Zigui Ecological Station for Three Gorges Dam Project, State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, People's Republic of China.
College of Resource and Environment, University of Chinese Academy of Sciences, Beijing, People's Republic of China.
Environ Technol. 2021 Mar;42(8):1145-1154. doi: 10.1080/09593330.2019.1659422. Epub 2019 Aug 27.
Temperature can fluctuate widely between different seasons, and this may greatly impact many biological processes. However, little is known about its influence on the functioning of benthic microbial communities. Here we investigated the nutrient accumulation capability of periphytic biofilm under temperature fluctuations (17-35°C). Periphytic biofilm maintained the same nutrient accumulation capacity after experiencing the 'warming-hot-cooling' temperature fluctuation under both lab and outdoor conditions as those without temperature disturbance. In response to temperature increase, both community composition and species richness changed greatly and the increase in biodiversity was identified as being the underlying mechanism boosting the sustainable function in nutrient accumulation, indicating zero net effects of community changes. These findings provide insights into the underlying mechanisms of how benthic microbial communities adapt to temperature fluctuations to maintain nutrient accumulation capacity and elucidate that periphytic biofilm plays important roles in influencing nutrient cycling in aquatic ecosystems under temperature changes such as seasonal fluctuations.
温度在不同季节会有很大波动，这可能会极大地影响许多生物过程。然而，人们对其如何影响底栖微生物群落的功能知之甚少。在这里，我们研究了温度波动（17-35°C）下附生生物膜的养分积累能力。在实验室和户外条件下，附生生物膜在经历了“升温-高热-降温”的温度波动后，仍然保持着与未受温度干扰时相同的养分积累能力。随着温度的升高，群落组成和物种丰富度发生了巨大变化，生物多样性的增加被确定为促进养分积累可持续功能的潜在机制，表明群落变化没有净效应。这些发现为底栖微生物群落如何适应温度波动以维持养分积累能力提供了深入的了解，并阐明了在温度变化（如季节性波动）下，附生生物膜在影响水生生态系统养分循环方面发挥着重要作用。
