Titlebook: Evolutionary Biogeography of the Marine Algae of the North Atlantic; David J. Garbary,G. Robin South Conference proceedings 1990 Springer-

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The Framing of Biogeographic Hypothesesdiscussed and the importance of proper assessment of the ontological status of the units of biogeography is addressed. Criteria for the framing of biogeographical hypotheses, invoking clarity, comparability and rigour, are suggested.

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Quantitative Methods and Biogeographic Analysis The delineation of biogeographic “provinces” or areas is a type of descriptive analysis that can be accomplished by clustering faunal data (with or without spatial contiguity constraint) and drawing the resulting choropleth map. On the other hand, ecological biogeographers like to use ordinations o

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Behavioural, Morphological and Genetic Changes in Some North Atlantic Populations of the Barnacle ,On a smaller geographical scale, we focus on North American populations and show that behavioural, morphological and genetic differences occur between the Gulf of St. Lawrence and the North Atlantic populations of .. We discuss the possible role of selective environmental pressures (e.g. ice scourin

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The Application of DNA-DNA Hybridization in Seaweeds and DNA Divergence Between Some Amphi-Atlantic gnificantly from ., plants and . in the ratio of NPH to ΔT. values. This difference is discussed from an evolutionary and molecular perspective. We conclude that the intensity and frequency of genome evolutionary processes (such as DNA turnover) not only hamper the ability to infer phylogenetic rela