Show simple item record

dc.contributor.author
Franco, André L.C.
dc.contributor.author
Cherubin, Maurício R.
dc.contributor.author
Cerri, Carlos E.P.
dc.contributor.author
Six, Johan
dc.contributor.author
Wall, Diana H.
dc.contributor.author
Cerri, Carlos C.
dc.date.accessioned
2020-09-18T12:19:51Z
dc.date.available
2020-09-18T02:47:14Z
dc.date.available
2020-09-18T12:19:51Z
dc.date.issued
2020-11
dc.identifier.issn
0038-0717
dc.identifier.issn
1879-3428
dc.identifier.other
10.1016/j.soilbio.2020.107998
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/441119
dc.description.abstract
Land use changes (LUC) for the expansion of bioenergy cropping have caused consistent reductions in soil organic carbon (SOC) stocks in tropical soils. This study addresses the mechanisms underlying such SOC losses by assessing LUC effects on, and relationships between, soil engineering invertebrate fauna, soil structural stability, and C allocation and sequestration within soil aggregates. We sampled three sites with sets of land use types varying in the level of anthropogenic stress in sandy loam, sand clay loam, and clay soils along a 1000-km-long transect in central Brazil, where bioenergy cropping expands across pasturelands. We quantified the effects of LUC on soil engineer fauna (i.e., termites, earthworms, coleopterans, and ants), soil structural stability, and C allocation and fitted structural equation models (SEM) to elucidate mechanistic links between the measured variables. We found that reductions in SOC stocks following LUC were concomitant with reductions in the abundance of soil engineers (log abundance of soil engineers, −1.17 ± 0.54; P = 0.0322), destabilization of soil structure (normalized stability index, −0.16 ± 0.04; P < 0.0001), and soil depth-dependent decreases in the amounts and increases in the humification degree of aggregate-occluded SOC. Our SEMsupported the predicted relationships among these responses, and indicated that soil engineering by invertebrates indirectly mediated changes in SOC stocks across land uses by controlling the physical protection of low-humified, aggregate-occluded SOC, a C fraction that accounted for over 90% of the change in total SOC stocks following LUC. When analysing the influence of the different invertebrate groups separately, we found stronger support for the role of termites in this process compared to that of earthworms, coleopterans, and ants. Hence, negative LUC effects on populations of soil engineers weaken soil functioning and its C storage. These results highlight the need for land-use strategies that maintain soil fauna in order to sustain key ecosystem processes like soil structural formation and soil C stabilization. © 2020 Elsevier Ltd.
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.subject
Land-use change
en_US
dc.subject
Carbon stocks
en_US
dc.subject
Soil aggregation
en_US
dc.subject
Soil fauna
en_US
dc.subject
Soil organic matter
en_US
dc.subject
Termites
en_US
dc.title
Linking soil engineers, structural stability, and organic matter allocation to unravel soil carbon responses to land-use change
en_US
dc.type
Journal Article
dc.date.published
2020-09-04
ethz.journal.title
Soil Biology and Biochemistry
ethz.journal.volume
150
en_US
ethz.journal.abbreviated
Soil biol. biochem.
ethz.pages.start
107998
en_US
ethz.size
12 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
2020-09-18T02:47:26Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2020-09-18T12:20:04Z
ethz.rosetta.lastUpdated
2021-02-15T17:20:20Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.atitle=Linking%20soil%20engineers,%20structural%20stability,%20and%20organic%20matter%20allocation%20to%20unravel%20soil%20carbon%20responses%20to%20land-use%20change&amp;rft.jtitle=Soil%20Biology%20and%20Biochemistry&amp;rft.date=2020-11&amp;rft.volume=150&amp;rft.spage=107998&amp;rft.issn=0038-0717&amp;1879-3428&amp;rft.au=Franco,%20Andr%C3%A9%20L.C.&amp;Cherubin,%20Maur%C3%ADcio%20R.&amp;Cerri,%20Carlos%20E.P.&amp;Six,%20Johan&amp;Wall,%20Diana%20H.&amp;rft.genre=article&amp;rft_id=info:doi/10.1016/j.soilbio.2020.107998&amp;
 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