Interactions between hydrology and water chemistry shape bacterioplankton biogeography across boreal freshwater networks

Niño-García, Juan Pablo; Ruiz‐González, Clara; Giorgio, Paul A. del

doi:10.1038/ismej.2015.226

Cited by 178 publications

(236 citation statements)

References 54 publications

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“…400 streams, rivers and lakes), its role as a driver of taxonomic differences was much more important in large rivers and lakes than in headwater streams where water residence times are shorter. The observed response to pH in fast-flowing streams was interpreted as a signature of the landscape past environmental conditions (Niño-García et al, 2016a) rather than to in-stream selection. Since this was done considering the overall communities, which harbour both types of populations, it is possible that more clear links between environmental drivers and taxonomy will appear considering the two populations separately.…”

Section: Contrasting Dynamics and Environmental Controls Of Dispersedmentioning

confidence: 99%

“…In this regard, Crump et al (2007) suggested that bacteria transported by advection from upstream sources should constitute a small fraction of the total cells in systems with water residence times longer than bacterial doubling times. Other studies have explicitly explored the dynamics of different groups of bacterial taxa, showing that, whereas communities at the origin of the hydrologic continuum (i.e., in the smallest headwater streams) are mostly dominated by taxa washed from soils that likely cannot thrive in aquatic systems, downstream systems with longer water residence times mostly comprise typical freshwater taxa adapted to local conditions (Savio et al, 2015;Ruiz-González et al, 2015a;Niño-García et al, 2016a). Related to this, Niño-García et al, (2016a) found that, although pH seemed to shape bacterial communities along the whole aquatic continuum in the boreal landscape (ca.…”

Section: Contrasting Dynamics and Environmental Controls Of Dispersedmentioning

confidence: 99%

“…Other studies have explicitly explored the dynamics of different groups of bacterial taxa, showing that, whereas communities at the origin of the hydrologic continuum (i.e., in the smallest headwater streams) are mostly dominated by taxa washed from soils that likely cannot thrive in aquatic systems, downstream systems with longer water residence times mostly comprise typical freshwater taxa adapted to local conditions (Savio et al, 2015;Ruiz-González et al, 2015a;Niño-García et al, 2016a). Related to this, Niño-García et al, (2016a) found that, although pH seemed to shape bacterial communities along the whole aquatic continuum in the boreal landscape (ca. 400 streams, rivers and lakes), its role as a driver of taxonomic differences was much more important in large rivers and lakes than in headwater streams where water residence times are shorter.…”

Section: Contrasting Dynamics and Environmental Controls Of Dispersedmentioning

confidence: 99%

“…This results in a diAdvances in Oceanography and Limnology, 2017;8(2): 222-234 ARTICLE DOI: 10.4081/aiol.2017.7232 This work is licensed under a Creative Commons . rectional structuring of aquatic communities and a gradual decrease in taxonomic richness that has been observed both along individual rivers (Savio et al 2015) or across multiple unconnected aquatic sites (Ruiz-González et al, 2015a;Niño-García et al 2016a). More importantly, however, some of these transported soil bacteria seem to be able to grow during transit in the water and to dominate freshwater bacterioplankton communities when the water residence time is long enough, i.e., in large rivers and lakes (Crump et al 2012, Ruiz-González et al, 2015a.…”

Section: Introductionmentioning

confidence: 99%

“…For example, terrestrial runoff causes the advection of high numbers of bacterial taxa to aquatic bodies, and consequently the systems most tightly connected to the landscape will be more strongly influenced by this transport of terrestrial bacteria. Although headwater streams have been suggested to act as integrators and vectors of microbial diversity from soil sources (Crump et al, 2007;Nelson et al, 2009;Besemer et al, 2012Besemer et al, , 2013, only a few studies have directly explored this (Savio et al 2015;Ruiz-González et al, 2015a;Niño-García et al 2016a), showing that most of these dispersed bacteria, which dominate communities in headwaters, gradually disappear along the river continuum. This results in a diAdvances in Oceanography and Limnology, 2017;8(2): 222-234 ARTICLE DOI: 10.4081/aiol.2017.7232 This work is licensed under a Creative Commons .…”

