Watershed Urbanization Alters the Composition and Function of Stream Bacterial Communities
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{"title"=>"Watershed urbanization alters the composition and function of stream bacterial communities", "type"=>"journal", "authors"=>[{"first_name"=>"Si Yi", "last_name"=>"Wang", "scopus_author_id"=>"47062252100"}, {"first_name"=>"Elizabeth B.", "last_name"=>"Sudduth", "scopus_author_id"=>"14021945100"}, {"first_name"=>"Matthew D.", "last_name"=>"Wallenstein", "scopus_author_id"=>"9241886700"}, {"first_name"=>"Justin P.", "last_name"=>"Wright", "scopus_author_id"=>"7601526734"}, {"first_name"=>"Emily S.", "last_name"=>"Bernhardt", "scopus_author_id"=>"7007044685"}], "year"=>2011, "source"=>"PLoS ONE", "identifiers"=>{"issn"=>"19326203", "scopus"=>"2-s2.0-80051607472", "pui"=>"362336080", "doi"=>"10.1371/journal.pone.0022972", "isbn"=>"1932-6203", "sgr"=>"80051607472", "pmid"=>"21857975"}, "id"=>"79b7112d-b3f8-3b20-8da6-26434a39b502", "abstract"=>"Watershed urbanization leads to dramatic changes in draining streams, with urban streams receiving a high frequency of scouring flows, together with the nutrient, contaminant, and thermal pollution associated with urbanization. These changes are known to cause significant losses of sensitive insect and fish species from urban streams, yet little is known about how these changes affect the composition and function of stream microbial communities. Over the course of two years, we repeatedly sampled sediments from eight central North Carolina streams affected to varying degrees by watershed urbanization. For each stream and sampling date, we characterized both overall and denitrifying bacterial communities and measured denitrification potentials. Denitrification is an ecologically important process, mediated by denitrifying bacteria that use nitrate and organic carbon as substrates. Differences in overall and denitrifying bacterial community composition were strongly associated with the gradient in urbanization. Denitrification potentials, which varied widely, were not significantly associated with substrate supply. By incorporating information on the community composition of denitrifying bacteria together with substrate supply in a linear mixed-effects model, we explained 45% of the variation in denitrification potential (p-value<0.001). Our results suggest that (1) the composition of stream bacterial communities change in response to watershed urbanization and (2) such changes may have important consequences for critical ecosystem functions such as denitrification.", "link"=>"http://www.mendeley.com/research/watershed-urbanization-alters-composition-function-stream-bacterial-communities", "reader_count"=>80, "reader_count_by_academic_status"=>{"Unspecified"=>1, "Professor > Associate Professor"=>7, "Researcher"=>16, "Student > Doctoral Student"=>5, "Student > Ph. D. Student"=>18, "Student > Postgraduate"=>3, "Student > Master"=>17, "Student > Bachelor"=>10, "Professor"=>3}, "reader_count_by_user_role"=>{"Unspecified"=>1, "Professor > Associate Professor"=>7, "Researcher"=>16, "Student > Doctoral Student"=>5, "Student > Ph. D. Student"=>18, "Student > Postgraduate"=>3, "Student > Master"=>17, "Student > Bachelor"=>10, "Professor"=>3}, "reader_count_by_subject_area"=>{"Engineering"=>2, "Unspecified"=>2, "Environmental Science"=>28, "Biochemistry, Genetics and Molecular Biology"=>1, "Agricultural and Biological Sciences"=>42, "Arts and Humanities"=>1, "Computer Science"=>1, "Immunology and Microbiology"=>1, "Earth and Planetary Sciences"=>2}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>2}, "Immunology and Microbiology"=>{"Immunology and Microbiology"=>1}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>2}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>42}, "Computer Science"=>{"Computer Science"=>1}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>1}, "Unspecified"=>{"Unspecified"=>2}, "Environmental Science"=>{"Environmental Science"=>28}, "Arts and Humanities"=>{"Arts and Humanities"=>1}}, "reader_count_by_country"=>{"Puerto Rico"=>1, "United States"=>4, "Brazil"=>1, "Slovenia"=>1}, "group_count"=>2}

Scopus | Further Information

