47 resultados para land suitability analysis


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Purpose – The paper critiques a range of theories and evaluates their ability to provide a lens for explaining the idiosyncratic nature of small firms and their e-business adoption decisions.

Design/methodology/approach
– This literature review firstly summarises the existing research evidence that shows that small firms are idiosyncratic when it comes to e-business adoption. It then critiques theories commonly used in the literature in this field to examine the extent to which they take this small firm idiosyncrasy into account when explaining e-business adoption decisions.

Findings
– The critical analysis shows that no commonly-used theory adequately explains small firm adoption of e-business because each omits important aspects of small firm idiosyncrasy. The analysis suggests that an integrated theoretical framework is needed. Preliminary ideas on this framework are provided.

Originality/value – Existing research generally applies a small number of selected theories and formulates research models of adoption factors. However, there is no systematic analysis of theories in this field and no consensus about theoretical frameworks. This paper addresses this limitation of the literature by critically evaluating the commonly used theories in terms of their individual suitability as lenses for explaining small firm e-business adoption.

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Fiji is a small island country in the South Pacific. Sugar is its oldest industry, being in the vanguard of economic growth and development for over a century. Today the oldest industry, not only in Fiji but also in the South Pacific Island countries, is shrivelling and is poised on the precipice of collapse. The literature to date has singled out expiring land leases and the inability of the government to resolve this issue as the key to the current calamity. This paper aims to estimate a sugarcane production model for Fiji, delineating the short-run and long-run determinants. It expands the Cobb-Douglas production function in specifying the sugarcane production model and uses time series data (1970-2000) in estimating it. The major findings are that area harvested and fertiliser (capital), labour force and prices paid to sugarcane farmers have made positive contributions to sugarcane production in both the short- and long-run. The finding on the statistical significance of area harvested has direct relevance to the current land problems in Fiji. It is envisaged that the results will appeal to Fijian policy makers and that a speedy solution to the problem of expiring and non-productive use of sugarcane land will be achieved.

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The taxation of aboriginal/native title payments gives rise to a number of complex and difficult legal and policy issues. Reform measures announced on 13 February 1998 by the then Federal Treasurer and Attorney-General did not address the possible capital gains tax (‘CGT’) implications and even those relating to ordinary income under s 6-5 Income Tax Assessment Act 1997 (Cth) remain unimplemented. The much anticipated Report of the Native Title Payments Working group (6 February 2009), while primarily focusing on non-taxation issues, also recognises the need for taxation reform and makes some recommendations in regard to such. Most recently, on 18 May the Assistant Treasurer, Senator Nick Sherry, the Minister for Families, Housing, Community Services and Indigenous Affairs, Jenny Macklin, and the Attorney General, Robert McClelland, announced the commencement of a national consultation on the tax treatment of native title, including the interaction of native title, Indigenous economic development and the tax system. The Assistant Treasurer recognised the need for “greater clarity and increased certainty for native title holders on how the tax system and native title interact.” At the same time, they released a paper entitled Native Title, Indigenous Economic Development and Tax to guide the national consultation. The proposed measures considered in the paper, including exempting Native title payments and/or creating a new tax exempt Indigenous Community Fund, provide a welcome step towards reform in this area. This article is part of a broader research project that explores the CGT implications of aboriginal/native title. While these provisions impact on both Indigenous traditional owners and relevant payers, such as mining companies, the focus in the project is particularly on the CGT implications for the traditional owners. This first part of the project examines the status of aboriginal/native title and incidental/ ancillary rights as CGT assets. The broader research project will then build on this analysis in the context of relevant CGT events. As the preliminary findings in this article evidence the CGT implications of aboriginal/native title are far from certain. The application of CGT to aboriginal/native title raises more issues than it answers. The key reason is that the current law is entirely unsuitable to communally held inalienable aboriginal/native title. Nevertheless, it will be seen that it is arguable that aboriginal/native title and/or incidental rights are post-CGT assets and acts in relation to such could trigger a CGT event with tax implications for the traditional owners. It will be suggested that these current tax provisions provide a very pertinent example where the law operates as a blunt tool that does not appropriately promote justice and reconciliation. To tax Indigenous communities as a result of acts that extinguish or impair their traditional ownership is incongruous. A specific provision(s) should be included in the capital gains provisions to ensure any such payments are exempt from taxation. This is not only fair given the history of uncompensated extinguishment of aboriginal title Australia, but also promotes the ability of Indigenous communities to optimise the financial benefits stemming from aboriginal/native title agreements.

