt;0.01). The relationship between precipitation and lake number and area revealed the domain of positive association. We conclude that climate factors play a dominant role in lake changes across the Pampean plains. However, other factors such as origin, topographic and edaphic characteristics intensify or mitigate changes in surface hydrology.</p>

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Brandoni, Diego, Esteban Soibelzon, and Alejo Scarano. "On Megatherium gallardoi (Mammalia, Xenarthra, Megatheriidae) and the Megatheriinae from the Ensenadan (lower to middle Pleistocene) of the Pampean region, Argentina." Geodiversitas 30, no. 4 (2008): 793–804. https://doi.org/10.5281/zenodo.4651208.

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Brandoni, Diego, Soibelzon, Esteban, Scarano, Alejo (2008): On Megatherium gallardoi (Mammalia, Xenarthra, Megatheriidae) and the Megatheriinae from the Ensenadan (lower to middle Pleistocene) of the Pampean region, Argentina. Geodiversitas 30 (4): 793-804, DOI: 10.5281/zenodo.4651208

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Brambilla, L., and DA Ibarra. "A new species of Eutatus Gervais (Xenarthra, Dasypodidae) from the Late Pleistocene of the Northern Pampean Region, Argentina." Palaeontologia Electronica 20, no. 1 (2017): 1–9. https://doi.org/10.26879/676.

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Brambilla, L, Ibarra, DA (2017): A new species of Eutatus Gervais (Xenarthra, Dasypodidae) from the Late Pleistocene of the Northern Pampean Region, Argentina. Palaeontologia Electronica 20 (1): 1-9, DOI: 10.26879/676, URL: http://dx.doi.org/10.26879/676

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Goin, Francisco J., Natalia Zimicz, Martín De Los Reyes, and Leopoldo Soibelzon. "A new large didelphid of the genus Thylophorops (Mammalia: Didelphimorphia: Didelphidae), from the late Tertiary of the Pampean Region (Argentina)." Zootaxa 2005 (December 31, 2009): 35–46. https://doi.org/10.5281/zenodo.185652.

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Goin, Francisco J., Zimicz, Natalia, Reyes, Martín De Los, Soibelzon, Leopoldo (2009): A new large didelphid of the genus Thylophorops (Mammalia: Didelphimorphia: Didelphidae), from the late Tertiary of the Pampean Region (Argentina). Zootaxa 2005: 35-46, DOI: 10.5281/zenodo.185652

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Zurita, Alfredo Eduardo, Alfredo Armando Carlini, and Gustavo Juan Scillato-Yane. "A new species of Neosclerocalyptus Paula Couto, 1957 (Xenarthra, Glyptodontidae, Hoplophorinae) from the middle Pleistocene of the Pampean region, Argentina." Geodiversitas 30, no. 4 (2008): 779–91. https://doi.org/10.5281/zenodo.4651202.

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Zurita, Alfredo Eduardo, Carlini, Alfredo Armando, Scillato-Yane, Gustavo Juan (2008): A new species of Neosclerocalyptus Paula Couto, 1957 (Xenarthra, Glyptodontidae, Hoplophorinae) from the middle Pleistocene of the Pampean region, Argentina. Geodiversitas 30 (4): 779-791, DOI: 10.5281/zenodo.4651202

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Kerber, Leonardo. "Caviomorph rodents from the Pampean region (Argentina) in the historical Santiago Roth Collection in Switzerland." Swiss Journal of Palaeontology 142, no. 1 (2023): 1–14. https://doi.org/10.1186/s13358-023-00272-8.

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Kerber, Leonardo (2023): Caviomorph rodents from the Pampean region (Argentina) in the historical Santiago Roth Collection in Switzerland. Swiss Journal of Palaeontology (8) 142 (1): 1-14, DOI: 10.1186/s13358-023-00272-8, URL: https://doi.org/10.1186/s13358-023-00272-8

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TORRETTA, Juan P., María C. LÓPEZ, and Hugo J. MARRERO. "Flower flies (Diptera: Syrphidae) in Pampean agroecosystems: a study case." Revista de la Sociedad Entomológica Argentina 80, no. 2 (2021): 23–34. http://dx.doi.org/10.25085/rsea.800205.

