Phosphate oxygen isotope ratios in vegetated riparian buffer strip soils
Abstract The oxygen isotopic composition of phosphate (δ18OP) in soils and surface water bodies has been used to trace terrestrial P inputs into aquatic ecosystems. However, enhanced biological activity in vegetated riparian buffer strips (VBSs) may lead to an alteration of δ18OP values. The objecti...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-05-01
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| Series: | Vadose Zone Journal |
| Online Access: | https://doi.org/10.1002/vzj2.20193 |
| _version_ | 1811248444776382464 |
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| author | Sara Louise Bauke Ye Wang Sheila M. Saia Carina Popp Federica Tamburini Stefan Paetzold Wulf Amelung Christian von Sperber |
| author_facet | Sara Louise Bauke Ye Wang Sheila M. Saia Carina Popp Federica Tamburini Stefan Paetzold Wulf Amelung Christian von Sperber |
| author_sort | Sara Louise Bauke |
| collection | DOAJ |
| description | Abstract The oxygen isotopic composition of phosphate (δ18OP) in soils and surface water bodies has been used to trace terrestrial P inputs into aquatic ecosystems. However, enhanced biological activity in vegetated riparian buffer strips (VBSs) may lead to an alteration of δ18OP values. The objective of this study was to assess whether enhanced biological cycling of P in VBS soils can be identified using δ18OP values. For this purpose, we sampled temperate grassland soils at various depths along a VBS to grassland transect. Here, we combined sequential P soil extracts with an analysis of δ18OP values. Soil P pool concentrations tended to decrease significantly along the transect from the VBS to the grassland soils; the strength of this relationship varied with P extract, sample depth, and inorganic or organic bonding form. For the δ18OP values of the 1 M HCl‐extractable P we observed a significant negative trend along the VBS to grassland transect, indicating a tendency for accelerated rates of biological cycling of P within the VBS soil profile compared with the upslope soils. We conclude that oxygen isotope‐based assessments of P source contributions to freshwater bodies should consider the enhanced biological turnover of P in VBS soils. |
| first_indexed | 2024-04-12T15:28:07Z |
| format | Article |
| id | doaj.art-80165dd2f1e64ad2b66e518c55a424e5 |
| institution | Directory Open Access Journal |
| issn | 1539-1663 |
| language | English |
| last_indexed | 2024-04-12T15:28:07Z |
| publishDate | 2022-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Vadose Zone Journal |
| spelling | doaj.art-80165dd2f1e64ad2b66e518c55a424e52022-12-22T03:27:12ZengWileyVadose Zone Journal1539-16632022-05-01213n/an/a10.1002/vzj2.20193Phosphate oxygen isotope ratios in vegetated riparian buffer strip soilsSara Louise Bauke0Ye Wang1Sheila M. Saia2Carina Popp3Federica Tamburini4Stefan Paetzold5Wulf Amelung6Christian von Sperber7Institute of Crop Science and Resource Conservation (INRES) – Soil Science and Soil Ecology Univ. of Bonn Nussallee 13 Bonn 53115 GermanyInstitute of Crop Science and Resource Conservation (INRES) – Soil Science and Soil Ecology Univ. of Bonn Nussallee 13 Bonn 53115 GermanyState Climate Office of North Carolina North Carolina State Univ. 1005 Capability Drive Raleigh NC 27695 USAInstitute of Crop Science and Resource Conservation (INRES) – Soil Science and Soil Ecology Univ. of Bonn Nussallee 13 Bonn 53115 GermanyInstitute of Agricultural Sciences ETH Zürich Lindau 8315 SwitzerlandInstitute of Crop Science and Resource Conservation (INRES) – Soil Science and Soil Ecology Univ. of Bonn Nussallee 13 Bonn 53115 GermanyInstitute of Crop Science and Resource Conservation (INRES) – Soil Science and Soil Ecology Univ. of Bonn Nussallee 13 Bonn 53115 GermanyInstitute of Crop Science and Resource Conservation (INRES) – Soil Science and Soil Ecology Univ. of Bonn Nussallee 13 Bonn 53115 GermanyAbstract The oxygen isotopic composition of phosphate (δ18OP) in soils and surface water bodies has been used to trace terrestrial P inputs into aquatic ecosystems. However, enhanced biological activity in vegetated riparian buffer strips (VBSs) may lead to an alteration of δ18OP values. The objective of this study was to assess whether enhanced biological cycling of P in VBS soils can be identified using δ18OP values. For this purpose, we sampled temperate grassland soils at various depths along a VBS to grassland transect. Here, we combined sequential P soil extracts with an analysis of δ18OP values. Soil P pool concentrations tended to decrease significantly along the transect from the VBS to the grassland soils; the strength of this relationship varied with P extract, sample depth, and inorganic or organic bonding form. For the δ18OP values of the 1 M HCl‐extractable P we observed a significant negative trend along the VBS to grassland transect, indicating a tendency for accelerated rates of biological cycling of P within the VBS soil profile compared with the upslope soils. We conclude that oxygen isotope‐based assessments of P source contributions to freshwater bodies should consider the enhanced biological turnover of P in VBS soils.https://doi.org/10.1002/vzj2.20193 |
| spellingShingle | Sara Louise Bauke Ye Wang Sheila M. Saia Carina Popp Federica Tamburini Stefan Paetzold Wulf Amelung Christian von Sperber Phosphate oxygen isotope ratios in vegetated riparian buffer strip soils Vadose Zone Journal |
| title | Phosphate oxygen isotope ratios in vegetated riparian buffer strip soils |
| title_full | Phosphate oxygen isotope ratios in vegetated riparian buffer strip soils |
| title_fullStr | Phosphate oxygen isotope ratios in vegetated riparian buffer strip soils |
| title_full_unstemmed | Phosphate oxygen isotope ratios in vegetated riparian buffer strip soils |
| title_short | Phosphate oxygen isotope ratios in vegetated riparian buffer strip soils |
| title_sort | phosphate oxygen isotope ratios in vegetated riparian buffer strip soils |
| url | https://doi.org/10.1002/vzj2.20193 |
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