2024年6月29日，Elsevier 旗下top期刊《Ecological Indicators》（影响因子：7.0）在线发表了云南师范大学地理学部赵磊教授最新研究成果《Self-supported iron-doped cobalt–copper oxide heterostructures for efficient electrocatalytic denitrification》。云南师范大学地理学部为第一作者单位，赵磊教授为通讯作者。合作单位为云南省生态环境厅（Department of Ecology and Environment of Yunnan Province, China）、云南省生态环境监测中心（Ecological and Environmental Monitoring Centre of Yunnan Province）。

https://www.sciencedirect.com/science/article/pii/S1470160X24007581

Abstract

The theory of regime shift is rooted in the concept of fold catastrophe and posits the existence of alternative stable states, such as a lake dominated by phytoplankton or macrophytes under similar environmental conditions. Although regime shifts have been reported in many shallow lakes, recent evidence has revealed that a linear rather than dual relationship between chlorophyll-a (Chla) and nutrients is more common, indicating that regime shifts are rare in nature. Here, long-term field observations and the coverage of the submerged macrophyte area (SMA) retrieved from remote sensing (RS) images of Yilong Lake, in which regime shifts have been reported, were used to re-examine the presence or absence of regime shifts and to explore the drivers of abrupt changes. During the past three decades, Yilong Lake has experienced three abrupt changes in water quality, phytoplankton biomass (Chla) and the SMA. However, the relationship between Chla and nutrients was significantly linear, and the state variables (Chla, Secchi depth and SMA) changed along the gradient of environmental stress, which demonstrates the absence of regime shifts and instead highlights the presence of marked interannual changes. Moreover, we found that nutrients and water depth are the main environmental factors driving the establishment/collapse of the SMA and shaping the relative dominance of phytoplankton over the SMA, further inducing rapid changes in nutrient cycling and water quality in Yilong Lake. The significant interannual variability in the SMA and Chla in Yilong Lake reflects a pronounced weakening of resilience. To enhance resilience, an adaptive strategy involving external nutrient loading reduction, water level management and biodiversity restoration is proposed.

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云师大地理学部赵磊副教授在《Water Research》上发表湖泊营养相关研究最新成果