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Agroecosystems produce profound alterations on the structure and functioning of the original environment, mainly due to the reduction of biodiversity. Flower flies (Diptera: Syrphidae) are potentially useful organisms for the diverse ecosystem services they provide. We studied syrphids collected in a Pampean agroecosystem to assess richness, abundance, host plants, and the ecosystem services they could offer. Flower flies were represented by three subfamilies, eight tribes, 17 genera, and 26 species/morphospecies. Adults of these flies visited flowers of 44 species of wild and/or cultivated plants and exhibited a generalist interaction pattern. Larvae of the most abundant species were predators (mainly soft-bodied Hemiptera) and/or decomposers/aquatic filters. Only one species was pollinivorous. Our results, together with the scarce published bibliography, suggest that the syrphid communities of the highly modified Pampean region are composed of a few very abundant species and many rare or low representative species.

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Kunzler Moreira Dornelles, Jonas. "Dyonélio Machado: Pampean literature beyond its borders." Romanica Olomucensia 33, no. 2 (2021): 225–40. http://dx.doi.org/10.5507/ro.2021.016.

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Feijoó, Claudia, Laura Rigacci, and Santiago Doyle. "Ecological regionalization of pampean streams in Argentina." SIL Proceedings, 1922-2010 29, no. 2 (2005): 748–53. http://dx.doi.org/10.1080/03680770.2005.11902778.

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Bidegain, J. C., M. E. Evans, and A. J. Van Velzen. "A magnetoclimatological investigation of Pampean loess, Argentina." Geophysical Journal International 160, no. 1 (2004): 55–62. http://dx.doi.org/10.1111/j.1365-246x.2004.02431.x.

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Prado, José Luis, and María Teresa Alberdi. "Quaternary mammalian faunas of the Pampean Region." Quaternary International 212, no. 2 (2010): 176–86. http://dx.doi.org/10.1016/j.quaint.2009.03.010.

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Camilión, María Cecilia. "Clay mineral composition of pampean loess (Argentina)." Quaternary International 17 (January 1993): 27–31. http://dx.doi.org/10.1016/1040-6182(93)90077-s.

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Flegenheimer, Nora, and Marcelo Zárate. "The archaeological record in pampean loess deposits." Quaternary International 17 (January 1993): 95–100. http://dx.doi.org/10.1016/1040-6182(93)90085-t.

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40

Pasini, Eduardo, José Maurício Bonifacino, and Fábio Piccin Torchelsen. "Trichocline maxima (Compositae, Mutisieae) a rare Pampean daisy rediscovered after 70 years in Uruguay." Iheringia, Série Botânica 76 (May 7, 2021): 1–6. https://doi.org/10.21826/2446-82312021v76e2021006.

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Pasini, Eduardo, Bonifacino, José Maurício, Torchelsen, Fábio Piccin (2021): Trichocline maxima (Compositae, Mutisieae) a rare Pampean daisy rediscovered after 70 years in Uruguay. Iheringia, Série Botânica (e2021006) 76: 1-6, DOI: 10.21826/2446-82312021v76e2021006, URL: https://www.mendeley.com/catalogue/c0909dd8-229f-3ad1-9dbc-030240f5a74c/

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García, Fernando, Andrés Grasso, María González Sanjuan, Adrián Correndo, and Fernando Salvagiotti. "Connecting Crop Nutrient Use Efficiency to Future Soil Productivity." Better Crops with Plant Food 102, no. 4 (2018): 8–10. http://dx.doi.org/10.24047/bc10248.

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Trends over the past 25 years indicate that Argentina’s growth in its grain crop productivity has largely been supported by the depletion of the extensive fertility of its Pampean soils. Long-term research provides insight into sustainable nutrient management strategies ready for wide-scale adoption.

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Arana, Marcelo D., María Luján Luna, Pedro C. Berrueta, María Luz Martinenco, and Gabriela E. Giudice. "Rumohra ponceana (Polypodiales: Dryopteridaceae): a new species from Pampean biogeographic province in Argentina." Phytotaxa 521, no. 1 (2021): 27–38. https://doi.org/10.11646/phytotaxa.521.1.3.

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Arana, Marcelo D., Luna, María Luján, Berrueta, Pedro C., Martinenco, María Luz, Giudice, Gabriela E. (2021): Rumohra ponceana (Polypodiales: Dryopteridaceae): a new species from Pampean biogeographic province in Argentina. Phytotaxa 521 (1): 27-38, DOI: 10.11646/phytotaxa.521.1.3, URL: http://dx.doi.org/10.11646/phytotaxa.521.1.3

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Verger, Kévin Le. "Xenarthrans of the collection of Santiago Roth from the Pampean Region of Argentina (Pleistocene), in Zurich, Switzerland." Swiss Journal of Palaeontology 142, no. 1 (2023): 1–39. https://doi.org/10.1186/s13358-023-00265-7.

