Effect of fire severity and presence of bamboo (Chusquea culeou) on soil chemical properties in Andean Patagonian forests of Argentina

M. Florencia Urretavizcaya; M. Melisa Rago; Marina Caselli; Fernanda Ríos Campano; Stefano Gianolini; Virginia Alonso

doi:10.1071/WF24011

RESEARCH ARTICLE (Open Access)

Effect of fire severity and presence of bamboo (Chusquea culeou) on soil chemical properties in Andean Patagonian forests of Argentina

M. Florencia Urretavizcaya ^A ^* , M. Melisa Rago ^A , Marina Caselli ^A , Fernanda Ríos Campano ^A , Stefano Gianolini ^A and Virginia Alonso ^B

+ Author Affiliations

- Author Affiliations

^A Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP) – Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET), Ruta 259 Km 16.24, Esquel, Chubut, Argentina.

^B CIEFAP-Universidad Nacional de la Patagonia San Juan Bosco, Ruta 259 Km 16.24, Esquel, Chubut, Argentina.

^* Correspondence to: mfurretavizcaya@ciefap.org.ar

International Journal of Wildland Fire 34, WF24011 https://doi.org/10.1071/WF24011

Submitted: 20 January 2024 Accepted: 23 January 2025 Published: 19 February 2025

© 2025 The Author(s) (or their employer(s)). Published by CSIRO Publishing on behalf of IAWF. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND)

Abstract

Background

Fire is recurrent in Patagonian forests of Argentina, and is frequently associated with the die-off of bamboo (Chusquea culeou). Fire induces changes in soil properties, which may affect vegetation recovery.

Aims

This study assesses how fire severity affects soil chemical properties in different Patagonian forests, in the absence and presence of C. culeou.

Methods

We collected samples from the upper 5 cm of mineral soil from 44 plots distributed in five forest types affected by low-severity and high-severity fire, and unburned areas. Half of the plots also had C. culeou.

Key results

Fire severity affected soil pH, organic matter, electrical conductivity, nitrogen, C:N ratio, and cation exchange capacity. Changes in organic matter and C:N ratio varied among forest type, and variations in pH and sodium were detected among forest types. The presence of C. culeou affected soil pH, C:N ratio, and calcium.

Conclusions

The changes recorded were expected and could have a lasting effect on long-term productivity. Nothofagus pumilio and Nothofagus antarctica, and forests with C. culeou, varied in their soil chemical properties, sometimes regardless of fire.

Implications

Considering the heterogeneity of vegetation and soil in postfire environments is vital for predicting possible successional trajectories and defining restoration objectives.

Keywords: Austrocedrus, Chusquea, Nothofagus, Patagonia, post-fire changes, temperate forests, topsoil properties, volcanic soils, wildfire.

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