105 research outputs found
AN INVESTIGATION OF SOIL WATER MOVEMENT ON DRAINED AND UNDRAINED CLAY GRASSLAND IN SOUTH WEST ENGLAND
The Rowden Moor experimental site (A.F.R.C. I.G.E.R., North Wyke) provided an opportunity to
characterise discharge regimes, elucidate runoff generation mechanisms and to consider
implications for solute movement under natural and drained conditions. Research was conducted
on a heavy clay grassland soil in an area of high rainfall (1053 mm a ˉ¹) in South West England. A
combined hydrometric and tensiometric study was undertaken within a nested experimental
design (1 m² to 1 ha) on one undrained and one drained site throughout a drainage season
(October to March).
Results at the hectare scale demonstrated that drainage did not substantially alter the volume of
field runoff ( ~ 400 mm) but did change the dominant flowpaths. Drainage diverted water from
surface/near surface routes to depth so that drain storm runoff was lagged by some 30 minutes
over undrained site discharge. The drained site also exhibited a more peaky regime, with a
maximum daily discharge of 45 mm being almost twice that for the undrained field.
At the field and plot scale, the significance of macropore flow was noted. To investigate this in
more detail, a tracer experiment was performed on an isolated soil block which had been mole
drained and so had enhanced macroporosity. Macropore flow was generated under unsaturated
conditions (little matric potential response and no water table was identified). Stable oxygen
concentrations were δ18O +3.5 and -5.8 in tracer and background water respectively. Drainflow
indicated that there was rapid interaction between applied tracer and soil water (peak flow δ18O
-1.1). Thus, the matrix-macropore interface was not a boundary between two separate domains of
old and new water, high and low conductivity but a site of rapid interchange and mixing.
Temporal variability of soil status and malric water composition, also indicated that limited areas
of the matrix were capable of transmitting rapid flow. It became clear that even in a heavy clay
soil such as that found at Rowden, where macropore flow was promoted by drainage operations,
the matrix still had an important role to play. On the basis of potential, soil moisture and
observation of tracers, it is proposed that discrete (finger-like) volumes of the matrix are capable
of rapid water transmission. Although it was frequently impossible to relate moisture content and
soil water potential because instrumentation monitored different volumes of soil, hysteretic soil
moisture behaviour over the drainage season was evident in both data sets.
This study confirmed the importance of rapid subsurface runoff generation mechanisms on
drained soils, but noted that discontinuous translatory flow in the matrix and macropore flow
occurred and that the two ‘domains’ were inextricably linked. Further work should be undertaken
at the detailed scale to elucidate the soil characteristics which promote rapid runoff mechanisms
and the consequences for water quality, especially where the soil subsurface represents a major
reservoir (e.g. nitrates).A.F.R.C. Institute of Grassland and Environmental Research, North Wyk
Domestic ivory trade: the supply chain for raw ivory in Thailand is driven by the financial needs of elephant owners and market factors
The ivory trade is of global interest due to its impacts on elephant conservation. Thailand permits the domestic trade of ivory from domesticated elephants. Knowledge of the supply chain is important for managing this market in order to achieve sustainable benefits for both wildlife conservation and human livelihoods. We interviewed elephant owners and ivory manufacturers to conduct an analysis of the Thai ivory supply chain. Five key actor groups operate in this supply chain: elephant owners, intermediaries, manufacturers, retailers, and ivory consumers. Factors influencing the supply of raw ivory vary with harvesting, use, and sale destination but the financial needs of elephant owners and market factors are particularly influential. Elephant owner decisions also depend on elephant management, sentimental values, ivory beliefs, tusk forms, and legal awareness. These findings have the potential to inform the design of monitoring the Thai ivory market
Multiple co-benefits of Indigenous land and sea management programs across northern Australia: final report
Our aim is to generate information that can be used to help design, monitor, and/or select ILSMPs to help meet the goals of key stakeholders. We focus on goals above and beyond environmental goals – i.e. those that can be considered to be co-benefits. These diverse goals include seeking to enhance individual wellbeing, help communities meet their aspirations, support the development of Indigenous businesses and/or promote regional economic development. When determining what an ‘Indigenous land and sea management program’ is, we visualise a Venn diagram with intersecting sets.
• Set one: There are innumerable traditional Indigenous land and sea management activities or practices that have been going on for tens of thousands of years – these include, but are not limited to getting out on country, looking after waterholes, hunting and burning (Section 2.1.1).
• Set two: Government and non-government organisations fund a variety of different programs, some of which support Indigenous people and some of which support land management (Section 2.1.2). Not all land mangagement programs facilitate Indigenous practices, and not all Indigenous programs facilitate land management.
