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(Article of periodic en Anglais - 2011)

Document title

Bioturbation on wildfire-affected southeast Australian hillslopes: Spatial and temporal variation

Authors(s) and Affiliation(s)

RICHARDS P.J. (1) ; HUMPHREYS G.S. (1) ; TOMKINS K.M. (1) ; SHAKESBY R.A. (2) ; DOERR S.H. (2) ;
(1) Dep. of Environment and Geography, Macquarie Univ., Sydney, AUSTRALIE
(2) Dep. of Geography, College of Science, Univ., Swansea, ROYAUME-UNI

Abstract

The AA. quantified variations in surface bioturbation by ants and vertebrates in the sandstone terrain of the Blue Mountains, southeast Australia. Following wildfire during the period late 2001-early 2002, they monitored plots positioned in 6 different slope units and in 2 catchments affected by different wildfire severities. Measurements were made seasonally for 6 years. Rates varied substantially according to slope unit, showing a marked maximum for both ant mounding and total bioturbation on footslopes. Possible reasons for this spatial variation are discussed. A complex response to various soil and ecological factors such as soil texture, soil moisture and vegetation patterns is the most likely explanation. There was also seasonal variability that was not directly related to rainfall. The results substantiate the importance of bioturbation in modifying soil characteristics and influencing soil erosion, especially following a major disturbance event like wildfire

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2011, vol. 87, no1 [pp. 20-30]

Bibliographic references : 48 ref.

Collation : 8 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2011.05.003

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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