Böden der Welt

Zech, Wolfgang; Schád, Péter; Hintermaier-Erhard, Gerd

doi:10.1007/978-3-642-36575-1

Cited by 49 publications

(27 citation statements)

References 6 publications

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“…Weak own swelling of such microgels in acidic aqueous medium (Table 2) does not allow the absorption of water in capillary region of water retention (pF≤2–3), the most important for irrigation. Such microgels can be effective, perhaps, only for a very limited class of coarse‐textured soils with a positive surface charge and an alkaline reaction of the liquid phase, for example, some Andosols, 37 but this hypothesis is not obvious and requires a separate experimental verification.…”

Section: Resultsmentioning

confidence: 99%

Water retention in sandy substrates modified by cross‐linked polymeric microgels and their complexes with a linear cationic polymer

Smagin

Панова

Ilyasov

et al. 2021

J of Applied Polymer Sci

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New synthetic soil conditioners for anti‐erosion protection of soils in the form of microgel copolymers of N‐isopropylacrylamide and acrylic acid (PAA#) and their interpolyelectrolyte complexes (IPEC#) with different surface charges are tested for optimization of water retention and porous structure in two samples of soil substrates. Water retention curves (WRCs) are used as a fundamental thermodynamic indicator of water holding capacity in soil substrates treated by new polymeric materials. Soil‐hydrological constants, as well as specific surface parameters and pore distribution curves are calculated from the WRCs using the van Genuhten model and the Voronin method in the author's modification. PAA# and anionic IPEC# with high swelling degree at a dose of 1% (by weight) increase field water capacity, available soil water range and specific surface area by 5–6 times for quartz sand, along with reorganizing its structure towards micropore dominance. For loamy sand, the same treatment was less effective with a twofold increase in field moisture capacity, double or triple increase of specific surface area, and an almost constant range of available soil water due to the strong increase of wilting point parameter. Weakly swelling linear polyacrylic acid and cationic IPEC# did not significantly affect properties of both mineral substrates.

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Section: Resultsmentioning

confidence: 99%

Water retention in sandy substrates modified by cross‐linked polymeric microgels and their complexes with a linear cationic polymer

Smagin

Панова

Ilyasov

et al. 2021

J of Applied Polymer Sci

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“…5). Such high ratios also in the subsoils are typical for podzols (Zech et al, 2014) or charcoal-rich Anthrosols (Glaser et al, 2001;Glaser and Birk, 2012). Apart from the one outlier in the LL of profile 1.1 G5W (37.2), the highest TOC / N ratios are observed in the OAh3 horizon (ranging from 27.7 to 33.8).…”

Section: Toc Toc / N δ 13 C δ 15 N and Bc Contents Of Soil Profiles On The Ullafelsenmentioning

confidence: 86%

Revisiting the subalpine Mesolithic site Ullafelsen in the Fotsch Valley, Stubai Alps, Austria – new insights into pedogenesis and landscape evolution from leaf-wax-derived <i>n</i>-alkanes, black carbon and radiocarbon dating

Zech

Lerch

Bliedtner

et al. 2021

E&G Quaternary Sci. J.

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Abstract. Archaeological research in high mountain regions has gotten a lot more attention since the discovery of the copper age mummy called “Ötzi” in the Ötztaler Alps in 1991. In the Tyrolean Stubai Alps, the Mesolithic site Ullafelsen at 1869 m a.s.l. (above sea level) close to the recent upper timberline in the Fotsch Valley represents, on the one hand, a very important archaeological reference site and offers, on the other hand, intriguing research questions related to, amongst others, pedogenesis. Given that no biomarkers and stable isotopes have been hitherto investigated, we aimed at contributing with respective analyses and additional radiocarbon dating to a better understanding of the landscape evolution and pedogenesis on and around the Ullafelsen. Our results for modern vegetation suggest that leaf-wax-derived n-alkanes allow us to chemotaxonomically distinguish between subalpine deciduous trees (nC27 predominance) versus (sub)alpine grasses, herbs and dwarf shrubs (nC29, nC31 and/or nC33 predominance). Except for Juniperus, conifers produce no or extremely low n-alkane contents. Although no clear vegetation changes could be inferred from the n-alkane patterns of the investigated soil profiles, the total n-alkane content (TAC) was developed for the first time as an unambiguous proxy for distinguishing between buried (= fossil) topsoils (2Ahb horizons) and humus-enriched subsoils such as Bh horizons of podzols. Based on this leaf wax proxy, we can rule out that the 2Ahb?/Bh? horizons under question on the Ullafelsen are buried topsoils as suggested previously. Dating of the H2O2-pretreated soil samples yielded 14C ages for the podzol Bh horizons ranging from 6.7 to 5.4 cal kyr BP. This is clearly younger than the overlying Mesolithic living floor (LL) (10.9 to 9.5 cal kyr BP) but pre-dates the assumed intensification of alpine pasturing from the Bronze Age onwards. Both the LL and the directly overlying OAh3 horizon yielded black carbon maxima and benzene polycarboxylic acid patterns reflecting fire-induced human impact during the Mesolithic. The discrepancy between the Mesolithic charcoal 14C ages (ages of ≥ 9.5 cal kyr BP) versus the 14C ages obtained for bulk n-alkanes ranging from 8.2 to 4.9 cal kyr BP suggests that non-alkane-producing conifers predominated the vegetation on and around the Ullafelsen after the Mesolithic occupation. Only with the anthropo-zoological lowering of the timberline associated with alpine pasturing since the Neolithic and especially the Bronze Age has an n-alkane-producing vegetation cover (grasses, herbs or dwarf shrubs) started to predominate.