For the purposes of this project, we focus on the intersection of those two sets, defining an ILSMP as a program that funds or supports traditional Indigenous land management activities
Using measures of wellbeing for impact evaluation: proof of concept developed with an Indigenous community undertaking land management programs in northern Australia
Combining insights from literature on the Theory of Change, Impact Evaluation, and Wellbeing, we develop a novel approach to assessing impacts. Intended beneficiaries identify and rate factors that are important to their wellbeing, their satisfaction with those factors now, and before an intervention. Qualitative responses to questions about perceived changes and causes of change are linked to quantitative data to draw inferences about the existence and/or importance of impact(s). We use data from 67 Ewamian people, in a case study relating to Indigenous land management, to provide proof of concept. 'Knowing that country is being looked after' and 'Having legal right/access to the country' were identified as important to wellbeing, with perceptions that Native Title determination, declared Indigenous Protected Area and associated land management programs have had a significant and positive impact on them. Further method testing might determine the utility of this approach in a wide range of settings
An Unusual Presentation of Endocarditis Caused by Staphylococcus warneri
Staphylococcus warneri does not generally cause serious infections in humans. We report a case of endocarditis in a healthy individual with no known past medical history. S. warneri was identified in her blood cultures and echocardiographic evidence confirmed the diagnosis of bacterial endocarditis. There was no apparent cause for her infection, and risk factors such as invasive treatment or medical implant were not present. This rare clinical presentation illustrates the importance of not overlooking low virulence species of Staphylococcus, as they can potentially serve as opportunistic etiological agents for endocarditis, especially among the elderly population
A cross-sectional study examining the nature and extent of interprofessional education in schools of pharmacy in the United Kingdom.
Interprofessional education can prepare the workforce for collaborative practice in complex health and social care systems. The aim of this study was to examine the nature and extent of interprofessional education in schools of pharmacy in the United Kingdom. An online questionnaire was developed using systems theory, published literature and input from an interprofessional expert panel. It included closed and open-ended questions and a demographic section. Following piloting, it was distributed to 31 schools of pharmacy. Descriptive statistics were used for quantitative data, a content analysis approach for qualitative data. Ten schools of pharmacy responded. All reported delivering compulsory interprofessional education. Most (80%) reported an interprofessional steering group overseeing development. Formative and/or summative assessment varied depending on year of study. Mechanism and purpose of evaluation varied, with respondents reporting Kirkpatrick Evaluation Model Levels 1-3 (100%;80%;70%). Two themes were identified: "Variation in Interprofessional Education Approaches and Opportunities" and "Factors Influencing Development and Implementation of Interprofessional Education". Formal teaching was mainly integrated into other modules; various pedagogic approaches and topics were used for campus-based activities. Respondents referred to planned interprofessional education during practice-based placements; some still at pilot stage. Overall, respondents agreed that practice-based placements offered opportunistic interprofessional education, but a more focused approach is needed to maximise student pharmacists' learning potential. Most interprofessional education offered in undergraduate pharmacy curricula in the United Kingdom is campus-based, the nature and extent of which varies between programmes. Very few examples of practice-based activities were reported. Results may inform future interprofessional education curricular developmen
Are Indigenous land and sea management programs a pathway to Indigenous economic independence?
This paper focuses on Indigenous business development, an under-researched co-benefit associated with investment in Indigenous land and sea management programs (ILSMPs) in northern Australia. More than 65% of ILSMPs undertake commercial activities that generate revenue and create jobs. In addition to generating environmental benefits, ILSMPs thus also generate economic benefits (co-benefits) that support Indigenous aspirations and help to deliver multiple government objectives. We outline key features of northern Australian economies, identifying factors that differentiate them from Western urbanised economies. We discuss literature highlighting that, if the aim is to stimulate (short-term) economic development in northern Indigenous economies, then the requirement is to stimulate demand for goods and services that are produced by Aboriginal and Torres Strait Islander people (herein referred to as Indigenous people), and which generate benefits that align with the goals and aspirations of Indigenous people. We also discuss literature demonstrating the importance of promoting a socio-cultural environment that stimulates creativity, which is a core driver of innovation, business development and long-term development.
ILSMPs have characteristics suggestive of an ability to kick-start self-sustaining growth cycles, but previous research has not investigated this. Using 8 years of data relating to Indigenous businesses that are registered with the Office of the Registrar of Indigenous Corporations (a subset of all Indigenous businesses), we use statistical tests (Granger causality tests) to check whether ILSMP expenditure in the first year has a positive impact on Indigenous business activity in subsequent years. This analysis (of admittedly imperfect data) produces evidence to support the proposition that expenditure on ILSMPs generates positive spillovers for Indigenous businesses (even those not engaged in land management), albeit with a 3-year lag. ILSMPs have been shown to be an appropriate mechanism for achieving a wide range of short-term benefits; our research suggests they may also work as catalysts for Indigenous business development, fostering sustainable economic independence
Shining NIR light on ivory: a practical enforcement tool for elephant ivory identification
The elephant ivory trade remains controversial because of concerns about the extinction risk of elephants and the different needs of CITES member states. Thailand's situation is particularly contentious because of the different legal status among types of elephant ivory. Thai law allows the local sale of ivory from domesticated Asian elephants, which creates challenges for Thai enforcement officers in identification of ivory provenance. We investigated the capacity of non-destructive Near Infrared (NIR) spectroscopy (600–1700 nm), combined with Partial Least Squares Discriminant Analysis (PLS-DA), to discriminate between ivory from African, wild Asian and domesticated Asian elephants. Ivory spectra of 64 elephants were divided randomly into calibration and validation datasets. We were able to determine elephant ivory provenance at both the interspecies (African and Asian elephant ivory), and within species (wild and domesticated Asian elephant ivory) classifications with 100% accuracy. These results showed the potential use of handheld NIR spectrometers for rapid assessments of ivory provenance, as well as a forensic tool for wider enforcement
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