Unraveling the Importance of Polyphenols for Microbial Carbon Mineralization in Rewetted Riparian Peatlands

Zak, Dominik; Roth, Cyril; Unger, Viktoria; Goldhammer, Tobias; Fenner, Nathalie; Freeman, Chris; Jurasinski, Gerald

doi:10.3389/fenvs.2019.00147

Cited by 39 publications

(31 citation statements)

References 65 publications

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“…Microbiology: The microbiomes of peat soils are composed of bacteria, archaea and microbial eukaryotes and are important agents of carbon, nitrogen (N) and phosphorus (P) cycling. The phylogenetic composition and expression of catalyzing enzymes play a major role in peat formation and GHG emission [43,44]. Methane (CH 4 ), for example, is almost exclusively produced by methanogenic archaea as an end product of anaerobic respiration [45,46].…”

Section: Interacting Research Areas In the Wetscapes Approachmentioning

confidence: 99%

From Understanding to Sustainable Use of Peatlands: The WETSCAPES Approach

et al. 2020

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Of all terrestrial ecosystems, peatlands store carbon most effectively in long-term scales of millennia. However, many peatlands have been drained for peat extraction or agricultural use. This converts peatlands from sinks to sources of carbon, causing approx. 5% of the anthropogenic greenhouse effect and additional negative effects on other ecosystem services. Rewetting peatlands can mitigate climate change and may be combined with management in the form of paludiculture. Rewetted peatlands, however, do not equal their pristine ancestors and their ecological functioning is not understood. This holds true especially for groundwater-fed fens. Their functioning results from manifold interactions and can only be understood following an integrative approach of many relevant fields of science, which we merge in the interdisciplinary project WETSCAPES. Here, we address interactions among water transport and chemistry, primary production, peat formation, matter transformation and transport, microbial community, and greenhouse gas exchange using state of the art methods. We record data on six study sites spread across three common fen types (Alder forest, percolation fen, and coastal fen), each in drained and rewetted states. First results revealed that indicators reflecting more long-term effects like vegetation and soil chemistry showed a stronger differentiation between drained and rewetted states than variables with a more immediate reaction to environmental change, like greenhouse gas (GHG) emissions. Variations in microbial community composition explained differences in soil chemical data as well as vegetation composition and GHG exchange. We show the importance of developing an integrative understanding of managed fen peatlands and their ecosystem functioning.

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Section: Interacting Research Areas In the Wetscapes Approachmentioning

confidence: 99%

From Understanding to Sustainable Use of Peatlands: The WETSCAPES Approach

et al. 2020

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“…The complex microbiomes of peat soils are composed of bacteria, archaea and microbial eukaryotes and are important agents of C, N and P cycling. The phylogenetic composition and expression of catalyzing enzymes play a major role in peat formation and GHG emission [42,43]. Methane (CH4) for example is almost exclusively produced by methanogenic archaea as an end product of anaerobic respiration [44,45].…”

Section: The Wetscapes Approachmentioning

confidence: 99%

From Understanding to Sustainable Use of Peatlands: The WETSCAPES Approach

Jurasinski¹,

Ahmad²,

Anadon‐Rosell³

et al. 2020

Preprint

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Of all terrestrial ecosystems, peatlands store carbon most effectively. However, many peatlands have been drained for peat extraction or agricultural use. This converts peatlands from sinks to sources of carbon, causing approx. 5% of the anthropogenic greenhouse effect and additional negative effects on other ecosystem services. Rewetting peatlands can mitigate the climate crisis and may be combined with management in the form of paludiculture. Rewetted peatlands, however, do not equal their pristine ancestors and their ecological functioning is not understood. This holds especially for fens. Their functioning results from complex interactions and can only be understood following an integrative approach of many relevant fields of science, which we develop in the interdisciplinary project WETSCAPES. Here, we introduce our approach in which we are addressing interactions among water transport and chemistry, primary production, peat formation, matter transformation and transport, microorganisms and greenhouse gas exchange using state of the art methods in the relevant research fields. We record data on six study sites spreading across three important fen types (Alder forest, percolation fen, and coastal fen) each in drained and rewetted state. Using exemplary results, we show the importance of developing an integrative understanding of managed fen peatlands and their ecosystem functioning.

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“…The enzymic latch theory implies that the increase in phenols, due to a decrease of phenoloxidase activity, inhibits the activity of hydrolytic enzymes, and thereby facilitates the accumulation of organic matter. In recent years, this theory has been widely discussed, with studies that have provided both positive and negative evidence [53,64]. Although the present research is focused on verifying this theory, the differences found seemed to provide evidence for the recovery of the "enzymic latch" in NWS with respect to CS.…”

Section: Discussionmentioning

confidence: 59%

Comparison among Different Rewetting Strategies of Degraded Agricultural Peaty Soils: Short-Term Effects on Chemical Properties and Ecoenzymatic Activities

Giannini

Peruzzi²,

Masciandaro³

et al. 2020

Agronomy

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In 2013, a pilot experimental field of about 15 ha was set up within the basin of Lake Massaciuccoli (Tuscany, Italy) in order to compare different management strategies—a paludicultural system (PCS), a constructed wetland system (CWS), a nearly-natural wetland system (NWS)—for peatland restoration after almost a century of drainage-based agricultural use (CS). After five years, changes in peat soil quality were investigated from a chemical, biochemical, and ecoenzymatic perspective. The soil in CS was mainly characterized by oxidant conditions, higher content of overall microbial activity, low levels of easily available phosphorus for vegetation, and medium total carbon content ranging from 25.0% to 30.7%. In PCS, the levels of total carbon and the content of bioavailable P were higher, while the oxidant conditions were lower compared to the other systems. As expected, the soils in CWS and NWS were characterized by the most reduced conditions and by the highest levels of arylsulphatase activity. It was noteworthy that soils in the NWS systems were characterized by the highest level of nonavailable P. Outputs from ecoenzymatic activity confirmed the physico-chemical and biochemical results.

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Unraveling the Importance of Polyphenols for Microbial Carbon Mineralization in Rewetted Riparian Peatlands

Cited by 39 publications

References 65 publications

From Understanding to Sustainable Use of Peatlands: The WETSCAPES Approach

From Understanding to Sustainable Use of Peatlands: The WETSCAPES Approach

From Understanding to Sustainable Use of Peatlands: The WETSCAPES Approach

Comparison among Different Rewetting Strategies of Degraded Agricultural Peaty Soils: Short-Term Effects on Chemical Properties and Ecoenzymatic Activities

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