Linkages between <i>Sphagnum</i> metabolites and peatland <scp>CO<sub>2</sub></scp> uptake are sensitive to seasonality in warming trends

Sytiuk, Anna; Hamard, Samuel; Céréghino, Régis; Dorrepaal, Ellen; Geissel, Honorine; Küttim, Martin; Lamentowicz, Mariusz; Tuittila, Eeva‐Stiina; Jassey, Vincent E. J.

doi:10.1111/nph.18601

Cited by 7 publications

(7 citation statements)

References 98 publications

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“…The reason why precipitation in the coldest season is the most important limiting factor may be that thicker snow in winter can protect spores from frost damage, and increased snow cover in combination with summer warming to improve soil water content (Jones et al, 1998), in addition, thicker snow has better adiabatic effect, and the soil temperature under it is less affected by air temperature fluctuations (Cline, 1997), so it can maintain non-freezing state in most of the winter, and soil microorganisms can carry out vigorous life activities, and finally promote nutrient mineralization (Brooks and Williams, 1999;Williams et al, 1998), thus providing sufficient water and nutrient for the growth and development of Sphagnum moss in the coming growing season (Bowman, 1992;Dorrepaal et al, 2004). Climate change radically alters the seasonal patterns of precipitation and temperature in northern latitudes (Fischer and Knutti, 2016;Santer et al, 2018;Wang et al, 2017), potentially affecting plant phenology and physiology (Sytiuk et al, 2022). Sphagnum moss prefers wet climate in general, because their photosynthesis can only be passively dependent on tissue water content, although they can store water, they cannot control its loss (Rydin and Jeglum, 2013;Titus et al, 1983;Weston et al, 2015).…”

Section: Climate Preference Of Sphagnum Mossmentioning

confidence: 99%

Assessing the Fate of Sphagnum Moss in the Hengduan Mountains under Climate Change

Shi

Tian

Wang

et al. 2023

Preprint

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Climate change is one of the most serious challenges facing mankind. Sphagnum moss plays an important role in the carbon sink of peatland. Understanding the potential distribution of Sphagnum moss under climate change scenarios is critical for the conservation and rational exploitation of it. In this study, we divided the Hengduan Mountains (HDM) into east (EHDM) and west (WHDM) parts to see the difference between the whole and the parts, and understand the effects of integrity and connectivity of the landscape on species distribution. Since no enough occurrence data in EHDM, we applied the occurrence data in WHDM. Then, MaxEnt model was employed to predict the potential distribution of Sphagnum moss and computed the migratory paths of the distribution center points. We found precipitation in the coldest quarter, daily range of average temperature, isothermality and slope were the main factors affecting the suitable habitat for Sphagnum moss in HDM and WHDM. In HDM, the current potential suitable habitat is 2.6×104 km2, and will increase over 8 times and tend to shift northeastward and higher elevations in the future. In WHDM, the suitable area is 1.06×104 km2, but will decline exceeds 70% under most future climate scenarios, and tend to shift southward and lower elevations. Landscape integrity and connectivity have a great impact on the distribution of HDM Sphagnum moss species. Overall, our findings provide a reference for the conservation and management of Sphagnum moss.

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Section: Climate Preference Of Sphagnum Mossmentioning

confidence: 99%

Assessing the Fate of Sphagnum Moss in the Hengduan Mountains under Climate Change

Shi

Tian

Wang

et al. 2023

Preprint

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“…2022) and their production for defence may be at the cost of primary productivity (Sytiuk et al . 2023). However, resource allocation in Sphagnum mosses among growth, defence, and reproduction is poorly known.…”

Section: Introductionmentioning

confidence: 99%

“…Polyphenols are important secondary metabolites produced by Sphagnum mosses. They play a role in anti-herbivory and anti-bacterial defence (Hamard et al 2019;Chen et al 2021;Sytiuk et al 2022) and their production for defence may be at the cost of primary productivity (Sytiuk et al 2023). However, resource allocation in Sphagnum mosses among growth, defence, and reproduction is poorly known.…”

Section: Introductionmentioning

confidence: 99%

A hidden herbivory effect on Sphagnum reproduction

Chen,

Liu,

Moles

et al. 2024

Plant Biol J

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Defence theories provide predictions about trade‐offs in the allocation of resources to defence and growth. However, very little is known about how pressure from herbivores influences the allocation of resources during reproduction. Two common peatland bryophyte species, Sphagnum angustifolium and S. capillifolium, were chosen as study species. Vegetative and reproductive shoots of both Sphagnum species were subjected to treatments with and without herbivores in a lab experiment. After 4 weeks of exposure to herbivores in a growth chamber, we measured biomass production, net photosynthesis rate, defence traits (phenolics in leachate and phenolics in extract), nonstructural carbohydrates (soluble sugar and starch), and reproductive traits (capsule number, weight and diameter, and spore germination) of both Sphagnum species. Reproductive shoots had higher constitutive defence than vegetative shoots in S. angustifolium, and a similar pattern was observed in S. capillifolium. With herbivory, reproductive shoots showed stronger induced defence (released more phenolics) than vegetative shoots in S. capillifolium, but not in S. angustifolium. Herbivory had no effect on capsule number, weight, or diameter, but reduced spore germination percentage by more than half in both species. Our study highlights the hidden effects of herbivory on reproduction of Sphagnum and indicates the presence of maternal effects in bryophytes. Ecologists will benefit from examining both quality‐ and quantity‐based traits when attempting to estimate the herbivory effect on plant fitness.

