Sphagnum can ‘filter’ N deposition, but effects on the plant and pore water depend on the N form

Chiwa, Masaaki; Sheppard, Lucy J.; Leith, Ian D.; Leeson, Sarah R.; Tang, Y. Sim; Cape, J. N.

doi:10.1016/j.scitotenv.2016.03.130

Cited by 21 publications

(19 citation statements)

References 52 publications

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“…Thus, the alleviation effects of P and K addition on N assimilation of Sphagnum were observed for oxidized N, which could be related to the stage of N saturation of Sphagnum. Chiwa et al (2016b) found that the effect of oxidized N on advancing N saturation was lower than that of reduced N and that the stage of N saturation of Sphagnum exposed to Nox 56 over 11 years had not advanced compared to that for Nred 56. NO3uptake by Sphagnum caused DON leaching from Sphagnum that enables Sphagnum to delay N saturation of Sphagnum (Chiwa et al, 2016b).…”

Section: Enpo Chiwa Et Al Revised Msmentioning

confidence: 86%

“…Chiwa et al (2016b) found that the effect of oxidized N on advancing N saturation was lower than that of reduced N and that the stage of N saturation of Sphagnum exposed to Nox 56 over 11 years had not advanced compared to that for Nred 56. NO3uptake by Sphagnum caused DON leaching from Sphagnum that enables Sphagnum to delay N saturation of Sphagnum (Chiwa et al, 2016b). Chiwa et al Revised MS This study concludes that long-term additions of P and K have no major ameliorating effects on a Sphagnum moss subjected to continuous high N inputs.…”

Section: Enpo Chiwa Et Al Revised Msmentioning

confidence: 86%

“…1b). The N saturation of Sphagnum was caused by adding wet deposition of 56 kg N ha -1 yr -1 of reduced N over 11 years (Chiwa et al, 2016b). The P and K additions over 11 years did increase capitulum and stem P concentrations (Fig.…”

Section: Alleviation Effects Of Long-term P and K Addition On N Statumentioning

confidence: 93%

“…Field (Lamers et al, 2000;Bragazza et al, 2005;Limpens et al, 2011;Harmens et al, 2014) and manipulation studies (Berendse et al, 2001;Nordbakken et al, 2003;Granath et al, 2009;Sheppard et al, 2013;Chiwa et al, 2016b) have been conducted to evaluate the effects of increased N deposition on Sphagnum in bog peatlands. It has been found that increases in N deposition enhanced tissue N concentration in Sphagnum (Berendse et al, 2001;Heijmans et al, 2001;Nordbakken et al, 2003;Tomassen et al, 2003;Granath et al, 2009;Fritz et al, 2012;Chiwa et al 2016b) and eventually led to N saturation of Sphagnum, defined as an excess of N supply over N demands of plants, resulting in increased inorganic N leakage to the rizosphere Limpens et al, 2004;Chiwa et al, 2016b;Manninen et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Long-term interactive effects of N addition with P and K availability on N status of Sphagnum

Chiwa

Sheppard

Leith

et al. 2018

Environmental Pollution

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Little information exists concerning the long-term interactive effect of nitrogen (N) addition with phosphorus (P) and potassium (K) on Sphagnum N status. This study was conducted as part of a long-term N manipulation on Whim bog in south Scotland to evaluate the long-term alleviation effects of phosphorus (P) and potassium (K) on N saturation of Sphagnum (S. capillifolium). On this ombrotrophic peatland, where ambient deposition was 8 kg N ha yr, 56 kg N ha yr of either ammonium (NH, N) or nitrate (NO, N) with and without P and K, were added over 11 years. Nutrient concentrations of Sphagnum stem and capitulum, and pore water quality of the Sphagnum layer were assessed. The N-saturated Sphagnum caused by long-term (11 years) and high doses (56 kg N ha yr) of reduced N was not completely ameliorated by P and K addition; N concentrations in Sphagnum capitula for N 56 PK were comparable with those for N 56, although N concentrations in Sphagnum stems for N 56 PK were lower than those for N 56. While dissolved inorganic nitrogen (DIN) concentrations in pore water for N 56 PK were not different from N 56, they were lower for N 56 PK than for N 56 whose stage of N saturation had not advanced compared to N 56. These results indicate that increasing P and K availability has only a limited amelioration effect on the N assimilation of Sphagnum at an advanced stage of N saturation. This study concluded that over the long-term P and K additions will not offset the N saturation of Sphagnum.

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Section: Enpo Chiwa Et Al Revised Msmentioning

confidence: 86%

Section: Enpo Chiwa Et Al Revised Msmentioning

confidence: 86%

Section: Alleviation Effects Of Long-term P and K Addition On N Statumentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Long-term interactive effects of N addition with P and K availability on N status of Sphagnum

Chiwa

Sheppard

Leith

et al. 2018

Environmental Pollution

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“…In our study (as in Temmink et al with N concentrations >18 mg·g −1 DM), a toxic effect (growth reduction) of a high N tissue concentration >20 mg·g −1 DM was observed only in S. papillosum . Chiwa et al () found that an S. capillifolium lawn can filter wet N deposition of up to 32 kg N·ha −1 ·year −1 for least a decade, leading to N concentrations in the capitula of around 14 mg·g −1 DM.…”

Section: Discussionmentioning

confidence: 99%

Sphagnum growth under N saturation: interactive effects of water level and P or K fertilization

Gaudig

Krebs

2020

Plant Biol J

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Sphagnum biomass is a promising material that could be used as a substitute for peat in growing media and can be sustainably produced by converting existing drainagebased peatland agriculture into wet, climate-friendly agriculture (paludiculture). Our study focuses on yield maximization of Sphagnum as a crop.• We tested the effects of three water level regimes and of phosphorus or potassium fertilization on the growth of four Sphagnum species (S. papillosum, S. palustre, S. fimbriatum, S. fallax). To simulate field conditions in Central and Western Europe we carried out a glasshouse experiment under nitrogen-saturated conditions.• A constant high water table (remaining at 2 cm below capitulum during growth) ledto highest productivity for all tested species. Water table fluctuations between 2 and 9 cm below capitulum during growth and a water level 2 cm below capitulum at the start but falling relatively during plant growth led to significantly lower productivity. Fertilization had no effect on Sphagnum growth under conditions with high atmospheric deposition such as in NW Germany (38 kg N, 0.3 kg P, 7.6 kg KÁha À1 Áyear À1 ).• Large-scale maximization of Sphagnum yields requires precise water management, with water tables just below the capitula and rising with Sphagnum growth. The nutrient load in large areas of Central and Western Europe from atmospheric deposition and irrigation water is high but, with an optimal water supply, does not hamper Sphagnum growth, at least not of regional provenances of Sphagnum.Plant Biology 22 (2020) 394-403

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Sphagnum physiological responses to elevated temperature, nitrogen, CO2 and low moisture in laboratory and in situ microhabitats: a review

et al. 2022

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Sphagnum can ‘filter’ N deposition, but effects on the plant and pore water depend on the N form

Abstract: that the Sphagnum N filter is more resilient to wet N deposition than previously inferred. 30However, functionality will be more compromised when NH4 + dominates wet

Cited by 21 publications

References 52 publications

Long-term interactive effects of N addition with P and K availability on N status of Sphagnum

Long-term interactive effects of N addition with P and K availability on N status of Sphagnum

Sphagnum growth under N saturation: interactive effects of water level and P or K fertilization

Sphagnum physiological responses to elevated temperature, nitrogen, CO2 and low moisture in laboratory and in situ microhabitats: a review

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