347 research outputs found
Supplemental Material - Systematic Review of GIS and Remote Sensing Applications for Assessing the Socioeconomic Impacts of Mining
No full textSupplemental Material for Systematic Review of GIS and Remote Sensing Applications for Assessing the Socioeconomic Impacts of Mining by Michelle Li Ern Ang, John R. Owen, Christopher N. Gibbins, Éléonore Lèbre, Deanna Kemp, Muhamad R. U. Saputra, Jo-Anne Everingham, and Alex M. Lechner in The Journal of Environment & Development</p
Selective logging causes the decline of large-sized mammals including those in unlogged patches surrounded by logged and agricultural areas
No full textLegal and illegal logging is prevalent throughout the tropics, impacting on natural habitat and wildlife. This study aimed to investigate the sensitivity of forest mammals to selective logging in the lowland dipterocarp forests of South-West Peninsular Malaysia and identify the underlying factors that determine species occurrence. A total of 120 camera trap locations were deployed within selectively logged and unlogged forests. We found that unlogged forest had greater wildlife occurrences compared to selectively logged forests, including two endangered mammal species not found in logged forest. Forest vegetation structure characteristics such as the abundance of lianas, large trees, saplings, palms, bamboo and seedlings were associated with mammal species richness. Mammal species richness increased with number of forest trees, particularly those with a DBH of >45 cm, but this was limited to high altitude forest. Worryingly, we did not detect any large mammalian apex predators such as leopards or tigers in either unlogged or selectively logged forests. The absence of these animals may be the result of poaching, habitat degradation or other pressures; these mammals are expected to be present in intact forests in Peninsular Malaysia. Restoring logged forests and preserving the remaining unlogged lowland dipterocarp forests are critically important to safeguard mammalian biodiversity in the region. Besides that, we recommend that conventional logging practices are replaced with reduced impact logging methods
Urban forest fragmentation impoverishes native mammalian biodiversity in the tropics
No full textUrban expansion has caused major deforestation and forest fragmentation in the tropics. The impacts of habitat fragmentation on biodiversity are understudied in urban forest patches, especially in the tropics and little is known on the conservation value of the patches for maintaining mammalian biodiversity. In this study, camera trapping was used to determine the species composition and species richness of medium- and large-sized mammals in three urban forest patches and a contiguous forest in Peninsular Malaysia. We identified the key vegetation attributes that predicted mammal species richness and occurrence of herbivores and omnivores in urban forest patches. A total number of 19 mammal species from 120 sampling points were recorded. Contiguous forest had the highest number of species compared to the urban forest patches. Sunda Pangolin and Asian Tapir were the only conservation priority species recorded in the urban forest patches and contiguous forest, respectively. Top predators such as Malayan Tiger and Melanistic Leopard were completely absent from the forest patches as well as the contiguous forest. This was reflected by the abundance of wild boars. We found that mammal species richness increased with the number of trees with DBH less than 5\ua0cm, trees with DBH more than 50\ua0cm, and dead standing trees. In the future, the remaining mammal species in the urban forest patches are expected to be locally extinct as connecting the urban forest patches may be infeasible due to land scarcity. Hence, to maintain the ecological integrity of urban forest patches, we recommend that stakeholders take intervention measures such as reintroduction of selected species and restocking of wild populations in the urban forest patches to regenerate the forest ecosystems
Perceived contributions of multifunctional landscapes to human well‐being: evidence from 13 European sites
No full textMultifunctional landscapes provide critical benefits and are essential for human well‐being. The relationship between multifunctional landscapes and well‐being has mostly been studied using ecosystem services as a linkage. However, there is a challenge of concretizing what human well‐being exactly is and how it can be measured, particularly in relation to ecosystem services, landscape values and related discussions. In this paper, we measure self‐reported well‐being through applying an inductive free‐listing approach to the exploration of the relationships between landscape multifunctionality and human well‐being across 13 rural and peri‐urban sites in Europe. We developed a face‐to‐face online survey (n = 2,301 respondents) integrating subjective perceptions of well‐being (free‐listing method) with mapping perceived ecosystem service benefits (Public Participation GIS, PPGIS approach). Applying content analysis and diverse statistical methods, we explore the links between well‐being (i.e. perceived well‐being items such as tranquillity, social relations and health) and social‐ecological properties (i.e. respondents' sociocultural characteristics and perception of ecosystem service benefits). We identify 40 different well‐being items highlighting prominently landscape values. The items form five distinct clusters: access to services; tranquillity and social capital; health and nature; cultural landscapes; and place attachment. Each cluster is related to specific study sites and explained by certain social‐ecological properties. Results of our inductive approach further specify pre‐defined conceptualizations on well‐being and their connections to the natural environment. Results suggest that the well‐being contributions of multifunctional landscapes are connected to therapeutic well‐being effects, which are largely neglected in the ecosystem services literature. Our results further point to the context‐specific character of linkages between landscapes and human well‐being. The clusters highlight that landscape‐supported well‐being is related to multiple interlinked items that can inform collective visions of well‐being in the future. For landscape planning and management, we highlight the need for place‐specific analysis and consideration of perceptions of local people to identify the contributions to their well‐being. Future research would benefit from considering the experiential qualities of value and well‐being as they relate to direct experiences with the landscape and wider psychological needs, specifically over time
