Mires

Leuschner, Christoph; Ellenberg, Heinz

doi:10.1007/978-3-319-43048-5_3

Cited by 2 publications

(1 citation statement)

References 118 publications

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“…Regional differences in the realized niches along environmental gradients of individual mire species are well known in Europe, often mentioned in textbooks and monographs (Aletsee, 1967; Dierßen & Dierßen, 2001; Leuschner & Ellenberg, 2017; Wheeler, 1999). They hold especially for pH, the major determinant of mire and spring diversity (Cantonati et al, 2020; Joosten et al, 2017; Peterka et al, 2017), as evidenced by inter‐regional comparisons of Kooijman and Westhoff (1995), Hájková et al (2008), Štechová et al (2008), Plesková et al (2016), Graham et al (2019) and Peterka et al (2020).…”

Section: Introductionmentioning

confidence: 99%

Rising temperature modulates pH niches of fen species

Hájek

Těšitel

Tahvanainen

et al. 2021

Global Change Biology

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Rising temperatures may endanger fragile ecosystems because their character and key species show different habitat affinities under different climates. This assumption has only been tested in limited geographical scales. In fens, one of the most endangered ecosystems in Europe, broader pH niches have been reported from cold areas and are expected for colder past periods. We used the largest European-scale vegetation database from fens to test the hypothesis that pH interacts with macroclimate temperature in forming realized niches of fen moss and vascular plant species. We calibrated the data set (29,885 plots after heterogeneity-constrained resampling) with temperature, using two macroclimate variables, and with the adjusted pH, a variable combining pH and calcium richness. We modelled temperature, pH and water level niches for one hundred species best characterizing European fens using generalized additive models and tested the interaction between pH and temperature. Fifty-five fen species showed a statistically significant interaction between pH and temperature (adj p ˂ .01). Forty-six of them (84%) showed a positive interaction manifested

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Section: Introductionmentioning

confidence: 99%

Rising temperature modulates pH niches of fen species

Hájek

Těšitel

Tahvanainen

et al. 2021

Global Change Biology

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Evidence for glacial geological controls on the hydrology of Maine (USA) peatlands

Chen

Comas

Reeve

et al. 2020

Geology

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Freshwater pools commonly form eccentric crescent patterns in peatlands, an important atmospheric methane (CH4) source, and show an apparent spatial association with eskers in some deglaciated regions. However, the role of underlying permeable glacial deposits such as eskers in regulating hydrogeology, and perhaps even carbon cycling, in peatlands is rarely considered. In this study, ground-penetrating radar imaging and direct coring confirmed that clustered pools coincide with buried esker crests in contact with peat soil in Caribou Bog and Kanokolus Bog in Maine (USA). Hydraulic head and geochemical data combined with lidar indicate vertical water flow from shallow peat toward the permeable esker crests, suggesting enhanced downward transport of labile organic carbon that presumably accelerates rates of methanogenesis in deep peat. Eskers might therefore serve as proxies for enhanced CH4 production in deep peat, as supported by differences in dissolved CH4 profiles depending on proximity to pools. Geographic data compiled from multiple sources suggest that many peatlands with eccentric pools appear to be located proximal to esker systems in Maine and Fennoscandia. These geological factors may be important, previously unrecognized controls on water and the carbon cycle in peatlands.

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Mires

Cited by 2 publications

References 118 publications

Rising temperature modulates pH niches of fen species

Rising temperature modulates pH niches of fen species

Evidence for glacial geological controls on the hydrology of Maine (USA) peatlands

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