Knowledge Resource Center for Ecological Environment in Arid Area
| 盘星藻指示的全新世亚洲中部干旱区与季风边缘区水文-气候异步变化（英文） | |
| 向丽雄; 黄小忠 | |
| 中文摘要 | Subfossil Pediastrum,a genus of green algae(Chlorophyceae),which is sensitive to changes in the aquatic environment,can serve as a proxy for the evolution of the aquatic ecosystem and climate change.This study synthesizes subfossil Pediastrum records from arid central Asia(ACA) and the marginal areas of the Asian summer monsoon(MASM) to discuss the process of lacustrine ecosystem evolution during the Holocene.It was found that aquatic ecosystems performed differently in two areas influenced by different climate systems.In the early Holocene,the low concentration records of Pediastrum in ACA resulted from the higher salinity caused by dry climate or lower lake level,while,higher temperature or summer insolation promote growth of Pediastrum in relatively humid alpine lakes as there may have no limitation of salinity.In the same period,the concentration of Pediastrum was higher in the lakes located in the MASM.In the middle Holocene,Pediastrum began to appear in freshwater lake in the ACA with a higher concentration,while alpine lakes in inland areas and the MASM have significantly reduced because either cooling or reduced rainfall.In the late Holocene,the concentration of Pediastrum in lakes of the ACA had large fluctuations,indicating an unstable climate condition,while,in the MASM area,the Pediastrum was generally lower in abundance because higher salinity or alkalinity with weakened summer monsoon,and different lakes had large differences because of local environmental factors.The asynchronous change of Pediastrum in ACA and the MASM actually reflects the moisture or precipitation variation characteristics of the monsoon or westerly dominated climate modes.The change of Pediastrum is mainly controlled by salinity and/or alkalinity.There is a clear consistency between high concentration of Pediastrum and high precipitation in the MASM during the earlymid-Holocene,which indicates that the East Asian monsoon intensively increased with more precipitation and water level of the lakes.Varieties of Pediastrum in lake at middle-high latitudes,such as Lake Kanas in Altai Mountains and Lake Hulun in inner Mongolia,may be related to temperature fluctuation or nutrient input during the Holocene.The ecological processes and ecological limitations of Pediastrum are not clear enough,which leads to difficulties in explaining the paleo-ecological and paleoclimatic significance indicated by the changes in Pediastrum in the strata. |
| 中文关键词 | Pediastrum ; Aquatic ecosystems ; Spatial heterogeneity ; Marginal areas of the Asian summer monsoon ; Arid central Asia |
| 来源出版物 | 中国古生物学会孢粉学分会十届二次学术年会论文摘要集 |
| 出版年 | 2019 |
| 页码 | 1 |
| 语种 | 中文 |
| 中图法分类号 | Q913.84;P532;P534.632 |
| 资源类型 | 会议论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/337305 |
| 作者单位 | 兰州大学资源环境学院西部环境教育部重点实验室 |
| 推荐引用方式 GB/T 7714 | 向丽雄,黄小忠. 盘星藻指示的全新世亚洲中部干旱区与季风边缘区水文-气候异步变化（英文）[C],2019:1. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [向丽雄]的文章 |
| [黄小忠]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [向丽雄]的文章 |
| [黄小忠]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [向丽雄]的文章 |
| [黄小忠]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
