Differential responses of stream water and bed sediment microbial communities to watershed degradation
The importance of microbial communities in the function of lotic ecosystems is unequivocal. However, traditional watershed studies on biodiversity have mostly focused on benthic macroinvertebrates, macroalgae and fish assemblages. Here, we investigated the diversity and interaction patterns of micro...
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doaj-6a9db6f68d7d4ed38f8f3529f8a8855a2020-11-24T21:23:15ZengElsevierEnvironment International0160-41202020-01-01134Differential responses of stream water and bed sediment microbial communities to watershed degradationHehuan Liao0Jiun Yang Yen1Yingjie Guan2Dongfang Ke3Chongxuan Liu4School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China; College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Corresponding authors at: School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.Carnegie’s Department of Plant Biology, Stanford, CA 94305, USACollege of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518055, ChinaSchool of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, ChinaSchool of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China; Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China; State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China; Corresponding authors at: School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China.The importance of microbial communities in the function of lotic ecosystems is unequivocal. However, traditional watershed studies on biodiversity have mostly focused on benthic macroinvertebrates, macroalgae and fish assemblages. Here, we investigated the diversity and interaction patterns of microbial communities in water and bed sediment of streams impacted by intensive watershed activities versus streams with relatively pristine conditions via next-generation sequencing of 16S rRNA amplicons using Illumina HiSeq platform. Both water and sediment microbial communities at forested sites had higher mean alpha-diversity than developed sites. Although microbial alpha-diversity indices were generally higher in bed sediment than water, they were comparable at forested sites. In addition, losses of taxa important in nitrogen cycle were evident particularly in bed sediment of developed sites. Interactions among microorganisms visualized by microbial network were more complex at forested sites versus developed sites, with more keystone taxa predominantly from sediment. Together, these findings suggest stream water and bed sediment microbial communities may be affected by watershed disturbances in distinctive ways, and losses of important functional microbial players and keystone taxa in bed sediment may result in decline of ecosystem functions and services. Therefore, cautions should be taken when implementing remediation strategies such as sediment dredging, and reseeding contaminated sites with key microbial players may catalyze the recovery of ecosystems. Keywords: Bed sediment, Next-generation sequencing, Keystone taxa, Microbial network, Watershed degradationhttp://www.sciencedirect.com/science/article/pii/S0160412019319944 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hehuan Liao Jiun Yang Yen Yingjie Guan Dongfang Ke Chongxuan Liu |
spellingShingle |
Hehuan Liao Jiun Yang Yen Yingjie Guan Dongfang Ke Chongxuan Liu Differential responses of stream water and bed sediment microbial communities to watershed degradation Environment International |
author_facet |
Hehuan Liao Jiun Yang Yen Yingjie Guan Dongfang Ke Chongxuan Liu |
author_sort |
Hehuan Liao |
title |
Differential responses of stream water and bed sediment microbial communities to watershed degradation |
title_short |
Differential responses of stream water and bed sediment microbial communities to watershed degradation |
title_full |
Differential responses of stream water and bed sediment microbial communities to watershed degradation |
title_fullStr |
Differential responses of stream water and bed sediment microbial communities to watershed degradation |
title_full_unstemmed |
Differential responses of stream water and bed sediment microbial communities to watershed degradation |
title_sort |
differential responses of stream water and bed sediment microbial communities to watershed degradation |
publisher |
Elsevier |
series |
Environment International |
issn |
0160-4120 |
publishDate |
2020-01-01 |
description |
The importance of microbial communities in the function of lotic ecosystems is unequivocal. However, traditional watershed studies on biodiversity have mostly focused on benthic macroinvertebrates, macroalgae and fish assemblages. Here, we investigated the diversity and interaction patterns of microbial communities in water and bed sediment of streams impacted by intensive watershed activities versus streams with relatively pristine conditions via next-generation sequencing of 16S rRNA amplicons using Illumina HiSeq platform. Both water and sediment microbial communities at forested sites had higher mean alpha-diversity than developed sites. Although microbial alpha-diversity indices were generally higher in bed sediment than water, they were comparable at forested sites. In addition, losses of taxa important in nitrogen cycle were evident particularly in bed sediment of developed sites. Interactions among microorganisms visualized by microbial network were more complex at forested sites versus developed sites, with more keystone taxa predominantly from sediment. Together, these findings suggest stream water and bed sediment microbial communities may be affected by watershed disturbances in distinctive ways, and losses of important functional microbial players and keystone taxa in bed sediment may result in decline of ecosystem functions and services. Therefore, cautions should be taken when implementing remediation strategies such as sediment dredging, and reseeding contaminated sites with key microbial players may catalyze the recovery of ecosystems. Keywords: Bed sediment, Next-generation sequencing, Keystone taxa, Microbial network, Watershed degradation |
url |
http://www.sciencedirect.com/science/article/pii/S0160412019319944 |
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