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“…Besides the direct effects of vascular plant encroachment on biogeochemical processes, climate changes can influence the survival of Sphagnum mosses (Bragazza, 2008; Eppinga et al, 2009; Fenner & Freeman, 2011), microbial communities (Barreto et al, 2021, 2023; Jassey et al, 2013; Jassey, Chiapusio, et al, 2011; Jassey, Gilbert, et al, 2011) and plant–microbial interactions (Jassey et al, 2018), indirectly reinforcing possible changes in biogeochemical processes. For example, Sphagnum mosses tend to produce more secondary metabolites under warmer conditions (Sytiuk et al, 2023), especially during summer, which in turn can negatively influence microbial community structure and functions (Sytiuk et al, 2021). On the contrary, drier and warmer conditions can strongly modify fungal community composition and functioning (Asemaninejad et al, 2018; Jassey et al, 2018), which can potentially positively influence ericaceous shrubs by facilitating the symbiotic acquisition of dissolved organic N (DON; Bragazza et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…For example, Sphagnum mosses tend to produce more secondary metabolites under warmer conditions (Sytiuk et al, 2023), especially during summer, which in turn can negatively influence microbial community structure and functions (Sytiuk et al, 2021). On the contrary, drier and warmer conditions can strongly modify fungal effects on the vegetation.…”

Section: Introductionmentioning

confidence: 99%

Ericoid shrub encroachment shifts aboveground–belowground linkages in three peatlands across Europe and Western Siberia

Buttler

Bragazza

Laggoun‐Défarge

et al. 2023

Global Change Biology

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In northern peatlands, reduction of Sphagnum dominance in favour of vascular vegetation is likely to influence biogeochemical processes. Such vegetation changes occur as the water table lowers and temperatures rise. To test which of these factors has a significant influence on peatland vegetation, we conducted a 3‐year manipulative field experiment in Linje mire (northern Poland). We manipulated the peatland water table level (wet, intermediate and dry; on average the depth of the water table was 17.4, 21.2 and 25.3 cm respectively), and we used open‐top chambers (OTCs) to create warmer conditions (on average increase of 1.2°C in OTC plots compared to control plots). Peat drying through water table lowering at this local scale had a larger effect than OTC warming treatment per see on Sphagnum mosses and vascular plants. In particular, ericoid shrubs increased with a lower water table level, while Sphagnum decreased. Microclimatic measurements at the plot scale indicated that both water‐level and temperature, represented by heating degree days (HDDs), can have significant effects on the vegetation. In a large‐scale complementary vegetation gradient survey replicated in three peatlands positioned along a transitional oceanic–continental and temperate–boreal (subarctic) gradient (France–Poland–Western Siberia), an increase in ericoid shrubs was marked by an increase in phenols in peat pore water, resulting from higher phenol concentrations in vascular plant biomass. Our results suggest a shift in functioning from a mineral‐N‐driven to a fungi‐mediated organic‐N nutrient acquisition with shrub encroachment. Both ericoid shrub encroachment and higher mean annual temperature in the three sites triggered greater vascular plant biomass and consequently the dominance of decomposers (especially fungi), which led to a feeding community dominated by nematodes. This contributed to lower enzymatic multifunctionality. Our findings illustrate mechanisms by which plants influence ecosystem responses to climate change, through their effect on microbial trophic interactions.

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Linkages between Sphagnum metabolites and peatland CO₂ uptake are sensitive to seasonality in warming trends

Cited by 7 publications

References 98 publications

Assessing the Fate of Sphagnum Moss in the Hengduan Mountains under Climate Change

Assessing the Fate of Sphagnum Moss in the Hengduan Mountains under Climate Change

A hidden herbivory effect on Sphagnum reproduction

Ericoid shrub encroachment shifts aboveground–belowground linkages in three peatlands across Europe and Western Siberia

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Linkages between Sphagnum metabolites and peatland CO2 uptake are sensitive to seasonality in warming trends

Cited by 7 publications

References 98 publications

Assessing the Fate of Sphagnum Moss in the Hengduan Mountains under Climate Change

Assessing the Fate of Sphagnum Moss in the Hengduan Mountains under Climate Change

A hidden herbivory effect on Sphagnum reproduction

Ericoid shrub encroachment shifts aboveground–belowground linkages in three peatlands across Europe and Western Siberia

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Product

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Linkages between Sphagnum metabolites and peatland CO₂ uptake are sensitive to seasonality in warming trends