Data/hora: 10/06/2024 05:40:58

Provedor de dados: | 5
País: | France
Título: | How do coral reef Gastropods feel about nuclear blasts? A long-term study of the effects of man-made perturbations
Autores: | Lanctot, Jl; Legendre, P; Salvat, B.
Data: | 1997
Ano: | 1997
Palavras-chave: | Atmospheric nuclear tests; Clustering; Coral reefs; Gastropods; Perturbation.
Resumo: | The resistance to perturbations of reef-dwelling gastropod assemblages was studied on the seaward reefs of Fangataufa atoll (French Polynesia) after their exposure to atmospheric nuclear tests, a major man-made perturbation. We focused on two important aspects: (1) the temporal evolution of the densities of the most important species before and after the tests, and (2) the temporal evolution of the spatial structure of the assemblages. Three transects, crossing several geomorphological zones, were established on the seaward reefs of the atoll. Each transect was sampled at irregular time intervals during a twenty-year period. Several univariate and multivariate methods were used to study (1) the temporal fluctuations in species abundances and ranks, and (2) the spatial structure of the assemblages and its temporal evolution. Results suggst that, even if the densities of several species dropped immediately after the nuclear tests, most species were able to quickly recolonise the perturbed reefs. The spatial distributions of several species are not greatly influenced by abiotic conditions, thus creating an unstable spatial structure for the assemblages through time (except in the supralittoral zones).
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/00093/20394/18061.pdf
Editor: | Gauthier-Villars
Relação: | http://archimer.ifremer.fr/doc/00093/20394/
Formato: | application/pdf
Fonte: | Oceanolica Acta (0399-1784) (Gauthier-Villars), 1997 , Vol. 20 , N. 1 , P. 243-257