Discharge competence and pattern formation in peatlands: a meta-ecosystem model of the Everglades ridge-slough landscape.

Regular landscape patterning arises from spatially-dependent feedbacks, and can undergo catastrophic loss in response to changing landscape drivers. The central Everglades (Florida, USA) historically exhibited regular, linear, flow-parallel orientation of high-elevation sawgrass ridges and low-elevation sloughs that has degraded due to hydrologic modification. In this study, we use a meta-ecosystem approach to model a mechanism for the establishment, persistence, and loss of this landscape. The discharge competence (or self-organizing canal) hypothesis assumes non-linear relationships between peat accretion and water depth, and describes flow-dependent feedbacks of microtopography on water depth. Closed-form model solutions demonstrate that 1) this mechanism can produce spontaneous divergence of local elevation; 2) divergent and homogenous states can exhibit global bi-stability; and 3) feedbacks that produce divergence act anisotropically. Thus, discharge competence and non-linear peat accretion dynamics may explain the establishment, persistence, and loss of landscape pattern, even in the absence of other spatial feedbacks. Our model provides specific, testable predictions that may allow discrimination between the self-organizing canal hypotheses and competing explanations. The potential for global bi-stability suggested by our model suggests that hydrologic restoration may not re-initiate spontaneous pattern establishment, particularly where distinct soil elevation modes have been lost. As a result, we recommend that management efforts should prioritize maintenance of historic hydroperiods in areas of conserved pattern over restoration of hydrologic regimes in degraded regions. This study illustrates the value of simple meta-ecosystem models for investigation of spatial processes.

The transformation of landscape as as aesthetic idear

The present study seeks to thoroughly investigate and delineate the concept alongside the transformation of landscape as an aesthetic idea. On the one side it runs that nature perceived as landscape remains nothing else but granted, evident or 'natural'. On yet another side, and to some fairly significant extend, this thesis identifies landscape as a sheer idea and concept that is shaped and (re-)mediated in an ongoing process. The thesis examines the role of the observer and brings into agreement that every landscape is a produce of creative mental processes. In brief outline, this approach provides a framework for identifying landscape as being inextricably linked with media from the very beginning of their social and cultural inception. As glowing examples for the paradigmatic shift of the classical subjective vision model culminating in the emergence of a new prototype, the camera obscura, together with the panorama, fortify the prevailing argument that the mode of human sense perception is organised and determined by earlier acquainted recognitions. In this matter, as each and every medium strive after accomplishment, then this accomplishment is substantially determined by overwhelming historic, as well as thriving cultural circumstances. In conclusive terms, this study seeks to show how landscape counts as content of a representation, while simultaneously being a very own medium that specifically carries social, geological as well as historic knowledge. In fact, modern vision shall therefore never be bound to any single format or process, rather it will have to always undergo procedures aiming at reshaping the perceivable. Landscape is playing out its major characteristic, specifically that of being, in essence, a purely intellectual, virtual and synthetic product

Rapid assessment of historic, current and future habitat quality for biodiversity around UK Natura 2000 sites

Changes in landscape composition and structure may impact the conservation and management of protected areas. Species that depend on specific habitats are at risk of extinction when these habitats are degraded or lost. Designing robust methods to evaluate landscape composition will assist decision- and policy-making in emerging landscapes. This paper describes a rapid assessment methodology aimed at evaluating landcover quality for birds, plants, butterflies and bees around seven UK Natura 2000 sites. An expert panel assigned quality values to standard Coordination of Information on the Environment (CORINE) landcover classes for each taxonomic group. Quality was assessed based on historical (1950, 1990), current (2000) and future (2030) land-cover data, the last projected using three alternative scenarios: a growth applied strategy (GRAS), a business-as-might-beusual (BAMBU) scenario, and sustainable European development goal (SEDG) scenario. A quantitative quality index weighted the area of each land-cover parcel with a taxa-specific quality measure. Land parcels with high quality for all taxonomic groups were evaluated for temporal changes in area, size and adjacency. For all sites and taxonomic groups, the rate of deterioration of land-cover quality was greater between 1950 and 1990 than current rates or as modelled using the alternative future scenarios (2000– 2030). Model predictions indicated land-cover quality stabilized over time under the GRAS scenario, and was close to stable for the BAMBU scenario. The SEDG scenario suggested an ongoing loss of quality, though this was lower than the historical rate of c. 1% loss per decade. None of the future scenarios showed accelerated fragmentation, but rather increases in the area, adjacency and diversity of high quality land parcels in the landscape.

