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The effect of the depth of immersion on the chemical constitution of some of the sub-littoral seaweeds common to Scotland

โœ Scribed by Black, W. A. P.

Book ID
102889658
Publisher
Wiley (John Wiley & Sons)
Year
1950
Weight
508 KB
Volume
69
Category
Article
ISSN
0368-4075

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โœฆ Synopsis

Abstract

An investigation into the variations in chemical constitution of the common British Laminariaceae, L. cloustoni, L. digitata and L. saccharina, collected at depths of 1โ€“24 m., has been carried out in Orkney. At certain times of the year variations in chemical composition, in addition to those due to the recognized seasonal variations, have been found to occur in the fronds with very little variation., in the stipes. In general, in the fronds an increase in mannitol occurs with depth, reaching a maximum at 6โ€“10 m., indicating that maximum photosynthesis probably occurs at that depth, in agreement with the observations of previous workers. Below 10 m., the mannitol decreases again. Laminarin decreases progressively with depth, being at a maximum at 3โ€“6 m., and is absent in samples from 3 depth below 16 m.

๐Ÿ“œ SIMILAR VOLUMES

The seasonal variation in chemical const
The seasonal variation in chemical constitution of some of the sub-littoral seaweeds common to scotland. Part I.laminaria cloustoni
โœ Black, W. A. P. ๐Ÿ“‚ Article ๐Ÿ“… 1948 ๐Ÿ› Wiley (John Wiley & Sons) โš– 378 KB ๐Ÿ‘ 2 views

## Abstract It is well known that seaweed, vast quantities of which grow around the coast of Scotland, undergoes wide seasonal variation in chemical constitution, and it is important that this variation be known so that the weed can be harvested at the appropriate period. Monthly samples of __Lamin

The seasonal variation in chemical const
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โœ Black, W. A. P. ๐Ÿ“‚ Article ๐Ÿ“… 1948 ๐Ÿ› Wiley (John Wiley & Sons) โš– 367 KB ๐Ÿ‘ 2 views

## Abstract In a previous communication, ^1^ the seasonal variation in chemical constitution of __Laminaria cloustoni__ over a period of two years was given. The present paper outlines the seasonal variation in ash, crude protein, iodine, mannitol, laminarin and alginic acid of __Laminaria digitata

The seasonal variation in chemical const
The seasonal variation in chemical constitution of some of the sub-littoral seaweeds common to scotland. Part III.laminaria saccharinaandsaccorhiza bulbosa
โœ Black, W. A. P. ๐Ÿ“‚ Article ๐Ÿ“… 1948 ๐Ÿ› Wiley (John Wiley & Sons) โš– 462 KB ๐Ÿ‘ 2 views

## Abstract In previous communications, ^1, 2^ the seasonal variation in chemical constitution of the laminariales __cloustoni__ and __digitata__ over a period of two years was recorded. The present paper outlines the seasonal variation in ash, crude protein, iodine, mannitol, laminarin and alginic

The seasonal variation in chemical compo
The seasonal variation in chemical composition of some of the littoral seaweeds common to scotland. Part I.Ascophyllum nodosum
โœ Black, W. A. P. ๐Ÿ“‚ Article ๐Ÿ“… 1948 ๐Ÿ› Wiley (John Wiley & Sons) โš– 345 KB ๐Ÿ‘ 2 views

## Abstract The ash, iodine, crude protein, mannitol, laminarin and alginic acid contents of samples of __Ascophyllum nodosum__ taken at monthly intervals from April, 1945, to March, 1947, have been determined. The samples were taken from three different habitats in the neighbourhood of Oban in ord

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Seasonal variation in chemical composition of some of the littoral seaweeds common to scotland. Part II.Fucus serratus. Fucus Vesiculosus. Fucus spiralis and pelvetia canaliculata
โœ Black, W. A. P. ๐Ÿ“‚ Article ๐Ÿ“… 1949 ๐Ÿ› Wiley (John Wiley & Sons) โš– 794 KB

## Abstract In previous communications,^1,2,3^ the seasonal variation over a period of two years in the ash, iodine, crude protein, mannitol, laminarin and alginic acid contents of the Laminariaceae common to Scotland, has been reported, while in. a later paper,^4^ the variations in the above const