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This paper investigates the use of using remotely sensed observation and full coverage hydroacoustic datasets to quantify habitat suitability for a marine demersal fish, the blue-throated wrasse. Because of issues surrounding the detection of species using remotely sensed video techniques, the application of presence-only techniques are well suited for modeling demersal fish habitat suitability. Ecological-Niche Factor Analysis is used to compare analyses conducted using seafloor variables derived from hydroacoustics at three spatial scales; fine (56.25 m2), medium (506.25 m2) and coarse (2756.25 m2), to determine which spatial scale was most influential in predicting blue-throated wrasse habitat suitability. The coarse scale model was found to have the best predictive capabilities with a Boyce Index of 0.80±0.26. The global marginality and specialization values indicated that, irrespective of spatial scale, blue-throated wrasse prefer seafloor characteristics that are different to the mean available within the study site, but exhibit a relatively wide niche. Although variable importance varied over the three spatial scale models, blue-throated wrasse showed a strong preference for regions of shallow water, close to reef, with high rugosity and maximum curvature and low HSI-B values. Generally the spatial patterns in habitat suitability were well represented in the Marine National Park compared to adjacent waters. However, some significant differences in spatial patterns were observed. Interspersion and Juxtaposition Indexes for unsuitable and highly suitable habitat were significantly smaller inside the Marine National Park, while the Mean Shape Index of unsuitable habitat in the Marine National Park was significantly larger.

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1.
Viggers & Hearn (2005) examined the encroachment of native herbivores on to farmland.
They presented kangaroo home range estimates and pasture biomass data for
three sites in south-eastern Australia, then made broad management recommendations
regarding the preservation of remnant habitat.
2.
While Viggers & Hearn identified potentially important patterns, we believe that
their data were neither sufficient nor appropriate to reveal the processes that underlie
these patterns.
3.
Specifically, their study was unreplicated at the land-use level, used inappropriate
density estimates for their study populations, failed to measure resources adequately,
used flawed methods of home range analysis, and demonstrated limited understanding
of key concepts and of their study species and thus could not draw valid conclusions.
4.
Synthesis and applications.
In view of these fundamental problems, we recommend
that decisions on the management of kangaroos

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Traditional regression techniques such as ordinary least squares (OLS) are often unable to accurately model spatially varying data and may ignore or hide local variations in model coefficients. A relatively new technique, geographically weighted regression (GWR) has been shown to greatly improve model performance compared to OLS in terms of higher R 2 and lower corrected Akaike information criterion (AICC). GWR models have the potential to improve reliabilities of the identified relationships by reducing spatial autocorrelations and by accounting for local variations and spatial non-stationarity between dependent and independent variables. In this study, GWR was used to examine the relationship between land cover, rainfall and surface water habitat in 149 sub-catchments in a predominately agricultural region covering 2.6 million ha in southeast Australia. The application of the GWR models revealed that the relationships between land cover, rainfall and surface water habitat display significant spatial non-stationarity. GWR showed improvements over analogous OLS models in terms of higher R 2 and lower AICC. The increased explanatory power of GWR was confirmed by the results of an approximate likelihood ratio test, which showed statistically significant improvements over analogous OLS models. The models suggest that the amount of surface water area in the landscape is related to anthropogenic drainage practices enhancing runoff to facilitate intensive agriculture and increased plantation forestry. However, with some key variables not present in our analysis, the strength of this relationship could not be qualified. GWR techniques have the potential to serve as a useful tool for environmental research and management across a broad range of scales for the investigation of spatially varying relationships.

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Human populations can cause serious damage to the natural environment. This, however, depends on the type of society and its size. Many traditional communities have a balanced relation with the environment, using practices for managing the soil, water and natural resources in order to satisfy their needs that are compatible to the general goals of environmental preservation.

The most usual approach to environmental conservation in the world sees human beings as intruders, potentially destroyers of the nature and, as a consequence, generally requires local population to be expelled from the protected regions. This situation has generated social conflicts because many protected areas, particularly in developing countries, are inhabited by indigenous or other traditional communities.

The disagreement about expelling or maintaining traditional communities in environmental conservation areas is strengthened by the lack of diagnostics on which changes are produced or suffered by communities in the region where they live. This paper presents a methodology developed to analyse land use dynamics in region with environmental conservation and traditional communities. We seek a better understanding of the way traditional communities use their space, the spatial pattern of land uses, which factors drive land use change, which impacts can be seen in those regions and identify the effects of conservation policies on land use dynamics.

The application of the method to the National Park of Superagui, Brazil, has successfully performed characterisation, analysis and simulation of land use dynamics in a region of environmental importance. Testing different scenarios has suggested that the adoption of a less restrictive policy for environmental conservation would have resulted in less social conflict with the same environmental efficiency than the established current policy.

