Soil organic matter composition and transformation in gelic histosols of coastal continental antarctica

Beyer, L.; Sorge, C.; Blume, Hans‐Peter; Schulten, H.‐R.

doi:10.1016/0038-0717(95)00054-i

Cited by 50 publications

(35 citation statements)

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“…This and an additional high content of sterols was distinct for gelic histosols from the Antarctica (Beyer et al, 1995 ). Plaggic anthrosols from Northwest Germany also showed high proportions of lipids, alkylaromatics, sterols, and free fatty acids.…”

Section: Nonfractionated Whole Soil Organic Matter: Factors Infl Uencmentioning

confidence: 85%

“…The thermograms for the sum of these marker signals in Figure 14.6 c show distinct peaks of maximum volatilization at 240 -250 ° C. It can be calculated that about 55 -68% of added N -acetyl -d -(+) -glucosamine was thermally volatilized up to 300 ° C and 84 -86% up to 400 ° C. This conforms to the visible reduction of peak area in the N K -edge XANES spectra ( Figure 14.6 a,b). Beyer et al (1995) . c Blume and Leinweber (2004) .…”

Section: " Unknown " Organic Nitrogenmentioning

confidence: 99%

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Analytical Pyrolysis and Soft‐Ionization Mass Spectrometry

Leinweber

Jandl

Eckhardt

et al. 2009

Biophysico‐Chemical Processes Involving Natural Nonliving Organic Matter in Environmental Systems

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Section: Nonfractionated Whole Soil Organic Matter: Factors Infl Uencmentioning

confidence: 85%

Section: " Unknown " Organic Nitrogenmentioning

confidence: 99%

Analytical Pyrolysis and Soft‐Ionization Mass Spectrometry

Leinweber

Jandl

Eckhardt

et al. 2009

Biophysico‐Chemical Processes Involving Natural Nonliving Organic Matter in Environmental Systems

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“…White et al (2007) used pyrolysis GC-MS to examine 19 soils collected from a variety of circumpolar regions and found that these soils were carbohydrate rich. Solid-state 13 C NMR characterization studies of soil OM from the Arctic, Antarctic, and northern alpine regions have collectively reported that alkyl and O-alkyl structures dominated the NMR spectra (Beyer et al, 1995(Beyer et al, , 1997(Beyer et al, , 2001Dai et al, 2001Dai et al, , 2002Sjögersten et al, 2003;Pautler et al, 2010;Pedersen et al, 2011). These studies provide the underlying basis for concern since labile OM constituents (i.e., O-alkyl components) are particularly susceptible to climate change.…”

Section: Soil Organic Matter Structural Shifts With Soil Warmingmentioning

confidence: 96%

“…3 Comparison of literature C/N vs. alkyl/O-alkyl ratios derived from solid-state 13 C NMR spectra. Data take from: (Beyer et al, 1995(Beyer et al, , 2001Dai et al, 2001Dai et al, , 2002Sjögersten et al, 2003;Simpson et al, 2008) degradation, the alkyl/O-alkyl ratio increases because labile (O-alkyl) components are preferentially degraded compared to more resistant alkyl components. However, the large variation within the data points suggests that the relationship is not necessarily robust.…”

Section: Peptidesmentioning

confidence: 99%

The Chemical Ecology of Soil Organic Matter Molecular Constituents

Simpson

2012

J Chem Ecol

123

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Soil organic matter (OM) contains vast stores of carbon, and directly supports microbial, plant, and animal life by retaining essential nutrients and water in the soil. Soil OM plays important roles in biological, chemical, and physical processes within the soil, and arguably plays a major role in maintaining long-term ecological stability in a changing world. Despite its importance, there is a great deal still unknown about soil OM chemical ecology. The development of sophisticated analytical methods have reshaped our understanding of soil OM composition, which is now believed to be comprised of plant and microbial products at various stages of decomposition. The methods also have recently been applied to study environmental change in various settings and have provided unique insight with respect to soil OM chemical ecology. The goal of this review is to highlight the methods used to characterize soil OM structure, source, and degradation that have enabled precise observations of OM and associated ecological shifts. Although the chemistry of soil OM is important in its overall fate in ecosystems, the studies conducted to date suggest that ecological function is not defined by soil OM chemistry alone. The long-standing questions regarding soil OM stability and recalcitrance will likely be answered when several molecular methods are used in tandem to closely examine structure, source, age, degradation stage, and interactions of specific OM components in soil.

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“…In the Southern Hemisphere, permafrost and Gelisols occur on the Antarctic continent, on the sub-Antarctic islands, and in mountain areas (Beyer et al, 1999(Beyer et al, , 2000Blume et al, 1997;Bockheim, 1990;Campbell and Claridge, 2004a, b;Simas et al, 2007;Gilichinsky et al, 2010). However, the organic carbon content of permafrost-affected soils in the southern circumpolar region is extremely low when compared to the northern permafrost region (Bockheim, 1990;Claridge and Campbell, 2004), except for some isolated areas affected by maritime climate in coastal Antarctica and sub-Antarctica (Beyer et al, 1995). Hence, the focus of this review is on permafrost soils of the northern permafrost region.…”

Section: Classification Of Permafrost Soilsmentioning

confidence: 99%

Permafrost soils and carbon cycling

Ping

Jastrow

Jorgenson

et al. 2015

SOIL

265

188

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Abstract. Knowledge of soils in the permafrost region has advanced immensely in recent decades, despite the remoteness and inaccessibility of most of the region and the sampling limitations posed by the severe environment. These efforts significantly increased estimates of the amount of organic carbon stored in permafrost-region soils and improved understanding of how pedogenic processes unique to permafrost environments built enormous organic carbon stocks during the Quaternary. This knowledge has also called attention to the importance of permafrost-affected soils to the global carbon cycle and the potential vulnerability of the region's soil organic carbon (SOC) stocks to changing climatic conditions. In this review, we briefly introduce the permafrost characteristics, ice structures, and cryopedogenic processes that shape the development of permafrost-affected soils, and discuss their effects on soil structures and on organic matter distributions within the soil profile. We then examine the quantity of organic carbon stored in permafrost-region soils, as well as the characteristics, intrinsic decomposability, and potential vulnerability of this organic carbon to permafrost thaw under a warming climate. Overall, frozen conditions and cryopedogenic processes, such as cryoturbation, have slowed decomposition and enhanced the sequestration of organic carbon in permafrost-affected soils over millennial timescales. Due to the low temperatures, the organic matter in permafrost soils is often less humified than in more temperate soils, making some portion of this stored organic carbon relatively vulnerable to mineralization upon thawing of permafrost.

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Soil organic matter composition and transformation in gelic histosols of coastal continental antarctica

Cited by 50 publications

References 21 publications

Analytical Pyrolysis and Soft‐Ionization Mass Spectrometry

Analytical Pyrolysis and Soft‐Ionization Mass Spectrometry

The Chemical Ecology of Soil Organic Matter Molecular Constituents

Permafrost soils and carbon cycling

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