龍感湖沉積物泥芯硅藻群落和營養狀態的反演

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.

作 者： DONG Xu-Hui YANG Xiang-Dong   作者單位： Nanjing Institute of Geography & Limnology, the Chinese Academy of Sciences, Nanjing 210008, China  刊 名： 水生生物學報  ISTIC PKU 英文刊名： ACTA HYDROBIOLOGICA SINICA  年，卷(期)： 2006 30(6)  分類號： X172  關鍵詞： Diatom assemblage   Nutrient   Quantitative reconstruction   Aquatic macrophyte   Longgan Lake  

【龍感湖沉積物泥芯硅藻群落和營養狀態的反演】相關文章：

硅藻泥活動方案04-18

硅藻泥活動方案08-10

湖泊沉積物硅藻提純方法04-25

硅藻泥促銷活動方案02-19

硅藻泥活動方案4篇08-10

硅藻泥活動方案7篇03-15

投影尋蹤技術在城市河湖營養狀態評價中的應用04-26

寧波市主要湖庫浮游藻類調查及營養狀態研究04-25

湖芯沉積物揭示的末次冰消開始時期普莫雍錯湖區環境變化04-26

低軌衛星初始狀態誤差對反演地球重力場的影響04-27