Phosphorus dynamics during early soil development in a cold desert: insights from oxygen isotopes in phosphate
<p>At the early stages of pedogenesis, the dynamics of phosphorus (P) in soils are controlled by microbial communities, the physicochemical properties of the soil and the environmental conditions. While various microorganisms involved in carrying out biogeochemical processes have been identifi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-01-01
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| Series: | SOIL |
| Online Access: | https://soil.copernicus.org/articles/8/1/2022/soil-8-1-2022.pdf |
| _version_ | 1798020912586424320 |
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| author | Z. Frkova Z. Frkova C. Pistocchi Y. Vystavna Y. Vystavna K. Capkova K. Capkova J. Dolezal J. Dolezal F. Tamburini |
| author_facet | Z. Frkova Z. Frkova C. Pistocchi Y. Vystavna Y. Vystavna K. Capkova K. Capkova J. Dolezal J. Dolezal F. Tamburini |
| author_sort | Z. Frkova |
| collection | DOAJ |
| description | <p>At the early stages of pedogenesis, the dynamics of phosphorus (P)
in soils are controlled by microbial communities, the physicochemical
properties of the soil and the environmental conditions. While various
microorganisms involved in carrying out biogeochemical processes have been
identified, little is known about the actual contribution of microbial
processes, such as organic P hydrolysis and microbial P turnover, to P
cycling. We thus focused on processes driven by microbes and how they affect
the size and cycling of organic and inorganic soil P pools along a soil
chronosequence in the Chamser Kangri glacier forefield (Western Himalayas).
The rapid retreat of the glacier allowed us to study the early stages of
soil formation under a cold arid climate. Biological P transformations were
studied with the help of the isotopic composition of oxygen (O) in phosphate
(<span class="inline-formula"><i>δ</i><sup>18</sup></span>O<span class="inline-formula"><sub>P</sub>)</span> coupled to sequential P fractionation performed on
soil samples (0–5 cm depth) from four sites of different age spanning 0 to
100–150 years. The P bound to Ca, i.e., 1 M HCl-extractable P,
still represented 95 % of the total P stock after approximately 100 years of soil
development. Its isotopic composition was similar to the parent material at
the most developed site. Primary phosphate minerals, possibly apatite,
mostly comprised this pool. The <span class="inline-formula"><i>δ</i><sup>18</sup></span>O<span class="inline-formula"><sub>P</sub></span> of the available P
and the NaOH-extractable inorganic P instead differed from that of the
parent material, suggesting that these pools underwent biological turnover.
The <span class="inline-formula"><i>δ</i><sup>18</sup></span>O<span class="inline-formula"><sub>P</sub></span> of the available P was mostly controlled by the
microbial P, suggesting fast exchanges occurred between these two pools
possibly fostered by repeated freezing–thawing and drying–rewetting cycles.
The release of P from organic P becomes increasingly important with soil
age, constituting one-third of the P flux to available P at the oldest site.
Accordingly, the lighter isotopic composition of the P bound to Fe and Al
oxides at the oldest site indicated that this pool contained phosphate
released by organic P mineralization. Compared to previous studies on early
pedogenesis under alpine or cold climate, our findings suggest a much slower
decrease of the P-bearing primary minerals during the first 100 years of
soil development under extreme conditions. However, they provide evidence
that, by driving short-term P dynamics, microbes play an important role in
controlling the redistribution of primary P into inorganic and organic soil
P pools.</p> |
| first_indexed | 2024-04-11T17:05:24Z |
| format | Article |
| id | doaj.art-fda989c01a414340911c16ab1e267411 |
| institution | Directory Open Access Journal |
| issn | 2199-3971 2199-398X |
| language | English |
| last_indexed | 2024-04-11T17:05:24Z |
| publishDate | 2022-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | SOIL |
| spelling | doaj.art-fda989c01a414340911c16ab1e2674112022-12-22T04:13:03ZengCopernicus PublicationsSOIL2199-39712199-398X2022-01-01811510.5194/soil-8-1-2022Phosphorus dynamics during early soil development in a cold desert: insights from oxygen isotopes in phosphateZ. Frkova0Z. Frkova1C. Pistocchi2Y. Vystavna3Y. Vystavna4K. Capkova5K. Capkova6J. Dolezal7J. Dolezal8F. Tamburini9University of Luxembourg, Faculty of Science, Technology and Communication, 6, rue Richard Coudenhove-Kalergi, 1359, LuxembourgBiology Centre of the Czech Academy of Sciences, Institute of Hydrobiology, Na Sádkách 7, 370 05 České Budějovice, Czech RepublicEco&Sols, Montpellier SupAgro, CIRAD, INRAE, IRD, 34060 Montpellier, FranceBiology Centre of the Czech Academy of Sciences, Institute of Hydrobiology, Na Sádkách 7, 370 05 České Budějovice, Czech RepublicBiology Centre of the Czech Academy of Sciences, Institute of Soil Biology, Na Sádkách 7, 370 05 České Budějovice, Czech RepublicBiology Centre of the Czech Academy of Sciences, Institute of Hydrobiology, Na Sádkách 7, 370 05 České Budějovice, Czech RepublicCzech Academy of Sciences, Institute of Botany v.v.i., Dukelská 135, 379 82 Třeboň, Czech RepublicCzech Academy of Sciences, Institute of Botany v.v.i., Dukelská 135, 379 82 Třeboň, Czech RepublicFaculty of Science, University of South Bohemia, Na Zlaté stoce 1, 370 05, České Budějovice, Czech RepublicInstitute of Agricultural Sciences, ETH Zurich, Research Station Eschikon 33, 8315 Lindau, Switzerland<p>At the early stages of pedogenesis, the dynamics of phosphorus (P) in soils are controlled by microbial communities, the physicochemical properties of the soil and the environmental conditions. While various microorganisms involved in carrying out biogeochemical processes have been identified, little is known about the actual contribution of microbial processes, such as organic P hydrolysis and microbial P turnover, to P cycling. We thus focused on processes driven by microbes and how they affect the size and cycling of organic and inorganic soil P pools along a soil chronosequence in the Chamser Kangri glacier forefield (Western Himalayas). The rapid retreat of the glacier allowed us to study the early stages of soil formation under a cold arid climate. Biological P transformations were studied with the help of the isotopic composition of oxygen (O) in phosphate (<span class="inline-formula"><i>δ</i><sup>18</sup></span>O<span class="inline-formula"><sub>P</sub>)</span> coupled to sequential P fractionation performed on soil samples (0–5 cm depth) from four sites of different age spanning 0 to 100–150 years. The P bound to Ca, i.e., 1 M HCl-extractable P, still represented 95 % of the total P stock after approximately 100 years of soil development. Its isotopic composition was similar to the parent material at the most developed site. Primary phosphate minerals, possibly apatite, mostly comprised this pool. The <span class="inline-formula"><i>δ</i><sup>18</sup></span>O<span class="inline-formula"><sub>P</sub></span> of the available P and the NaOH-extractable inorganic P instead differed from that of the parent material, suggesting that these pools underwent biological turnover. The <span class="inline-formula"><i>δ</i><sup>18</sup></span>O<span class="inline-formula"><sub>P</sub></span> of the available P was mostly controlled by the microbial P, suggesting fast exchanges occurred between these two pools possibly fostered by repeated freezing–thawing and drying–rewetting cycles. The release of P from organic P becomes increasingly important with soil age, constituting one-third of the P flux to available P at the oldest site. Accordingly, the lighter isotopic composition of the P bound to Fe and Al oxides at the oldest site indicated that this pool contained phosphate released by organic P mineralization. Compared to previous studies on early pedogenesis under alpine or cold climate, our findings suggest a much slower decrease of the P-bearing primary minerals during the first 100 years of soil development under extreme conditions. However, they provide evidence that, by driving short-term P dynamics, microbes play an important role in controlling the redistribution of primary P into inorganic and organic soil P pools.</p>https://soil.copernicus.org/articles/8/1/2022/soil-8-1-2022.pdf |
| spellingShingle | Z. Frkova Z. Frkova C. Pistocchi Y. Vystavna Y. Vystavna K. Capkova K. Capkova J. Dolezal J. Dolezal F. Tamburini Phosphorus dynamics during early soil development in a cold desert: insights from oxygen isotopes in phosphate SOIL |
| title | Phosphorus dynamics during early soil development in a cold desert: insights from oxygen isotopes in phosphate |
| title_full | Phosphorus dynamics during early soil development in a cold desert: insights from oxygen isotopes in phosphate |
| title_fullStr | Phosphorus dynamics during early soil development in a cold desert: insights from oxygen isotopes in phosphate |
| title_full_unstemmed | Phosphorus dynamics during early soil development in a cold desert: insights from oxygen isotopes in phosphate |
| title_short | Phosphorus dynamics during early soil development in a cold desert: insights from oxygen isotopes in phosphate |
| title_sort | phosphorus dynamics during early soil development in a cold desert insights from oxygen isotopes in phosphate |
| url | https://soil.copernicus.org/articles/8/1/2022/soil-8-1-2022.pdf |
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