Quantifying suspended solids in small rivers using satellite data
No full textThe management of suspended solids and associated contaminants in rivers requires knowledge of sediment sources. In-situ sampling can only describe the integrated impact of the upstream sources. Empirical models that use surface reflectance from satellite images to estimate total suspended solid (TSS) concentrations can be used to supplement measurements and provide spatially continuous maps. However, there are few examples, especially in narrow, shallow and hydrologically dynamic rivers found in mountainous areas. A case study of the Didipio catchment in Philippines was used to address these issues. Four 5-m resolution RapidEye images, from between the years 2014 and 2016, and near-simultaneous ground measurements of TSS concentrations were used to develop a power law model that approximates the relationship between TSS and reflectance for each of four spectral bands. A second dataset using two 2-m resolution Pleiades-1A and a third using a 6-m resolution SPOT-6 image along with ground-based measurements, were consistent with the model when using the red band data. Using that model, encompassing data from all three datasets, gave an R value of 65% and a root mean square error of 519mgL. A linear relationship between reflectance and TSS exists from 1mgL to approximately 500mgL. In contrast, for TSS measurements between 500mgL and 3580mgL reflectance increases at a generally lower and more variable rate. The results were not sensitive to changing the pixel location within the vicinity of the ground sampling location. The model was used to generate a continuous map of TSS concentration within the catchment. Further ground-based measurements including TSS concentrations that are higher than 3580mgL would allow the model to be developed and applied more confidently over the full relevant range of TSS
Ecosystem services mapping uncertainty assessment: a case study in the Fitzroy basin mining region
No full textEcosystem services mapping is becoming increasingly popular through the use of various readily available mapping tools, however, uncertainties in assessment outputs are commonly ignored. Uncertainties from different sources have the potential to lower the accuracy of mapping outputs and reduce their reliability for decision-making. Using a case study in an Australian mining region, this paper assessed the impact of uncertainties on the modelling of the hydrological ecosystem service, water provision. Three types of uncertainty were modelled using multiple uncertainty scenarios: (1) spatial data sources; (2) modelling scales (temporal and spatial) and (3) parameterization and model selection. We found that the mapping scales can induce significant changes to the spatial pattern of outputs and annual totals of water provision. In addition, differences in parameterization using differing sources from the literature also led to obvious differences in base flow. However, the impact of each uncertainty associated with differences in spatial data sources were not so great. The results of this study demonstrate the importance of uncertainty assessment and highlight that any conclusions drawn from ecosystem services mapping, such as the impacts of mining, are likely to also be a property of the uncertainty in ecosystem services mapping methods
Reliability of map accuracy assessments: a reply to Roff et al. (2016)
No full textRoff et al. (Ecological Management and Restoration, 17, 2016, 000) provide a discussion of the criteria expected for the best approach to validation of mapping programs and uses Hunter (Ecological Management & Restoration 17, 2016, 40) to highlight issues involved. While we support the general principles outlined, we note that the review does not apply the same standards to Sivertsen et al. (Greater Hunter Native Vegetation Mapping Geodatabase Guide (Version 4.0). Office of Environment and Heritage, Department of the Premier and Cabinet, Sydney, Australia, 2011), the original document critiqued by Hunter (Ecological Management & Restoration 17, 2016, 40). The Hunter (Ecological Management & Restoration 17, 2016, 40) validation was based on a larger sample size, greater sampling within mapping units and greater representation of landscapes than Sivertsen et al. (Greater Hunter Native Vegetation Mapping Geodatabase Guide (Version 4.0). Office of Environment and Heritage, Department of the Premier and Cabinet, Sydney, Australia, 2011). Survey and validation sites being placed along public roads and lands are common to both the general Office of Environment and Heritage (OEH) and Hunter (Ecological Management & Restoration 17, 2016, 40) validation methodologies. Thus, the criticisms of Roff et al. (Ecological Management and Restoration, 17, 2016, 000) of the Hunter (Ecological Management & Restoration 17, 2016, 40) approach apply equally, if not more, to Sivertsen et al. (Greater Hunter Native Vegetation Mapping Geodatabase Guide (Version 4.0). Office of Environment and Heritage, Department of the Premier and Cabinet, Sydney, Australia, 2011). We outline in the article how the Roff et al. (Ecological Management and Restoration, 17, 2016, 000) critique was selective and in some cases incorrect in its analysis of issues presented in Hunter (Ecological Management & Restoration 17, 2016, 40) and did not apply the same criteria to their own work. We conclude by discussing future directions for validating and mapping vegetation communities
