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MANGANESE UPTAKE IN RED MAPLE TREES IN RESPONSE TO MINERAL DISSOLUTION RATES IN SOIL

Laubscher, Sydney
http://rave.ohiolink.edu/etdc/view?acc_num=kent1574431912056187

Abstract Details

2019, MS, Kent State University, College of Arts and Sciences / Department of Earth Sciences.
Manganese (Mn), an essential nutrient critical for photosynthesis in plants but a toxic element in excess, impacts the fate and transport of other nutrients and toxins, forest metabolism, carbon storage, and ecosystem productivity. Given the significant role Mn can play in ecosystems, it is important to understand how soil geochemistry controls Mn uptake by vegetation. The purpose of this research was to explore how Mn uptake by plants is related to Mn supply to plants through mineral dissolution. We conducted a greenhouse pot experiment to quantify Mn uptake by plants based on controlled geochemical constraints. Specifically, we investigated whether Mn uptake was limited by the supply of Mn to soil solution or by biological controls within the plants. Greenhouse soil pots (quartz sand + peat) that were non-vegetated or vegetated with red maple saplings were supplied with either no added Mn, dissolved Mn, Mn oxides, or crushed shale containing Mn-bearing pyrite. We analyzed the chemical composition of plant tissue to quantify Mn uptake and soil leachate to quantify Mn losses. From these values, we constructed a mass balance model and calculated pseudo-first order rate constants to compare Mn mobilization between treatments. Mn uptake was higher in systems with dissolved Mn because it was not limited by mineral weathering. Mn uptake was also higher in systems supplied with fast-weathering substrates (pyrite in the shale) than slow-weathering substrates (Mn oxides). There were not significant differences in Mn leaching and total Mn loss between vegetated and non-vegetated pots in the Mn-oxide or shale treatments. We conclude that Mn uptake is controlled by dissolution rates of Mn-minerals in soil.
Elizabeth Herndon (Advisor)
David Singer (Committee Member)
Chris Blackwood (Committee Member)
132 p.
Biogeochemistry; Environmental Geology; Environmental Science; Environmental Studies; Geobiology; Geochemistry; Geology
manganese; dissolution rates; kinetics; plant uptake; manganese uptake; manganese leaching; leaching; mass balance model; greenhouse experiment; red maple trees; rate constant; manganese minerals; manganese oxides; dissolved manganese; shale dissolution

Recommended Citations

Citations

  • Laubscher, S. (2019). MANGANESE UPTAKE IN RED MAPLE TREES IN RESPONSE TO MINERAL DISSOLUTION RATES IN SOIL [Master's thesis, Kent State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=kent1574431912056187

    APA Style (7th edition)

  • Laubscher, Sydney. MANGANESE UPTAKE IN RED MAPLE TREES IN RESPONSE TO MINERAL DISSOLUTION RATES IN SOIL. 2019. Kent State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=kent1574431912056187.

    MLA Style (8th edition)

  • Laubscher, Sydney. "MANGANESE UPTAKE IN RED MAPLE TREES IN RESPONSE TO MINERAL DISSOLUTION RATES IN SOIL." Master's thesis, Kent State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=kent1574431912056187

    Chicago Manual of Style (17th edition)

kent1574431912056187
210
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This open access ETD is published by Kent State University and OhioLINK.