Seasonal Variation in the Inorganic Constituents of the Marine Alga Nereocystis luetkeana. Part I, Metallic Elements

Abstract

The marine alga Nereocystis luetkeana has been analyzed for solid matter, total ash, insoluble ash, potassium, sodium, magnesium, calcium and the minor and trace elements, strontium, iron, aluminum, zinc, barium, manganese, chromium, copper, cadmium, lead, cobalt and mercury. The seasonal variations in these parameters and the concentration differences between the fronds and stipes of the alga are presented and discussed.

Seasonal variation of reproductive and vegetative phases of Gracilaria pacifica Abbott, in Estero de Punta Banda, Baja California, Mexico

“…Species of this genus are harvested in 20 countries and are responsible for 60% of the world's agar production. The rest is obtained from Gelidium, 35%, and Pterocladia, 5% (Whyte and Englar, 1980). Huerta-Muzquiz (1961), Aguilar-Rosas (1982) and Aguilar-Rosas et al (1982) have pointed out that in Baja California the Gmcilatia species more frequently found, in some abundance and susceptible to be harvested and industrialized, are G. venucosa (Hudson) Papenfuss (now G. paci'ca Abbott) and G. sjoestedtii Kylin (now Gmciltiopsis leu7atle~ot7vi.r (Bory) Dawson, Acleto and Foldvik).…”

Binding of inorganic elements to kelp residues

“…Numerous qualitative and quantitative estimates of these inorganic elements in seaweed have been reported but only a few studies on seasonal variations have been published (Whyte & Englar 1976, 1978, 1980Rosell & Srivastava 1984) . The contents of these minerals vary with species, habitat, chemical composition of the algae, depth, temperature, location in the plant and season.…”