Nitrogen and phosphorus cycling in an ombrotrophic peatland: a benchmark for assessing change

Salmon, V. G.; Brice, Deanne J.; Bridgham, Scott D.; Childs, Joanne; Graham, Jake D.; Griffiths, Natalie A.; Hofmockel, Kirsten; Iversen, Colleen M.; Jicha, Terri M.; Kolka, Randy; Kostka, Joel E.; Malhotra, Avni; Norby, R. J.; Phillips, Jana R.; Ricciuto, Daniel M.; Schadt, Christopher W.; Sebestyen, Stephen D.; Shi, Xiaoying; Walker, Anthony P.; Warren, Jeffrey M.; Weston, David J.; Hanson, P. J.

doi:10.1007/s11104-021-05065-x

Cited by 20 publications

(17 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These observations suggest that, due to the interspecific variations of eco‐physiological strategies, the biomass responses to N enrichment are divergent among plant growth forms in boreal peatlands. Similar to N, P is also an important nutrient for plant growth in peatlands (Øien, 2004; Li et al, 2019; Salmon et al, 2021), especially in rich fens (Øien & Moen, 2001; Øien et al, 2018), given that N enrichment often aggravates P limitation of plant production by disturbing the stoichiometric balance between N and P (Li et al, 2016). In this peatland, elevating soil N:P ratio after N addition (Appendix S2) indicates the N:P stoichiometric imbalance, implying that P availability may determine the ultimate response of plant biomass to N enrichment.…”

Section: Discussionmentioning

confidence: 99%

Cryptogams and dwarf evergreen shrubs are vulnerable to nitrogen addition in a boreal permafrost peatland of Northeast China

Wang

Lin

Zhang

et al. 2022

Applied Vegetation Science

View full text Add to dashboard Cite

Aim: Boreal peatlands are very sensitive to nitrogen (N) enrichment due to the low soil N availability. Our aim was to reveal how increased N availability altered plant composition in boreal permafrost peatlands with dense vascular plants (>50%).Location: Greater Khingan Mountains, Northeast China.Methods: A nitrogen addition experiment with four N addition levels (0, 3, 6, and 12 g N m −2 year −1 ) was conducted in a poor fen in the continuous permafrost zone with vascular plant coverage above 60%. Plant diversity, community composition, and above-ground biomass were investigated after four, six, and eight years of N addition.Results: Nitrogen addition decreased species richness and diversity but enhanced total above-ground biomass. Plant height determined the plants' responses to N addition, and the magnitudes increased with N addition level and experimental duration. The relative coverage of high-stature (>50 cm) species increased, but the relative coverage of low-stature (<50 cm) species decreased with elevating N addition levels.When N addition proceeded, the relative coverage and above-ground biomass of tall deciduous shrubs and nitrophilous grasses increased, whereas the relative coverage and above-ground biomass of dwarf evergreen shrubs, mosses, and lichens declined.Regardless of N addition levels, cryptogams (i.e., mosses and lichens) and a dwarf evergreen shrub (Chamaedaphne calyculata) disappeared after eight-year N addition.Conclusions: Cryptogams and dwarf evergreen shrubs are highly vulnerable to increased N availability, and N enrichment-induced biodiversity loss, especially the disappearance of cryptogams, will deteriorate ecosystem structure and function in boreal permafrost peatlands.

show abstract

Section: Discussionmentioning

confidence: 99%

Cryptogams and dwarf evergreen shrubs are vulnerable to nitrogen addition in a boreal permafrost peatland of Northeast China

Wang

Lin

Zhang

et al. 2022

Applied Vegetation Science

View full text Add to dashboard Cite

show abstract

“…Because of the predominance of the hummock–hollow microtopography across the bog, we used this peatland to investigate how moss decomposition varied at the microtopographic scale. The distribution of hummocks versus hollows in this bog was estimated at 67% hummocks and 33% hollows using terrestrial laser scanning (data citation – Graham et al 2019, Malhotra et al 2020, Salmon et al 2021). This bog has the greatest water table fluctuation compared to six other research peatlands on the MEF, with the historical record ranging from several centimeters above the surface to 1.4 m below the peat surface in hollows (Sebestyen et al 2011a).…”

Section: Methodsmentioning

confidence: 99%

Deciphering the shifting role of intrinsic and extrinsic drivers on moss decomposition in peatlands over a 5‐year period

