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Although now over 100 years old, the classification of climate originally formulated by Wladimir Köppen and modified by his collaborators and successors, is still in widespread use. It is widely used in teaching school and undergraduate courses on climate. It is also still in regular use by researchers across a range of disciplines as a basis for climatic(More)
Updated world map of the Köppen-Geiger climate classification M. C. Peel, B. L. Finlayson, and T. A. McMahon Department of Civil and Environmental Engineering, The University of Melbourne, Victoria, Australia School of Anthropology, Geography and Environmental Studies, The University of Melbourne, Victoria, Australia Received: 15 February 2007 – Accepted:(More)
The distribution of Tn5271-related DNA sequences in samples of groundwater and a groundwater bioremediation system at the Hyde Park (Niagara Falls, N.Y.) chemical landfill site was investigated. PCR amplification of target sequences within the cha genes of Tn5271 revealed similar sequences in the groundwater community and in samples from the sequencing(More)
IS1071 is a class II transposable element carrying a tnpA gene related to the transposase genes of the Tn3 family. Copies of IS1071 that are conserved with more than 99% nucleotide sequence identity have been found as direct repeats flanking a remarkable variety of catabolic gene sequences worldwide. The sequences of chlorobenzoate catabolic transposons(More)
The frequency of isolation of three nonhomologous chlorobenzoate catabolic genotypes (clc, cba, and fcb) was determined for 464 isolates from freshwater sediments and groundwater in the vicinity of the Hyde Park industrial landfill site in the Niagara watershed. Samples were collected from both contaminated and noncontaminated sites during spring, summer,(More)
The structure and function of transposable elements that code for catabolic pathways involved in the biodegradation of organic compounds are reviewed. Seven of these catabolic transposons have structural features that place them in the Class I (composite) or Class II (Tn3-family) bacterial elements. One is a conjugative transposon. Another three have been(More)
Post-meiotic tetraspore mother cells of Corallina officinalis L. have been studied by light and electron microscopy. During the course of post-meiotic cellular reorganisation each nucleus becomes surrounded by a complex of precisely oriented endoplasmic reticulum, termed nuclear endoplasmic reticulum. A distinctive feature of this relationship is an(More)
Horizontal gene transfer in the Bacteria has been demonstrated to occur under natural conditions. The ecological impact of gene transfer events depends on the new genetic material being expressed in recipient organisms, and on natural selection processes operating on these recipients. The phylogenetic distribution of cbaAB genes for chlorobenzoate(More)
Hydroclimatic variability occurs over time scales ranging from seconds through to millennia. Fluctuations at certain time scales, like monthly, seasonal, annual, interannual and interdecadal, are particularly important for the sustainable management of land and water resources systems. Quantifying the proportion of variation in a hydroclimatic time series(More)