Show simple item record

dc.contributor.author
Enriquez, Andrea S.
dc.contributor.author
Necpálová, Magdalena
dc.contributor.author
Cremona, María V.
dc.contributor.author
Peri, Pablo L.
dc.contributor.author
Six, Johan
dc.date.accessioned
2021-03-04T07:57:02Z
dc.date.available
2021-03-04T04:24:21Z
dc.date.available
2021-03-04T07:57:02Z
dc.date.issued
2021-06-15
dc.identifier.issn
0016-7061
dc.identifier.issn
1872-6259
dc.identifier.other
10.1016/j.geoderma.2021.114987
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/472844
dc.description.abstract
Although volcanism may be perceived by the society as a phenomenon with mostly negative consequences, this is not always the case especially for natural systems. There is a limited knowledge on how the deposited pristine ash becomes immobilized and stabilized in the soil after the volcanic event. Here, we studied processes of soil aggregates formation in the buried ash layer in an early stage of the succession as well as the influence of the biological legacy (previous land management history) on these processes after the 2011 volcanic event of the Puyehue–Cordón Caulle Volcanic Complex. 5.5 years after the eruption we collected soil cores to a 10 cm depth in wet and mesic meadows with good and poor grassland conditions induced by light and heavy grazing intensity, respectively, in the East semiarid region of North Patagonia, Argentina. The ash layer was observed down to 5 cm from the soil surface, clearly differentiating a newly developed soil layer formed after the volcanic event. Accordingly, the top 5 cm were examined for the distribution of different size fractions of water-stable soil aggregates and their associated organic carbon (C) and total nitrogen (N) contents. We detected signs of physical and physicochemical changes in respect to the pristine ash collected at these sites in 2011. Soil neoformation processes were detected through the presence of large (4%) and small (21%) macroaggregates, although microaggregates (~45%) and silt + clay fractions (~29%) dominated the soil mass (ash-soil matrix: 0–5 cm depth). C and N contents decreased in a sequence: large macroaggregates ≥ small macroaggregates > microaggregates ≥ silt + clay, highlighting the importance of soil organic matter in the formation of larger-size aggregates and their quality (C and N contents). Biological legacy influenced soil aggregate formation and their quality, as reflected by a higher mass of small macroaggregates and a lower mass of microaggregates (only in mesic meadows) and by higher C and N contents under good grassland conditions. The seasonal hydrological conditions of meadow soils (i.e., soil water content, wetting and drying cycles) via effects on biological and physical processes likely resulted in a reduced aggregation in wet meadows. We noticed an incipient but present soil aggregation processes in these semiarid wetlands translated in the immobilization and stabilization of the buried ashes in the soil. The total C content in the new 0–5 cm soil layer increased at a rate of 1.0 Mg C ha−1 yr−1, on average. This indicates a functional recovery of the ecosystem along with a substantial CO2 mitigation potential in the ashes stabilized with soil organic matter, which might partially counterbalance CO2 emitted during the eruption. © 2021 Elsevier
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.subject
Volcanic ash
en_US
dc.subject
Soil forming processes
en_US
dc.subject
Aggregate forming processes
en_US
dc.subject
Patagonian wetlands
en_US
dc.title
Immobilization and stabilization of volcanic ash in soil aggregates in semiarid meadows of Northern Patagonia
en_US
dc.type
Journal Article
dc.date.published
2021-02-24
ethz.journal.title
Geoderma
ethz.journal.volume
392
en_US
ethz.journal.abbreviated
Geoderma
ethz.pages.start
114987
en_US
ethz.size
14 p.
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03982 - Six, Johan / Six, Johan
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03982 - Six, Johan / Six, Johan
ethz.date.deposited
2021-03-04T04:24:41Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-03-04T07:57:13Z
ethz.rosetta.lastUpdated
2022-03-29T05:36:28Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Immobilization%20and%20stabilization%20of%20volcanic%20ash%20in%20soil%20aggregates%20in%20semiarid%20meadows%20of%20Northern%20Patagonia&rft.jtitle=Geoderma&rft.date=2021-06-15&rft.volume=392&rft.spage=114987&rft.issn=0016-7061&1872-6259&rft.au=Enriquez,%20Andrea%20S.&Necp%C3%A1lov%C3%A1,%20Magdalena&Cremona,%20Mar%C3%ADa%20V.&Peri,%20Pablo%20L.&Six,%20Johan&rft.genre=article&rft_id=info:doi/10.1016/j.geoderma.2021.114987&
 Search print copy at ETH Library

Files in this item

FilesSizeFormatOpen in viewer

There are no files associated with this item.

Publication type

Show simple item record