92 research outputs found

    THE INVISIBLE MOATS OF THE MUN RIVER VALLEY, NE THAILAND: THE EXAMINATION OF WATER MANAGEMENT DEVICES AT MOUNDED SITES THROUGH GROUND PENETRATING RADAR (GPR)

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    The Mun River valley is well known for its moat-bound mounded archaeological sites that are usually associated with Iron Age occupation (~500BC- AD500).  The investigation of these sites has provided a wealth of information on the changing social and environmental conditions during prehistory.  In recent years, research has identified a greater diversity of site morphologies in the region, many of which, importantly, do not appear to have moats surrounding them.  This paper seeks to investigate whether the apparently ‘non-moated’ mound site of Non Klang (Nong Hua Raet village) was actually moated in the past, and if such, now in-filled features can be investigated through non-destructive Ground Penetrating Radar methodology.  Additionally, while large external moats can be observed in the modern day topography at sites such as Ban Non Wat, excavation has demonstrated that further, invisible, water management features exist beneath the surface within the current mound boundary of the site.  These are probably Iron Age precursors to the later more extensive and still visible moats.  This paper seeks to answer several fundamental questions: What application can GPR have at mounded sites in Southeast Asia?  Do invisible moats exist?  How will this affect our understanding of the broader prehistoric landscape in the Upper Mun River Valley? 

    HSV-1 Remodels Host Telomeres to Facilitate Viral Replication

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    SummaryTelomeres protect the ends of cellular chromosomes. We show here that infection with herpes simplex virus 1 (HSV-1) results in chromosomal structural aberrations at telomeres and the accumulation of telomere dysfunction-induced DNA damage foci (TIFs). At the molecular level, HSV-1 induces transcription of telomere repeat-containing RNA (TERRA), followed by the proteolytic degradation of the telomere protein TPP1 and loss of the telomere repeat DNA signal. The HSV-1-encoded E3 ubiquitin ligase ICP0 is required for TERRA transcription and facilitates TPP1 degradation. Small hairpin RNA (shRNA) depletion of TPP1 increases viral replication, indicating that TPP1 inhibits viral replication. Viral replication protein ICP8 forms foci that coincide with telomeric proteins, and ICP8-null virus failed to degrade telomere DNA signal. These findings suggest that HSV-1 reorganizes telomeres to form ICP8-associated prereplication foci and to promote viral genomic replication

    The microsporidian parasites Nosema ceranae and Nosema apis are widespread in honeybee (Apis mellifera) colonies across Scotland

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    Nosema ceranae is spreading into areas where Nosema apis already exists. N. ceranae has been reported to cause an asymptomatic infection that may lead, ultimately, to colony collapse. It is thought that there may be a temperature barrier to its infiltration into countries in colder climates. In this study, 71 colonies from Scottish Beekeeper’s Association members have been screened for the presence of N. apis and N. ceranae across Scotland. We find that only 11 of the 71 colonies tested positive for spores by microscopy. However, 70.4 % of colonies screened by PCR revealed the presence of both N. ceranae and N. apis, with only 4.2 or 7 % having either strain alone and 18.3 % being Nosema free. A range of geographically separated colonies testing positive for N. ceranae were sequenced to confirm their identity. All nine sequences confirmed the presence of N. ceranae and indicated the presence of a single new variant. Furthermore, two of the spore-containing colonies had only N. ceranae present, and these exhibited the presence of smaller spores that could be distinguished from N. apis by the analysis of average spore size. Differential quantification of the PCR product revealed N. ceranae to be the dominant species in all seven samples tested. In conclusion, N. ceranae is widespread in Scotland where it exists in combination with the endemic N. apis. A single variant, identical to that found in France (DQ374655) except for the addition of a single nucleotide polymorphism, is present in Scotland

    Crop Updates 2003 - Geraldton

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    This session covers twenty eight papers from different authors Seasonal Outlook: What is in store for 2003, David Stephens, Department of Agriculture Examining The Management Options For Wheat Crops In The Coming Season, James Fisher, Department of Agriculture GMO’s – what do they offer? Ian Edwards, Grain Bio Tech Australia Pty Ltd The Big Gamble – Wheat prices for 2003, Dennis Wise, Profarmer Market outlook for other grains, Andrew Young, General Manager Agricorp Stripe rust – where to now for the WA wheat industry? Robert Loughman, Ciara Beard and Greg Shea, Department of Agriculture Baudin and Hamlin – new generation of malting barley developed in Western Australia, Blakely Paynter, Roslyn Jettner and Kevin Young, Department of Agriculture DBM in Canola, Kevin Walden, Department of Agriculture The latest on Lupin diseases, Geoff Thomas, Department of Agriculture Wheat variety performance in 2002 compared to the long term, Robin Wilson, Iain Barclay, Robyn McLean, Robert Loughman, Jenny Garlinge, Bill Lambe, Neil Venn and Peter Clarke, Department of Agriculture Do wide rows drought proof lupins on red loam? Martin Harries, Bob French, Wayne Parker and Murray Blyth, Department of Agriculture Do wide rows drought proof lupins on a sandy loam? Martin Harries, Bob French, Wayne Parker and Murray Blyth, Department of Agriculture Profit Proving Precision Agriculture, Peter Norris, Agronomy For Profit, Greg Lyle, CSIRO Land and Water, Yuna Farm Improvement Group Annual ryegrass seedbanks: the good, the bad, and the ugly, Kathryn Steadman, University of Western Australia, Amander Ellery, CSIRO Plant Industry, Sally C Peltzer, Department of Agriculture Wheat management packages for low rainfall areas, Kari-Lee Falconer, Department of Agriculture Ground water 1. Atrazine, Russell Speed, Department of Agriculture Groundwater 2. Current Trends, Russell Speed, Department of Agriculture Herbicide tolerance of wheat, lupins and pastures, Terry Piper and Harmohinder Dhammu, Department of Agriculture Farming with Tramlines, Bindi Webb, Paul Blackwell, Department of Agriculture, Phil Logue, Binnu, Nigel Moffat, Geraldton, Rohan Ford, Binnu, Miles Obst, Mingenew, The role of green manure crops in renovating poor performing paddocks: What’s it worth? Frances Hoyle, Leanne Schulz and Judith Devenish Department of Agriculture The looming threat of wild radish, Peter Newman, Department of Agriculture Does one ‘size’ fit all? Grant Morrow, Syngenta Crop Protection Climate Forecasts on the Internet, Ian Foster and David Stephens, Department of Agriculture Moisture delving = more reliable lupin establishment, Paul Blackwell, and Wayne Parker, Department of Agriculture Tramline Designs for better Weed control and Wheat value from non-spraying tramlines in a dry season, Paul Blackwell, Bindi Webb and Darshan Sharma, Department of Agriculture Biserrula Grazing Trial, Marnie Thomas, Department of Agriculture Performance of IT and TT canola varieties in the medium and high rainfall agzones of W.A., 2001-02, Graham Walton, Hasan Zaheer and Paul Carmody, Department of Agriculture Rapid Catchment Appraisal in Northern Agricultural Region, Mike Clarke, Paul Raper, Department of Agricultur

    Neonicotinoid Insecticides and Their Impacts on Bees: A Systematic Review of Research Approaches and Identification of Knowledge Gaps

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    It has been suggested that the widespread use of neonicotinoid insecticides threatens bees, but research on this topic has been surrounded by controversy. In order to synthesize which research approaches have been used to examine the effect of neonicotinoids on bees and to identify knowledge gaps, we systematically reviewed research on this subject that was available on the Web of Science and PubMed in June 2015. Most of the 216 primary research studies were conducted in Europe or North America (82%), involved the neonicotinoid imidacloprid (78%), and concerned the western honey bee Apis mellifera (75%). Thus, little seems to be known about neonicotinoids and bees in areas outside Europe and North America. Furthermore, because there is considerable variation in ecological traits among bee taxa, studies on honey bees are not likely to fully predict impacts of neonicotinoids on other species. Studies on crops were dominated by seed-treated maize, oilseed rape (canola) and sunflower, whereas less is known about potential side effects on bees from the use of other application methods on insect pollinated fruit and vegetable crops, or on lawns and ornamental plants. Laboratory approaches were most common, and we suggest that their capability to infer real-world consequences are improved when combined with information from field studies about realistic exposures to neonicotinoids. Studies using field approaches often examined only bee exposure to neonicotinoids and more field studies are needed that measure impacts of exposure. Most studies measured effects on individual bees. We suggest that effects on the individual bee should be linked to both mechanisms at the sub-individual level and also to the consequences for the colony and wider bee populations. As bees are increasingly facing multiple interacting pressures future research needs to clarify the role of neonicotinoids in relative to other drivers of bee declines

    Author Correction: The FLUXNET2015 dataset and the ONEFlux processing pipeline for eddy covariance data

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    The FLUXNET2015 dataset and the ONEFlux processing pipeline for eddy covariance data

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    The FLUXNET2015 dataset provides ecosystem-scale data on CO2, water, and energy exchange between the biosphere and the atmosphere, and other meteorological and biological measurements, from 212 sites around the globe (over 1500 site-years, up to and including year 2014). These sites, independently managed and operated, voluntarily contributed their data to create global datasets. Data were quality controlled and processed using uniform methods, to improve consistency and intercomparability across sites. The dataset is already being used in a number of applications, including ecophysiology studies, remote sensing studies, and development of ecosystem and Earth system models. FLUXNET2015 includes derived-data products, such as gap-filled time series, ecosystem respiration and photosynthetic uptake estimates, estimation of uncertainties, and metadata about the measurements, presented for the first time in this paper. In addition, 206 of these sites are for the first time distributed under a Creative Commons (CC-BY 4.0) license. This paper details this enhanced dataset and the processing methods, now made available as open-source codes, making the dataset more accessible, transparent, and reproducible.Peer reviewe
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