2024年6月29日，Elsevier 旗下地球科学领域top期刊《Quaternary Science Reviews》（影响因子：3.2）在线发表了云南师范大学地理学部孙惠玲教授最新研究成果《Response of aquatic ammonia-oxidizing archaea to thermal stratification and nutrient levels since the Last Glacial Maximum in the deep lake Fuxian, southwestern China》。云南师范大学地理学部为第一作者单位，孙惠玲教授为通讯作者。合作单位为中国地质大学（武汉）（ China University of Geosciences,）、英国南安普顿大学（University of Southampton）和云南大学（Yunnan University）。

https://www.sciencedirect.com/science/article/abs/pii/S0277379124002907

Abstract

Ammonia-oxidizing archaea (AOA) are the critical nitrifier in lake ecosystems and participate in the global nitrogen cycle. However, the response of aquatic AOA to long-term climate change remains unclear. Here, we obtained a continuous sediment record from a deep, oligotrophic lake (Lake Fuxian, China) and reconstructed changes in AOA productivity over the past 26 thousand years (cal ka BP) using a multi-proxy approach. AOA productivity (estimated using diagnostic archaeal lipids) was low during the Last Glacial Maximum (LGM) before peaking during the cold-dry Heinrich event 1 (H1, 17.7–15.9 cal ka BP). As the Indian Summer Monsoon (ISM) intensified and the climate became warmer and wetter, aquatic AOA productivity progressively declined. We show that a combination of factors modulates millennial-scale AOA productivity. In particular, low lake levels under cold-dry climate conditions strengthen lake mixing and nutrient upwelling, promoting AOA productivity; in contrast, high lake levels during warm-humid climate conditions weaken upwelling, resulting in reduced AOA blooms. Changes in terrestrial nutrient availability also exert a secondary control on aquatic primary production and by extension, AOA productivity. We also show that anthropogenic human activities can potentially alter AOA productivity levels due to climate and land-use change.

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云师大孙惠玲在环境类期刊《Science of The Total Environment》发表最新研究成果