| 摘要: |
| 本文通过对青藏高原湖泊表层沉积物色素、有机碳含量和环境因子的测定和分析,初步探讨了青藏高原湖泊中色素的来源特征和该地区湖泊浮游植物群落组成结构等信息。结果表明,青藏高原湖泊沉积物TOC含量多在4%~6%之间,藻类植物是沉积物色素的重要来源。颤藻科和蓝藻科在青藏高原湖泊浮游植物中生长优势明显,颤藻科在数量上相对蓝藻科有明显优势。青藏高原湖泊溶解氧(DO)、电导率(SC)对湖泊中藻类生长状况影响明显,其中SC的升高对该地区湖泊中藻类生长有抑制作用。 |
| 关键词: 青藏高原 湖泊沉积 色素 环境响应 |
| DOI： |
| 附件 |
| 投稿时间：2014-05-11修订日期：2014-05-18 |
| 基金项目: |
|
| Lacustrine sedimentary pigments and environmental responses on the Qinghai-Xizang Plateau |
| MA Hong-hai, REN Ya-qin, ZHANG Cheng-jun, WANG Peng |
(1. School of Resources and Environments, Lanzhou University, Lanzhou 730030, Gansu, China;
2. School of Geological Sciences and Mineral Resources, Lanzhou University, Lanzhou 730030, Gansu, China) |
| Abstract: |
| The present paper gives a preliminary study of the pigment sources in the lake sediments and community structures of the phytoplanktons in some lakes on the Qinghai-Xizang Plateau. The results of research show that total organic carbon (TOC) contents in the lakes mostly vary between 4% and 6%, and the aquatic pigments come mainly from algae and bacteria in the lakes. Oscillatoriaceae and Arthrospira platensis (cyanobacteria) have a marked advantage of growth in the phytoplanktons in the lakes on the Plateau. The number of Oscillatoriaceae is much more than that of Arthrospira platensis. The dissolved oxygen (DO) and specific conductance (SC) have an important effect on the phytoplanktons in the lakes. In particular, the increase of the specific conductance may restrain the growth of the phytoplanktons in the lakes. |
| Key words: Qinghai-Xizang Plateau lake sediments pigment environmental response |