Shelley

Brice

Iversen

et al. 2021

Oikos

Self Cite

View full text Add to dashboard Cite

Bryophytes are largely responsible for globally significant carbon accumulation in peatland ecosystems. This accumulation is primarily caused by the slow decomposition of these mosses, which can be attributed to a combination of intrinsic (chemical) characteristics of decaying mosses and extrinsic (environmental) influences. Here we investigated the importance of intrinsic and extrinsic drivers of moss decomposition in peatlands and hypothesized that the early stages of decay will be driven primarily by intrinsic characteristics, while extrinsic drivers will become more important in the later phases of decomposition. We tested this hypothesis by placing litterbags of three moss types (Sphagnum divinum, Sphagnum angustifolium/fallax and Polytrichum sp.) into hummock and hollow microtopographies in a bog and a lawn microtopography in a nearby poor fen in northern Minnesota, USA. Decomposition was measured over a 5-year period and confirmed our hypothesis; while intrinsic and extrinsic variables were both important in driving decay rates over time, decay in the first year was primarily predicted by litter type, while extrinsic influences (e.g. peat temperature, moisture, nutrient limitation) that varied at peatland and microtopographic scales became more important by year 5. Though the nutrient (i.e. nitrogen [N] and phosphorus [P]) content of decaying mosses did not explain the variation in decay rates among litter types, analysis of N:P in moss litter suggested that litter-decaying microorganisms became increasingly P-limited over time. The majority of litter decomposition studies in peatlands are generally of short duration (< 3 years). Our study suggests that longerterm studies are needed to reveal the roles of multiple drivers of moss decay. Improving the mechanistic understanding of decomposition processes in peatlands will be critical to developing more robust representations of peatlands and their ecosystem processes in carbon and climate models.

show abstract

“…Haapalehto et al (2014) reported longterm decreases in DOC and nutrient leaching but temporary increases in N and P for the first 5 years of degraded peatland restoration. In addition, major nutrient such as phosphorus and nitrogen content has been extensively studied in a restored peatland (Moore et al, 2005;Nieminen et al, 2017a;Munir et al, 2017;Salmon et al, 2021).…”

Section: Cluster #3mentioning

confidence: 99%

Mapping the restoration of degraded peatland as a research area: A scientometric review

Apori

Mcmillan

Giltrap

et al. 2022

Front. Environ. Sci.

View full text Add to dashboard Cite

Degraded peatland has reduced many ecosystem services, such as water quality and quantity, biodiversity, carbon storage, climate regulations, and other cultural benefits. Therefore, several initiatives for the restoration of degraded peatland (RDP) have attempted to restore the ecosystem processes, productivity, and services of the degraded peatland to its original natural condition. Notwithstanding the popularity of RDP research among researchers and industry practitioners, a quantitative technique to map a comprehensive survey of the intellectual core and the general body landscape of knowledge on RDP research does not exist. In this study, a scientometric analysis was employed to analyze 522 documents using VOSviewer and CiteSpace. The Web of Science database was used to retrieve bibliographic records using the advanced search “TS (topic) = (‘drained peatland restoration’ OR ‘drained bog restoration’ OR ‘drained mire restoration’ OR degraded peatland restoration’ OR ‘degraded bog restoration’ OR ‘drained peatland reclamation’ OR ‘drained bog restoration’ OR‘ degraded peatland reclamation’ OR ‘degraded bog reclamation’ OR‘ drained mire restoration’ OR ‘degraded mire reclamation’ OR ‘degraded fen restoration’ OR ‘drained fen reclamation’). “The outcome sought to provide relevant information in RDP research, such as (i) publication trends, (ii) research outlets, (iii) most influential keywords, (iv) most influential institutions and authors, and (v) top influential countries active in RDP research. In addition, four clusters were identified to ascertain the central theme of RDP research, in which cluster one is linked to the central research theme-“ impact of drainage on peatland ecosystem services; cluster two focused on the impact of peatland restoration on greenhouse gas emissions; cluster three is associated with peatland restoration and biogeochemical properties; and cluster four is related to peatland restoration and species richness. A new research hotspot, such as soil respiration, was identified via the keywords with the strongest citation bursts. This study will provide various stakeholders (e.g., industry, journal editors, policymakers, and researchers) with an instinctive understanding of the research status and the development frontier of RDP research.

show abstract

Nitrogen and phosphorus cycling in an ombrotrophic peatland: a benchmark for assessing change

Cited by 20 publications

References 41 publications

Cryptogams and dwarf evergreen shrubs are vulnerable to nitrogen addition in a boreal permafrost peatland of Northeast China

Cryptogams and dwarf evergreen shrubs are vulnerable to nitrogen addition in a boreal permafrost peatland of Northeast China

Deciphering the shifting role of intrinsic and extrinsic drivers on moss decomposition in peatlands over a 5‐year period

Mapping the restoration of degraded peatland as a research area: A scientometric review

Contact Info

Product

Resources

About