A survey of the coverage, use and application of ancient woodland indicator lists in the UK

This report presents the results of a survey into the current use of ancient woodland indicator species lists in the UK. The idea of using species particularly vascular plants as indicators of ancient woodlands can be dated back to the 1970s and the work of Peterken. Since then a wide number of lists of Ancient Woodland Indicators (AWIs)have been produced, some based on expert opinions, some utilising field surveys, others adapted from existing lists. Recently developed lists, e.g. the lists for Scotland, Wales and Northern Ireland have been based on either robust reviews of existing lists, and/or expert opinion and/or field surveys and statistical analysis. Concerns however have been expressed regarding the use of lists and these concerns appear to be supported by the uncritical use of indicator species in recent planning inquiries, e.g. not recognising that indicators are indicators and considering them to be the key value of a woodland. A survey was undertaken of relevant individuals working in biological record centres, local authorities and key agencies across the UK. The survey sought to identify what lists of Ancient Woodland Indicators are currently in use, where possible to determine the methods used in developing these lists. The survey also sought to assess the awareness of ancient woodland indicator lists and review the ways in which these were used. A total of 419 questionnaires were sent out; a response rate of 11% was obtained. Follow up phone conversations were held with key individuals involved in developing ancient woodland indicator lists. Responses were received from all counties excluding: Buckinghamshire, Cheshire, Essex, Huntingdonshire, Middlesex, Northamptonshire, Staffordshire, Wiltshire and Worcestershire. In addition, the Lancashire respondent stated there was no AWI list for Lancashire. The key findings of the survey were: • There is a wide variety of lists of Ancient Woodland Indicators lists available covering most of the UK. • Most individuals using indicator lists are unaware of the methods used to produce the lists and therefore of their robustness. Some key stakeholders are unaware of the existence of indicator lists in their area. • Attitudes to ancient woodland indicator lists are variable, as is their use. • Few lists use species thresholds or weightings in determining whether a site is ancient, several lists are currently under review. • There are over 200 species listed on the various Ancient Woodland Indicators lists, few species are common to more than a quarter of the lists

Field surveys for ancient woodlands: Issues and Approaches

Field surveys of ancient woodlands and potential ancient woodlands can be undertaken for a variety of purposes, including: to help identify an Ancient Woodland, investigation into existing designated ancient woodlands, gathering information for site management and conservation decision making, assessing potential impacts of development, and making decisions on restoration etc. There is a variety of features in a woodland which can indicate whether it is an ancient woodland and can inform on the history and current ecological/historical value of the site. Many surveys of potential ancient woodlands have tended to focus on ancient woodland indicator species (AWIs), particularly Ancient Woodland Vascular Plants (AWVPs). Surveys which just focus on such indicators miss a lot of historical, archaeological and species information which can help confirm woodland continuity (i.e. that it is an ancient woodland) and/or identify features of historical and conservation value. There is a wide range of field survey techniques which can be used in ancient woodlands and a need to bring together the archaeological and ecological surveys in a single guide, hence this document. There are three broad types of feature to look for in an ancient woodland: • Ancient woodland vascular plant indicators; • Tree shape and form; and • Surface and buried archaeology. This report sets out survey methods for these features and advises on what to look for. Many important ecological and archaeological features can only be easily found at specific times of the year and surveying these features requires specific technical expertise and experience. Where surveys are undertaken outside the optimal period of time and/or are undertaken by individuals without the appropriate training and surveying expertise, the results should be treated with caution. Ideally several types of surveys of a woodland should be undertaken at different times of year to maximise the evidence collected and the robustness of this evidence. Where this is not possible, limitations in the surveys need to be stated and recognised in any analysis. In most cases field surveys should be combined with archive surveys (of site history, previous surveys etc.); this is particularly important when identifying ancient woodlands

The identification of ancient woodland: demonstrating antiquity and continuity - issues and approaches

