Long-term effects of fire and three firefighting chemicals on a soil - plant system
- 1 January 2011
- journal article
- research article
- Published by CSIRO Publishing in International Journal of Wildland Fire
- Vol. 20 (7), 856-865
- https://doi.org/10.1071/wf10084
Abstract
The effects of fire and firefighting chemicals on soil properties and the soil–plant system were evaluated 5 years after treatment application. Unburnt soils were compared with burnt soils treated with water alone (BS) or with foaming agent (BS+Fo), Firesorb polymer (BS+Fi), or ammonium polyphosphate (BS+Ap). Soils (0–2 cm depth) and foliar material (Ulex micranthus, Pterospartum tridentatum, Erica umbellata and Pinus pinaster) were analysed for total C, total N, δ15N, nutrients (soil-available; plant total), pH and inorganic-N (soils) and vegetation cover and height. No long-term effects of firefighting chemicals on soil properties were found except for pH (BS+Fo > BS+Ap), inorganic-N and P (BS+Ap > other treatments). BS+Ap plants usually showed higher values of δ15N, N, P and Na, but less K. Soil coverage by Pterospartum and Ulex was higher in BS+Ap than in other treatments, whereas the opposite was observed for Erica; shrubs were always taller in BS+Ap. After 3 years of growth, the size of pine seedlings followed the order BS+Ap > unburnt soil > other treatments. Foliar N and P, scrub regeneration and growth of pines showed the long-term fertilising effect of ammonium polyphosphate, although the second highest pine mortality was found in the BS+Ap treatment. The foaming agent did not affect vegetation cover, and Firesorb had no noticeable effect on shrubs but the highest pine mortality.Keywords
This publication has 29 references indexed in Scilit:
- Response of soil microbial communities to fire and fire-fighting chemicalsScience of The Total Environment, 2010
- Short- and medium-term effects of three fire fighting chemicals on the properties of a burnt soilScience of The Total Environment, 2006
- Effect of a long-term fire retardant (Fire Trol 934®) on the germination of nine Mediterranean-type shrub speciesEnvironmental Toxicology and Water Quality, 2005
- High rates of nitrogen fixation of Ulex species in the understory of maritime pine stands and the potential effect of phosphorus fertilizationCanadian Journal of Forest Research, 2005
- Effects of fire on properties of forest soils: a reviewOecologia, 2005
- Effects of the fire retardant Phos-Chek on vegetation in eastern Australian heathlandsInternational Journal of Wildland Fire, 2005
- Assessment of application-rate dependent effects of a long-term fire retardant chemical (Fire Trol 934®) on Typha domingensis germinationEnvironment International, 2004
- Biochemical properties of forest soils as affected by a fire retardantBiology and Fertility of Soils, 2002
- Restoring fire as an ecological process in shortgrass prairie ecosystems: initial effects of prescribed burning during the dormant and growing seasonsJournal of Environmental Management, 2002
- Ecological effects of fire fighting foams and retardants: a summaryAustralian Forestry, 1999