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    • Paul H Williams

      Paul H Williams

      Natural History Museum, London, UK | Wisconsin Fast Plants, University of Wisconsin–Madison, Madison, WI 53706 | A. Balmford, T. Brooks and N. Burgess, Conservation Biology ...



      KOL Resume for Paul H Williams


      Natural History Museum, London, UK


      Wisconsin Fast Plants, University of Wisconsin–Madison, Madison, WI 53706


      A. Balmford, T. Brooks and N. Burgess, Conservation Biology Group, Dept of Zoology, Univ. of Cambridge, Downing Street, Cambridge, U.K. CB2 3EJ (present address of J. L. M.; CSIRO Entomology, GPO Box 1700, Canberra ACT 2601, Australia). – M. Folkmann and J. Karup, Dept of Computer Science, Univ. of Copenhagen, Universitetsparken 1, DK-2100 Copenhagen, Denmark. – C. Rahbek, Zoological Museum, Univ. of Copenhagen, Universitetsparhen 15, DK-2100, Copenhagen, Denmark. – P. H. Williams, Biogeography and Conservation Laboratory, The Natural History Museum, Cromwell Road, London, U.K. SW7 5BD


      Department of Geography, University College, WC1H 0AP London, U.K.


      Department of Plant Pathology, University of Wisconsin, Madison, WI 53706


      Department of Entomology, British Museum (Natural History), Cromwell Road, London, England SW7 5BD


      Biogeography and Conservation Laboratoy, The Natural History Museum, London SW7 5BD, U. K.


      Department of Applied Biology, University of Cambridge, Cambridge


      Department of Applied Biology, University of Cambridge


      Dept. of Plant Pathology, University of Wisconsin-Madison, 1630 Linden Dr., 53706, Madison, WI, USA

      Professor in the Department of Plant Pathology at the University of Wisconsin-Madison, Madison, WI 53706.

      Department of Entomology, British Museum (Natural History), Cromwell Road, London SW7 5BD


      Department of Plant Pathology, University of Wisconsin, 53706, Madison, Wisconsin


      Department of Applied Biology, University of Cambridge, Pembroke Street, Cambridge CB2 3DX, UK


      Department of Plant Pathology, University of Wisconsin, 53706, Madison, WI, USA


      The Connecticut Agricultural, Experiment Station, New Haven, Connecticut

      Department of Plant Pathology and School of Forest Resources, North Carolina State University, Raleigh, North Carolina



      Paul H Williams: Influence Statistics

      Sample of concepts for which Paul H Williams is among the top experts in the world.
      Concept World rank
      pascuorum muscorum #1
      beesticks #1
      nitrile hydrogen peroxide #1
      median distributions #1
      speciespoor locality #1
      comtés cumbria #1
      shoreham species #1
      core satellite hypothesis #1
      dungeness shoreham #1
      faunas tibetan #1
      depths flowers #1
      nigra 8 #1
      gv environmental variation #1
      tibetan interior faunas #1
      school college teaching #1
      infected cabbage leaves #1
      53 posters #1
      crop brassicas context #1
      bacteria vessels #1
      sembleraitil #1
      shoreham flower #1
      bumble bees dungeness #1
      kent median #1
      bumble bees locality #1
      pvgenotypic variation #1
      biology leptosphaeria maculans #1
      endemic himalayan faunas #1
      scopoli cumbria durham #1
      rapidcycling brassicas #1
      flowers dungeness #1
      orkney islands pascuorum #1
      tungstate catalyzed #1
      dungeness species #1
      british bumble bees #1
      rapa fast #1
      pascuorum northern #1
      british bumble #1
      beesticks methods #1
      shoreham dungeness #1
      localities local species #1
      local species kinds #1
      1988 bombus muscorum #1
      species bumble bees #1
      insect pollination method #1
      initial curriculum assessment #1


      Prominent publications by Paul H Williams

      KOL-Index: 8237

      WILLIAMS, P. H., 1989. Why are there so many species of bumble bees at Dungeness? Dungeness is unique in the British Isles in that it has more species of bumble bees than any other locality. Three ideas about what governs the number of species at a locality are examined by locking at patterns of flower visits at Dungeness in comparison with those at Shoreham, a species-poor locality also in Kent. The species of bumble bees that are present at Dungeness but absent from Shoreham show no ...

      Known for Bumble Bees | Proboscis Lengths | Flower Visits | British Isles | Food Plants
      KOL-Index: 7599

      A global collection of 123 putative isolates of Fusarium oxysporum from crucifers was examined for pathogenicity, isozyme polymorphism, and vegetative compatibility. Of these isolates, 103 were found to be pathogenic on one or more of six differential crucifer cultivars. Three patterns of isozyme polymorphism (electrophoretic types) were found and by means of a nitrate reductase complementation test, three major vegetative compatibility groups were identified that could differentiate ...

      Known for Vegetative Compatibility | Fusarium Oxysporum | Geographic Origin | Isozyme Polymorphism | Formae Speciales
      KOL-Index: 6820

      Abstract: It has been suggested that using complementarity to identify networks of important areas for conserving biodiversity may preferentially select areas within the margins of species ranges. We tested this idea by examining the location of complementarity hotspots in relation to two measures of range core-periphery. The first measures patterns of aggregation among records within each species' range to identify areas within the core (i.e., areas with aggregated distributions) and ...

