scholarly journals Amphibians of northwestern Buenos Aires province, Argentina: checklist, range extensions and comments on conservation

Check List ◽  
2016 ◽  
Vol 12 (6) ◽  
pp. 1998 ◽  
Author(s):  
María G. Agostini ◽  
Pablo E. Saibene ◽  
Ignacio Roesler ◽  
David Bilenca
Keyword(s):  
Buenos Aires ◽  
Agricultural Practices ◽  
Agricultural Landscapes ◽  
Buenos Aires Province ◽  
Annotated List ◽  
Native Grasslands ◽  
Extant Species ◽  
Short Period ◽  
Conservation Actions

Northwestern Buenos Aires province is located within the Pampas region of Argentina. Agricultural practices have extensively modified native grasslands in a relatively short period, leaving no intact pristine areas. Based on data collected between 2006 and 2015 at 153 ponds in agricultural landscapes, we compiled an annotated list of the amphibians of northwestern Buenos Aires province. We report 13 extant species of amphibians, which represent 43% of the known amphibian diversity in Buenos Aires province, and extend the ranges of three species. Three species found only in herpetological collections extend the list to 16 species. Our study is the first long-term survey of amphibians conducted in this part of Argentina and provides valuable information for future conservation actions across agricultural landscapes.

scholarly journals An annotated list of the reptiles of the highland grassland of Tandilia Mountains, Argentina

2021 ◽  
Vol 16 (1) ◽  
pp. 185-204
Author(s):  
David Gustavo Vera ◽  
Diego Omar Di Pietro ◽  
Germán Tettamanti ◽  
Manuel Eirin ◽  
Clara Trofino Falasco ◽  
...  
Keyword(s):  
Buenos Aires ◽  
Conservation Strategies ◽  
Mountain Range ◽  
Buenos Aires Province ◽  
Conservation Priority ◽  
Annotated List ◽  
Native Grasslands ◽  
Native Grassland ◽  
Mountain System ◽  
Mountain Systems

The study of biodiversity is a fundamental step to develop conservation strategies. Reptile populations are immersed in a global crisis, due to anthropic disturbances. Almost the entire Pampa ecoregion in Argentina was modified for agricultural and livestock activities, the only remnants of mountain native grasslands in Buenos Aires province being the Tandilia and Ventania mountain systems. Ventania reptiles have been exhaustively researched in last years, while Tandilia counts with fewer studies. We presented an actualized reptiles list of the Tandilia Mountain System. We used five data sources to collect presence records: literature, fieldwork, museum collection, citizen science, and a online database. The composition of reptiles from the Tandilia Mountain range includes 26 species in 12 families. Due to the presence of several endemic reptiles, and the representativeness of more than half of the reptiles of Pampa Ecoregion, Tandilia would be useful to determine conservation priority areas to conserve the native grassland and their reptile fauna.

Half a century of sightings data of southern right whales in Mar del Plata (Buenos Aires, Argentina)

2019 ◽  
Vol 100 (1) ◽  
pp. 165-171
Author(s):  
Maria A. Mandiola ◽  
Gisela Giardino ◽  
Julián Bastida ◽  
Sergio Morón ◽  
Diego H. Rodríguez ◽  
...  
Keyword(s):  
Buenos Aires ◽  
Buenos Aires Province ◽  
Western Atlantic ◽  
Right Whale ◽  
Eubalaena Australis ◽  
Coastal Marine ◽  
Past Half Century ◽  
Southern Right Whales ◽  
Inshore Waters

AbstractIn South-western Atlantic waters, individuals of the southern right whale (SRW) Eubalaena australis spend part of the year (the austral winter and spring) in northern inshore waters where they breed and then migrate to southern feeding grounds during the summer. Mar del Plata (MDP) is located between two main reproductive areas (Península Valdés-Argentina and Santa Catarina-Brazil). The purpose of the present study is to report the presence of SRWs on their journey off the coast of MDP based on sighting records during the past half century. We carried out whale observations through systematic weekly coastal marine mammal surveys in different points of the MDP area from 1966 to 2016. The first SRW sighting was recorded in 1970; since then, sighting frequency has gradually increased, reaching a peak of 28 sightings (N = 63 whales) in 2016. These are unique long-term sighting records of SRWs in Argentina and the first on their journey off the shores of Buenos Aires province. We expect that these results will help local authorities to regulate tourism and other activities in the area and thereby contribute to the conservation of the species.