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Verger, Kévin Le (2023): Xenarthrans of the collection of Santiago Roth from the Pampean Region of Argentina (Pleistocene), in Zurich, Switzerland. Swiss Journal of Palaeontology (3) 142 (1): 1-39, DOI: 10.1186/s13358-023-00265-7, URL: https://doi.org/10.1186/s13358-023-00265-7

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Rusconi, J. M., N. B. Camino, and M. F. Achinelly. "Nematodes (Mermithidae) parasitizing grasshoppers (Orthoptera: Acrididae) in the Pampean region, Argentina." Brazilian Journal of Biology 77, no. 1 (2017): 12–15. http://dx.doi.org/10.1590/1519-6984.06015.

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Abstract This work provides the results of a survey of entomonematodes parasites of grasshoppers in grasslands of the Pampean Region, Argentina. Nymphs of Staurorhectus longicornis Giglio-Tos, Laplatacris dispar Rhen, 1939, Dichroplus elongatus Giglio-Tos, 1894 and Metaleptea brevicornis (L.) (Orthoptera: Acrididae) were collected. Mermithidae was the only family registered with seven species: Agamermis decaudata Cobb, Steiner and Christie, 1923, Amphimermis bonaerensis Miralles and Camino, 1983, Amphimermis dichroplusi Camino and Lange, 1997, Amphimermis ronderosi Camino and Lange, 1997, Hexamermis coclhearius Stock and Camino, 1992, Hexamermis ovistriata Stock and Camino, 1992, and Longimermis acridophila Camino and Stock, 1989. The values of parasitism ranged between 1-12%, and intensity not overcome the number of 5.0 nematodes per larva. The nematodes observed showed specificity, not registering the same species of parasite in more than one host species. The Pampean region constituted an area with high diversity of mermithids where new species could be consider as bioregulator agents of this troublesome insect pests in agricultural areas of Argentina.

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BOGAN, Sergio, Federico AGNOLIN, and Juan Marcos MIRANDE. "Fossil record of a Characiform in the Monte Hermoso Formation (lower Pliocene), Buenos Aires, Argentina. Palaeobiogeographical implications." Comptes Rendus Palevol 20, no. 4 (2021): 49–55. https://doi.org/10.5852/cr-palevol2021v20a4.

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The fossil record of fishes from the Farola de Monte Hermoso locality (lower Pliocene) in the southern Buenos Aires province, Argentina, shows an unusual composition. The locality at the southern boundary of the Brazilian Ichthyogeographic Realm. However, its fossil record is composed of fossil fishes that are not necessarily related to Brazilian lineages, namely indeterminate siluriforms, trichomycterid catfishes, and percomorphaceans. The aim of the present contribution is to describe and report for the first time isolated specimens belonging to Characidae fishes. In the Pampean region the fossil record of characids is restricted to <em>Oligosarcus </em>Günther, 1864 sp. from the late-middle Pleistocene. The present finding fills a temporal gap between the Paleogene and Quaternary reports and indicates that Brazilian fish lineages were present in the area by early Pliocene times, and may constitute an indirect evidence of the evolution of the basins in the southern Pampean Area.

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Martínez, Gustavo, and María A. Gutiérrez. "Early Holocene water well in the Pampas of Argentina: Human responses to water shortage events." Holocene 29, no. 1 (2018): 145–57. http://dx.doi.org/10.1177/0959683618804643.

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Water wells are ethnographically and archaeologically described in Australia and the plains of North America. Recently, a prehistoric water well from the early Holocene was recorded in the Pampas of Argentina. The aim of this paper is to present the main characteristics of the water well, considering its form, dimension, sediment analyses (texture and chemical parameters), and material culture content. This is the first water well recorded in the Pampas of Argentina. Consequently, a discussion about natural or cultural origins of this kind of features is provided. An evaluation of similarities and differences with well-described water wells from the United States and Australia is included in order to highlight the cultural origin of the pit. Also, the meaning of the cultural response to water availability in terms of early-Holocene hunter–gatherer adaptations as well as the implications of this strategy for understanding paleoenvironmental scenarios of the Pampas of Argentina are discussed. The well seems to have mitigated an exceptional lack of surface water in the eastern Pampas or offered an alternative for the non-drinkable quality of the available surface water. The strategy of digging water wells was available in the behavioral repertoire of the Pampean hunter–gatherer populations as early as c. 8700–8000 14C yr BP ( c. 9700–8800 cal. yr BP), as these groups were fairly flexible and resilient in dealing with short-term shortages of water.

