Diatom Taphocoenoses in the Coastal Upwelling Areas off Western South America

摘要

Diatom floral analyses of 116 sediment surface samples obtained off Peru reveals a boundary in the sediments between coastal upwelling influenced sediments and sediments outside the highly productive realm. Sinuous patterns of relative abundance for meroplanktic species (Actinocyclus octonarius, Actinoptychus senarius, and Cyclotella striata/stylorum) may preserve the meander-like patterns of surface water parameters off Peru. The occurrence of loci of high abundance of diatom valves per gram of dry sediment, and the limited occurrence of Skeletonema costatum and of a species of the genus Delphineis are additional pieces of evidence that upwelled tongues of cold water have a correspondingly patchy sediment signal. The tables which constitute this report present the basic data and results of statistical analysis for the paper 'Diatom Taphocoenoses in the Coastal Upwelling Area off Western South America' by Gretchen Schuette and Hans Schrader. Because of editorial constraints these tables were not included with the paper in Nova Hedwigia, Beiheft 64 (Proceedings of the Fifth International Symposium on Living and Fossil Diatoms, Antwerp) 1979. (Author)