Steffens, Markus und Rogge, Derek M. und Mueller, Carsten W. und Höschen, Carmen und Lugmeier, Johann und Kölbl, Angelika und Kögel-Knabner, Ingrid (2017) Identification of Distinct Functional Microstructural Domains Controlling C Storage in Soil. Environmental Science & Technology, 51 (21), Seiten 12182-12189. American Chemical society (ACS). doi: 10.1021/acs.est.7b03715. ISSN 0013-936X.
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Offizielle URL: http://pubs.acs.org/doi/10.1021/acs.est.7b03715
Kurzfassung
The physical, chemical, and biological processes forming the backbone of important soil functions (e.g., carbon sequestration, nutrient and contaminant storage, and water transport) take place at reactive interfaces of soil particles and pores. The accessibility of these interfaces is determined by the spatial arrangement of the solid mineral and organic soil components, and the resulting pore system. Despite the development and application of novel imaging techniques operating at the micrometer and even nanometer scale, the microstructure of soils is still considered as a random arrangement of mineral and organic components. Using nanoscale secondary ion mass spectroscopy (NanoSIMS) and a novel digital image processing routine adapted from remote sensing (consisting of image preprocessing, endmember extraction, and a supervised classification), we extensively analyzed the spatial distribution of secondary ions that are characteristic of mineral and organic soil components on the submicrometer scale in an intact soil aggregate (40 measurements, each covering an area of 30 μm × 30 μm with a lateral resolution of 100 nm × 100 nm). We were surprised that the 40 spatially independent measurements clustered in just two complementary types of micrometer-sized domains. Each domain is characterized by a microarchitecture built of a definite mineral assemblage with various organic matter forms and a specific pore system, each fulfilling different functions in soil. Our results demonstrate that these microarchitectures form due to self-organization of the manifold mineral and organic soil components to distinct mineral assemblages, which are in turn stabilized by biophysical feedback mechanisms acting through pore characteristics and microbial accessibility. These microdomains are the smallest units in soil that fulfill specific functionalities.
elib-URL des Eintrags: | https://elib.dlr.de/114614/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||
Titel: | Identification of Distinct Functional Microstructural Domains Controlling C Storage in Soil | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 2017 | ||||||||||||||||||||||||||||||||
Erschienen in: | Environmental Science & Technology | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||
Band: | 51 | ||||||||||||||||||||||||||||||||
DOI: | 10.1021/acs.est.7b03715 | ||||||||||||||||||||||||||||||||
Seitenbereich: | Seiten 12182-12189 | ||||||||||||||||||||||||||||||||
Verlag: | American Chemical society (ACS) | ||||||||||||||||||||||||||||||||
ISSN: | 0013-936X | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | Soil, XRD, NanoSIMS, carbon | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Erdbeobachtung | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | Vorhaben Spektroskopische Verfahren in der Fernerkundung (alt) | ||||||||||||||||||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Deutsches Fernerkundungsdatenzentrum > Landoberfläche | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Heiden, Dr.rer.nat. Uta | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 27 Nov 2017 10:09 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 06 Sep 2019 15:25 |
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