In
Phaeophyta, 0.5% and 2.5% Pachydictyon coriaceum methanol extract and 2.5% Colpomenia bullosa extract were also extremely larvicidal, as was a methanol extract of Rhodophyta species Gelidium amansii at 2.5%.
In the present study, brown algae (
Phaeophyta) and pocilloporid coral recruits were dominant in reefs affected by terrestrial run-off explaining the high recruit numbers but low diversity in these reefs.
Many of the world's familiar seaweeds are members of
Phaeophyta. Like the chrysophytes brown algae derive their color from the presence, in the cell chloroplasts, of several brownish carotenoid pigments, as fucoxathin.
Table 1: Examples of Marine Macroalgae PHYLUM GENUS COMMON NAME EXAMPLE
Phaeophyta: Alaria Kelp, bladderlocks Alaria esculenta Ascophyllum Egg wrack Ascophyllum nodosum Ecklonia Kelp Ecklonia maxima
Phaeophyta: Laminaria sp.
Variation in chemical defenses against herbivory in Southwestern Atlantic Stypopodium zonale (
Phaeophyta).
Demographic studies of the annual kelps Nereocystis luetkeana and Costaria costata (Laminariales,
Phaeophyta) in Puget Sound, Washington.
(Laminariales:
Phaeophyta) in the Alaskan Beaufort Sea.
Toxicity tests using developmental stages of Hormosira banksii (
Phaeophyta) identify ammonium as a damaging component of secondary treated sewage effluent discharged into Bass Strait, Victoria, Australia.
Seaweeds are classified in terms of their pigments, nutrient contents and chemical composition as Rhodophyta,
Phaeophyta or Chlorophyta whereas seagrasses have no real taxonomical classification.
The study on antiproliferative activity of crude extracts of ten
Phaeophyta species isolated from Brittany coasts against three human cancers, human leukaemic T cell lymphoblast (Jurkat), human Burkitt's lymphoma (Daudi), and human chronic myelogenous leukaemia (K562) cells, showed strong antitumor potential of Sargassaceae species, Dictyota dichotoma, and Desmarestia ligulata [15].
Iconographie d'algues Mediterraneennes: Chlorophyta,
Phaeophyta, Rhodophyta, J.