Have Sustained Acidic Deposition Decreases Led to Increased Calcium Availability in Recovering Watersheds of the Adirondack Region of New York, USA?

Lawrence, Gregory B.; Siemion, Jason; Antidormi, Michael R.; Bonville, Donald B.; McHale, Michael R.

doi:10.3390/soilsystems5010006

Cited by 19 publications

(10 citation statements)

References 59 publications

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“…Similar to our study, they suggest a mixed response with trends in the forest floor and mineral soil in opposite directions. In the Adirondack Mountains of New York, Lawrence et al [35] found small changes consistent with recovery (1997-2017) including a small but significant increase in B horizon exchangeable Ca; their results in the Oa horizon were mixed, with some sites recovering and others continuing to show decreases in Ca.…”

Section: Comparison With Other Studiesmentioning

confidence: 95%

Forest Soil Cation Dynamics and Increases in Carbon on the Allegheny Plateau, PA, USA Following a Period of Strongly Declining Acid Deposition

2021

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Reductions in exchangeable calcium and magnesium and increase in exchangeable aluminum concentrations have been shown in soils impacted by acid deposition, including at four sites on the Allegheny Plateau, PA, USA, sampled in 1967 and 1997 during a period of peak deposition. We repeated sampling at these sites in 2017 to evaluate changes in soils during the more recent period when there has been a strong decline in acid deposition. The uppermost horizons, including the Oa and A horizons where humified organic matter transitions to mineral soil, were thicker, had higher concentrations of organic carbon and exchangeable calcium and magnesium, and lower concentrations of exchangeable aluminum in 2017 compared to 1997, approximating values measured in 1967. Below the Oa/A horizons, 2017 soil chemistry was more similar to the 1997 results, with some reduction of Ca in the recent measurements. These results suggest recovery of base cation–aluminum balance in surface horizons and may indicate a reduction of aluminum mobilization and increased efficiency of vegetation recycling of nutrients with decreased acid anion concentrations. These changes are consistent with a partial recovery from acid deposition. However, the increase in humified soil organic matter may also be affected by coincident increases in temperature and soil moisture.

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Section: Comparison With Other Studiesmentioning

confidence: 95%

Forest Soil Cation Dynamics and Increases in Carbon on the Allegheny Plateau, PA, USA Following a Period of Strongly Declining Acid Deposition

2021

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“…In our study foliar Ca and Mg continued to increase over 30 years in both sugar maple and black cherry foliage. With substantial decreases in acidic deposition in northeastern North America, a few areas are showing modest increases in Ca and/or Mg in organic horizons and soils, indicative of recovery from acidic deposition (Bailey et al 2021;Lawrence et al 2021). Lime application could accelerate recovery in some circumstances (Lawrence et al 2016).…”

Section: Liming and Forest Managementmentioning

confidence: 99%

Thirty-year effects of liming on soil and foliage chemistry and growth of northern hardwoods in Pennsylvania, USA

et al. 2022

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The longevity of a single 22.4 Mg ha-1 application of dolomitic limestone at four northern hardwood stands was evaluated over thirty years (1986-2016) to determine whether changes in soils, foliage, and tree growth were sustained on the unglaciated Allegheny Plateau in northern Pennsylvania, USA. In limed plots, soils, sampled to 45-55 cm depth, and sugar maple (Acer saccharum Marsh.) and black cherry (Prunus serotina Ehrh.) foliage had significantly ( P ≤ 0.05) greater concentrations of calcium (Ca) and magnesium (Mg) through 2016 compared with samples from unlimed plots. Calcium and Mg capitals (g m-2) in the Oi through A horizon combined were greater on limed plots than unlimed plots, largely due to increases in the thickness and nutrient concentration in the A horizon. Over 30-years, sugar maple basal area increment (cm2 yr-1 BAINC) ) was greater in limed plots, American beech (Fagus grandifolia Ehrh.) BAINC was unaffected, and black cherry BAINC was reduced in limed plots compared with unlimed plots. The sustained effect of this one-time lime treatment shows the strong role of efficient nutrient cycling in forests and suggests that the benefits over a substantial portion of a stand rotation may increase the feasibility of operational liming.

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“…Changes to microbially mediated ecosystem functions like C‐cycling may be immediate, transient, or emerge over longer time scales (Schimel & Schaeffer, 2012). We compared the long‐term (25‐year) effects of liming on microbial composition at Woods Lake (Driscoll et al, 1996) with short‐term (2‐year) responses at another watershed‐scale experiment located 38 km away at Honnedaga Lake (Lawrence, 2020). Both sites had similar soil properties, forest composition and liming‐driven increases in soil pH (~1 unit).…”

Section: Introductionmentioning

confidence: 99%

Watershed‐scale liming reveals the short‐ and long‐term effects ofpHon the forest soil microbiome and carbon cycling

Sridhar

Lawrence

Debenport

et al. 2022

Environmental Microbiology

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Soil microbial community composition routinely correlates with pH, reflecting both direct pH effects on microbial physiology and long-term biogeochemical feedbacks. We used two watershed-scale liming experiments to identify short-(2 years) and long-term (25 years) changes in the structure and function of bacterial and fungal communities in organic horizons (O e and O a ) of acid forest soils. Liming increased soil pH, extractable calcium, and soil carbon stocks, reduced biomass-specific respiration, and caused major changes in the soil microbiome in the short and long term. More taxa responded to liming in the short term (70%) than in the long term (30%), with most showing consistent directional responses at both sites. The ratio of change in relative abundance between limed and reference sites was twofold higher at the long than the short-term site, indicating that the effects of liming grew over time. Liming impacts were most pronounced in fungi, as steep declines of dominant ectomycorrhizal fungi (Cenococcum and Russula) occurred at both sites. Liming favoured neutrophilic bacteria over acidophilic populations according to estimated environmental pH optima. Collectively, these results demonstrate that a liming-induced change of one pH unit has an immediate and persistent effect on the structure and function of microbial communities in acid forest soils. The corresponding suppression of respiration indicates that anthropogenic alterations of soil pH, as driven by acid deposition or liming, can affect forest floor C stocks due to pH-driven shifts in community structure.

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Have Sustained Acidic Deposition Decreases Led to Increased Calcium Availability in Recovering Watersheds of the Adirondack Region of New York, USA?

Cited by 19 publications

References 59 publications

Forest Soil Cation Dynamics and Increases in Carbon on the Allegheny Plateau, PA, USA Following a Period of Strongly Declining Acid Deposition

Forest Soil Cation Dynamics and Increases in Carbon on the Allegheny Plateau, PA, USA Following a Period of Strongly Declining Acid Deposition

Thirty-year effects of liming on soil and foliage chemistry and growth of northern hardwoods in Pennsylvania, USA

Watershed‐scale liming reveals the short‐ and long‐term effects ofpHon the forest soil microbiome and carbon cycling

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