      Known for Marginal Populations | Species Ranges | Areas Complementarity | Range Edges | Terrestrial Vertebrates
      KOL-Index: 5592

      Biogeographic regions are widely regarded as real entities, or at least as useful summaries of the complex patterns of spatial concordance among species. The problem is that, whereas some parts of the transition zones between regions may be strong and abrupt, other parts of the same zones may be weak or broad, so that the corresponding parts of border lines drawn on maps, although convenient, are arbitrary constructs. One approach to investigating transition zones ascribes values to the ...

      Known for Species Turnover | Transition Zones | Biogeographic Regions | Strength Breadth | Degree Spatial
      KOL-Index: 5523

      Selection for resistance to Plasmodiophora brassicaeWor. in oriental groups of Brassica rapa L.Two hundred and sixty-five cultivars of leafy, oriental bassicas were tested for resistance to 18 collections of Plasmodiophora brassicae, the causal agent of clubroot. The tests were conducted in the greenhouse at low and high level inoculum concentrations. Eleven cultivars of B. rapa pe-tsai, five cultivars of B. rapa pak-choy and three cultivars of B. rapa choy-sum consistently segregated ...

      Known for Plasmodiophora Brassicae | Brassica Rapa | Resistance Pathotype
      KOL-Index: 5321

      Meralgia paresthetica is a syndrome of pain or dysesthesia, or both, in the anterolateral thigh caused by entrapment or neurinoma formation of the lateral femoral cutaneous nerve. Conservative treatment was successful in relieving symptoms in 91% of 277 patients with this syndrome; however, 24 patients required surgical treatment for intractable symptoms. Although neurolysis with transposition is the most common procedure, sectioning of the lateral femoral cutaneous nerve was performed ...

      Known for Meralgia Paresthetica | Neurolysis Transposition | Surgical Treatment | Anatomical Variations | Femoral Nerve
      KOL-Index: 5090

      Area-selection methods have recently gained prominence in conservation biology. A typical problem is to identify the minimum number of areas required to represent all species over some geographic region. Iterative heuristic methods have been developed by conservation scientists to solve these problems, although the solutions cannot be guaranteed to be optimal. Although optimal solutions can often be found, heuristics continue to be popular as they are perceived to be faster and more ...

      Known for Optimal Solutions | Heuristic Methods | Conservation Biology | Distributional Data | Saharan Africa
      KOL-Index: 4594

      Resistance to gummy stem blight (Didymella bryoniae) was not detected among 1208 cucumber lines of diverse origin when cotyledons of four-day-old seedlings were inoculated with an aqueous suspension of 5000 spores of D. bryoniae delivered to freshly crushed tissue, followed by 48 h incubation at 20°C and 100% RH in the dark. Among 49 lots evaluated for gummy stem blight in the field, cv. Homegreen #2 and Pl 200818 from Burma were resistant. Earliness in fruit maturity was positively ...

      Known for Gummy Stem Blight | Didymella Bryoniae | Cucumis Sativus | Resistant Lines | Seedlings Inoculated
      KOL-Index: 4306

      ABSTRACT. 1Analysis of surveys of bumble bee distribution among 2 km grid-squares in Kent revealed that some species are nearly ubiquitous among localities and abundant within each. For these ubiquitous species, Kent is near the middle of their latitudinal ranges.2The other species have very restricted distributions among localities and are less abundant where they occur. For each of these local species, Kent is near the margin of its latitudinal range.3The areas to which the local ...

      Known for Bumble Bees | Bombus Spp | Local Species | Environmental Factors | 2 Gridsquares
      KOL-Index: 4091

      The Tibetan plateau and its immediately surrounding mountains include the greatest hotspot of diversity worldwide for bumblebees, which are among the most important pollinators in temperate ecosystems. We make the first quantitative description of variation in the species composition of alpine social bumblebee faunas across the Tibetan plateau, for 44 species in 124 of the 307 one-degree grid cells. Data were compiled from field surveys, published sources and museum collections. Sampling ...

      Known for Tibetan Plateau | Bombus Latreille | Species Composition | Bumblebee Conservation | Hindu Kush
      KOL-Index: 4046

      Black rot lesion development in cabbage leaves was correlated with accumulation of plugging material in the xylem vessels as Xanthomonas campestris multiplied and spread. Plug formation preceded a partial disorganization of the xylem, and spillage of bacteria from the vessels. The movement of eosin and





      was blocked within the vessels, and plugs caused water ...

      Known for Bacteria Vessels | Black Rot | Cabbage Leaves | Xanthomonas Campestris | Water Stress
      KOL-Index: 3675


      Records of bumble bees from four collecting trips (1977, 1978, 1988, and 1994) in northern Britain show apparent changes in the incidences of two species. Until 1988,

      Bombus muscorum

      (Linnaeus) and

      Bombus pascuorum

      (Scopoli) were found in the counties of Cumbria, Durham, and North Yorkshire. Only




      Known for Bombus Muscorum | Pascuorum Scopoli

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      Paul H Williams:Expert Impact

      Concepts for whichPaul H Williamshas direct influence:Bumble bees,  Vegetative compatibility,  Hydrogen peroxide,  Bombus pascuorum,  Gummy stem blight,  Pyricularia oryzae,  Fast plants,  Bombus muscorum.

      Paul H Williams:KOL impact

      Concepts related to the work of other authors for whichfor which Paul H Williams has influence:Xanthomonas campestris,  Species richness,  Hydrogen peroxide,  Black rot,  Meralgia paresthetica,  Bumble bees,  Beta diversity.



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      Natural History Museum, London, UK | Wisconsin Fast Plants, University of Wisconsin–Madison, Madison, WI 53706 | A. Balmford, T. Brooks and N. Burgess, Conservation Biology Group, Dept of Zoology, Univ. of Cambridge, Downing Street, Cambridge, U.K. C

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