TY  - SER
AU  - Houvenaghel,G.T.
AU  - Houvenaghel,N.
TI  - Aspects écologiques de la zonation intertidale sur les côtes rocheuses des Îles Galapagos
U1  - 577.699 23
PY  - 1974///
KW  - Hydrology
KW  - Hidrología
KW  - Climatology
KW  - Climatología
KW  - Waters coastal
KW  - Aguas costeras
KW  - Galapagos
N2  - Features of the intertidal zonation on the rocky shores of the Galapagos Islands are described and discussed in relation to environmental factors, in particular temperature — which varies with regional hydrology and climatology. Owing to the thermal properties of the coastal waters and to the nature of the substrate (mainly basalt), intertidal organisms are exposed to a wide range of temperatures, which fluctuate with tide, day, and season. As a result, life is mostly restricted to the lowest levels of the shore; the middle- and upper-level populations are sparse. Local variations (biofacies) resulting from water agitation are described. Biota consist of tropical, subtropical, and warm-temperate components. Tropical species dominate in sheltered areas and in middle and upper shores
ER  -