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Community development following removal of urchins, Strongylocentrotus droebachiensis, from the rocky subtidal zone of the St. Lawrence Estuary, Eastern Canada
SummaryThe role of sea urchins, Strongylocentrotus droebachiensis, in structuring the rocky subtidal community was examined at Anse aux Basques on the north shore of the St. Lawrence Estuary, Québec.Expand
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A population of Laminaria longicruris de la Pylaie was followed for a year at Bic Island, Quebec, Canada where nutrient levels in the seawater were elevated throughout the year. Tagged kelp wereExpand
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Réponse d'une communauté de diatomées de glace à un gradient de salinité (baie d'Hudson)
Sea ice offers a physical support to the growth of microalgae (epontic community). Almost all the studies on ice microflora in the Arctic and the Antarctic have been performed in waters of highExpand
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Sea Urchins in the Saint Lawrence Estuary: Their Abundance, Size-Structure, and Suitability for Commercial Exploitation
Quantitative transects were made at nine locations along the Saint Lawrence Estuary, Quebec, to examine changes in the abundance and size-structure of populations of the green sea urchin,Expand
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Sea ice diatoms from Manitounuk Sound, southeastern Hudson Bay (Quebec, Canada). : II. Naviculaceae, genus Navicula
The genus Navicula is the major constituent of the sea ice diatom community of Manitounuk Sound, Hudson Bay. Taxonomical information is given for 43 taxa of the genus Navicula by means of completeExpand
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Sea ice diatoms from Manitounuk Sound, southeastern Hudson Bay (Quebec, Canada). I. Family Naviculaceae
More than 110 species of diatoms were identified from samples collected from Manitounuk Sound, Hudson Bay, in 1978. We presently deal with six genera, belonging to the family Naviculaceae; DiploneisExpand
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Environmental forcing versus endogenous control of photosynthesis in intertidal epilithic microalgae
Photoadaptation and photosynthetic capacity of an intertidal epilithic microflora were measured hourly over a period of 8 d. The algae were photoadapted to the dim light intensities experienced whenExpand
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Brooding behaviour of the northern sea star Leptasterias polaris
The northern sea star Leptasterias polaris (Müller and Troschel) has a unique mode of brooding its young. The mother curves her arms along the plane of the disc, the whole individual assuming aExpand
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In this paper we discuss and illustrate the morphological and ultrastructural features of several Fragilaria and Synedra representatives. These features are often very similar in the two genera,Expand
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