The hydrochemistry of peatland lakes as a result of the morphological characteristics of their basins

Banaś, Krzysztof

doi:10.2478/s13545-013-0057-z

Cited by 5 publications

(7 citation statements)

References 27 publications

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“…The morphology of pool banks and vegetation surrounding the pools may play an important role in the DOM dynamics and DOC concentrations of pools, as suggested by Arsenault et al (2018Arsenault et al ( , 2019, who studied 156 pools with a range of surface and depth comparable to our study site. A study conducted on 10 peatland pools showed that the size of the contact surface between water and peat (influenced by pool size, depth, and the slope of the banks) influenced the concentrations and composition of DOM (Banaoe, 2013). However, the pools studied by Banaoe (2013) were up to 10 times larger and deeper than in our studied peatland pools.…”

Section: Implications Of the Dom Exchange From Peat To Pools For The ...contrasting

confidence: 61%

“…A study conducted on 10 peatland pools showed that the size of the contact surface between water and peat (influenced by pool size, depth, and the slope of the banks) influenced the concentrations and composition of DOM (Banaoe, 2013). However, the pools studied by Banaoe (2013) were up to 10 times larger and deeper than in our studied peatland pools. At our site, there was no significant difference between the pools in their range of size (from 30 to 2065 m 2 ) and depth (from 70 to 120 cm) except for SUVA 254 (Table S5).…”

Section: Implications Of the Dom Exchange From Peat To Pools For The ...contrasting

confidence: 61%

“…The composition and reactivity of DOM transferred from the terrestrial to aquatic compartments of peatlands highly depend on the hydrology and hydroclimatic context, as well as the biological and chemical processes occurring during their transfer (Jaffé et al, 2012;Kaplan and Cory, 2016). The DOM transfers between peatlands and aquatic ecosystems are well documented for streams (Elder et al, 2000;Billett et al, 2006Billett et al, , 2012Austnes et al, 2010;Knorr, 2013;Frey et al, 2016;Buzek et al, 2019;Dean et al, 2019;Rosset et al, 2019) but more rarely for pools (Banaoe, 2013;Arsenault et al, 2019;Payandi-Rolland et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Differences in DOM composition and concentration between peat porewater and pools have been observed, but the processes involved remain unclear (Schindler et al, 1997;Payandi-Rolland et al, 2020). Studies conducted in temperate peatlands have highlighted that the morphology (e.g., size, shape, depth, and slope of banks) and surrounding vegetation influence the carbon content and hydrochemistry in the pools (Banaoe, 2013;Arsenault et al, 2018Arsenault et al, , 2019. Others have explained the changes in DOM composition in pools as the result of photodegradation and biodegradation (Laurion and Mladenov, 2013;Arsenault et al, 2019;Laurion et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Others have explained the changes in DOM composition in pools as the result of photodegradation and biodegradation (Laurion and Mladenov, 2013;Arsenault et al, 2019;Laurion et al, 2021). Studies investigating the changes in DOM composition in peatland porewater and pools have mostly been focused on temperate (Banaoe, 2013;Arsenault et al, 2019), subarctic, and Arctic regions (Laurion and Mladenov, 2013;Deshpande et al, 2016;Burd et al, 2020;Payandi-Rolland et al, 2020;Laurion et al, 2021;Moody and Worrall, 2021), but there is no insight about changes in DOM compositions in boreal peatlands not affected by permafrost.…”

Section: Introductionmentioning

confidence: 99%

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Dissolved organic matter concentration and composition discontinuity at the peat–pool interface in a boreal peatland

Prijac¹,

Gandois²,

Jeanneau

et al. 2022

Biogeosciences

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Abstract. Pools are common features of peatlands and can represent from 5 % to 50 % of the peatland ecosystem's surface area. Pools play an important role in the peatland carbon cycle by releasing carbon dioxide and methane to the atmosphere. However, the origin of this carbon is not well constrained. A hypothesis is that the majority of the carbon emitted from pools predominantly originates from mineralized allochthonous (i.e., plant-derived) dissolved organic matter (DOM) from peat rather than in situ primary production. To test this hypothesis, this study examined the origin, composition, and degradability of DOM in peat porewater and pools of an ombrotrophic boreal peatland in northeastern Quebec (Canada) for 2 years over the growing season. The temporal evolution of dissolved organic carbon (DOC) concentration, the optical properties, molecular composition (THM-GC-MS), stable isotopic signature (δ13C-DOC), and degradability of DOM were determined. This study demonstrates that DOM, in both peat porewater and pools, presents a diverse composition and constitutes highly dynamic components of peatland ecosystems. The molecular and isotopic analyses showed that DOM in pools was derived from plants. However, DOM compositions in the two environments were markedly different. Peat porewater DOM was more aromatic, with a higher molecular weight and DOC : DON (dissolved organic nitrogen) ratio compared to pools. The temporal dynamics of DOC concentration and DOM composition also differed. In peat porewater, the DOC concentration followed a strong seasonal increase, starting from 9 mg L−1 and reaching a plateau above 20 mg L−1 in summer and autumn. This was explained by seasonal peatland vegetation productivity, which is greater than microbial DOM degradation. In pools, DOC concentration also increased but remained 2 times lower than in the peat porewaters at the end of the growing season (∼ 10 mg L−1). Those differences might be explained by a combination of physical, chemical, and biological factors. The limited hydraulic conductivity in deeper peat horizons and associated DOM residence time might have favored both DOM microbial transformation within the peat and the interaction of DOM aromatic compounds with the peat matrix, explaining part of the shift of DOM compositions between peat porewater and pools. This study did not report any photolability of DOM and only limited microbial degradability. Thus, it is likely that the DOM might have been microbially transformed at the interface between peat and pools. The combination of DOM quantitative and qualitative analyses presented in this study demonstrates that most of the carbon present within and released from the pools originates from peat vegetation. These results demonstrate that pools represent a key component of the peatland ecosystem ecological and biogeochemical functioning.

