Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14014 |
Rapid soil formation after glacial retreat shaped by spatial patterns of organic matter accrual in microaggregates | |
Schweizer, Steffen A.1; Hoeschen, Carmen1; Schlueter, Steffen2; Koegel-Knabner, Ingrid1,3; Mueller, Carsten W.1 | |
2018-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:4页码:1637-1650 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Global change contributes to the retreat of glaciers at unprecedented rates. The deglaciation facilitates biogeochemical processes on glacial deposits with initiating soil formation as an important driver of evolving ecosystems. The underlying mechanisms of soil formation and the association of soil organic matter (SOM) with mineral particles remain unclear, although further insights are critical to understand carbon sequestration in soils. We investigated the microspatial arrangement of SOM coatings at intact soil microaggregate structures during various stages of ecosystem development from 15 to >700years after deglaciation in the proglacial environment of the Damma glacier (Switzerland). The functionally important clay-sized fraction (<2m) was separated into two density fractions with different amounts of organo-mineral associations: light (1.6-2.2g/cm(3)) and heavy (>2.2g/cm(3)). To quantify how SOM extends across the surface of mineral particles (coverage) and whether SOM coatings are distributed in fragmented or connected patterns (connectivity), we developed an image analysis protocol based on nanoscale secondary ion mass spectrometry (NanoSIMS). We classified SOM and mineral areas depending on the O-16(-), C-12(-), and (CN-)-C-12-N-14 distributions. With increasing time after glacial retreat, the microspatial coverage and connectivity of SOM increased rapidly. The rapid soil formation led to a succession of patchy distributed to more connected SOM coatings on soil microaggregates. The maximum coverage of 55% at >700years suggests direct evidence for SOM sequestration being decoupled from the mineral surface, as it was not completely masked by SOM and retained its functionality as an ion exchange site. The chemical composition of SOM coatings showed a rapid change toward a higher CN:C ratio already at 75years after glacial retreat, which was associated with microbial succession patterns reflecting high N assimilation. Our results demonstrate that rapid SOM sequestration drives the microspatial succession of SOM coatings in soils, a process that can stabilize SOM for the long term. |
英文关键词 | biogeochemical soil interfaces glacier forefield mineral-associated organic matter nanoscale secondary ion mass spectrometry organic coating organo-mineral associations soil carbon sequestration spatial complexity |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426504400017 |
WOS关键词 | ION MASS-SPECTROMETRY ; MINERAL ASSOCIATIONS ; DAMMA GLACIER ; BIOGEOCHEMICAL INTERFACES ; TEMPERATE SOILS ; ALPINE GLACIER ; CLIMATE-CHANGE ; CHRONOSEQUENCE ; FOREFIELD ; SWITZERLAND |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17209 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Tech Univ Munich, Chair Soil Sci, TUM Sch Life Sci Weihenstephan, Freising Weihenstephan, Germany; 2.UFZ Helmholtz Ctr Environm Res, Dept Soil Syst Sci, Halle, Saale, Germany; 3.Tech Univ Munich, Inst Adv Study, Garching, Germany |
推荐引用方式 GB/T 7714 | Schweizer, Steffen A.,Hoeschen, Carmen,Schlueter, Steffen,et al. Rapid soil formation after glacial retreat shaped by spatial patterns of organic matter accrual in microaggregates[J]. GLOBAL CHANGE BIOLOGY,2018,24(4):1637-1650. |
APA | Schweizer, Steffen A.,Hoeschen, Carmen,Schlueter, Steffen,Koegel-Knabner, Ingrid,&Mueller, Carsten W..(2018).Rapid soil formation after glacial retreat shaped by spatial patterns of organic matter accrual in microaggregates.GLOBAL CHANGE BIOLOGY,24(4),1637-1650. |
MLA | Schweizer, Steffen A.,et al."Rapid soil formation after glacial retreat shaped by spatial patterns of organic matter accrual in microaggregates".GLOBAL CHANGE BIOLOGY 24.4(2018):1637-1650. |
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