『Abstract
Sediment and water from the Meiliang Bay of Lake Taihu were analyzed
to examine the historical relation between the accumulation of
biogenic silica (BSi) and total phosphorus (TP). The results indicate
that BSi accumulation in the northern part of Lake Taihu had been
controlled by diatom production and phosphorus loading since the
1950s. BSi accumulation increased with the growing agricultural
activity since the 1950s, up to a maximum level in the 1960s.
After that, BSi accumulation decreased due to the diatom dissolution
till the 1980s, and then the diatom biomass decreased with BSi
accumulation increased. Lake Taihu came into an accelerated eutrophication
periods since the 1990s, while BSi accumulation began to increase
but the proportion of diatom decreased. Although the onset of
silica depletion cannot be confirmed in the present work, it is
clear that BSi accumulation was restrained by the input of TP.
Keywords: Lake Taihu; Eutrophication; BSi accumulation; TP loading;
Total organic carbon; Total nitrogen』
Introduction
Materials and methods
Study area and sampling
Analytical methods
Results and discussion
Nutrient accumulation rates
Atomic nutrient ratios
Water sample analysis
Historical eutrophication in Lake Taihu
Conclusions
Acknowledgments
References