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“…Several cases, most notably in regions with considerable mediterranean influences, demonstrate that the grassland component is in fact a dry grassland with short grasses, and limited number and cover of forbs. Tragacanthic species are typical, especially in the mountains of the Middle East (Akhani, ; Zohary, ). Generally, the steppe component of forest‐steppes frequently grows on chernozem soils, and the forest component on grey forest soil (Knapp, ; Rychnovská, ; Zamotaev, ; Zech, Schad & Hintermaier‐Erhard, ). Different chernozem varieties may also occur under forest patches (Berg, ; Wallis de Vries, Manibazar & Dügerlham, ).…”

Section: Defining Forest‐steppesmentioning

confidence: 99%

The edge of two worlds: A new review and synthesis on Eurasian forest‐steppes

Erdős

Ambarlı

Anenkhonov

et al. 2018

Applied Vegetation Science

154

145

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Aims: Eurasian forest-steppes are among the most complex non-tropical terrestrial ecosystems. Despite their considerable scientific, ecological and economic importance, knowledge of forest-steppes is limited, particularly at the continental scale.Here we provide an overview of Eurasian forest-steppes across the entire zone: (a) we propose an up-to-date definition of forest-steppes, (b) give a short physiogeographic outline, (c) delineate and briefly characterize the main forest-steppe regions, (d) explore forest-steppe biodiversity and conservation status, and (e) outline foreststeppe prospects under predicted climate change. Location: Eurasia (29°-56°N, 16°-139°E). Results and Conclusions: Forest-steppes are natural or near-natural vegetation complexes of arboreal and herbaceous components (typically distributed in a mosaic pattern) in the temperate zone, where the co-existence of forest and grassland is enabled primarily by the semi-humid to semi-arid climate, complemented by complex interactions of biotic and abiotic factors operating at multiple scales. This new definition includes lowland forest-grassland macromosaics (e.g. in Eastern Europe), exposurerelated mountain forest-steppes (e.g. in Inner Asia), fine-scale forest-grassland This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Böden der Welt

Cited by 49 publications

References 6 publications

Water retention in sandy substrates modified by cross‐linked polymeric microgels and their complexes with a linear cationic polymer

Water retention in sandy substrates modified by cross‐linked polymeric microgels and their complexes with a linear cationic polymer

Revisiting the subalpine Mesolithic site Ullafelsen in the Fotsch Valley, Stubai Alps, Austria – new insights into pedogenesis and landscape evolution from leaf-wax-derived <i>n</i>-alkanes, black carbon and radiocarbon dating

The edge of two worlds: A new review and synthesis on Eurasian forest‐steppes

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Böden der Welt

Cited by 49 publications

References 6 publications

Water retention in sandy substrates modified by cross‐linked polymeric microgels and their complexes with a linear cationic polymer

Water retention in sandy substrates modified by cross‐linked polymeric microgels and their complexes with a linear cationic polymer

Revisiting the subalpine Mesolithic site Ullafelsen in the Fotsch Valley, Stubai Alps, Austria – new insights into pedogenesis and landscape evolution from leaf-wax-derived &lt;i&gt;n&lt;/i&gt;-alkanes, black carbon and radiocarbon dating

The edge of two worlds: A new review and synthesis on Eurasian forest‐steppes

Contact Info

Product

Resources

About

Revisiting the subalpine Mesolithic site Ullafelsen in the Fotsch Valley, Stubai Alps, Austria – new insights into pedogenesis and landscape evolution from leaf-wax-derived <i>n</i>-alkanes, black carbon and radiocarbon dating