Bryophytes as key indicators of ecosystem function …
Sphagnum, dominant in bogs and poor fens, and brown mosses, dominant in rich fens, make up a large percentage of the organic matter that is stored as deep deposits of peat.Web
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Sphagnum, dominant in bogs and poor fens, and brown mosses, dominant in rich fens, make up a large percentage of the organic matter that is stored as deep deposits of peat.Web
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The Lynch's Crater peat deposit in NE-Australia is a sensitive environmental archive located in the tropical Southern Hemisphere. This unique deposit illustrates that local and regional changes ...Web
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The Lynch's Crater peat deposit in NE-Australia is a sensitive environmental archive located in the tropical Southern Hemisphere. This unique deposit illustrates that local and regional changes had a profound effect on the local Australian ecosystem over the past 55. kyr.. To obtain a proxy of past climate changes, trace and major element …Web
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With this data as well as topography measurements of the peat deposit from one of the sites, we showed that minerotrophic and ombrotrophic peatlands can be …Web
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Thanks to their unique physical, chemical and biological properties, peat deposits are considered archives of past hydrological and vegetational changes on the peatland and …Web
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loss from peat layers. The dried peat decomposes, eliminating the peat layer under the stand in a few decades. The stands eventually die, many in their first century, and mosses reoccupy the area and begin building a new peat deposit, continuing the cycle. Management of pine invasions is not needed for preservation of Sierran fen ecosystems.Web
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For the first time, this work estimates atmospheric Pb deposition via a minerotrophic peat core in China. This will enhance the use of peat archives for studies of environmental change. ... Shotyk W (2002) The chronology of anthropogenic, atmospheric Pb deposition recorded by peat cores in three minerogenic peat deposits from …Web
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It is probable that the cycling of major compounds in minerotrophic peat deposits is related to the lithogenic admixture or to the deposition of dust particles (Le Roux et al. 2006), and that the basic cations content in tree rings are rather related to their content and availability from the exchangeable complex in soils.Web
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Sedimentological and biogeochemical measurements were conducted on minerotrophic peat in a wilderness area on a granitic plateau to reconstruct the local ecosystem's history and clarify the peat's response to local and global changes. The peat is less than 1900 years old. Its clay and iron (Fe) concentration profiles revealed an …Web
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Examination of the trophic status finds the deposit is comprised of minerotrophic peat (Mn) which transitions (Tr) to ombrotrophic peat (Om) in upper layers. The age model (A) dates the record at ...Web
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development. Many countries evaluate peat resources based on volume or area because the variations in densities and thickness of peat deposits make it difficult to estimate …Web
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A peat deposit occupying over 80 square kilometers, and averaging 8 meters in thickness, was discovered on the Caribbean coast of northwestern Panama near the town of Changuinola. ... Toward the edges, the deposit has a surface cover of more minerotrophic plants (such as swamp-forest trees, ferns, and palms). …Web
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A range of mire and peat macrofossils which can be found in northwest European peat bog (ombrotrophic) and fen (minerotrophic peatland) deposits are illustrated in an extensive series of figures ...Web
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We propose that future peatland definitions focus on carbon storage and potential greenhouse gas emissions. This involves four physical and chemical …Web
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A review of the literature exposes the conflicted use of topogenous and ombrogenous mires (Figure 3.18).For example, Wheeler (1999) referred the use of "ombrogenous wetlands" to be restricted "flattish surface". Yerima and Van Ranst (2005) referred to the tropical ombrogenous peat as lowland deposit. However, a large part of the literature agrees …Web
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A peat deposit occupying over 80 square kilometers, and averaging 8 meters in thickness, was discovered on the Caribbean coast of northwestern Panama near the town of Changuinola. ... Toward the edges, the deposit has a surface cover of more minerotrophic plants (such as swamp-forest trees, ferns, and palms). …Web
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MP1 was characterized by well-defined minerotrophic peat within a depth range of 46–62 cm, whereas the ash content and bulk density systematically decreased toward the top of the profile thus having more of an ombrotrophic status. ... The inorganic geochemistry of a peat deposit on the eastern Qinghai-tibetan plateau and insights into ...Web
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Peatlands play outsized roles in the global carbon cycle. Despite occupying a rather small fraction of the terrestrial biosphere (~3%), these ecosystems account for roughly one third of the global soil carbon pool. This carbon is largely comprised of undecomposed deposits of plant material (peat) that may be meters thick. The fate of this deep carbon …Web
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Some peat deposits (buried peat layers, perturbed peatlands) currently lack the ability to form peat. The formation and accumulation of the peat ... Minerotrophic mires showing the influence of local conditions. Ferrous‐ferric reactions account for the slope of the main area. The two parallel dark arrows (essentially following Nernst Equation ...Web
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The restored portion of the peatland consists of 15 ha, which was utilized for horticultural peat extraction from 1946 to 2000. This portion was initially a raised bog, which was extracted down to its minerotrophic peat layer and residual peat conditions of the site now resemble that of a fen with peat pH of 5.0–5.3 and specific electrical conductivity of …Web
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This is because most paleoecological research has focused on peat deposits in raised bogs, and is designed to relate bog surface data to climate conditions. However, underlying peat layers in a core from an ombrotrophic mire often correspond to the more minerotrophic periods of its development, specifically fen and fen-bog transition stages.Web
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Recent findings show that there are diverse ombtrotrophic peatlands also in Amazonia (Lähteenoja and Page, 2011;Lähteenoja et al., 2009Lähteenoja et al.,, 2012. According to peat chemical ...Web
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is very slow and oxygen from above cannot penetrate. Here, the peat is broken down only very slowly by anaerobic bacteria. The accumulation of partially decomposed material has been occurring at Orono Bog for about 10,000 years. Peat at Orono Bog is 25 feet deep in some places. Minerotrophic Minerotrophic Ombrotrophic Surface Water FlowWeb
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Recent peat accumulation rates in minerotrophic peatlands of the Bay James region, eastern Canada, inferred by 210 Pb and 137 Cs radiometric techniques. Appl. Radiat. Isotopes ... The inorganic geochemistry of a peat deposit on the eastern Qinghai-Tibetan Plateau and insights into changing atmospheric circulation in central Asia during …Web
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The past hydrological and peat conditions can be inferred as different vegetation species have different tolerances to groundwater level and peat types, in particular where nutrient influx to the system occurs via water from the river catchment (minerotrophic peat) or exclusively via rainfall (ombrotrophic peat) (Rieley et al. 2008; …Web
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The objectives of the work are: (1) to compare of the PAHs profile distribution patterns in permafrost peatlands of different botanical composition; (2) to identify of peat …Web
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loss from peat layers. The dried peat decomposes, eliminating the peat layer under the stand in a few decades. The stands eventually die, many in their first century, and …Web
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With this data as well as topography measurements of the peat deposit from one of the sites, ... Nutrient dynamics in minerotrophic peat mires. Aquatic Botany (1986) Weiss D. et al. The geochemistry of major and selected trace elements in a forested peat bog, Kalimantan, SE Asia, and its implications for past atmospheric dust deposition ...Web
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In contrast, minerotrophic peat deposits can dis-play up to 16-fold increases in Sr within one profile (Weiss. et al., 1999; Shotyk, 2002; Monna et al., 2004), a feature.Web
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This contrasts with the classification of peat as a soil deposit which focuses on somewhat different factors (e.g., ... The raised bog is an ombrotrophic system, while the lagg fen is by definition minerotrophic fen, and neither can continue in a fully functioning state without the other. Within landscapes dominated by peat, on the other hand ...Web
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As much as 10% of the total carbon stored in peatlands occurs in the tropics. Although tropical peatlands are poorly understood scientifically, they are increasingly exploited for a variety of human uses. Our objective was to measure baseline carbon cycling data in one type of tropical peatland in order to understand better how peat accumulates in these …Web
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Peat deposits consist primarily of Sphagnum peat at the surface with woody, sedge, and aquatic plant residues at depth15• Three of ... Site WS-3 is a minerotrophicWeb
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Patrick examined the diatoms of the mixed Patschke bog peat deposits (Texas, TX, USA), and ... (Oromia, Ethiopia) is a minerotrophic peat bog formed at 11418 ± 557 years cal BP, in a glacier over-excavation on a basaltic rock bed. The diatom sequence along the profile shows two regularly alternating phases (subaerial/aquatic), closely …Web
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Conventionally, ombrotrophic peat deposits have an inorganic content of <5% and minerotrophic deposits have an inorganic content of >5% (Tolonen, 1984), and ombrotrophic peats are generally more acidic (pH 3–4) than minerotrophic peats (pH 4–7) (Fig. 2). The lowest pH values occur in the upper peat sections (pH 3.5), increase steadilyWeb
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Peat deposits are found in the Niayes region of Senegal, which stretches along the coast from Dakar to St. Louis, an area characterized by a series of stable dunes and depressions lying behind the shoreline ... Cuban peat is coastal and minerotrophic and the vegetation is mostly mangroves or herbaceous plants. The most important peatland …Web
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This contrasts with the classification of peat as a soil deposit which focuses on somewhat different factors (e.g., FAO 2009 ). A widely accepted definition of peat as a soil states it must be at least 30% organic plant matter accumulated in situ (Joosten and Clarke 2002) with a thickness of 30 cm or more.Web
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The peat deposit is a compact, undisturbed remnant of a minerotrophic fen underlined by sand sediments. The main feature of the peat is a presence of a continuous, horizontal dark layer, about 5–15 cm thick, rich in charcoal, located in the middle of …Web
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Patrick examined the diatoms of the mixed Patschke bog peat deposits (Texas, TX, USA), and ... (Oromia, Ethiopia) is a minerotrophic peat bog formed at 11418 ± 557 years cal BP, in a glacier over …Web
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Numerous studies have shown that minerotrophic peat bogs faithfully record the atmospheric deposition of lithogenic, non-leachable and non ... pH of pore waters or ash concentrations throughout the peat column are often used as indicators of the ombrotrophic–minerotrophic boundary of peat deposits (Cortizas et al., 2002, Kylander …Web
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