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Despite decades of conservation efforts on the nesting beaches, the critical status of leatherback turtles shows that their survival predominantly depends on our ability to reduce at-sea mortality. Although areas where leatherbacks meet fisheries have been identified during the long distance movements between 2 consecutive nesting seasons, hot-spots of lethal interactions are still poorly defined within the nesting season, when individuals concentrate close to land. Here we report movements of satellite-tracked gravid leatherback turtles during the nesting season in Western Central Africa, South America and the Caribbean Sea, which account for about 70% of the world population. We show that during and at the end of the nesting season, leatherback turtles have the propensity to remain over the continental shelf, yet sometimes perform extended movements and may even nest in neighbouring countries. Leatherbacks exploit coastal commercial fishing grounds and face substantial accidental capture by regional coastal fisheries (e.g. at least 10% in French Guiana). This emphasises the need for regional conservation strategies to be developed at the ocean scale—both at sea and on land—to ensure the survival of the last leatherback turtles.

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 Resource availability is a limiting factor influencing the distribution and composition of faunal communities. Globally, hollow bearing trees are a resource required by wildlife at all trophic levels, and are used for a diverse range of ecological functions. In the northern hemisphere avian species act as primary hollow excavators, whereas the southern hemisphere must rely on complex interactions between stochastic events, and eventual decay. Hollow formation is therefore a slow process in the southern hemisphere. In contrast, hollow loss is quite rapid and influenced greatly by anthropogenic impacts.To identify the ecological characteristics driving hollows over an urban to forest gradient as a resource for the powerful owl (Ninox strenua) and its prey we used presence-only modelling. The potential for an area to support tree hollows suitable for powerful owls and their prey was linked to the density of ephemeral rivers, land cover, tree cover and distance from riparian vegetation. The potential for large hollows throughout the landscape, suitable for the powerful owl, was also influenced by density of permanent rivers. Potential habitat for tree hollows, capable of supporting powerful owls and their prey was greatest in forested environments, declining with increased urbanization. However the urban region still supported some smaller tree hollows suitable for arboreal marsupials. Managing for urban dwelling species, is not as simple as retaining old hollow producing trees or providing alternate nesting structures. We also need to mitigate increased mortality associated with built environments (e.g. electrocution, collisions).

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Conservation covenants and easements have become essential tools to secure biodiversity outcomes on private land, and to assist in meeting international protection targets. In Australia, the number and spatial area of conservation covenants has grown significantly in the past decade. Yet there has been little research or detailed policy analysis of conservation covenanting in Australia. We sought to determine how conservation covenanting agencies were measuring the biodiversity conservation outcomes achieved on covenanted properties, and factors inhibiting or contributing to measuring these outcomes. In addition, we also investigated the drivers and constraints associated with actually delivering the biodiversity outcomes, drawing on detailed input from covenanting programs. Although all conservation covenanting programs had the broad aim of maintaining or improving biodiversity in their covenants in the long term, the specific stated objectives of conservation covenanting programs varied. Programs undertook monitoring and evaluation in different ways and at different spatial and temporal scales. Thus, it was difficult to determine the extent Australian conservation covenanting agencies were measuring the biodiversity conservation outcomes achieved on covenanted properties on a national scale. Lack of time available to covenantors to undertake management was one of the biggest impediments to achieving biodiversity conservation outcomes. A lack of financial resources and human capital to monitor, knowing what to monitor, inconsistent monitoring methodologies, a lack of benchmark data, and length of time to achieve outcomes were all considered potential barriers to monitoring the biodiversity conservation outcomes of conservation covenants.

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Wildfires have major impacts on ecosystems globally. Fire regimes (including fire frequency, intensity, season and type of fire) influence the status of species by altering habitat suitability at the site scale, and by creating heterogeneity at the landscape scale. The relative effects of site and landscape-scale fire attributes on animal species are rarely examined together. Such knowledge is important, given that fire regimes are sensitive to changing land management practices; and that fires are predicted to become larger and more frequent in some regions as a result of climate change. Here, we tested the relative influence of elements of the fire regime (fire severity, fire history) at the site-scale, and the landscape context (extent of surrounding unburnt forest, fire heterogeneity) on the occurrence of native terrestrial mammals after severe wildfire in south-eastern Australia. We conducted surveys by using automatically triggered, infrared cameras at 80 sites in fire-prone eucalypt forests, 2-3. years post-wildfire. Thirteen native mammal species were recorded, eight of which were detected with sufficient frequency for analysis. Most species were widespread (35-90% of sites) and recorded in all fire severity classes. Fire effects at the site-level were more influential than landscape context effects arising from heterogeneity in the fire regime (e.g. extent of surrounding unburnt forest). Fire severity was the most influential of the fire-regime elements investigated, but it affected different species in different ways. This study highlights three main points relevant to conservation of terrestrial mammals after wildfire. First, spatial variation in fire severity associated with wildfire (ranging from unburned to severely burned stands) is an important contributor to the post-fire status of species. Second, post-fire environmental conditions are significant: here, rapid regeneration of vegetation following drought-breaking rains greatly influenced the suitability of post-fire habitats. Third, it is valuable to consider the effects of the fire regime at multiple scales, including both the site (forest stand) and its landscape context. Insights from short-term surveys, such as this, will be enhanced by complementary longitudinal studies, especially where they encompass environmental variation through the post-fire succession.

