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Agriculture is considered an important factor for the decline of amphibians recorded in the last decades. Intensive agriculture requires the application of great amounts of pesticides and fertilizers, consequently many aquatic habitats have been altered. The over-enrichment of waters with nutrients from agriculture causes growth of algae and cyanobacteria and the shift of the community composition toward the dominance of tolerant taxa. The aim of this study was use to analyze the diet of tadpoles and the size of larvae and metamorphs of the native species Rhinella arenarum in agroecosystems of central Argentina. Four sampling sites with different degree of human disturbance were selected, three temporary ponds from agroecosystems (A1, A2, A3), and a pond in a semimodified landscape, not affected by agriculture or cattle. The sites were visited once a week from October 2013 to January 2014. Tadpoles and metamorphs were captured, anesthetize and preserved. Morphometric parameters were measured on tadpoles and metamorphs and for 20 tadpoles the complete intestine was removed and their contents analyzed. Phosphate values were higher in agroecosystem ponds. Body size and mass of tadpoles and metamorphs were different between sites, being smaller in agricultural ponds. Diet analysis revealed that all larvae mainly consumed microalgae. Larval diets allowed differentiating the sites, larvae from A1 and A3 sites showed a diet with a similar composition and structure (with a predominance of Nitzschia palea), meanwhile larvae from A2 and SM showed different diets. In SM, the larvae mainly consumed Trachelomonas sp. Analysis of structural variables revealed a higher algal abundance in the diet of larvae from A3, a lower richness in SM and that there were no differences between sites in diversity and evenness of diets. Our hypothesis was support in part, given that resistant algae taxa were found in agroecosystem ponds and tadpoles and metamorphs were smaller, but larval diets showed higher abundance and richness. The analysis of the diet of aquatic stages of R. arenarum allowed us to know the trophic availability and environmental quality of temporary ponds from agroecosystems. ommercial © 2017, Page Press Publications. All rights reserved.


Documento: Artículo
Título:Anuran larvae diet from agroecosystem’s ponds: Environmental quality and implications for their populations
Autor:Babini, S.; Martina, L.C.; Luque, E.; Gari, N.; Salas, N.; Martino, A.L.
Filiación:Ecología, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional Nº 36 - km 601, Río Cuarto, Córdoba, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
Botánica Sistemática, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta Nacional Nº 36 - km 601, Río Cuarto, Córdoba, Argentina
Palabras clave:Algae; Bioindicator; Diatoms; Metamorphs; Rhinella arenarum; Tadpoles; algae; Amphibia; Bacillariophyta; Bos; Cyanobacteria; Metamorpha; Nitzschia palea; Trachelomonas
Página de inicio:137
Página de fin:147
Título revista:Journal of Limnology
Título revista abreviado:J. Limnol.


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---------- APA ----------
Babini, S., Martina, L.C., Luque, E., Gari, N., Salas, N. & Martino, A.L. (2017) . Anuran larvae diet from agroecosystem’s ponds: Environmental quality and implications for their populations. Journal of Limnology, 76(1), 137-147.
---------- CHICAGO ----------
Babini, S., Martina, L.C., Luque, E., Gari, N., Salas, N., Martino, A.L. "Anuran larvae diet from agroecosystem’s ponds: Environmental quality and implications for their populations" . Journal of Limnology 76, no. 1 (2017) : 137-147.
---------- MLA ----------
Babini, S., Martina, L.C., Luque, E., Gari, N., Salas, N., Martino, A.L. "Anuran larvae diet from agroecosystem’s ponds: Environmental quality and implications for their populations" . Journal of Limnology, vol. 76, no. 1, 2017, pp. 137-147.
---------- VANCOUVER ----------
Babini, S., Martina, L.C., Luque, E., Gari, N., Salas, N., Martino, A.L. Anuran larvae diet from agroecosystem’s ponds: Environmental quality and implications for their populations. J. Limnol. 2017;76(1):137-147.