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Section: Implications Of the Dom Exchange From Peat To Pools For The ...contrasting

confidence: 61%

Section: Implications Of the Dom Exchange From Peat To Pools For The ...contrasting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dissolved organic matter concentration and composition discontinuity at the peat–pool interface in a boreal peatland

Prijac¹,

Gandois²,

Jeanneau

et al. 2022

Biogeosciences

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Photochemical generation of photoactive compounds with fulvic-like and humic-like fluorescence in aqueous solution

Bianco¹,

Minella²,

Laurentiis³

et al. 2014

Chemosphere

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Individual architecture and photosynthetic performance of the submerged form of Drosera intermedia Hayne

Banaś,

Aksmann,

Płachno

et al. 2024

BMC Plant Biol

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Drosera intermedia grows in acidic bogs in parts of valleys that are flooded in winter, and that often dry out in summer. It is also described as the sundew of the most heavily hydrated habitats in peatlands, and it is often found in water and even underwater. This sundew is the only one that can tolerate long periods of submersion, and more importantly produces a typical submerged form that can live in such conditions for many years. Submerged habitats are occupied by D. intermedia relatively frequently. The aim of the study was to determine the environmental conditions and architecture of individuals in the submerged form of D. intermedia. The features of the morphological and anatomical structure and chlorophyll a fluorescence of this form that were measured were compared with analogous ones in individuals that occurred in emerged and peatland habitats. The submerged form occurred to a depth of 20 cm. Compared to the other forms, its habitat had the highest pH (4.71–4.92; Me = 4.71), the highest temperature and substrate hydration, and above all, the lowest photosynthetically active radiation (PAR; 20.4–59.4%). This form differed from the other forms in almost all of the features of the plant’s architecture. It is particularly noteworthy that it had the largest main axis height among all of the forms, which exceeded 18 cm. The number of living leaves in a rosette was notable (18.1 ± 8.1), while the number of dead leaves was very low (6.9 ± 3.8). The most significant differences were in the shape of its submerged leaves, in which the length of the leaf blade was the lowest of all of the forms (0.493 ± 0.15 mm; p < 0.001) and usually the widest. The stem cross-sectional area was noticeably smaller in the submerged form than in the other forms, the xylem was less developed and collaterally closed vascular bundles occurred. Our analysis of the parameters of chlorophyll fluorescence in vivo revealed that the maximum quantum yield of the primary photochemistry of photosystem II is the highest for the submerged form (Me = 0.681), the same as the maximum quantum yield of the electron transport (Me φE0 = 0.183). The efficiency of energy use per one active reaction center of photosystem II (RC) was the lowest in the submerged form (Me = 2.978), same as the fraction of energy trapped by one active RC (Me = 1.976) and the non-photochemical energy dissipation (DI0/RC; Me = 0.916). The ET0/RC parameter, associated with the efficiency of the energy utilization for electron transport by one RC, in the submerged plant reached the highest value (Me = 0.489). The submerged form of D. intermedia clearly differed from the emerged and peatland forms in its plant architecture. The submerged plants had a thinner leaf blade and less developed xylem than the other forms, however, their stems were much longer. The relatively high photosynthetic efficiency of the submerged forms suggests that most of the trapped energy is utilized to drive photosynthesis with a minimum energy loss, which may be a mechanism to compensate for the relatively small size of the leaf blade.

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The hydrochemistry of peatland lakes as a result of the morphological characteristics of their basins

Cited by 5 publications

References 27 publications

Dissolved organic matter concentration and composition discontinuity at the peat–pool interface in a boreal peatland

Dissolved organic matter concentration and composition discontinuity at the peat–pool interface in a boreal peatland

Photochemical generation of photoactive compounds with fulvic-like and humic-like fluorescence in aqueous solution

Individual architecture and photosynthetic performance of the submerged form of Drosera intermedia Hayne

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