Consulta: creatorFacets:"Le Campion-alsumard, T"
Registros recuperados: 2
Data/hora: 11/06/2024 00:57:23

Caractéristiques du feutrage algal des récifs coralliens de Polynésie française soumis à différentes intensités de bioérosion
Provedor de dados: 5
Autores: Le Bris, S; Le Campion-alsumard, T; Romano, Jc.
This study deals with the colonisation of experimental Porites blocks by epilithic and endolithic algal community in two atoll lagoons and two high-island lagoons in French Polynesia, exposed to different environmental conditions during a 5-year period. A qualitative analysis of the community (cyanobacteria and micro-algae) was carried out, and the relationship between the epilithic and endolithic strata observed. HPLC analysis of chlorophyll pigments was used to quantitatively determine the plant biomass, which was then compared to that of the algal turf of neighbouring reefs. The results show that these blocks are colonised according to two factors: the reef structure (atoll or high-island) and the degree of human disturbance. The epilithic and...
Tipo: Text
Palavras-chave: Récif corallien; Feutrage algal épilithe et endolithe; Biomasse; Bioérosion; Eutrophisation; Coral reef; Epilithic and endolothic algal community biomass; Bioerosion; Eutrophication.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43652/43241.pdf

Developmental aspects of biomineralisation in the Polynesian pearl oyster Pinctada margaritifera var. cumingii
Provedor de dados: 5
Autores: Che, Lm; Golubic, S; Le Campion-alsumard, T; Payri, C.
The shell biomineralisation with special reference to the nacreous region is observed during the development of the Polynesian pearl oyster. Ultrastructural changes were studied and timed for the first time from planktonic larval shells to two-year-old adult shells. During the first two weeks following fertilization, the prodissoconch-I shell structure is undifferentiated and uniformly granular. The prodissoconch-II stage which develops during the next two weeks acquires a columnar organization. Metamorphosis is characterized by the formation of the dissoconch shell with all the elements of an adult shell and marks the onset of the development of the nacre. Nucleation starts within an organic matrix from point sources forming 'crystal germs' which expand...
Tipo: Text
Palavras-chave: Biominéralisation; Couche nacrée; Huître perlière; Pinctada margaritifera; Polynésie française; Biomineralisation; Nacreous layer; Pearl oyster; Pinctada margaritifera; French Polynesia.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00291/40268/38642.pdf