Section: Introductionmentioning

confidence: 99%

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Contrasting dynamics and environmental controls of dispersed bacteria along a hydrologic gradient

et al. 2017

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Freshwater bacterioplankton communities are influenced by the transport of bacteria from the surrounding terrestrial environments. It has been shown that, although most of these dispersed bacteria gradually disappear along the hydrologic continuum, some can thrive in aquatic systems and become dominant, leading to a gradual succession of communities. Here we aimed at exploring the environmental factors driving the structure of such contrasting bacterial populations as well as their functional properties. Using Illumina sequencing of the 16S rRNA gene, we characterized the taxonomic composition of bacterioplankton communities from 10 streams and rivers in Québec spanning the whole hydrologic continuum (river Strahler order 0 to 7), which were sampled in two occasions. With the aim to understand the fate and controls of the transported bacteria, among the taxa present at the origin of the hydrologic gradient (i.e., in the smallest headwater streams) we identified two types of dynamics: i) 'Tourist' taxa, which were those that decreased in abundance from the headwaters towards the largest rivers, and ii) 'Seed' taxa, those that increased their abundances along the hydrologic continuum. Communities changed gradually from the fast-flowing headwater streams dominated by 'Tourist' taxa (ca. 95% of the sequences) towards the largest rivers (Strahler order 4-7) where 'Seed' taxa comprised up to 80% of community sequences. Variation in taxonomic composition of the communities dominated by 'Tourist' taxa in streams seemed related to different degree of terrestrial inputs, whereas compositional changes in 'Seed' communities in the large rivers were linked to differences in autochthonous processes. Finally, the two types of communities differed significantly in their metabolic potential assessed through Biolog Ecoplates. All this suggests that hydrologic transport modulates the gradual replacement of two contrasting population types subjected to different environmental controls and with different metabolic potentials. Moreover, we show that the separate exploration of the two pools of taxa allows unveiling environmental drivers and processes operating on them that remain hidden if explored at the whole community level.

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Section: Contrasting Dynamics and Environmental Controls Of Dispersedmentioning

confidence: 99%

Section: Contrasting Dynamics and Environmental Controls Of Dispersedmentioning

confidence: 99%

Section: Contrasting Dynamics and Environmental Controls Of Dispersedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Contrasting dynamics and environmental controls of dispersed bacteria along a hydrologic gradient

et al. 2017

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Deconvolution model to resolve cytometric microbial community patterns in flowing waters

et al. 2017

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Flow cytometry is suitable to discriminate and quantify aquatic microbial cells within a spectrum of fluorescence and light scatter signals. Using fixed gating and operational settings, we developed a finite distribution mixture model, followed by the Voronoi tessellation, to resolve bivariate cytometric profiles into cohesive subgroups of events. This procedure was applied to outline recurrent patterns and quantitative changes of the aquatic microbial community along a river hydrologic continuum. We found five major subgroups within each of the commonly retrieved populations of cells with Low and High content of Nucleic Acids (namely, LNA, and HNA cells). Moreover, the advanced analysis allowed assessing changes of community patterns perturbed by a wastewater feed. Our approach for cytometric data deconvolution confirmed that flow cytometry could represent a prime candidate technology for assessing microbial community patterns in flowing waters. © 2017 International Society for Advancement of Cytometry.

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Nutrient dynamics and stream order influence microbial community patterns along a 2914 kilometer transect of the Mississippi River

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Hanssen

Spooner

et al. 2018

Limnology & Oceanography

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Draining 31 states and roughly 3 million km 2 , the Mississippi River (MSR) and its tributaries constitute an essential resource to millions of people for clean drinking water, transportation, agriculture, and industry. Since the turn of the 20 th century, MSR water quality has continually rated poorly due to human activity.Acting as first responders, microorganisms can mitigate, exacerbate, and/or serve as predictors for water quality, yet we know little about their community structure or ecology at the whole river scale for large rivers. We collected both biological (16S and 18S rRNA gene amplicons) and physicochemical data from 38 MSR sites over nearly 3000 km from Minnesota to the Gulf of Mexico. Our results revealed a microbial community composed of similar taxa to other rivers but with unique trends in the relative abundance patterns among phyla, operational taxonomic units (OTUs), and the core microbiome. Furthermore, we observed a separation in microbial communities that mirrored the transition from an 8 th to 10 th Strahler order river at the Missouri River confluence, marking a different start to the lower MSR than the historical distinction at the Ohio River confluence in Cairo, IL. Within MSR microbial assemblages, we identified subgroups of OTUs from the phyla Acidobacteria, Bacteroidetes, Oomycetes, and Heterokonts that were associated with, and predictive of, the important eutrophication nutrients nitrate and phosphate. This study offers the most comprehensive view of MSR microbiota to date, provides important groundwork for higher resolution microbial studies of river perturbation, and identifies potential microbial indicators of river health related to eutrophication.

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Interactions between hydrology and water chemistry shape bacterioplankton biogeography across boreal freshwater networks

Cited by 178 publications

References 54 publications

Contrasting dynamics and environmental controls of dispersed bacteria along a hydrologic gradient

Contrasting dynamics and environmental controls of dispersed bacteria along a hydrologic gradient

Deconvolution model to resolve cytometric microbial community patterns in flowing waters

Nutrient dynamics and stream order influence microbial community patterns along a 2914 kilometer transect of the Mississippi River

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