This report presents an overview of the various types of evidence which can be used to determine whether a woodland site is likely to be designated as ‘ancient’ and discusses how these can be used as part of the decision making process. It has been commissioned by the Woodland Trust as part of their work promoting the value of ancient woodlands and getting the importance of such sites recognised through the planning process. An ancient woodland is defined as a woodland which has been continuously wooded from before 1600 AD. The evidence used to determine whether a site is ancient woodland is therefore: • evidence which indicates the continuity of woodland cover at a site from before 1600. • evidence which indicates that woodland was established post-1600 on a site. • evidence of a gap in woodland cover and the presence of other land uses, e.g. farmland, at that site since 1600. The robustness of the evidence sources varies, modern sources are often more robust and easier to verify but only demonstrate woodland cover in recent times. Care needs to be taken with all sources in their interpretation and use. Guidance has been provided regarding some of the potential limitations of the various types of evidence and recommendations have been made. General recommendations when seeking to identify/confirm an ancient woodland: • Ideally multiple sources of evidence should be obtained. • The reliability of the evidence used should be considered in the analysis. • A wide range of evidence sources should be consulted. • It needs to be recognised that absence of reference to a woodland on a map or in a document is not necessarily evidence of the absence of a woodland at that site. • In looking for evidence to determine whether a site is an ancient woodland it is as important to look for evidence that there was another land use at this site (i.e. evidence of a gap in woodland cover as shown by farmland on a map) as it is to look for evidence that there has been a continuity of woodland cover. • Field based evidence should normally be used to support map and archive evidence. However, ancient woodland plants can aid in ascribing antiquity where archive evidence alone is insufficient. • The evidence used to support the designation of a woodland as ancient or not needs to be clearly stated. As indicated previously, evaluation of the historical and other evidence for a site being an ancient woodland or not is a matter of judgement. Much of the evidence used is historic and not scientific, yet a rigorous scientific approach needs to be taken in determining the status of a possible ancient woodland site. It is recommended that in the near future further investigations into developing a more rigorous method for identifying and verifying the status of a site as an ancient woodland should be investigated. It is also recommended that the statutory agencies consider the development of detailed advice to consultants, planners and other workers involved in decisions relation to identify or potential ancient woodlands. It is hoped that this document may aid in this development

Characteristics and drivers of high-altitude ladybird flight: insights from vertical-looking entomological radar

Understanding the characteristics and drivers of dispersal is crucial for predicting population dynamics, particularly in range-shifting species. Studying long-distance dispersal in insects is challenging, but recent advances in entomological radar offer unique insights. We analysed 10 years of radar data collected at Rothamsted Research, U.K., to investigate characteristics (altitude, speed, seasonal and annual trends) and drivers (aphid abundance, air temperature, wind speed and rainfall) of high-altitude flight of the two most abundant U.K. ladybird species (native Coccinella septempunctata and invasive Harmonia axyridis). These species cannot be distinguished in the radar data since their reflectivity signals overlap, and they were therefore analysed together. However, their signals do not overlap with other, abundant insects so we are confident they constitute the overwhelming majority of the analysed data. The target species were detected up to ~1100 m above ground level, where displacement speeds of up to ~60 km/h were recorded, however most ladybirds were found between ~150 and 500 m, and had a mean displacement of 30 km/h. Average flight time was estimated, using tethered flight experiments, to be 36.5 minutes, but flights of up to two hours were observed. Ladybirds are therefore potentially able to travel 18 km in a "typical" high-altitude flight, but up to 120 km if flying at higher altitudes, indicating a high capacity for long-distance dispersal. There were strong seasonal trends in ladybird abundance, with peaks corresponding to the highest temperatures of mid-summer, and warm air temperature was the key driver of ladybird flight. Climatic warming may therefore increase the potential for long-distance dispersal in these species. Low aphid abundance was a second significant factor, highlighting the important role of aphid population dynamics in ladybird dispersal. This research illustrates the utility of radar for studying high-altitude insect flight and has important implications for predicting long-distance dispersal. © 2013 Jeffries et al

Theorising Disability: Beyond Common Sense

This article seeks to introduce the topic of disability to political theory via a discussion of some of the literature produced by disability theorists. The author argues that these more radical approaches conceptualise disability in ways that conflict with ‘common-sense’ notions of disability that tend to underpin political theoretical considerations of the topic. Furthermore, the author suggests that these more radical conceptualisations have profound implications for current debates on social justice, equality and citizenship that highlight the extent to which these notions are also currently underpinned by ‘common-sense’ notions of ‘normality’

Accelerated in vivo proliferation of memory phenotype CD4+ T-cells in human HIV-1 infection irrespective of viral chemokine co-receptor tropism.

