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| 1 | Diatom Response to Global Warming in Douhu Lake,Southeast China显示文摘A large number of lacustrine sedimentary records indicate that global warming is the main factor leading to significant changes in diatom communities in lakes of the northern hemisphere.However,due to the intensification of human activities since 1850,some scholars have emphasized that the increasing lake trophic level may be the main reason for the changes in diatom communities.The debate is ongoing.In order to avoid falling into the complex relationship between diatom changes and the seasonal cycle that characterizes lakes in mid and high latitudes,we chose a lake located at a low latitude,where the relationship between diatoms and temperature is not indirect but direct.The diatom record spans the past ca.100 years and reveals that the abundance of Aulacoseira granulata increased from 1900 until 1985,replacing the previously dominant Aulacoseira ambigua.These changes are in agreement with the increasing trend in global temperature.Since 1985,the percentages of the small-celled Discostella stelligera and the benthic diatom Navicula heimansioides have increased,while Aulacoseira granulata has decreased.This latest shift is caused by further global warming.We conclude that warming is the main factor leading to changing diatom communities in Douhu Lake. | LI Jingjing WANG Luo CAO Qi Patrick RIOUAL LEI Guoliang CAI Binggui ZHANG Jiaoyang ZOU Yafei YAN Yao WAN Xiaoqiao XIAO Jule | 2021 | Acta Geologica Sinica(English Edition)2021，95，2： | 0 |
| 2 | 黄龙风景区藻席嗜冷硅藻群落结构变化及其驱动因子分析显示文摘硅藻群落对环境变化十分敏感,是自然河流水质变化的指示生物。为了解黄龙风景区藻席及藻席嗜冷硅藻群落结构与环境变量的关系,对景区内8个典型景点进行水样和藻席的采集并分析。结果表明,黄龙风景区藻席是以钙华作为基底,丝状藻作为骨架,栖息着大量硅藻的高寒岩溶微生态系统,共鉴定出25属72种硅藻,其中优势种13种,以桥弯藻属(Cymbella)为主。通过冗余分析发现,水温(F=2.8,P=0.02)和溶解硅(F=2.3,P=0.04)是影响黄龙风景区藻席嗜冷硅藻群落结构特征的主要驱动因子,TN是潜在驱动因子。硅藻可以为高寒岩溶区地表水监测提供重要的补充信息,建立完整的硅藻物种数据库,有利于区域水质监测。 | 饶瀚云 董发勤 刘明学 安德军 代群威 李琼芳 张强 刘轶凡 刘泽灵 张钰婷 | 2023 | 中国岩溶2023，42，3： | 0 |
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