Plant communities and soil phytolith assemblages relationship in native grasslands from southeastern Buenos Aires province, Argentina

CATENA ◽  
2009 ◽  
Vol 76 (2) ◽  
pp. 89-96 ◽  
Author(s):  
Mariana Fernández Honaine ◽  
Margarita L. Osterrieth ◽  
Alejandro F. Zucol
Keyword(s):  
Plant Communities ◽  
Buenos Aires ◽  
Buenos Aires Province ◽  
Native Grasslands

Long-term spatio-temporal dynamics of the mosquito Aedes aegypti in temperate Argentina

2016 ◽  
Vol 107 (2) ◽  
pp. 225-233 ◽  
Author(s):  
S. Fischer ◽  
M.S. De Majo ◽  
L. Quiroga ◽  
M. Paez ◽  
N. Schweigmann
Keyword(s):  
Aedes Aegypti ◽  
Buenos Aires ◽  
Temporal Dynamics ◽  
Spatial Dynamics ◽  
Climatic Conditions ◽  
Buenos Aires Province ◽  
Southern Limit ◽  
Spatio Temporal ◽  
Lower Temperature

AbstractBuenos Aires city is located near the southern limit of the distribution of Aedes aegypti (Diptera: Culicidae). This study aimed to assess long-term variations in the abundance of Ae. aegypti in Buenos Aires in relation to changes in climatic conditions. Ae. aegypti weekly oviposition activity was analyzed and compared through nine warm seasons from 1998 to 2014, with 200 ovitraps placed across the whole extension of the city. The temporal and spatial dynamics of abundances were compared among seasons, and their relation with climatic variables were analyzed. Results showed a trend to higher peak abundances, a higher number of infested sites, and longer duration of the oviposition season through subsequent years, consistent with a long-term colonization process. In contrast, thermal favorability and rainfall pattern did not show a consistent trend of changes. The long-term increase in abundance, and the recently documented expansion of Ae. aegypti to colder areas of Buenos Aires province suggest that local populations might be adapting to lower temperature conditions. The steadily increasing abundances may have implications on the risk of dengue transmission.

Does our lack of vision threaten the viability of the reconstruction of disturbed ecosystems?

1995 ◽  
Vol 2 (4) ◽  
pp. 321 ◽  
Author(s):  
Denis A. Saunders
Keyword(s):  
Biological Diversity ◽  
Agricultural Practices ◽  
Community Action ◽  
Agricultural Landscapes ◽  
Clear Understanding ◽  
Ecological Processes ◽  
Legislative Action ◽  
Sustainable Agricultural Practices ◽  
Ecologically Sustainable

There is widespread acceptance that in the extensive wheat-sheep zone of Australia, development for agriculture and associated changes to ecological processes have resulted in major problems of loss of species, land degradation and potential decreases in agricultural productivity. Present agricultural practices are not sustainable. There has been a range of responses to these changes, from community action through Landcare and revegetation projects, to legislative action. Unfortunately, these responses and the actions that follow, are usually carried out without any long-term context or any clear understanding of what we want our agricultural landscapes to look like in 150?200 years. While phrases such as "achieve the conservation of biological diversity through the adoption of ecologically sustainable agricultural practices" are being widely used, they will never become reality without the development of a vision of what we as a society want these landscapes to look like and how we want them to function. As a matter of urgency, we should develop a collective vision for the future of our agricultural landscapes and use that vision to provide the framework to integrate conservation of the biota with management for agricultural production, while addressing the environmental problems we face now or which may arise as we adapt management to changing environmental conditions.

scholarly journals Infection patterns of the chytrid fungus, Batrachochytrium dendrobatidis, on anuran assemblages in agro-ecosystems from Buenos Aires Province, Argentina

2015 ◽  
Vol 14 (2) ◽  
pp. 113 ◽  
Author(s):  
M. Gabriela Agostini ◽  
Patricia A. Burrowes
Keyword(s):  
Land Use ◽  
Batrachochytrium Dendrobatidis ◽  
Buenos Aires ◽  
Agricultural Landscapes ◽  
Buenos Aires Province ◽  
Chytrid Fungus ◽  
Infection Level ◽  
Tissue Samples ◽  
High Prevalence ◽  
The Impact

