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Artículo

Pay it forward: refuse dump from leaf-cutting ants promotes caterpillar digestive performance by increasing plant nitrogen content

Lescano, María NataliaIcon ; Quintero, CarolinaIcon ; Farji Brener, Alejandro GustavoIcon ; Balseiro, Esteban GabrielIcon
Fecha de publicación: 09/02/2019
Editorial: Wiley Blackwell Publishing, Inc
Revista: Ecological Entomology
ISSN: 0307-6946
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ecología

Resumen

1. The activity of soil-disturbing animals that increase soil nutrients can affect the carbon : nitrogen (C : N) ratio of plants, which, in turn, may determine the transfer of energy and nutrients through higher trophic levels. However, the strength and sign of this indirect effect depend on whether enhanced nutrient substrates increase plant foliar nutrients and/or plant defensive traits. 2. We investigated how the nutrient-rich refuse dumps of the leaf-cutting ant Acromyrmex lobicornis, as a result of their direct effects on thistles, indirectly impact the growth rate and digestive performance of a generalist chewing herbivore. We also included the application of commercial fertilisers to test whether the enhanced soil nutrients comprises the mechanism behind the impact of refuse dumps on the upward cascade effects. 3. Thistles growing on nutrient-rich substrates (i.e. ant refuse dumps and fertilised soil) had more and larger leaves, up to 80% lower C : N ratios, and higher physical defences compared to plants growing on steppe soil. Caterpillars showed an enhanced digestive performance and growth rate when feed on nutrient-rich plants and were able to adjust the C : N ratio of their excretion to regulate the relative acquisition of nutrients. 4. The positive effect of nutrient-rich substrates on caterpillar feeding efficiency suggest that the enhanced nutritional quality of the thistles could compensate for the negative effects of the increased physical defences. The results of the present study indicate how organisms that increase soil nutrient availability may diminish the stoichiometric constraints at the base of food chains, enhancing the development and growth rate of herbivores and, thus, indirectly mediating plant–herbivore interactions.
Palabras clave: ACROMYRMEX LOBICORNIS , COPITARSIA GIBBEROSA , ECOLOGICAL STOICHIOMETRY , NUTRITIONAL INDICES , SOIL NUTRIENTS
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/94181
URL: https://onlinelibrary.wiley.com/doi/full/10.1111/een.12667
DOI: http://dx.doi.org/10.1111/een.12667
Colecciones
Articulos(INIBIOMA)
Articulos de INST. DE INVEST.EN BIODIVERSIDAD Y MEDIOAMBIENTE
Citación
Lescano, María Natalia; Quintero, Carolina; Farji Brener, Alejandro Gustavo; Balseiro, Esteban Gabriel; Pay it forward: refuse dump from leaf-cutting ants promotes caterpillar digestive performance by increasing plant nitrogen content; Wiley Blackwell Publishing, Inc; Ecological Entomology; 44; 1; 9-2-2019; 40-49
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