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Berens M, Michaud AB, VanderJeugdt E, Miah I, Sutor FW, Emerson D, Bowden WB, Kinsman-Costello L, Weintraub MN, Herndon EM. Phosphorus Interactions with Iron in Undisturbed and Disturbed Arctic Tundra Ecosystems. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:11400-11410. [PMID: 38889135 PMCID: PMC11223478 DOI: 10.1021/acs.est.3c09072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 05/28/2024] [Accepted: 05/29/2024] [Indexed: 06/20/2024]
Abstract
Phosphorus (P) limitation often constrains biological processes in Arctic tundra ecosystems. Although adsorption to soil minerals may limit P bioavailability and export from soils into aquatic systems, the contribution of mineral phases to P retention in Arctic tundra is poorly understood. Our objective was to use X-ray absorption spectroscopy to characterize P speciation and associations with soil minerals along hillslope toposequences and in undisturbed and disturbed low-lying wet sedge tundra on the North Slope, AK. Biogenic mats comprised of short-range ordered iron (Fe) oxyhydroxides were prevalent in undisturbed wet sedge meadows. Upland soils and pond sediments impacted by gravel mining or thermokarst lacked biogenic Fe mats and were comparatively iron poor. Phosphorus was primarily contained in organic compounds in hillslope soils but associated with Fe(III) oxyhydroxides in undisturbed wet sedge meadows and calcium (Ca) in disturbed pond sediments. We infer that phosphate mobilized through organic decomposition binds to Fe(III) oxyhydroxides in wet sedge, but these associations are disrupted by physical disturbance that removes Fe mats. Increasing disturbances of the Arctic tundra may continue to alter the mineralogical composition of soils at terrestrial-aquatic interfaces and binding mechanisms that could inhibit or promote transport of bioavailable P from soils to aquatic ecosystems.
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Affiliation(s)
- Matthew
John Berens
- Environmental
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Alexander Bryce Michaud
- School
of Earth Sciences, Ohio State University, Columbus, Ohio 43210, United States
- Byrd
Polar and Climate Research Center, Ohio
State University, Columbus, Ohio 43210, United States
- Bigelow
Laboratory for Ocean Sciences, East Boothbay, Maine 02543, United States
| | - Erin VanderJeugdt
- Department
of Biological Sciences, Kent State University, Kent, Ohio 44240, United States
| | - Imtiaz Miah
- Department
of Environmental Sciences, University of
Toledo, Toledo, Ohio 43606, United States
- Department
of Agricultural Chemistry, Sylhet Agricultural
University, Sylhet 3100, Bangladesh
| | - Frederick W. Sutor
- Rubenstein
School of Environment and Natural Resources, University of Vermont, Burlington, Vermont 05405, United States
| | - David Emerson
- School
of Earth Sciences, Ohio State University, Columbus, Ohio 43210, United States
| | - William B. Bowden
- Rubenstein
School of Environment and Natural Resources, University of Vermont, Burlington, Vermont 05405, United States
| | | | - Michael N. Weintraub
- Department
of Environmental Sciences, University of
Toledo, Toledo, Ohio 43606, United States
| | - Elizabeth M. Herndon
- Environmental
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department
of Earth and Planetary Sciences, University
of Tennessee, Knoxville, Tennessee 37996, United States
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Michaud AB, Massé RO, Emerson D. Microbial iron cycling is prevalent in water-logged Alaskan Arctic tundra habitats, but sensitive to disturbance. FEMS Microbiol Ecol 2023; 99:7022315. [PMID: 36725207 DOI: 10.1093/femsec/fiad013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/23/2023] [Accepted: 01/31/2023] [Indexed: 02/03/2023] Open
Abstract
Water logged habitats in continuous permafrost regions provide extensive oxic-anoxic interface habitats for iron cycling. The iron cycle interacts with the methane and phosphorus cycles, and is an important part of tundra biogeochemistry. Our objective was to characterize microbial communities associated with the iron cycle within natural and disturbed habitats of the Alaskan Arctic tundra. We sampled aquatic habitats within natural, undisturbed and anthropogenically disturbed areas and sequenced the 16S rRNA gene to describe the microbial communities, then supported these results with process rate and geochemical measurements. Undisturbed habitats have microbial communities that are significantly different than disturbed habitats. Microbial taxa known to participate in the iron and methane cycles are significantly associated with natural habitats, whereas they are not significantly associated with disturbed sites. Undisturbed habitats have significantly higher extractable iron and are more acidic than disturbed habitats sampled. Iron reduction is not measurable in disturbed aquatic habitats and is not stimulated by the addition of biogenic iron mats. Our study highlights the prevalence of Fe-cycling in undisturbed water-logged habitats, and demonstrates that anthropogenic disturbance of the tundra, due to legacy gravel mining, alters the microbiology of aquatic habitats and disrupts important biogeochemical cycles in the Arctic tundra.