A multiscale, hierarchical, ecoregional and floristic classification of arid and semi-arid ephemeral wetlands in New South Wales, Australia
No full textDescribing, classifying and quantifying vegetation communities is fundamental for understanding their current distribution, rarity, interrelationships and ecosystem functions. In the present study, we apply a consistent objective classification system for ephemeral wetlands of arid and semi-arid areas of New South Wales (NSW), Australia. Our approach uses a two-step statistically based, hierarchical, multiscale classification of environmental data at broad scales and floristics data at intermediate scales. At broad scales, ecoregionalisation methods were used to describe three wetland macrogroups. Within these groups, we performed unsupervised analyses of 640 floristic survey plots using the Bray-Curtis algorithm, clustering by group averaging and testing of clusters using similarity profile analysis (SIMPROF). From this we delineated 18 vegetation groups with class definition based on a combination of diagnostic and non-diagnostic similarity percentage analysis (SIMPER) outputs and dominant taxa. We show that a consistent classification system can be effectively created for subsets of vegetation that have adequate plot data within a general matrix that is poorly sampled if outputs are restricted to appropriate scales of resolution. We suggest that our approach provides a stable and robust classification system that can be added to as more data become available
Genetic risk and a primary role for cell-mediated immune mechanisms in multiple sclerosis
No full textMultiple sclerosis is a common disease of the central nervous system in which the interplay between inflammatory and neurodegenerative processes typically results in intermittent neurological disturbance followed by progressive accumulation of disability. Epidemiological studies have shown that genetic factors are primarily responsible for the substantially increased frequency of the disease seen in the relatives of affected individuals, and systematic attempts to identify linkage in multiplex families have confirmed that variation within the major histocompatibility complex (MHC) exerts the greatest individual effect on risk. Modestly powered genome-wide association studies (GWAS) have enabled more than 20 additional risk loci to be identified and have shown that multiple variants exerting modest individual effects have a key role in disease susceptibility. Most of the genetic architecture underlying susceptibility to the disease remains to be defined and is anticipated to require the analysis of sample sizes that are beyond the numbers currently available to individual research groups. In a collaborative GWAS involving 9,772 cases of European descent collected by 23 research groups working in 15 different countries, we have replicated almost all of the previously suggested associations and identified at least a further 29 novel susceptibility loci. Within the MHC we have refined the identity of the HLA-DRB1 risk alleles and confirmed that variation in the HLA-A gene underlies the independent protective effect attributable to the class I region. Immunologically relevant genes are significantly overrepresented among those mapping close to the identified loci and particularly implicate T-helper-cell differentiation in the pathogenesis of multiple sclerosis
Meaningful lines : Social semiotic investigations of the graphical line, used as a connector in digital data visualizations
No full textThe paper III is not published yet.The dissertation investigates the graphical line, used as a connector in digital data visualizations (DVs), from a social semiotic perspective. It explores the semiotic functions of connecting lines in digital DVs, building empirically on two corpus analyses. These analyses are concerned with how two key semiotic functions are graphically realized in the selected lines and whether graphical conventions regulating these realizations can be identified.
In the dissertation the connecting line is researched as a central element of several different DV types – line graphs, timelines, route maps, connection maps, network diagrams, etc. Today, DVs are used in a broad range of social contexts and thus play an essential role in society. New digital technologies make it possible to apply other visual characteristics to graphical lines in DVs than was previously possible, for example, when they were hand-drawn or printed. This change may have influenced the DV design practice, a situation calling for updated research.
The dissertation is article-based, comprising three articles and an extended abstract. The extended abstract frames the three articles and includes an introduction, definitions of key terms, more comprehensive sections on the theoretical framework, earlier research and methodology, as well as ethical considerations, reflections on methodological decisions and a conclusion. The two overall research questions addressed in the dissertation are:
(1) What characterizes the graphical forms and semiotic functions of connecting lines in current, publicly available digital DVs?
(2) What conventions, regulating the relations between these forms and functions, can be observed in such DVs?publishedVersio
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