A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Differential responses of stream water and bed sediment microbial communities to watershed degradation
Graphical abstract Display Omitted
Highlights Higher water and sediment microbial α-diversity at forested versus developed sites. Higher sediment microbial α-diversity than water at developed sites. Comparable microbial α-diversity of sediment and water at forested sites. Notable losses of microbial players in nitrogen cycle in sediment at developed sites. Complex microbial network at forested sites with abundant keystone taxa in sediment.
Abstract 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.
Differential responses of stream water and bed sediment microbial communities to watershed degradation
Graphical abstract Display Omitted
Highlights Higher water and sediment microbial α-diversity at forested versus developed sites. Higher sediment microbial α-diversity than water at developed sites. Comparable microbial α-diversity of sediment and water at forested sites. Notable losses of microbial players in nitrogen cycle in sediment at developed sites. Complex microbial network at forested sites with abundant keystone taxa in sediment.
Abstract 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.
Differential responses of stream water and bed sediment microbial communities to watershed degradation
Liao, Hehuan (author) / Yen, Jiun Yang (author) / Guan, Yingjie (author) / Ke, Dongfang (author) / Liu, Chongxuan (author)
2019-09-18
Article (Journal)
Electronic Resource
English
| DOAJ | 2020
| British Library Online Contents | 2007
Assessment of Stream Restoration for Reduction of Sediment in a Large Agricultural Watershed
| British Library Online Contents | 2018
Surface reflectance degradation by microbial communities
| SAGE Publications | 2016