水文气候波动下云南太平水库硅藻群落演替的长期特征

doi:10.13287/j.1001-9332.202102.016

应用生态学报 ›› 2021, Vol. 32 ›› Issue (2): 661-671.doi: 10.13287/j.1001-9332.202102.016

水文气候波动下云南太平水库硅藻群落演替的长期特征

韩桥花, 陈小林, 陈光杰, 孔令阳^*, 李蕊, 王露

云南省高原地理过程与环境变化重点实验室, 云南师范大学地理学部, 昆明 650500

收稿日期:2020-07-13 接受日期:2020-11-27 出版日期:2021-02-15 发布日期:2021-08-15
通讯作者: ^*E-mail: kly_ynnu@163.com
作者简介:韩桥花, 女, 1993年生, 硕士研究生。主要从事湖泊沉积与环境变化研究。E-mail: hqh0207@163.com
基金资助:
国家自然科学基金项目(41771239,41807446)、科技部国家重点研发计划项目(2017YFA0605202)和云南省教育厅科学研究基金项目(2018JS149)资助

Long-term succession of diatom community under hydro-climatic fluctuations in Taiping Reservoir, Yunnan Province, China

HAN Qiao-hua, CHEN Xiao-lin, CHEN Guang-jie, KONG Ling-yang^*, LI Rui, WANG Lu

Yunnan Key Laboratory of Plateau Geographical Processes and Environmental Change, Faculty of Geography, Yunnan Normal University, Kunming 650500, China

Received:2020-07-13 Accepted:2020-11-27 Online:2021-02-15 Published:2021-08-15
Contact: ^*E-mail: kly_ynnu@163.com
Supported by:
National Natural Science Foundation of China (41771239, 41807446), the National Key R&D Program of China (2017YFA0605202), and the Science Research Foundation of Education Department of Yunnan Province (2018JS149)

摘要/Abstract

摘要： 在区域气候变暖的背景下,干旱事件引起的水位频繁波动以及流域开发导致的污染物输入均可以直接威胁水库的生态安全。本研究以云南省太平水库为对象,通过对沉积物的物理(粒度、烧失量)、化学(碳、氮元素)、生物(硅藻群落)等代用指标的分析,并结合监测数据和调查资料,重建了该水库1937—2018年的生态环境变化过程,并识别了硅藻群落的演替特征及其环境影响因子。粒度结果指示,太平水库在筑坝期间(1956—1984年)水动力逐渐增强,而后水动力条件持续减弱,与文献记录的水文调控历史基本一致。总氮、总碳和有机质含量较为一致地记录了水库建设期间水体营养水平的下降、水库建成后初级生产力和内源有机质的上升过程。硅藻群落呈现出“浮游种-底栖种-浮游种”交替占优的演化模式。驱动太平水库硅藻群落演替的主要环境因子为气候变化、水动力条件和营养水平。在气候长期变暖的背景下,严格控制外源营养输入并合理开展水文调控是维持水库水体生态健康和环境安全的重要前提。

关键词: 气候变化, 水文波动, 沉积物, 硅藻, 太平水库

Abstract: Under the background of regional climate warming, frequent fluctuation of water level caused by drought events and pollutant influx due to catchment development can directly threaten the ecological safety of reservoirs. Through the analysis of physical (particle size, loss on ignition), chemical (carbon, nitrogen), biological (diatom community) and other substitute indicators of sediment, combined with monitoring data and investigation data, we reconstructed the environmental changes in Taiping Reservoir in Yunnan Province from 1937 to 2018, and analyzed the succession characteristics of diatom community and its environmental impact factors. The grain size records indicated that the hydrodynamic condition of Taiping Reservoir was increased during the impounding period (1956-1984) and was steadily reduced thereafter, corresponding well with the documented history of reservoir construction and hydrologic regulation. Changes of total nitrogen, total carbon and organic matter contents indicated the decline of water nutrient level during the construction of the reservoir and the rising process of primary productivity and endogenous organic matter after the completion of the reservoir. The dominant taxa of diatom community shifted from planktonic species to benthic species and then to planktonic ones. The main factors driving the succession of diatom community in Taiping Reservoir were climate change, hydrodynamic condition, and nutrient level. Under the background of long-term climate warming, strict controlling exogenous nutrition input, and reasonable hydrological regulation would be the important premise to maintain ecological health and environmental safety of reservoir water.

Key words: climate change, hydrological fluctuation, sediment, diatom, Taiping Reservoir

韩桥花, 陈小林, 陈光杰, 孔令阳, 李蕊, 王露. 水文气候波动下云南太平水库硅藻群落演替的长期特征[J]. 应用生态学报, 2021, 32(2): 661-671.

HAN Qiao-hua, CHEN Xiao-lin, CHEN Guang-jie, KONG Ling-yang, LI Rui, WANG Lu. Long-term succession of diatom community under hydro-climatic fluctuations in Taiping Reservoir, Yunnan Province, China[J]. Chinese Journal of Applied Ecology, 2021, 32(2): 661-671.

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水文气候波动下云南太平水库硅藻群落演替的长期特征

Long-term succession of diatom community under hydro-climatic fluctuations in Taiping Reservoir, Yunnan Province, China

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