CD4(+) T-cell loss is the hallmark of HIV-1 infection. CD4 counts fall more rapidly in advanced disease when CCR5-tropic viral strains tend to be replaced by X4-tropic viruses. We hypothesized: (i) that the early dominance of CCR5-tropic viruses results from faster turnover rates of CCR5(+) cells, and (ii) that X4-tropic strains exert greater pathogenicity by preferentially increasing turnover rates within the CXCR4(+) compartment. To test these hypotheses we measured in vivo turnover rates of CD4(+) T-cell subpopulations sorted by chemokine receptor expression, using in vivo deuterium-glucose labeling. Deuterium enrichment was modeled to derive in vivo proliferation (p) and disappearance (d*) rates which were related to viral tropism data. 13 healthy controls and 13 treatment-naive HIV-1-infected subjects (CD4 143-569 cells/ul) participated. CCR5-expression defined a CD4(+) subpopulation of predominantly CD45R0(+) memory cells with accelerated in vivo proliferation (p = 2.50 vs 1.60%/d, CCR5(+) vs CCR5(-); healthy controls; P<0.01). Conversely, CXCR4 expression defined CD4(+) T-cells (predominantly CD45RA(+) naive cells) with low turnover rates. The dominant effect of HIV infection was accelerated turnover of CCR5(+)CD45R0(+)CD4(+) memory T-cells (p = 5.16 vs 2.50%/d, HIV vs controls; P<0.05), naïve cells being relatively unaffected. Similar patterns were observed whether the dominant circulating HIV-1 strain was R5-tropic (n = 9) or X4-tropic (n = 4). Although numbers were small, X4-tropic viruses did not appear to specifically drive turnover of CXCR4-expressing cells (p = 0.54 vs 0.72 vs 0.44%/d in control, R5-tropic, and X4-tropic groups respectively). Our data are most consistent with models in which CD4(+) T-cell loss is primarily driven by non-specific immune activation

'Caught Between a Rock and a Hard Place': Anti-discrimination Legislation in the Liberal State and the Fate of the Australian Disability Discrimination Act

This article offers a critical analysis of some of the practical implications for disabled people of the Disability Discrimination Act of 1992. Specifically, it raises questions about politics and the role of the law as an instrument of social change?taking greater account of the interests of disabled people?on the one hand, and of the reliance of the social model of disability on a strategy based upon legal rights on the other. The article also suggests that the constraining effects of Australia's constitutional protections of rights and its federal system of government hinder the mildly progressive elements of the Disability Discrimination Act. To illustrate this, the paper employs empirical evidence to suggest that these effects have been exacerbated by the passage of the Human Rights Legislation Amendment Act in 1999

Trouble in Paradise - A disabled person's right to the satisfaction of a self-defined need:Some conceptual and practical problems

This paper questions the usefulness of the rights-based approach to ameliorating the social situation of disabled people in Britain and advances two criticisms. First, that rights and self-de? ned needs have been under-theorised by disability theorists to the extent that they have insuf? ciently appreciated the problems that these approaches pose. The paper suggests that rights to appropriate resources to satisfy self-de? ned needs will generate vast numbers of competing rights claims and that the resulting tendency of rights to con? ict has been under-appreciated. Secondly, that there has been little consideration of how these con? icts might be reconciled. The ? rst two sections of the paper look at the concepts of ascribed and self-de? ned needs, respectively, whilst the ? nal one looks at some of the problems of the rights approach and some of the dif? culties of making self-de? ned need the basis of rights claims

Construction and evaluation of novel rhesus monkey adenovirus vaccine vectors

Adenovirus vectors are widely used as vaccine candidates for a variety of pathogens, including HIV-1. To date, human and chimpanzee adenoviruses have been explored in detail as vaccine vectors. The phylogeny of human and chimpanzee adenoviruses is overlapping, and preexisting humoral and cellular immunity to both are exhibited in human populations worldwide. More distantly related adenoviruses may therefore offer advantages as vaccine vectors. Here we describe the primary isolation and vectorization of three novel adenoviruses from rhesus monkeys. The seroprevalence of these novel rhesus monkey adenovirus vectors was extremely low in sub-Saharan Africa human populations, and these vectors proved to have immunogenicity comparable to that of human and chimpanzee adenovirus vaccine vectors in mice. These rhesus monkey adenoviruses phylogenetically clustered with the poorly described adenovirus species G and robustly stimulated innate immune responses. These novel adenoviruses represent a new class of candidate vaccine vectors. IMPORTANCE Although there have been substantial efforts in the development of vaccine vectors from human and chimpanzee adenoviruses, far less is known about rhesus monkey adenoviruses. In this report, we describe the isolation and vectorization of three novel rhesus monkey adenoviruses. These vectors exhibit virologic and immunologic characteristics that make them attractive as potential candidate vaccine vectors for both HIV-1 and other pathogens