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| Hoek, C. van den; Donze, M.. |
| It is concluded on the basis of data gathered from the literature and of our personal observations, that the algal phytogeographic provinces as assumed by several authors do not exist. The algal floras of NW. Spain and Brittany are richest in species. From these two regions down to the south but far more so up to the north the algal flora gradually changes mainly by species dropping out and being only partially replaced by others. One very obvious floristic discontinuity is not correlated with a discontinuity in the temperaturerange of the surface-water, namely the one along the west coasts of the British Isles. The floristic discontinuity Arctic Europe-Spitsbergen is correlated with a temperature discontinuity. Floristically and as regards... |
| Tipo: Article / Letter to the editor |
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| Ano: 1967 |
URL: http://www.repository.naturalis.nl/record/526047 |
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| Donze, M.. |
| This study forms a part of biological, oceanographical, and sedimentological investigations carried out in the Ria de Arosa (NW. Spain) 1962—1964. Details of the aim and scope of these investigations have been set forth by Brongersma and Pannekoek (1966). The present paper deals with the macroscopic algae of this region. Firstly, it was attempted to obtain a complete survey of the floristic composition. These data were utilized in a study of algal phytogeography (van den Hoek and Donze, 1967). Secondly, a rough description of the intertidal vegetation types and zonation patterns is given. Thirdly, the local distribution of species and vegetation types is outlined with respect to the main environmental factors. Fourthly, a rather detailed picture of the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1968 |
URL: http://www.repository.naturalis.nl/record/524980 |
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