Title
Organic matter and wettability characteristics of wildfire ash from Mediterranean conifer forests Organic matter and wettability characteristics of wildfire ash from Mediterranean conifer forests
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Giessen ,
Subject
Physics
Biology
Source (journal)
Catena: an interdisciplinary journal of geomorphology, hydrology, pedology. - Giessen
Volume/pages
135(2015) , p. 369-376
ISSN
0341-8162
ISI
000366225900039
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Thermogravimetric analysis (TGA) and water repellency (wettability) determination of ash samples collected following wildfires at four different Mediterranean conifer forest sites in eastern Spain were conducted to provide insights into variations in key chemical and physical characteristics of ash. TGA allowed the evaluation of organic matter (OM) and inorganic carbonate (IC) characteristics and their role in ash wettability. Thermogravimetric profiles were recorded for 40 ash samples (ten from each site). The persistence of water repellency of all ash samples was assessed by the Water Drop Penetration Time (WDPT) test. OM contents decreased, whilst OM stability indices and IC contents increased with increasing combustion completeness. The highest carbon fixation in IC was determined at the site that had experienced the most severe fire. WDPT values were positively correlated with OM and negatively with IC contents. All strongly to severely water repellent ash samples had OM/IC ratio above 2. Pools of OM in ash formed during wildfires represent a more resistant pool of C compared to their unburned precursors. Together with the new IC pool formed in ash, both pools could represent a carbon sink triggered by wildfire.
E-info
https://repository.uantwerpen.be/docman/iruaauth/935b83/7a865fb2c1d.pdf
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000366225900039&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000366225900039&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000366225900039&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
Handle