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The classification of intertidal mudflats
The first level is obtained using tidal range as the discriminator. This is followed by sub-divisions defined by exposure to waves and by mudflat slope. Slope is separated into steep slope >0.04, and low slope <0.04, with a further possible category of very steep slope (∼0.16). ... allow the formation of distinct `types' of mudflat. Here ...
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(PDF) Peat Formation Processes Through the Millennia in Tidal …
The purpose of this study was to determine peat formation processes throughout the millennia in four tidal marshes in the Sacramento–San Joaquin Delta.
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Peat formation
Peat formation is the result of incomplete decomposition of the remains of plants growing in waterlogged conditions. This may happen in standing water (lakes or margins of slow flowing rivers) or under consistently high …
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Basic Information About Tropical Peatland Ecosystems
The functions of peatlands (peat soils) can be considered based on their two main elements: (1) the peat matter and (2) the water. Peat Matter: Peat matter is composed of carbon fibers that are mostly made of lignin; therefore, peat matter contains very few nutrients and desorbs nutrient ions (rather than adsorbing nutrients).Thus, the main …
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Paleoenvironment reconstruction and peat-forming conditions of …
In this study, a large number of thin and clean coal seams overlain by tidal flat deposits of Begrih Formation 8 indicate that frequent changes in the peat-forming mires occurred during the ...
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Vegetation and peat accumulation steer Holocene tidal–fluvial …
At the onset of peat formation, the contact between the tidal clay and the reed peat is sharp (3.78 m depth, LOI increase from 20% to >30%). Directly above this transition, a …
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Characteristics of Lowland Tropical Peatlands: Formation
3. 2. Tropical Peatlands. In tropic, peat is mainly formed under high prec ipitation a nd high-te mperature conditions, and it. is characteris ed by remains of branches, l eaves, roots, and trunks ...
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Anatomy of the transgressive depositional system in a sediment …
Along the China Mainland coast, tidal-flat depositional sequences and saltmarsh peat layers can be alternative indicators of sea-level change (Wang et al., 2013). Because of enormous sediment supply from the Yangtze River, rapid accretion could make the regressive tidal-flat succession over thick and dilute the carbon concentration in the ...
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No. 3929, 17, 1945 NATURE 195
The pollen analysis diagrams indicate that peat formation commenced in the boreal period. This was ... 6 ft.; since the depth of the peat commonly exceeds the maximum tidal range, subsidence of ...
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Trihalomethane and haloacetic acid formation potential of tropical peat
Haloacetic acid formation potential of peat water based on: (a) HAA5 formation, and (b) Total HAA5 formation Increased concentrations of DCAA and TCAA resulted in an increase in total HAA5 which ...
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Peat Formation Processes Through the Millennia in Tidal …
The purpose of this study was to determine peat formation processes throughout the millennia in four tidal marshes in the Sacramento-San Joaquin Delta. Peat cores collected at each site were analyzed for bulk density, loss on ignition, and percent organic carbon. Core data and spline fit age-depth models were used to estimate …
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Peat Mire
The difference between peat mires (e.g. bogs, swamps) formed in the temperate and tropical regions is related vegetation in balance of freshwater supplied by groundwater and rainfall. Water transports nutrients that are critical to plant growths, which in turn, supply plant litter on the peatland surface and decays in the acrotelm layer and accumulate in …
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Organic Carbon Stabilization Mechanisms in Mangrove Soils: A …
Peat formation and accumulation occur in some mangrove forests (e.g., Indonesia, Florida Everglades, and oceanic islands such as Micronesia and the Caribbean) but not in others (e.g., Brazil and most of East Asia). ... Allochthonous inputs occur through trapping of suspended solids in upstream and tidal water onto the forest floor.
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(PDF) Vegetation and peat accumulation steer Holocene tidal…
Lev ees and crevasses after 100 years under a range of fluvial-tidal boundary conditions. Left panels (A) to (C) show the final plain-view morphology.
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Barrier Islands and Lagoons
Barrier island formation requires a large source of sand, either from coastal sand deposits or marine sand deposits called shoals. ... and tides strong enough to move the sand, however, the tides must be weaker than the waves. In strong tidal areas, the flow speed through an inlet is not large enough for barrier formation. Slow rising sea ...
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What Is A Salt Marsh And How Is It Formed?
