BackgroundEnvironmental impacts of human activities on the deep seafloor are of increasing concern. While activities within waters shallower than 200 m have been the focus of previous assessments of anthropogenic impacts, no study has quantified the extent of individual activities or determined the relative severity of each type of impact in the deep sea.MethodologyThe OSPAR maritime area of the North East Atlantic was chosen for the study because it is considered to be one of the most heavily impacted by human activities. In addition, it was assumed data would be accessible and comprehensive. Using the available data we map and estimate the spatial extent of five major human activities in the North East Atlantic that impact the deep seafloor: submarine communication cables, marine scientific research, oil and gas industry, bottom trawling and the historical dumping of radioactive waste, munitions and chemical weapons. It was not possible to map military activities. The extent of each activity has been quantified for a single year, 2005.Principal FindingsHuman activities on the deep seafloor of the OSPAR area of the North Atlantic are significant but their footprints vary. Some activities have an immediate impact after which seafloor communities could re-establish, while others can continue to make an impact for many years and the impact could extend far beyond the physical disturbance. The spatial extent of waste disposal, telecommunication cables, the hydrocarbon industry and marine research activities is relatively small. The extent of bottom trawling is very significant and, even on the lowest possible estimates, is an order of magnitude greater than the total extent of all the other activities.Conclusions/SignificanceTo meet future ecosystem-based management and governance objectives for the deep sea significant improvements are required in data collection and availability as well as a greater awareness of the relative impact of each human activity.
Coastal steepening potentially presents an array of management issues in the form of financial implications of sea defence degradation, increased risk posed to the hinterland as wave attenuation is reduced, 'coastal squeeze' and statutory requirements in the light of the Habitats Directive. The extent to which coastal steepening has occurred throughout England and Wales has been investigated through use of a GIS and dataset based on historical Ordnance Survey map information. Data were collected along 1084 selected profile lines, positioned so as to be geomorphologically representative of the coast. Features recorded from each map year included the positions of mean high water (MHW) and mean low water (MLW), the relative movements of which infer changing intertidal gradients. The results presented in this paper are on a subject and scale not previously published. It is revealed that 61% of the coastline studied has experienced a tendency towards steepening. Of the remainder, 33% has flattened, and 6% has experienced no rotational movement. This tendency towards steepening has been the dominant movement on each of the west, south, and east coasts.
The Competition Commission's analysis in 2007 of entry and exit conditions among small stores across more than one thousand British high streets provided a landmark piece of research on a topic in which debate and policy recommendations had moved significantly, and arguably dangerously, ahead of the available evidence base. Within a general context of a continuing long-term decline of specialist small stores in British town centres and high streets, it cast considerable doubt on the popularly held view that a broad-based decline of the independent convenience store sector was taking place across the UK, or that Britain's high streets were experiencing an accelerating decline in their small and specialist stores. Additionally, and even more controversially, the Commission's analysis was able to demonstrate that competitive entry by larger format corporate food retailing was not inevitably and uniformly associated with negative impacts on the small store sector. It is known that the Commission's research was paralleled by an identical analysis conducted on behalf of one of the main parties to the Groceries Market Inquiry by the University of Southampton. The first component of the Southampton analysis, which both corroborated and extended the Commission's findings, is available in the public domain. This paper now presents the second component of the Southampton analysis, which similarly both corroborates but also extends the vitally important ‘conditional entry’ dimension of the Commission's research—focusing directly on the extent to which entry into the small store sector during the early to mid 2000s might have been constrained by, and exit from the sector accelerated by, the competitive impacts of larger format foodstore openings by the major corporate retailers. The paper shows: (a) that there is an important missing regional dimension within the Commission's analysis, and (b) that entry and exit into the small store sector in the UK during 2000–06 was constrained and/or accelerated by the competitive impacts of supermarket opening in a different fashion within ‘London and prospering southern England’ than elsewhere in the country. That is to say, in the region of the UK in which arguments about the threat of corporate retail to the diversity of the small store sector had often proved particularly heated, the Southampton analysis shows small shops in town centres and high streets to have been more robust to the competitive opening of larger format corporate foodstores than elsewhere in the UK. In that context, the paper suggests that the findings represent an ‘inconvenient truth’ which deserves consideration both in policy debate and in future processes of planning regulation reform. Discussion of the relevance of the findings in respect of the proposed changes to Planning Policy Statement 6 released for consultation by the Department for Communities and Local Government in July 2008 is presented.
This paper presents the results of an integrated historical and geophysical survey of a medieval town lost through cliff recession and coastal inundation. Key objectives included evaluating historic maps in supporting the relocation and identification of major buildings, and applying integrated multibeam, side-scan and sub-bottom profiling to determine the location and extent of archaeological remains. The results demonstrate that cartographic sources from 1587 onwards can be a reliable source of data to guide geophysical survey. Integration of historical mapping with geophysical data enabled identification of the remains of two medieval structures, and the tentative identification of two others.
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