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You searched for: Journal name Biogeochemistry Remove constraint Journal name: Biogeochemistry Subject term X-radiation Remove constraint Subject term: X-radiation
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1. Biological chlorine cycling in the Arctic Coastal Plain

Author:
Jaime E. Zlamal; Theodore K. Raab; Mark Little; Robert A. Edwards; David A. Lipson
Source:
Biogeochemistry 2017 v.134 no.3 pp. 243-260
ISSN:
0168-2563
Subject:
Dehalococcoides; X-radiation; absorption; biogeochemistry; chlorine; chronosequences; coastal plains; dechlorination; ecosystems; genes; metagenomics; nucleotide sequences; organic matter; plant tissues; ribosomal RNA; spectroscopy; tundra; tundra soils; watersheds; Arctic region
Abstract:
... This study explores biological chlorine cycling in coastal Arctic wet tundra soils. While many previous chlorine-cycling studies have focused on contaminated environments, it is now recognized that chlorine can cycle naturally between inorganic and organic forms in soils. However, these pathways have not previously been described for an Arctic ecosystem. We measured soil organic and inorganic Cl p ...
DOI:
10.1007/s10533-017-0359-0

2. Calcium carbonate in termite galleries - biomineralization or upward transport

Author:
Liu, X.; Monger, H. C.; Whitford, W. G.
Source:
Biogeochemistry 2007 v.82 no.3 pp. 241-250
ISSN:
0168-2563
Subject:
C3 plants; C4 plants; Isoptera; X-radiation; X-ray diffraction; biomineralization; calcite; calcium carbonate; carbon; carbon dioxide; carbon sequestration; digestive system; methane production; opal; organic matter; scanning electron microscopy; semiarid soils; stable isotopes
Abstract:
... Termites and soil calcium carbonate are major factors in the global carbon cycle: termites by their role in decomposition of organic matter and methane production, and soil calcium carbonate by its storage of atmospheric carbon dioxide. In arid and semiarid soils, these two factors potentially come together by means of biomineralization of calcium carbonate by termites. In this study, we evaluated ...
DOI:
10.1007/s10533-006-9067-x

3. Dynamic role of “illite-like” clay minerals in temperate soils: facts and hypotheses

Author:
Barré, P.; Velde, B.; Abbadie, L.
Source:
Biogeochemistry 2007 v.82 no.1 pp. 77-88
ISSN:
0168-2563
Subject:
X-radiation; biogeochemistry; clay soils; ecosystems; exchangeable potassium; forests; grasslands; illite; intensive cropping; plant growth; potassium; soil profiles; temperate soils; temperate zones; temporal variation; topsoil
Abstract:
... Analysis of new data and reinterpretation of published information for clay minerals found in temperate climate soil profiles indicates that there is often a gradient of “illite-like” clay minerals with depth. We used the term “illite-like” because these observations are based on X-Ray Diffractogram patterns and not on layer charge measurements which allow to define properly illite. It appears tha ...
DOI:
10.1007/s10533-006-9054-2

4. Organic matter stabilization in soil microaggregates: implications from spatial heterogeneity of organic carbon contents and carbon forms

Author:
Lehmann, Johannes; Kinyangi, James; Solomon, Dawit
Source:
Biogeochemistry 2007 v.85 no.1 pp. 45-57
ISSN:
0168-2563
Subject:
Fourier transform infrared spectroscopy; Inceptisols; Oxisols; X-radiation; absorption; adsorption; biogeochemistry; carbon; clay; coatings; correlation; kaolinite; metabolites; microaggregates; models; organic matter; polysaccharides; soil stabilization; spectral analysis
Abstract:
... This study investigates the spatial distribution of organic carbon (C) in free stable microaggregates (20-250 μm; not encapsulated within macroaggregates) from one Inceptisol and two Oxisols in relation to current theories of the mechanisms of their formation. Two-dimensional micro- and nano-scale observations using synchrotron-based Fourier-transform infrared (FTIR) and near-edge X-ray absorption ...
DOI:
10.1007/s10533-007-9105-3

5. Spectroscopic (XANES/XRF) characterization of contaminant manganese cycling in a temperate watershed

Author:
Elizabeth M. Herndon; Carmen E. Martínez; Susan L. Brantley
Source:
Biogeochemistry 2014 v.121 no.3 pp. 505-517
ISSN:
0168-2563
Subject:
X-radiation; absorption; anthropogenic activities; atmospheric deposition; atmospheric precipitation; fluorescence; leaves; manganese; mineral soils; organic matter; oxidation; rivers; roots; shale; spectroscopy; stems; toxicity; vegetation; watersheds; Pennsylvania
Abstract:
... Many soils around the globe are contaminated with metals due to inputs from anthropogenic activities; however, the long-term processes that retain these metals in soils or flush them into river systems remain unclear. Soils at the Susquehanna/Shale Hills Critical Zone Observatory, a headwater catchment in central Pennsylvania, USA, are enriched in manganese due to past atmospheric deposition from ...
DOI:
10.1007/s10533-014-0018-7

6. Sulfur dynamics during long-term ecosystem development

Author:
Benjamin L. Turner; Leo M. Condron; Christine A. M. France; Johannes Lehmann; Dawit Solomon; Duane A. Peltzer; Sarah J. Richardson
Source:
Biogeochemistry 2016 v.128 no.3 pp. 281-305
ISSN:
0168-2563
Subject:
X-radiation; X-ray absorption spectroscopy; absorption; age of soil; arylsulfatase; atmospheric deposition; biogeochemistry; carbon; chronosequences; leaves; nitrogen; nutrients; organic horizons; oxidation; phosphorus; soil formation; soil organic matter; stable isotopes; sulfates; sulfur; New Zealand
Abstract:
... Long-term soil and ecosystem development involves predictable changes in nitrogen (N) and phosphorus (P) availability and limitation, but far less is known about comparable changes in sulfur (S) despite its importance as an essential plant macronutrient and component of soil organic matter. We used a combination of elemental analysis, X-ray absorption spectroscopy, hydrolytic enzyme assays, and st ...
DOI:
10.1007/s10533-016-0208-6

7. The effect of a shift from macrophyte to phytoplankton dominance on phosphorus forms and burial in the sediments of a shallow hard-water lake

Author:
Anna-Marie Klamt; Sabine Hilt; Matthias Moros; Helge W. Arz; Michael Hupfer
Source:
Biogeochemistry 2019 v.143 no.3 pp. 371-385
ISSN:
0168-2563
Subject:
X-radiation; calcium; cesium; color; eutrophication; fluorescence; lakes; lead; macrophytes; mercury; phosphorus; phytoplankton; pollution load; radionuclides; sediments; total nitrogen; total organic carbon; water hardness; Germany
Abstract:
... In shallow lakes, increasing phosphorus (P) loading has often been accompanied by a shift from a clear-water, macrophyte-dominated state to a turbid state featuring phytoplankton dominance. The effect of a regime shift on P burial and P fractions in lake sediments, however, is poorly understood. We used sediment cores from a eutrophic hard-water lake (Lake Gollinsee, Germany) that had undergone a ...
DOI:
10.1007/s10533-019-00567-4