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Affiliation(s)
- Alexander B Michaud
- Bigelow Laboratory for Ocean Sciences, East Boothbay, ME 04544, United States
| | - Rémi O Massé
- Bigelow Laboratory for Ocean Sciences, East Boothbay, ME 04544, United States
| | - David Emerson
- Bigelow Laboratory for Ocean Sciences, East Boothbay, ME 04544, United States
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Vigliaturo R, Jamnik M, Dražić G, Podobnik M, Žnidarič MT, Ventura GD, Redhammer GJ, Žnidaršič N, Caserman S, Gieré R. Nanoscale transformations of amphiboles within human alveolar epithelial cells. Sci Rep 2022; 12:1782. [PMID: 35110621 PMCID: PMC8810849 DOI: 10.1038/s41598-022-05802-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 12/15/2021] [Indexed: 12/24/2022] Open
Abstract
Amphibole asbestos is related to lung fibrosis and several types of lung tumors. The disease-triggering mechanisms still challenge our diagnostic capabilities and are still far from being fully understood. The literature focuses primarily on the role and formation of asbestos bodies in lung tissues, but there is a distinct lack of studies on amphibole particles that have been internalized by alveolar epithelial cells (AECs). These internalized particles may directly interact with the cell nucleus and the organelles, exerting a synergistic action with asbestos bodies (AB) from a different location. Here we document the near-atomic- to nano-scale transformations induced by, and taking place within, AECs of three distinct amphiboles (anthophyllite, grunerite, “amosite”) with different Fe-content and morphologic features. We show that: (i) an Fe-rich layer is formed on the internalized particles, (ii) particle grain boundaries are transformed abiotically by the internal chemical environment of AECs and/or by a biologically induced mineralization mechanism, (iii) the Fe-rich material produced on the particle surface does not contain large amounts of P, in stark contrast to extracellular ABs, and (iv) the iron in the Fe-rich layer is derived from the particle itself. Internalized particles and ABs follow two distinct formation mechanisms reaching different physicochemical end-states.
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Affiliation(s)
- Ruggero Vigliaturo
- Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, USA.
| | - Maja Jamnik
- Department of Molecular Biology and Nanobiotechnology, National Institute of Chemistry, Ljubljana, Slovenia
| | - Goran Dražić
- Department of Materials Chemistry, National Institute of Chemistry, Ljubljana, Slovenia
| | - Marjetka Podobnik
- Department of Molecular Biology and Nanobiotechnology, National Institute of Chemistry, Ljubljana, Slovenia
| | - Magda Tušek Žnidarič
- Department of Biotechnology and System Biology, National Institute of Biology, Ljubljana, Slovenia
| | - Giancarlo Della Ventura
- Department of Geological Sciences, University of Roma Tre, Rome, Italy.,INFN-Istituto Nazionale Di Fisica Nucleare, Frascati (Rome), Rome, Italy.,INGV, Via di Vigna Murata 605, 00143, Rome, Italy
| | - Günther J Redhammer
- Department of Materials Science and Physics, University of Salzburg, 5020, Salzburg, Austria
| | - Nada Žnidaršič
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Simon Caserman
- Department of Molecular Biology and Nanobiotechnology, National Institute of Chemistry, Ljubljana, Slovenia
| | - Reto Gieré
- Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, USA.,Center of Excellence in Environmental Toxicology, University of Pennsylvania, Philadelphia, USA
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