Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13664 |
Warmer night-time temperature promotes microbial heterotrophic activity and modifies stream sediment community | |
Freixa, Anna1,2; Acuna, Vicenc2; Casellas, Maria2; Pecheva, Stoyana3; Romani, Anna M.1 | |
2017-09-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain; Bulgaria |
英文摘要 | Diel temperature patterns are changing because of global warming, with higher temperatures being predicted to be more pronounced at night. Biological reactions are temperature dependent, with some occurring only during the daylight hours (e.g., light photosynthesis) and other during the entire day (e.g., respiration). Consequently, we expect the modification of daily temperature cycles to alter microbial biological reactions in stream sediments. Here, we aimed to study the effect of warming and changes of the diel temperature patterns on stream sediment biofilm functions tied to organic carbon decomposition, as well as on biofilm meiofaunal community structure. We performed an eight-week experiment with 12 artificial streams subjected to three different diel temperature patterns: warming, warmer nights and control. Significant effects of warming on biofilm function and structure were mainly detected in the long term. Our results showed that warming altered biofilm function, especially in the warmer nights' treatment, which enhanced beta-glucosidase enzyme activity. Interestingly, clear opposite diel patterns were observed for dissolved organic carbon and b-glucosidase activity, suggesting that, at night, sediment bacteria quickly consume the input of photosynthetic dissolved organic carbon labile compounds created during light-time. The biofilm structure was also altered by warming, as both warming and warmer night treatments enhanced copepod abundance and diminished abundances of turbellaria and nematodes, which, in turn, controlled bacterial, algal and ciliate communities. Overall, we conclude that warming has strong effect on sediment biofilm structure and enhanced microbial organic matter degradation which might, consequently, affect higher trophic levels and river carbon cycling. |
英文关键词 | artificial streams diel cycles dissolved organic carbon extracellular enzyme activities global warming meiofauna |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406812100032 |
WOS关键词 | DISSOLVED ORGANIC-MATTER ; DIEL FLUCTUATIONS ; FRESH-WATER ; FOOD-WEB ; BACTERIAL PRODUCTION ; MINIMUM TEMPERATURE ; RESPIRATION ; BIOFILM ; CARBON ; PHYTOPLANKTON |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17528 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Girona, Inst Aquat Ecol, Girona, Spain; 2.Catalan Inst Water Res ICRA, Girona, Spain; 3.Sofia Univ, Fac Biol, Sofia, Bulgaria |
推荐引用方式 GB/T 7714 | Freixa, Anna,Acuna, Vicenc,Casellas, Maria,et al. Warmer night-time temperature promotes microbial heterotrophic activity and modifies stream sediment community[J]. GLOBAL CHANGE BIOLOGY,2017,23(9). |
APA | Freixa, Anna,Acuna, Vicenc,Casellas, Maria,Pecheva, Stoyana,&Romani, Anna M..(2017).Warmer night-time temperature promotes microbial heterotrophic activity and modifies stream sediment community.GLOBAL CHANGE BIOLOGY,23(9). |
MLA | Freixa, Anna,et al."Warmer night-time temperature promotes microbial heterotrophic activity and modifies stream sediment community".GLOBAL CHANGE BIOLOGY 23.9(2017). |
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