期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 635, 期 -, 页码 1152-1159出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2018.04.199
关键词
Microplastics; Microorganisms; Biofilms; Total biomass; Heterotrophic activity; Functional diversity; Multi-functionality index
资金
- Leibniz SAW project MikrOMIK [SAW-2014-IOW-2]
- Ministry of Science and Technology, Taiwan [MOST104-2621-B-002-005-MY3]
- Alexander von Humboldt Foundation (Humboldt Research Fellowship for Experienced Researchers), Germany
Heterotrophic microbes with the capability to process considerable amounts of organic matter can colonize microplastic particles (MP) in aquatic ecosystems. Weather colonization of microorganisms on MP will alter ecological niche and functioning of microbial communities remains still unanswered. Therefore, we compared the functional diversity of biofilms on microplastics when incubated in three lakes in northeastern Germany differing in trophy and limnological features. For all lakes, we compared heterotrophic activities of MP biofilms with those of microorganisms in the surrounding water by using Biolog (R) EcoPlates and assessed their oxygen consumption in microcosm assays with and without MP. The present study found that the total biofilm biomass was higher in the oligo-mesotrophic and dystrophic lakes than in the eutrophic lake. In all lakes, functional diversity profiles of MP biofilms consistently differed from those in the surrounding water. However, solely in the oligo-mesotrophic lake MP biofilms had a higher functional richness compared to the ambient water. These results demonstrate that the functionality and hence the ecological role of MP-associated microbial communities are context-dependent, i.e. different environments lead to substantial changes in biomass build up and heterotrophic activities of MP biofilms. We propose that MP surfaces act as new niches for aquatic microorganisms and that the constantly increasing MP pollution has the potential to globally impact carbon dynamics of pelagic environments by altering heterotrophic activities. (C) 2018 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据