Infection patterns of the chytrid fungus, Batrachochytrium dendrobatidis, on anuran assemblages in agro-ecosystems from Buenos Aires Province, Argentina. The disease chytridiomycosis, caused by the pathogenic chytrid fungus Batrachochytrium dendrobatidis (Bd), is linked to extinctions and declines of amphibians. Additionally, in the context of amphibian decline, the habitat loss related to agricultural landscapes is likely the single most important human activity affecting lowland amphibian populations. To assess the impact of anthropogenic land use on anuran response to Bd, infection patterns in several ponds from cultivated (CA) and uncultivated areas (UCA) were studied. Four anuran species (Rhinella fernandezae [Bufonidae]; juvenile and adult of Leptodactylus latrans [Leptodactylidae]; and the hylids Hypsiboas pulchellus and Pseudis minuta) were monitored and tissue samples were collected for Bd diagnosis and quantification. All species tested positive for Bd, but anurans inhabiting the UCA were twice more likely to be infected than those in the CA. Prevalence and infection level were significantly higher in the UCA, suggesting that vulnerability to Bd is associated with land use in agro-ecosystems. At the assemblage-level, the infection patterns also differed among species, and those with aquatic habitats (L. latrans and P. minuta) had high prevalence and infection levels of Bd. Juvenile stages of L. latrans had higher prevalence and infection level than adults in both study areas. This work contributes to our understanding of anthropogenic effects on host-pathogen relationships, particularly on the effect of Bd on anuran assemblages under different levels of agricultural impact.

International Opera in Nineteenth-century New York

2020 ◽  
pp. 244-269
Author(s):  
Karen Ahlquist
Keyword(s):  
Nineteenth Century ◽  
New York ◽  
New York City ◽  
World War I ◽  
Buenos Aires ◽  
Considerable Extent ◽  
World War ◽  
Metropolitan Opera ◽  
The City

This chapter charts how canonic repertories evolved in very different forms in New York City during the nineteenth century. The unstable succession of entrepreneurial touring troupes that visited the city adapted both repertory and individual pieces to the audience’s taste, from which there emerged a major theater, the Metropolitan Opera, offering a mix of German, Italian, and French works. The stable repertory in place there by 1910 resembles to a considerable extent that performed in the same theater today. Indeed, all of the twenty-five operas most often performed between 1883 and 2015 at the Metropolitan Opera were written before World War I. The repertory may seem haphazard in its diversity, but that very condition proved to be its strength in the long term. This chapter is paired with Benjamin Walton’s “Canons of real and imagined opera: Buenos Aires and Montevideo, 1810–1860.”

scholarly journals Effect of ecological and conventional managements on soil enzymatic activities in coffee agroecosystems

2018 ◽  
Vol 48 (4) ◽  
pp. 420-428
Author(s):  
Johana Juliet Caballero Vanegas ◽  
Karen Bibiana Mejía Zambrano ◽  
Lizeth Manuela Avellaneda-Torres
Keyword(s):  
Sustainable Management ◽  
Climatic Variability ◽  
Agricultural Practices ◽  
Enzymatic Activities ◽  
Acid And Alkaline Phosphatase ◽  
Dry Seasons ◽  
Synthetic Fertilizers ◽  
Coffee Agroecosystems ◽  
Alkaline And Acid Phosphatase

ABSTRACT Understanding the impacts of agricultural practices on soil quality indicators, such as enzymatic activities, is of great importance, in order to advance in their diagnosis and sustainable management. This study aimed to evaluate the effect of ecological and conventional agricultural managements on enzymatic activities of a soil under coffee agroecosystems. The enzymatic activities were associated with the biogeochemical cycles of nitrogen (urease and protease), phosphorus (acid and alkaline phosphatase) and carbon (β-glucosidase), during the rainy and dry seasons. Physical-chemical soil proprieties were also assessed and related to resilience scores linked to the climatic variability reported for the areas under study. The activities of urease, alkaline and acid phosphatase and ß-glucosidase were statistically higher in ecological agroecosystems than in conventional ones. This may be attributed to the greater application of organic waste in the ecological environment, as well as to the absence of pesticides and synthetic fertilizers, which allow better conditions for the microbial activity. The resilience scores to the climate variability that showed the highest correlations with the assessed enzymatic activities were: the farmers' knowledge on soil microorganisms, non-use of pesticides and synthetic fertilizers and non-dependence on external supplies. It was concluded that the enzymatic activities are modified by the management systems, being specifically favored by the ecological management. This agroecosystem, in the long term, ensures an efficient use of the soil resources, with a lower degradation and contamination.

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