The seasonal variation in chemical constitution of some of the sub‐littoral seaweeds common to scotland. Part II. Laminaria digitata

摘要: It is well known that seaweed, vast quantities of which grow around the coast Scotland, undergoes wide seasonal variation in chemical constitution, and it important this be so weed can harvested at appropriate period. Monthly samples Laminaria cloustoni have been collected a definite spot constant depth over period two years, plants divided into stipe frond analysed separately for total ash, organic nitrogen, iodine, mannitol, laminarin alginic acid. The results show variations composition, previously recorded, are due almost entirely to composition fronds. Samples also taken depths 1/2 61/2 fathoms (L.W.) with immersion studied.