. The algae. Algae. 12 3 4 Time in hours 2 3 4 5 Time in hours Fig. 211 A, water loss from samples of Enteromorpha and Chryso- phyceae belts when exposed in their original position on the cUff face. B, water loss during drainage in nature from different levels in the Enteromorpha and Chrysophyceae belts during successive hours in winter. Ej-Eg, Cj-Cg = successive levels. Water loss in A and B expressed as % of that originally present. (After Anand.) simple but ingenious method of weighing portions of the mat cut out so that they fitted into waterproof paper dishes which could be put back into
. The algae. Algae. 12 3 4 Time in hours 2 3 4 5 Time in hours Fig. 211 A, water loss from samples of Enteromorpha and Chryso- phyceae belts when exposed in their original position on the cUff face. B, water loss during drainage in nature from different levels in the Enteromorpha and Chrysophyceae belts during successive hours in winter. Ej-Eg, Cj-Cg = successive levels. Water loss in A and B expressed as % of that originally present. (After Anand.) simple but ingenious method of weighing portions of the mat cut out so that they fitted into waterproof paper dishes which could be put back into position on the shore. The reduced loss from the Chrysophyceae belt as compared with the Enteromorpha is due to the gelatinous nature of the former. This result was obtained de- spite the fact that the evaporating power of the air opposite the latter belt is 1-41 as compared with i-i opposite the Enteromorpha belt, the evaporating power of the Fucus belt being taken as unity. B. Physical factors (a) Substrate The nature of the substrate, whether solid rock, boulders, pebbles, sand, mud or peat, is of fundamental importance in con- nexion with anchorage, the general aspect of the flora being deter- mined to a large extent by this factor. It is essentially a presence or absence factor. On rocky coasts the angle of slope and the presence 391. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Chapman, V. J. (Valentine Jackson), 1910-. London, Macmillan; New York, St. Martin's Press
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, booksubjectalgae
