欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2020, Vol. 31 ›› Issue (5): 1725-1734.doi: 10.13287/j.1001-9332.202005.037

• 研究论文 • 上一篇    下一篇

云南程海湖泊系统响应富营养化与水文调控的长期模式

刘园园, 陈光杰*, 黄林培, 陈子栋, 黄广才, 刘晓龙, 李蕊   

  1. 云南师范大学旅游与地理科学学院高原地理过程与环境变化云南省重点实验室, 昆明 650500
  • 收稿日期:2019-10-29 出版日期:2020-05-15 发布日期:2020-05-15
  • 通讯作者: * E-mail: guangjiechen@gmail.com
  • 作者简介:刘园园, 女, 1989年生, 博士研究生。主要从事湖泊沉积与全球变化研究。E-mail: rslyy88@163.com
  • 基金资助:
    国家重点研究发展计划项目(2017YFA0605202)、国家自然科学基金项目(41771239,U1133601)和云南省教育厅科学研究基金研究生项目(01300205020503157)资助

Long-term pattern of lake ecosystem in response to eutrophication and water regulation in Chenghai Lake, Yunnan, China

LIU Yuan-yuan, CHEN Guang-jie*, HUANG Lin-pei, CHEN Zi-dong, HUANG Guang-cai, LIU Xiao-long, LI Rui   

  1. Yunnan Province Key Laboratory of Plateau Geographical Processes and Environmental Change, School of Tourism and Geography, Yunnan Normal University, Kunming 650500, China
  • Received:2019-10-29 Online:2020-05-15 Published:2020-05-15
  • Contact: * E-mail: guangjiechen@gmail.com
  • Supported by:
    This work was supported by the National Key Research and Development Plan (2017YFA0605202), the National Natural Science Foundation of China (41771239, U1133601), and the Graduate Program of Science Research Foundation of Education Department of Yunnan Province (01300205020503157).

摘要: 流域开发和气候变化背景下,逐渐增强的人类活动已经显著影响湖泊系统演替及功能。本研究以云南程海为研究对象,通过对程海湖泊沉积物记录与现代调查数据相结合,重建了程海近250年来的生态环境变化过程,探讨了程海湖泊系统在富营养化以及水文波动等多重环境压力影响下的长期响应模式。结果表明: 1970年之前程海营养水平整体偏低,1970—2000年间缓慢增长,2000年后快速增加,初级生产力呈长期上升趋势。1993—2000年期间,引水工程显著增加了湖泊水动力强度和物种扩散能力,促进了直链藻和菱形藻的增加。程海沉积物记录的碳循环变化主要受内源输入的长期影响。富营养化是硅藻群落长期演替的主要驱动因子,其次是湖泊水动力条件的波动。对程海的生态修复与流域管理不仅需要关注水体营养盐的富集与流域污染物的控制,同时还要考虑到湖泊水文调控和水位波动的影响。

关键词: 程海, 沉积物, 硅藻, 水体总有机碳, 富营养化, 水文调控

Abstract: In the context of catchment development and climate change, anthropogenic activities have significantly altered the succession and functioning of freshwater ecosystems. Combining the sedimentary records and modern survey data, we reconstructed a 250-year history of ecological changes in Chenghai Lake, aiming to assess the long-term ecological changes in Changhai Lake in response to multiple environmental stresses, such as eutrophication and hydrological fluctuation.Three stages were identified for the process of nutrient enrichment leading to a long-term increase in primary production. Nutrient level was relatively low before 1970, increased gradually between 1970 and 2000, with an accelerating increase after 2000. The water regulation project enhanced water turbulence and river flux during 1993—2000, which promoted the growth of turbulence-tolerant Aulacoseira and influx of benthic Nitzschia. The organic carbon cycling in Chenghai Lake was mainly driven by the autogenetic inputs. The eutrophication process dominated the long-term shifts of diatom assemblages followed by hydrological fluctuation. Our results illustrated that ecological restoration and catchment management of Chenghai Lake not only need to focus on the control of nutrient enrichment and pollutant input, but also should consider hydrological regulation and water level fluctuation.

Key words: Chenghai Lake, sediment, diatoms, lake-water total organic carbon, eutrophication, water regulation