Placing pits: landscape occupation and depositional practice during the Neolithic in East Anglia

This paper takes Neolithic pits as a starting point from which to investigate the broader issues of settlement and deposition in Britain at that time. It suggests that while sites made up primarily, and often only, of pits have recently been incorporated much more readily into accounts of the period, they are still not well understood. It is only by investigating the character of occupation across the landscape as a whole, and the nature of deposits in a variety of different contexts, that we will be able to understand pits, settlement, or deposition fully. On the basis of a study of this kind, it is suggested that pits were sited in specific locations which might be considered suitable for ‘settlement’; it is also demonstrated that deposition varied considerably between contexts and over time. By including large numbers of sites known only through ‘grey’ reports and Historic Environment Records, the study draws on an important body of work which has been under-used in the past. The paper focuses primarily on East Anglia, a region well-known for its pit sites but not well-known for its monuments; in doing so, it aims to counterbalance the weight of previous narratives which have tended to focus on other parts of Britain.

Buxton silver gum reserve: using geographic information systems to investigate historic change in site integrity

Eucalyptus crenulata is a rare species known from only two populations. The Buxton Silver Gum Reserve was set aside in 1978 for the conservation of the species, but this objective may be compromised by changes in the integrity of the landscape immediately surrounding the Reserve. A time sequence of aerial photos and Geographic Information Systems technology has been used to identify patterns of landscape change, and aid in determining appropriate management strategies to minimize negative impacts caused by landscape fragmentation and habitat exposure

Developing sustainable communities : the case for Port Phillip Heads historic towns, Sorrento and Queenscliff

The Victorian towns of Sorrento and Queenscliff are located either side of Port Phillip Heads. Using these towns as case studies, this paper examines what happens to historic coastal townships caught up in the phenomenon of sea change. Both towns are currently facing huge planning battles and are trying to argue a case for heritage in the rush for expansion and modernisation. Newcomers like to emulate the metropolis in the seaside towns. Planners in the metropolis are asked to make decisions by developers who are thwarted by local municipalities. These towns encapsulate something of the dilemma that comes with a demographic shift from the metropolitan centre to coastal townships and demonstrate that the transition from urban life and built environment does not translate without cost to a fragile coastal environment. It is place itself that has attracted humans to Sorrento and Queenscliff over centuries. The seascape, the landscape, the environment drew the indigenous peoples here centuries ago. It provided abundant food and was inspiring. Europeans came at the very beginning of the 19th century seeking new lands. By the late decades of the 19th century Europeans discovered the seaside and its health giving qualities and built substantial Victorian edifices to house the influx of visitors and holiday-makers who arrived by ferry. However, not until the second half of the twentieth century did development begin to intrude significantly on the landscape. And by the twenty-first century evidence is mounting that development is destroying the sense and character of place, which initially enticed people to come here.

Garden & landscape heritage:a crisis of tangible & intangible comprehension and curatorship

The cultural landscape of George Town, Penang, Malaysia, embraces the historic enclave of George Town as well as a range of other significant colonial vestiges adjacent to the entrépôt. Many of these landscapes cannot be isolated from the énclave as they are integral to and part of its cultural mosaic and character. Perhaps the most important are the Penang Hill hill-station landscape and the 'Waterfall‘ Botanic Gardens. The latter is an under-valued 'garden of the empire‘—a garden that significantly underpinned the development and historical and botanical stature of the Singapore Botanic Gardens.This paper reviews the cultural significance of colonial botanic gardens as they were established around the world during the scientific explosion of the late 1800s. It addresses their position within World Heritage listings, and considers the role, significance and importance of the 'Waterfall‘ Botanic Gardens within this context, within the concept of 'cultural landscapes‘, and critiques its absence from the recent World Heritage Listing of the colonial enclaves of Georgetown and Meleka in Malaysia.

Found footage: recycling historic material a-historically

The digital has speeded up multi-platform image delivery, to impose sampling and collagic strategies into the way we process information. This is a trauma inducing situation. During an earlier period of technological change reading the moving landscape similarly overwhelmed the early train traveller. Wolfgang Schivelbusch noted that ‘The inability to acquire a mode of perception adequate to technological travel crossed all political, ideological and aesthetic lines.’ (1983) New perceptual strategies had to be developed that contextualized the blur and the streak produced by looking out the train window without overwhelming the viewer. Utilizing Chris Brewin’s (2001) model of two parallel memory systems, this paper argues that, as another round of unprecedented technological change impacts on our senses, another ‘re-alignment’ of the senses is required. Chris Brewin’s (2001) model of two parallel memory systems, of Verbally Accessible Memory (VAM) and Situational Accessible Memory (SAM), suggests that the current information explosion requires a greater emphasis on the SAM system for processing information and critical thinking. Processed through the amygdala, SAM is implicit, situationally triggered, information intensive and conveys no sense of time. Found footage films, like those of Martin Arnold and Peter Tscherkassky that cut up, layer, repeat and recycle historic imagery perform the sampling and collagic strategies that characterize this SAM memory system to demonstrate a more visually based mode of critical thinking.

