dc.contributor.author |
Huang X. |
|
dc.contributor.author |
Li Y. |
|
dc.contributor.author |
Guggenberger G. |
|
dc.contributor.author |
Kuzyakov Y. |
|
dc.contributor.author |
Liu B.F. |
|
dc.contributor.author |
Wu J. |
|
dc.date.accessioned |
2021-02-25T20:59:26Z |
|
dc.date.available |
2021-02-25T20:59:26Z |
|
dc.date.issued |
2020 |
|
dc.identifier.issn |
2051-8153 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/162836 |
|
dc.description.abstract |
© The Royal Society of Chemistry 2020. The emerging consensus on organic matter (OM) cycling in soil and sediment proposes that a continuum of biological and geochemical processes in the micro-environment controls the fate of OM. However, spatio-temporal observation of the biogeochemical nature and behaviour of OM at the soil-water interfaces (SWIs) is impeded by the heterogonous and opaque nature of their microenvironment. Herein, we used a novel SoilChip method (soil microarrays incubated with a predefined solution) to continuously mimic and trace the OM biogeochemistry at SWIs for 21 days. Combining X-ray photoelectron spectroscopy and ion sputtering on SoilChips, we provided the first direct evidence that a nanoscale organic film with a distinct composition and thickness gradually formed at the SWI within 21 days of cultivation. Although the OM coating on the SWI quickly reached equilibrium within 4 days, the formation of thicker mineral-organic association (MOA, 20-130 nm) and microbial biomass (>130 nm) continued, partially at the cost of the thin MOA (<20 nm). Consistent with the thickening SWI, the bioavailability of nutrients (dissolved organic C and ammonium) decreased gradually over 21 days, which restrained the microbial activities. Collectively, thickening SWIs act as a biogeochemical gate to regulate the bioavailability of specific organic compounds and determine their preservation or microbial mineralization. Further, thickening SWIs in thez-axis direction provide direct structural insight to increase carbon sequestration in soil and sediment. |
|
dc.relation.ispartofseries |
Environmental Science: Nano |
|
dc.title |
Direct evidence for thickening nanoscale organic films at soil biogeochemical interfaces and its relevance to organic matter preservation |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
9 |
|
dc.relation.ispartofseries-volume |
7 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
2747 |
|
dc.source.id |
SCOPUS20518153-2020-7-9-SID85091867626 |
|