Population Dynamics of Plankton Diatoms in a 69-Year Sequence of Annually Laminated Sediment
- 1 March 1984
- Vol. 43 (1) , 30-40
- https://doi.org/10.2307/3544242
Abstract
The population dynamics during 69 yr of 12 plankton diatom taxa in a eutrophic lake were analyzed. Data were obtained by microstratigraphical analysis of diatom frustules in the annually laminated sediment deposited at 17 m depth in the lake. On the basis of the recurring seasonal sequence of diatoms within most of the laminations, a successional, or ranking order of the taxa was obtained and 4 rank preference groups were identified: low-rank, mid-rank, high-rank and low- and high-rank taxa. Analyses of supra-annual population fluctuations, autocorrelation between the yearly abundances and specific year-to-year variability revealed notable differences in population dynamics. Pairwise correlation analysis between log-transformed yearly abundances produced a statistically significant aggregation of negative correlations between the low-rank taxa (the typical spring-maximum diatoms); positive correlations were significantly aggregated among the pairs with one low- and one high-rank taxon. Taxa with affinity to years with high diatom production, and others with apparent insensitivity to gross production fluctuations were identified by analysis of correlations between the yearly totals of plankton diatom production and the volumetric contribution of each taxon to the yearly totals.This publication has 1 reference indexed in Scilit: