Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Raised bog"”.
-
Nocturnal Lepidoptera of Midland Raised Bogs
Raised bogs started to form in Ireland at least 7000 years ago when peat started to accumulate in water-filled depressions left after the last glacial period. Due to centuries of damaging human activities, only 1% of the living, growing active raised bog habitat remains and this is rapidly being …
-
Restoration of lowland raised bogs damaged by peat extraction - with particular emphasis on Sphagnum regeneration.
… too dry for spontaneous re-establishment of raised bog vegetation. The latter was restricted to small flooded peat pits which had recolonised 'hydroserally' to support floating rafts of bog vegetation. 2. The water storage capacity of cut-over bog surfaces is low compared with undisturbed bog …
-
The Development of a Hydrological Buffer Zone Strategy for Designating the Mesotope Protection Zone of Raised Mire Systems
… aid decisionmaking concerning the management of raised bogs for future sustainability, and specifically to provide a tool to identify the extents and locations of those areas around the bog margins within which water tables need to be managed. Undesirable water losses resulting from damage to …
-
An investigation into the origin and nature of some organic deposits of the Ingleborough region
… by aquatic mosses, then reed swamps and finally raised bog. Peat formation began in zone V, and raised bog was initiated at the Boreal-Atlantic transition, when the climate became wetter. An important recurrence surface was found in, sub-zone VIIb, where the peat changes noticeably from a …
-
Archaeology and environment in the vale of York
… and the problems of the genesis of this lowland raised bog and also to discuss more widely the insect fauna of undisturbed forest and the effects of human interference, particularly forest clearance, upon it. The Roman sewer in York contrasts with the largely natural environments examined …
-
Use of carbon isotope and C/N geochemistry in reconstructing vegetation communities: a mid- to late- Holocene palaeoenvironmental investigation from Romney Marsh, Kent, UK
… (btween 15 and 80). In the fossil core, former raised bog, sedge fen, alder carr and saltmarsh communities, identified by pollen and microfossil remains, have been tested for ς¹³C and C/N. There is eveidence for post-depositional changes in the alder carr communities, with a negative shift of …
-
Keeping above the waves? The response of coastal freshwater peatlands to sea-level rise
… sites are investigated: Cors Fochno, a coastal raised bog in mid-Wales, and Wheatfen, an estuarine floodplain fen in Norfolk. Localised sea level projections for two storylines to the year 2300 are applied at these sites, as well as at Cors Crymlyn in south Wales, and South Solway Mosses in …
-
Geophysical Characterisation and Evolutionary Model of the Quaternary sediments in the North Offaly region of Central Ireland
… ridges, glaciodeltas, sub-aqueous fans or raised bog. A centre antenna frequency of 200MHz gave a better spatial resolution that 100MHz but a lower penetration and also took longer to collect the data. Amplitude analysis of 2D GPR data assisted in the lithological classification of these …
-
Geochemical and palynological signals for palaeoenvironmental change in south west England
… located on the granitic upland of Dartmoor. A raised bog, Tor Royal, provided data relating to the changing nature of the central upland landscape from late Mesolithic times to the present day. Two soligenous sites. Upper Merrivale and Piles Copse, sought to investigate the activities of …
-
Methane potential of upper Fort Union formation sandstones, Campbell County, Wyoming
… deltas, a fluvially dominated model with raised bogs limiting lateral migration of the fluvial system, and a low-lying swamp model. The lacustrine model consists only of sandstones greater than 40 ft thick and does not display the north-south trending main trunk. The current evidence does …
-
Carbon dynamics in restiad peatlands across different timescales
… all, we compare contemporary CO₂ fluxes at two raised bogs, one of which is extremely dry in an international context (Moanatuatua), with the summer water table drawdown approaching one metre, and another where the water table is high and stable (Kopuatai). We found that despite the low and …
-
Holocene climate change and peatland dynamics in southern Sweden based on tree-ring analysis of subfossil wood from peat deposits
… Swedish peat deposits. By cross-dating Swedish bog-pine ring-width (RW) chronologies with corresponding material from North-west Germany, three Swedish RW chronologies were assigned absolute ages and yielded continuous, dated chronologies over the periods 5284-3728 BC and 2668-1108 BC. The …