Long-term microclimate study of a peatland in Central Europe to understand microrefugia

Słowińska, Sandra; Słowiński, Michał; Marcisz, Katarzyna; Lamentowicz, Mariusz

doi:10.1007/s00484-022-02240-2

Cited by 13 publications

(3 citation statements)

References 92 publications

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“…This issue is particularly acute for boreal bogs. This is quite consistent with the basic thesis set out in reference [56] but requires further research.…”

Section: Specificity Of Relationships Within Complex Microlandscapessupporting

confidence: 91%

Complex Microlandscape as a Structural Unit of the Study of Spatiotemporal Development of an Ombrotrophic Suboceanic Bog

Ponomareva,

Zubov,

Shtang

et al. 2024

Quaternary

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Ombrotrophic suboceanic bogs are distinguished by a high diversity of complex microlandscapes within the bog massif. Each complex microlandscape is a separate intrabog ecosystem with a specific set of parameters and relationships. This study aims to assess the specifics of the characteristics and parameters of the complex microlandscapes as part of an ombrotrophic suboceanic Sphagnum bog and as stages of bog morphogenesis, and to establish the internal relationships and their relationship with external environmental factors. A comprehensive multidisciplinary approach was used to assess the functioning of the complex microlandscapes. It was found that the relationship with the air temperature is closer than with the bog water table dynamics. It was shown that the morphometric parameters of perennial dwarf shrubs can serve as indicators of the stages of development of bogs. The processes of the self-regulation of complex microlandscapes are weakened with the age of the complex microlandscape, as evidenced by an increase in the amplitude of temperature fluctuations and the level of bog waters, as well as the key physicochemical parameters of the peat deposit. This leads to a gradual, slow reorientation of the physicochemical processes occurring in the deposit, from the deposition of organic matter to the decomposition of peat biomass.

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“…This issue is particularly acute for boreal bogs. This is quite consistent with the basic thesis set out in reference [56] but requires further research.…”

Section: Specificity Of Relationships Within Complex Microlandscapessupporting

confidence: 91%

Complex Microlandscape as a Structural Unit of the Study of Spatiotemporal Development of an Ombrotrophic Suboceanic Bog

Ponomareva,

Zubov,

Shtang

et al. 2024

Quaternary

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“…The mire lies in the contact zone between oceanic and continental air masses, and thus experiences transitional climate conditions. The mean annual air temperature in the area is 8.2°C and the total annual precipitation is about 530 mm (average 1951–2015 data from a station maintained by the Institute of Meteorology and Water Management, located about 25 km from the mire; Słowińska et al, 2010, 2022; Lamentowicz et al, 2016). Linje mire is surrounded by a mixed forest dominated by Pinus sylvestris , Betula pendula , Quercus robur and Picea abies .…”

Section: Methodsmentioning

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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“…Hereafter, we call this type of study the “top‐down” approach. In contrast, “bottom‐up” studies investigating sites that resemble or match the definition of microrefugia are still very scarce (but see Bátori et al, 2019 ; García et al, 2020 ; Słowińska et al, 2022 ). Such studies are necessary to examine the link between the microclimatic variations highlighted by top‐down studies and the emergence of microrefugia.…”

Section: Introductionmentioning

confidence: 99%

Bridging the gap between microclimate and microrefugia: A bottom‐up approach reveals strong climatic and biological offsets

Finocchiaro

Mèdail

Saatkamp

et al. 2022

Global Change Biology

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In the context of global warming, a clear understanding of microrefugia-microsites enabling the survival of species populations outside their main range limits-is crucial.Several studies have identified forcing factors that are thought to favor the existence of microrefugia. However, there is a lack of evidence to conclude whether, and to what extent, the climate encountered within existing microrefugia differs from the surrounding climate. To investigate this, we adopt a "bottom-up" approach, linking marginal disconnected populations to microclimate. We used the southernmost disconnected and abyssal populations of the circumboreal herbaceous plant Oxalis acetosella in Southern France to study whether populations in sites matching the definition of "microrefugia" occur in particularly favorable climatic conditions compared to neighboring control plots located at distances of between 50 to 100 m. Temperatures were recorded in putative microrefugia and in neighboring plots for approximately 2 years to quantify their thermal offsets. Vascular plant inventories were carried out to test whether plant communities also reflect microclimatic offsets. We found that current microclimatic dynamics are genuinely at stake in microrefugia. Microrefugia climates are systematically colder compared to those found in neighboring control plots. This pattern was more noticeable during the summer months. Abyssal populations showed stronger offsets compared to neighboring plots than the putative microrefugia occurring at higher altitudes. Plant communities demonstrate this strong spatial climatic variability, even at such a microscale approach, as species compositions systematically differed between the two plots, with species more adapted to colder and moister conditions in microrefugia compared to the surrounding area.

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Long-term microclimate study of a peatland in Central Europe to understand microrefugia

Cited by 13 publications

References 92 publications

Complex Microlandscape as a Structural Unit of the Study of Spatiotemporal Development of an Ombrotrophic Suboceanic Bog

Complex Microlandscape as a Structural Unit of the Study of Spatiotemporal Development of an Ombrotrophic Suboceanic Bog

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

Bridging the gap between microclimate and microrefugia: A bottom‐up approach reveals strong climatic and biological offsets

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