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Ruiz-Ramoni, Damián, Jorge D. Carrillo-Briceno, Damian Voglino, and Francisco Juan Prevosti. "Carnivoran fossils from the Pampean region (Argentina): Santiago Roth collections in Switzerland." Swiss Journal of Palaeontology 142, no. 1 (2023): 1–15. https://doi.org/10.1186/s13358-023-00274-6.

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Ruiz-Ramoni, Damián, Carrillo-Briceno, Jorge D., Voglino, Damian, Prevosti, Francisco Juan (2023): Carnivoran fossils from the Pampean region (Argentina): Santiago Roth collections in Switzerland. Swiss Journal of Palaeontology (11) 142 (1): 1-15, DOI: 10.1186/s13358-023-00274-6, URL: https://doi.org/10.1186/s13358-023-00274-6

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Balboni, Leandro, Dario César Colautti, and Claudio Rafael Mariano Baigún. "Biology of growth of Hoplias aff. malabaricus (Bloch, 1794) in a shallow pampean lake (Argentina)." Neotropical Ichthyology 9, no. 2 (2011): 437–44. https://doi.org/10.1590/S1679-62252011000200022.

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Balboni, Leandro, Colautti, Dario César, Baigún, Claudio Rafael Mariano (2011): Biology of growth of Hoplias aff. malabaricus (Bloch, 1794) in a shallow pampean lake (Argentina). Neotropical Ichthyology 9 (2): 437-444, DOI: 10.1590/S1679-62252011000200022, URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200022&lng=en&tlng=en

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49

Carrillo, Juan D., and Hans P. PÜschel. "Pleistocene South American native ungulates (Notoungulata and Litopterna) of the historical Roth collections in Switzerland, from the Pampean Region of Argentina." Swiss Journal of Palaeontology 142, no. 1 (2023): 1–25. https://doi.org/10.1186/s13358-023-00291-5.

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Carrillo, Juan D., PÜschel, Hans P. (2023): Pleistocene South American native ungulates (Notoungulata and Litopterna) of the historical Roth collections in Switzerland, from the Pampean Region of Argentina. Swiss Journal of Palaeontology 142 (1): 1-25, DOI: 10.1186/s13358-023-00291-5, URL: http://dx.doi.org/10.1186/s13358-023-00291-5

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50

MONTES DE OCA, FERNANDA, MARCELA S. TONELLO, JULIETA MASSAFERRO, M. SOFIA PLASTANI, and CECILIA LAPRIDA. "THE CHIRONOMIDS (DIPTERA: CHIRONOMIDAE) OF SHALLOW LAKES OF THE HUMID PAMPA REGION, ARGENTINA: AN APPROACH TO PALEOPRODUCTIVITY RECONSTRUCTION." PALAIOS 35, no. 4 (2020): 191–200. http://dx.doi.org/10.2110/palo.2019.071.

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ABSTRACT The Humid Pampa, center-east of Argentina, is the most important socio-economical area of the country. Several shallow lakes have been the focus of many studies due to the significant changes in their trophic status related to human activities and to global warming recorded since the beginning of the twentieth century. Although chironomids have been used extensively in paleoclimatic and paleoenvironmental research, they are rarely used for paleoenvironmental reconstructions of the Pampean shallow lakes. The aim of this paper is to contribute to the knowledge of the chironmids' community composition and distribution in the Pampa region, and to relate their distribution to selected climatic and limnological variables. The ultimate goal is to retrieve new ecological information for future paleoenvironmental and paleoclimate reconstructions by using chironomid-based inference models. In this study, chironomids head capsules were collected from surface sediments from 17 shallow lakes of the Humid Pampa. Our analyses indicate that the chironomid assemblages reflect the decreasing NE-SW rainfall gradient of the region as well as the land use intensity, which in turn affects the aquatic ecosystems, in terms of lake productivity. Some chironomids are associated with brackish conditions (e.g., Chironomus, Ablabesmyia, Tanytarsini D2). Additionally the occurrence of assemblages of detritivore taxa such as Goeldochironomus, Chironomus, Polypedilum, and Dicrotendipes reflect the natural eutrophic state of Pampean shallow lakes, whereas assemblages mostly dominated by Coelotanypus, Procladius, and Chironomus are indicative of hypertrophic conditions, which are usually the result of human activity. This is the first study of chironomids from surface sediments from the central temperate plains of Argentina, and our records extend the ecological information of the Diptera in temperate areas. Although more studies are necessary to fully understand the main factors determining the chironomid fauna distribution in the Pampa region, we conclude that chironomids are potentially good proxies for paleoproductivity and salinity reconstructions of Pampean shallow lakes.

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