Effects of Long‐Term Nutrient Addition on Leaf Metabolites, Herbivory, and Mycorrhizal Spores Associated With a Savannah Woody Species

Alexandra Martins,D. Demarque,R. Dusi,Camille Amorim Costa Santos,L. S. Espindola,Mercedes Maria da Cunha Bustamante

Published 2025 in Austral ecology (Print)

ABSTRACT

Given the importance of soil conditions for ecosystem functioning, fertilisation experiments are a valuable tool for assessing how systems respond to changes in soil properties. However, the effects of changes in nutrient availability on multitrophic interactions in savannah ecosystems of the Brazilian Cerrado are still scarce. We investigated the long‐term effects of soil nutrient addition (N, P, NP, and liming (Ca)) on the leaf metabolomics of the tree Blepharocalyx salicifolius (Kunth) O. Berg (Myrtaceae), changes in herbivory rates, and the spore density of arbuscular mycorrhizal fungi in the rhizosphere. Metabolomic analysis of the leaves indicated a differentiation between B. salicifolius in control plots and the other treatments, with the most pronounced changes observed in response to Ca treatment. The abundance of mycorrhizal spores and leaf damage was higher in the Ca treatment than in the control. Our results show that changes in soil pH and nutrient availability can influence plant physiology and community processes, with significant consequences for ecosystem interactions. We highlight the importance of a broader understanding of how tropical trees respond to nutrient availability changes and the resulting implications for ecosystem functioning.

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