水生生物学报2006，Vol.30Issue(6)：702-710,9.
龙感湖沉积物泥芯硅藻群落和营养状态的反演
DIATOM COMMUNITY SUCCESSION AND NUTRIENT EVOLUTION RECORDED FROM A SEDIMENT CORE OF THE LONGGAN LAKE, A LARGE SHALLOW LAKE IN EAST CHINA
摘要
Abstract
The Longgan Lake is a shallow mesotrophic macrophytedominated lake. According to the high-resolution diatom research from its sediment core, the diatom community succession was built, and the total phosphorus (TP) and chlorophyll-a (Chl-a) concentration were quantitatively reconstructed for the past 2000 years, based on the diatom-TP and diatom-Chla transfer functions.The shifts of diatom assemblages also mirrored the developments of aquatic plant, reflecting the characters of aquatic ecosystem evolution. The inferred epilimnetic TP concentration fluctuated within a small range of 36 to 62μg/L, indicating the lake remained a relative stable mesotrophic status in the long historical period. The periodical variations of the diatom assemblage and trophic status suggest a mitigating function of shallow macrophyte-dominated lakes to nutrient input. The changes of lakes' trophic status don't linearly respond to the human disturbance in the catchment. The dynamics mechanism of phosphorus in macrophyte-dominated lakes, as inferred from diatoms, will provide a scientific foundation for the prediction of trophic status change in a shallow lake, as well as the lake ecological restoration and management decisions.关键词
Diatom assemblage/Nutrient/Quantitative reconstruction/Aquatic macrophyte/Longgan LakeKey words
Diatom assemblage/Nutrient/Quantitative reconstruction/Aquatic macrophyte/Longgan Lake分类
资源环境引用本文复制引用
DONG Xu-Hui,YANG Xiang-Dong..龙感湖沉积物泥芯硅藻群落和营养状态的反演[J].水生生物学报,2006,30(6):702-710,9.基金项目
the Scientific Innovation Projects of Chinese Academy of Sciences(KZCX1-SW-12)and the 973 projects(2002CB412300) （KZCX1-SW-12）