A salt marsh may also be known as a tidal marsh or a coastal salt marsh. The base of a salt marsh is made up of large amounts of peat, which consists of decomposing plant matter that may extend several feet in depth. The entire area is flooded by seawater at high tide and drained at low tide. This combination of flooding and peat …
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The influence of the taphonomically active zone on peat formation
We thus sampled peat from two contrasting mangrove sub-habitats: (1) a Rhizophora-dominated sheltered mangrove fringe site that is located behind the …
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What is a Salt Marsh? An Essential Ecosystem Explained
In addition to fostering the growth of plant and animal species, tidal cycles also contribute to the formation of unique land features within salt marshes. For example, the build-up of decomposing plant matter in the marshy soil leads to the creation of peat, a waterlogged, root-filled, and spongy material that can be several feet thick.
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Will a rising sea sink some estuarine wetland ecosystems?
In all simulations, the extent of peat formation increased with rising sea level as a result of the slope of the Teifi Marshes relative to the water table (Fig. 7, Fig. 8, Fig. 9). ... Tidal mudflats are important feeding grounds for birds and nurseries for juvenile fish, and hence the ecological importance of the area may shift from an ...
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The influence of the taphonomically active zone on peat formation
We thus sampled peat from two contrasting mangrove sub-habitats: (1) a Rhizophora-dominated sheltered mangrove fringe site that is located behind the seaward mangrove periphery of the wetland where the peat experiences semidiurnal tidal activity and is shielded from direct wave activity; and (2) an interior, mixed forest basin site, …
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Physical and Chemical Properties of Cultivated Peat Soils in …
Chemical composition and fertility of peat soils is determined by the thickness, maturity of the layers, mineral enrichment, substratum underlying the peat layer, and quality of water from rivers or tidal that influences the formation and maturation of peat soils (Widjaja Adhi 1986). Related to fertility status, the formation of peat
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Tidal Flat
Tidal flats in the Bohai Sea have an area of 2778.59 km 2, accounting for about 1/3 of the total tidal flat in China.These are mainly distributed in the Liaohe Estuary, Bohai Bay, and Huanghe River delta. The Liaohe Estuary is a delta estuary, with a gentle beach slope and width of 3–4 km.Its main vegetation is reed marsh, Suaeda salsa, Scirpus mariqueter, …
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(PDF) MANGROVE FORMEMATION PROCESS BEHIND THE PEAT …
Tidal flat formation on the coastal peat is a unique phenomenon that has occurred at western part of Bengkalis Island, Riau Province, Indonesia [3]. The existence of coastal peat in Indonesia has ...
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Landscape history of the Oer-IJ tidal system, Noord-Holland (the
Peat formation in construction pit site Uitgeest-De Kleis at that time (Appendix B1; Fig. App. B) – on top of tidal deposits of the Wormer Member and below beach-ridge sediments of Uitgeest – point to a sheltered position and thus to the presence of a protecting barrier seaward of this location.
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Tidal driven nutrient exchange between mangroves and
Tidal driven nutrient exchange and major biogeochemical processes shaping the source-sink pattern. Tides are the main hydrologic mechanism driving the lateral exchange of nutrients between mangroves and estuarine water. Nutrient fluxes were positively correlated with water fluxes across the mangrove-estuary interface (p < 0.05) …
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Peat Formation Processes Through the Millennia in Tidal …
The purpose of this study was to determine peat formation processes throughout the millennia in four tidal marshes in the Sacramento-San Joaquin Delta. Peat cores …
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Peat Formation Processes Through the Millennia in Tidal …
sites, suggesting that peat formation processes are dynamic and responsive to watershed conditions. The balance between inorganic sedimentation and organic accumulation at the sites also varied through time, indicating that marshes may rely more strongly on either inorganic or organic matter for peat formation at particular times in their ...
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Bangladesh's dynamic coastal regions and sea-level rise
Unlike much of Subregion Ja, the Ganges Tidal Floodplain (Region E) is mainly a stable land area. It is crossed by innumerable tidal rivers and creeks (Fig. 4) bounded by low, narrow levees with silty sediments which surround basins with heavy clay soils.Under natural conditions, the land was flooded at high tides, either throughout the …
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Late Quaternary peat formation and vegetation dynamics in a …
Because of their location, peat formation has generally been linked to sea level-related processes. Thus, Anderson, 1964, Anderson, 1983, Anderson and Muller, 1975 argue that the stabilisation of marine alluvium through an initial phase of mangrove colonisation is a pre-requisite for a process of vegetation succession that leads …
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Peat Formation Processes Through the Millennia in Tidal …
once a 1,400 km2 tidal marsh region ranging from brackish to fresh, but within the past 150 years over 90% of the region has been drained for agriculture (Atwater 1982). Currently, very little is known about peat formation in the Delta, let alone organic …
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