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Many development finance institutions have responded to calls for accountability for social and environmental harms associated with their lending by creating Independent Accountability Mechanisms (IAMs). We argue that IAMs can, at their best, provide relief for those concerned with the nature of the implementation of development projects, thereby addressing what we call immanent complaints about social and environmental impacts. However, IAMs are poorly placed to address what we call contestational grievances: those that entail a rejection of core tenets of the lending institution's development model. Such contestational grievances frequently arise when communities and their supporters reject the commodification of land and associated displacement of people and their livelihoods. Analysis draws on the International Finance Corporation Compliance-Advisor-Ombudsman (IFC CAO)'s handling of a complaint about the palm oil company Wilmar in Indonesia. We argue that because the CAO is institutionally embedded within the IFC, it shares its normative grounding with the institution it holds to account, and therefore risks organising and legitimating accountability failures related to contestational land-based grievances.

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The difficulty in teasing apart the effects of biological invasions from those of otheranthropogenic perturbations has hampered our understanding of the mechanismsunderpinning the global biodiversity crisis. The recent elaboration of global-scalemaps of cumulative human impacts provides a unique opportunity to assess howthe impact of invaders varies among areas exposed to different anthropogenicactivities. A recent meta-analysis has shown that the effects of invasive seaweeds onnative biota tend to be more negative in relatively pristine than in human-impactedenvironments. Here, we tested this hypothesis through the experimental removalof the invasive green seaweed, Caulerpa cylindracea, from rocky reefs across theMediterranean Sea. More specifically, we assessed which out of land-based andsea-based cumulative impact scores was a better predictor of the direction andmagnitude of the effects of this seaweed on extant and recovering native assemblages.Approximately 15 months after the start of the experiment, the removal ofC. cylindracea from extant assemblages enhanced the cover of canopy-formingmacroalgae at relatively pristine sites. This did not, however, result in major changesin total cover or species richness of native assemblages. Preventing C. cylindraceare-invasion of cleared plots at pristine sites promoted the recovery of canopyformingand encrusting macroalgae and hampered that of algal turfs, ultimatelyresulting in increased species richness. These effects weakened progressively withincreasing levels of land-based human impacts and, indeed, shifted in sign at theupper end of the gradient investigated. Thus, at sites exposed to intense disturbancefrom land-based human activities, the removal of C. cylindracea fostered the coverof algal turfs and decreased that of encrusting algae, with no net effect on speciesrichness. Our results suggests that competition from C. cylindracea is an importantdeterminant of benthic assemblage diversity in pristine environments, but less so inspecies-poor assemblages found at sites exposed to intense disturbance from landbasedhuman activities, where either adverse physical factors or lack of propagulesmay constrain the number of potential native colonizers. Implementing measures toreduce the establishment and spread of C. cylindracea in areas little impacted byland-based human activities should be considered a priority for preserving thebiodiversity of Mediterranean shallow rocky reefs.

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Objective: Despite the heterogeneity of Australian Aboriginal peoples, certain styles of relating are shared and are markedly different to the communication styles of non-Aboriginal peoples. These differences may affect the suitability of current investigative interview protocols to Australian Aboriginal children. This study aimed to qualitatively evaluate the applicability of an investigative interview protocol to Australian Aboriginal children and examine how it could be modified to better suit the communication styles in many Aboriginal communities. Method: A diverse group of 28 participants who had expertise in Aboriginal language and culture, as well as an understanding of the child investigative interview process, each partook in an in-depth semi-structured interview where they were prompted to reflect on Aboriginal language and culture with reference to a current interview protocol (in the context of sexual assault investigation). Results: Thematic analysis revealed overall support for the narrative-based structure of the interview protocol when eliciting information from Aboriginal children. A number of concerns were also identified, and these largely related to the syntax and vocabulary within the protocol, as well as the methods of questioning and building rapport with the child. Conclusions: Directions for future research and potential modifications to investigative interview protocols to better suit Aboriginal children are discussed.