Evelina Leon

Evelina Leon
Amphibians Ecotoxicolgy Lab (FBCB-UNL-CONICET) - Instituto Nacional de Limnología (INALI)

PhD in biological sciences

About

24
Publications
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85
Citations

Publications

Publications (24)
Poster
Full-text available
CONICET HUMEDALES DEL RÍO PARANÁ Severidad in situ: porcentaje de vegetación quemada por estratos, profundidad de quema en el suelo (cm), intensidad (altura de la llama, m), presencia de frutos-semillas en el suelo.  Registros de indicios de regeneración (signos de rebrote basales o plántulas) luego de la inspección primaria (24-168h)  método de...
Poster
Full-text available
OBJETIVOS Evaluar a corto plazo (24-196 h, CP) y mediano plazo (3-4 meses, MP) los efectos de los incendios sobre el suelo, vegetación y fauna de tetrápodos en 17 humedales distribuidos en el río Paraná Medio (Jul.-Set. 2020). Vincular datos de campo y análisis espectrales (severidad normalizada-dNBR e índice de vegetación normalizada-NDVI) con i...
Article
Full-text available
Tadpoles detect chemical signals released from predators and conspecifics, and those present in the environment, and adjust their behavioral responses. This study evaluated the swimming activity of Rhinella dorbignyi (Duméril and Bibron, 1941) tadpoles exposed to chemical signals, including cues from a predator fish Synbranchus marmoratus Bloch, 19...
Article
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Dexamethasone (DEX) is a glucocorticoid highly effective as an anti-inflammatory, immunosuppressant and decongestant drug. In the present study, a preliminary acute toxicity test was assayed in order to determinate DEX median-lethal, lowest-observed-effect and the no-observed effect concentrations (LC50, LOEC and NOEC, respectively) on the common t...
Article
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Introduction: Recognition of the variety of ecosystem services that biodiversity performs in agroecosystems is one of the basic principles of agroecology. Because indices of functional diversity may be directly related with ecosystem services, an assessment of functional diversity can be useful for evaluating ecosystem services provided under agroe...
Article
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RESUMEN Se dan a conocer la nómina de especies identificadas en un ambiente de cultivo rotativo (trigo-soja) próximo a la ciudad de Paraná (31º 42´ 02´´ S 60º 21´ 55´´ W), durante el período junio 2006-febrero 2008. Se identificaron un total de 31 especies las que fueron agrupadas en un total de 10 gremios tróficos. Los que tuvieron mayor represent...
Article
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Study of temporal variation of bird assemblages may be particularly important in highly dynamic ecosystems as fluvial wetlands to identify the factors that influence and contribute to the maintaining of regional diversity. We study temporal variation in regional bird species composition and richness and the factors that drive it in the fluvial syst...
Article
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Winter diet of Bobolinks (Dolichonyx oryzivorus), a bird considered a pest of rice fields, is known to consist primarily of seeds. However, it is not yet possible to establish the extent to which non-rice plants and animal components contribute to its diet. To contribute to these issues, we studied the diet of the Bobolink found in rice fields on i...
Article
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Increased anthropogenic-made sounds such as traffic noises contribute to acoustic pollution, which produces deleterious effect on song-vertebrates. We compared the advertisement call of Scinax nasicus (Cope, 1862) males in natural (as a reference or control, Site A) and Sites affected by traffic noises (Site B). Call structure was recorded and it w...
Article
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Reproductive biology of the Roseate Spoonbill Platalea ajaja in Santa Fe, Argentina The reproductive biology of the Roseate Spoonbill Platalea ajaja was studied in the Ecological Reserve of the Universidad Nacional del Litoral, Santa Fe, (Argentina) in 2016. From Sep-tember onwards, five nests were monitored in a mixed colony. The nests were built...
Article
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Responses of waterbirds to habitat variation could account for their responses to fluctuations in river levels because hydrological fluctuations influence habitat availability across floodplains. Relationships between water level and waterbird occurrence were examined in floodplain wetlands of the Middle Paraná River to assess (a) whether occurrenc...
Article
The whistling heron (Syrigma sibilatrix) is a neotropical species that inhabits aquatic environments, rural areas and groves. We studied the diet of 19 birds in Carabajal Island (31°39´S, 60°42´W) from 1999 to 2003. The trophic spectrum was composed of 14 taxonomic units of animal taxa. Trophic diversity ranged between 0.23 and 2.15. Index of relat...
Article
Full-text available
Se estudió la dieta de Syrigma sibilatrix (n=19) en la isla Carabajal (31°39’ S y 60°42’ O) desde 1999 hasta 2003. El espectro trófico resultó integrado por 14 entidades taxonómicas de la fracción animal. El índice de diversidad trófica de Brillouin varió entre 0,23 - 2,15. Los valores del índice de importancia relativa fueron: insectos = 10780, ar...
Article
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Over the last years, researchers have addressed the automatic classification of calling bird species. This is important for achieving more exhaustive environmental monitoring and for managing natural resources. Vocalisations help to identify new species, their natural history and macro-systematic relations, while computer systems allow the bird rec...
Article
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The reproductive biology of the Striated Heron (Butorides striata) was studied in the lagoon of the Reserve of the Universidad Nacional del Litoral, Santa Fe, Argentina, during two breeding seasons: September 2012–February 2013 (n = 77) and September 2013–March 2014 (n = 125). All nests (n = 202) were built on waxy-leaf nightshade (Solanum glaucoph...
Article
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Bird communication is a growing field of study in ethology and evolutionary biology; however, most known studies were conducted only in the northern hemisphere. We measured six temporal and structural features of golden-billed saltator (Saltator aurantiirostris) song and recorded 57 vocalizations at Parque San Martín reserve (Argentina). Results in...
Article
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Urban and suburban ecosystems are areas that, despite of being modified by human activities, can sustain a large amount of biodiversity. Acoustic field alterations affect communication among animals, threatening the populations' stability dynamics. In birds, where acoustic communication take place at a certain distance, signals that reach the recep...
Article
Full-text available
We analysed the feeding ecology of Nycticorax nycticorax based on fourty individuals captured on the Carabajal Island (Santa Fe, 31 degrees 39'S, 60 degrees 42'W), determining the minimum sample, index of relative importance (IRI), size of prey, feeding efficiency, dietary selectivity, amplitude of the trophic niche, circadian rhythm of feeding act...

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