The effects of docks on seagrasses, with particular emphasis on the threatened seagrass, Halophila johnsonii

In March of 2005, the National Oceanic and Atmospheric Administration's Special Projects Office released "Population Trends along the Coastal United States: 1980-2008." This report includes population changes and trends between 1980 and 2003 and projected changes in coastal populations by 2008. Given the findings, pressure on coastal resources around the country will continue to rise, particularly in Florida. ... One of our most valuable coastal resources is seagrass, but human desire and need to live on the coast means that our habitat overlaps with suitable seagrass habitat. Seagrasses can be found in coastal areas around the world but are limited to relatively shallow, relatively clear water because of their reliance on light for photosynthesis. Seagrasses provide food for both small and large marine organisms, larval and adult stage. They provide shelter and habitat to a variety of commercially important fish and invertebrates. They baffle the water column and inhibit the resuspension of sediments. They prevent erosion and fix and recycle nutrients. The physical and ecological benefits of seagrasses make them very important to human welfare, but their light-limited coastal distribution makes them highly susceptible to anthropogenic influences.

Sur la présence de l'Enhalus acoroide (L.f.) Roem. et Schultes au littoral du Viêtnam

In the "Flore Générale de l'Indochine" three species of phanerogams have been described: Halophila ovalis (R. Br.) Hook. f., Diplanthera uninervis (Forsk.) Aschers. and Ruppia rostella Koch in Rchb. In 1954, Dawson added to this list Halophila Beccari Aschers. and Thalassia hemprichii (Ehrenb.) Aschers. Even Mr. Feldmann found in the herbarium of the Oceanographic Institute of Nha-Trang, the Cymodocea rotundata (Ehrenb. & Hernpr.) Asch. & Schweinf., that the authors found in Cua-Be (Nha trang), Qui-Nhon and Da-Nang (Tourane).

Contribution à l'étude du peuplement du littoral rocheux du Vietnam (sud)

In this part 1, after a brief description of the habitat, the author describes in details (in descending order) the supralittoral, littoral and infralittoral zones. The author describes many permanent groups of Cyanophyceae in the higher horizon of intertidal zone, the cosmopolitan group of Navicula Grevillei, Hildenbrandtia prototypus, the pantropical group of Calothrix pilosa, Chaetomorpha antennina, indopacific group of Dermonema Frappieri, Sargassum, Padina, Thatassia Hemprichii, Halophila. The group of cold or temperate habitat with Bangiophycideae are present in winter. Some are described, formed by the oysters, Vermetus or Cirripeds, or by the algae (Calothrix, Brachytrichia, Gelidium, Dermonema, Chaetomorpha).