The evolution of national level historic district registration and conservation in China: the Beijing Yandaixiejie and Beijing Guozijian districts in Beijing, China

From the 1980s, Chinese experts from some mainland universities, such as Tongji Universtiy in Shanghai and Tsinghua University in Beijing, commenced research into heritage management and historic architectural conservation in China. With the announcement of the First and Second Lists of 10 Chinese Historic and Cultural Districts in 2009 and 2010, the conservation of historic districts was generally received and elevated in agreements from state-level government to local level governments. This paper considers literature about international and Chinese regulations and presents the evolution of historic district conservation in China. The paper explores the effective and ineffective results of the “Selection Contest of Chinese Top 10 Historic and Cultural Districts” in two cases selected from the First and Second Lists of 10 Chinese Historical and Cultural Districts during upon recent research and investigations. In each example, the paper provides a detailed examination of public awareness and their evaluation of conservation effectiveness through questionnaires.

Navigating teacher education: mapping the terrain, surveying the landscape

While there are many small-scale case studies that investigate specific teacher education practices, large scale longitudinal studies designed to provide rich and comprehensive data about the effectiveness of teacher education, are limited (Cochran-Smith & Zeichner, 2005). The Studying the Effectiveness of Teacher Education (SETE) project aims to address this gap by investigating the effectiveness of teacher education programs in preparing teachers for the variety of school settings in which they begin their careers. This three-year study utilises large-scale surveys and case studies, and includes a comprehensive mapping of teacher education programs across Australia. It tracks all 2010/2011 teacher education graduates in Queensland and Victoria to investigate the effectiveness of particular characteristics of their teacher education programs in equipping them with the capacity to meet the learning needs of young people in a diverse range of Australian school settings.

This paper presents the findings from the mapping exercise and the surveys of teachers and principals, and the problematics and possibilities of reading across the data sets. The SETE mapping exercise used publicly available online information to examine the characteristics of initial teacher education programs accredited by the Victorian Institute of Teaching (VIT) and the Queensland College of Teachers (QCT). Preliminary results address, inter alia, the length, content and delivery of programs and critical issues of the development of pedagogical and assessment expertise and preparation to teach in diverse contexts. The paper also presents findings from the first of a series of online surveys completed by teacher education graduates in Queensland and Victoria. Beginning teachers’ responses are mapped against key characteristics of participants' pre-service programs and framed in relation to the key themes of curriculum, pedagogy, assessment, behaviour management, and engagement with school stakeholders and local community.

The 'country' within : the challenges for landscape architecture to legitimatise its residency on terra nullius

The nexus between the landscape architecture profession and the Australian Indigenous communities about place and 'country' has been floundering despite recent events in history, including recognition of native title by the High Court in Mabo v the State of Queensland [No. 2] (1992) 175 CLR 1 that have heightened recognition of the rights, interests, needs and aspirations of Aboriginal and Torres Strait Islander people in Australia and internationally.

Contemporary and historic factors influence differently genetic differentiation and diversity in a tropical palm

Population genetics theory predicts loss in genetic variability because of drift and inbreeding in isolated plant populations; however, it has been argued that long-distance pollination and seed dispersal may be able to maintain gene flow, even in highly fragmented landscapes. We tested how historical effective population size, historical migration and contemporary landscape structure, such as forest cover, patch isolation and matrix resistance, affect genetic variability and differentiation of seedlings in a tropical palm (Euterpe edulis) in a human-modified rainforest. We sampled 16 sites within five landscapes in the Brazilian Atlantic forest and assessed genetic variability and differentiation using eight microsatellite loci. Using a model selection approach, none of the covariates explained the variation observed in inbreeding coefficients among populations. The variation in genetic diversity among sites was best explained by historical effective population size. Allelic richness was best explained by historical effective population size and matrix resistance, whereas genetic differentiation was explained by matrix resistance. Coalescence analysis revealed high historical migration between sites within landscapes and constant historical population sizes, showing that the genetic differentiation is most likely due to recent changes caused by habitat loss and fragmentation. Overall, recent landscape changes have a greater influence on among-population genetic variation than historical gene flow process. As immediate restoration actions in landscapes with low forest amount, the development of more permeable matrices to allow the movement of pollinators and seed dispersers may be an effective strategy to maintain microevolutionary processes.

Patch selection by wintering white-tailed deer : consequences for eastern hemlock regeneration at local and landscape scales

Tsuga canadensis (eastern hemlock) is a highly shade-tolerant, late-successional, and long-lived conifer species found throughout eastern North America. It is most often found in pure or nearly pure stands, because highly acidic and nutrient poor forest floor conditions are thought to favor T. canadensis regeneration while simultaneously limiting the establishment of some hardwood species with greater nutrient requirements. Once a common species, T. canadensis is currently experiencing widescale declines across its range. The hemlock woolly adelgid (Adelges tsugae) is decimating the population across its eastern distribution. Across the Upper Great Lakes region, where the adelgid is currently being held at bay by cold winter temperatures, T. canadensis has been experiencing failures in regeneration attributed, in part, to herbivory by white-tailed deer (Odocoileus virginianus). Deer utilize T. canadensis stands as winter habitat in areas of high snow depth. Tsuga canadensis, once a major component of these forests, currently exists at just a fraction of its pre-settlement abundance due to historic logging and contemporary forest management practices, and what remains is found in small remnant patches surrounded by second- and third-growth deciduous forests. The deer population across the region, however, is likely double that of pre-European settlement times. In this dissertation I explore the relationship between white-tailed deer use of T. canadensis as winter habitat and the effect this use is having on regeneration and forest succession. For this research I quantified stand composition and structure and abiotic variables of elevation and snow depth in 39 randomly selected T. canadensis stands from across the western Upper Peninsula of Michigan. I also quantified composition and the configuration of the landscapes surrounding these stands. I measured relative deer use of T. canadensis stands as pellet group piles deposited in each stand during each of three consecutive winters, 2005-06, 2006-07, and 2007-08. The results of this research suggest that deer use of T. canadensis stands as winter habitat is influenced primarily by snow depth, elevation, and the composition and configuration of the greater landscapes surrounding these stands. Specifically, stands with more heterogeneous landscapes surrounding them (i.e., a patchy mosaic of conifer, deciduous, and open cover) had higher relative deer use than stands surrounded by homogenous deciduous forest cover. Additionally, the intensity of use and the number of stands used was greater in years with higher average snow depth. Tsuga canadensis regeneration in these stands was negatively associated with deer use and Acer saccharum (sugar maple) basal area. Of the 39 stands, 17 and 22 stands had no T. canadensis regeneration in small and large sapling categories, respectively. Acer saccharum was the most common understory tree species, and the importance of A. saccharum in the understory (stems < 10 cm dbh) of the stands was positively associated with overstory A. saccharum dominance. Tsuga canadensis establishment was associated with high-decay coarse woody debris and moss, and deciduous leaf litter inputs in these stands may be limiting access to these important microsites. Furthermore, A. saccharum is more tolerant to the effects of deer herbivory than T. canadensis, giving A. saccharum a competitive advantage in stands being utilized as winter habitat by deer. My research suggests that limited microsite availability, in conjunction with deer herbivory, may be leading to an erosion in T. canadensis patch stability and an altered successional trajectory toward one of A. saccharum dominance, an alternately stable climax species.

Keweenaw National Historical Park: Heritage Partnerships in an Industrial Landscape

This dissertation examines the genesis and development of Keweenaw National Historical Park in Michigan's Upper Peninsula. After the decline of a once-thriving copper mining industry, local residents pursued the creation of a national park as a way to encourage economic development, revitalize their community, and preserve their historic resources. Although they were ultimately successful in creating a national park, the park that was established was not the park that they envisioned. Over the next twenty years, the National Park Service, the park's federal Advisory Commission, and the communities on the Keweenaw Peninsula struggled to align unrealistic expectations with the actual capabilities and limitations of the park. The first chapter of this dissertation includes a short history of the decline of the copper industry in and around the village of Calumet, Michigan. This chapter also includes a discussion about the techniques and challenges of preserving and interpreting industrial heritage. Chapters 2 and 3 cover the events from the initial park proposal, to the expansion of the original idea, to the establishment of the park. Chapter 4 includes an examination of the enabling legislation and a discussion about the opportunities and challenges it provided. Chapters 5 through 8 cover the tenure of each of the four NPS superintendents as they navigated the complexities presented by a park model that was part partnership park and part traditional national park. Chapter 9 includes some key lessons, an assessment of the park's success, and some considerations for the future. In particular, Chapter 9 argues for an increased focus on the partnership aspects of the park, a reduction in the perceived scope of responsibilities, and a renewed effort to rally the existing partners in pursuing additional philanthropic support for the overall park.