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/745924"], "description"=>"<p>Each point represents the community in a study stream on a particular sampling date. Black circles are streams in watersheds with high percent impervious cover (% IC). Green triangles are streams in watersheds with intermediate % IC. Blue squares are streams in watersheds with low % IC. Values given in parentheses following axes titles are estimated R<sup>2</sup> values for individual axes. All three NMS ordinations had a final solution with three dimensions. Total R<sup>2</sup> values for overall bacterial, <i>nirK</i>, and <i>nosZ</i> ordinations were 0.70, 0.55, and 0.59, respectively.</p>", "links"=>[], "tags"=>["multidimensional", "scaling", "ordination", "bacterial", "denitrifier", "communities", "presence-absence", "trflp"], "article_id"=>416288, "categories"=>["Inorganic Chemistry", "Ecology"], "users"=>["Si-Yi Wang", "Elizabeth B. Sudduth", "Matthew D. Wallenstein", "Justin P. Wright", "Emily S. Bernhardt"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0022972.g002", "stats"=>{"downloads"=>3, "page_views"=>9, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Non_metric_multidimensional_scaling_NMS_ordination_of_overall_bacterial_and_nirK_and_nosZ_denitrifier_communities_based_on_presence_absence_TRFLP_terminal_restriction_fragment_length_polymorphism_data_/416288", "title"=>"Non-metric multidimensional scaling (NMS) ordination of overall bacterial and <i>nirK</i> and <i>nosZ</i> denitrifier communities based on presence-absence TRFLP (terminal restriction fragment length polymorphism) data.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2011-08-12 01:44:48"}
  • {"files"=>["https://ndownloader.figshare.com/files/376086", "https://ndownloader.figshare.com/files/376121", "https://ndownloader.figshare.com/files/376159", "https://ndownloader.figshare.com/files/376193", "https://ndownloader.figshare.com/files/376226", "https://ndownloader.figshare.com/files/376253"], "description"=>"<div><p>Watershed urbanization leads to dramatic changes in draining streams, with urban streams receiving a high frequency of scouring flows, together with the nutrient, contaminant, and thermal pollution associated with urbanization. These changes are known to cause significant losses of sensitive insect and fish species from urban streams, yet little is known about how these changes affect the composition and function of stream microbial communities. Over the course of two years, we repeatedly sampled sediments from eight central North Carolina streams affected to varying degrees by watershed urbanization. For each stream and sampling date, we characterized both overall and denitrifying bacterial communities and measured denitrification potentials. Denitrification is an ecologically important process, mediated by denitrifying bacteria that use nitrate and organic carbon as substrates. Differences in overall and denitrifying bacterial community composition were strongly associated with the gradient in urbanization. Denitrification potentials, which varied widely, were not significantly associated with substrate supply. By incorporating information on the community composition of denitrifying bacteria together with substrate supply in a linear mixed-effects model, we explained 45% of the variation in denitrification potential (<em>p</em>-value<0.001). Our results suggest that (1) the composition of stream bacterial communities change in response to watershed urbanization and (2) such changes may have important consequences for critical ecosystem functions such as denitrification.</p> </div>", "links"=>[], "tags"=>["watershed", "urbanization", "alters", "bacterial", "communities"], "article_id"=>134278, "categories"=>["Inorganic Chemistry", "Ecology"], "users"=>["Si-Yi Wang", "Elizabeth B. Sudduth", "Matthew D. Wallenstein", "Justin P. Wright", "Emily S. Bernhardt"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0022972.s001", "https://dx.doi.org/10.1371/journal.pone.0022972.s002", "https://dx.doi.org/10.1371/journal.pone.0022972.s003", "https://dx.doi.org/10.1371/journal.pone.0022972.s004", "https://dx.doi.org/10.1371/journal.pone.0022972.s005", "https://dx.doi.org/10.1371/journal.pone.0022972.s006"], "stats"=>{"downloads"=>0, "page_views"=>7, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Watershed_Urbanization_Alters_the_Composition_and_Function_of_Stream_Bacterial_Communities/134278", "title"=>"Watershed Urbanization Alters the Composition and Function of Stream Bacterial Communities", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2011-08-12 01:11:18"}
  • {"files"=>["https://ndownloader.figshare.com/files/745823"], "description"=>"<p>The first mechanism (pathway A) focuses on the direct effect of urbanization on denitrification through changes to nitrate and organic carbon concentrations. The second mechanism (pathway B) focuses on the indirect effect of urbanization on denitrification through changes to denitrifier community composition.</p>", "links"=>[], "tags"=>["diagram", "describing", "causal", "mechanisms", "watershed", "urbanization", "denitrification", "rates"], "article_id"=>416188, "categories"=>["Inorganic Chemistry", "Ecology"], "users"=>["Si-Yi Wang", "Elizabeth B. Sudduth", "Matthew D. Wallenstein", "Justin P. Wright", "Emily S. Bernhardt"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0022972.g001", "stats"=>{"downloads"=>2, "page_views"=>65, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Conceptual_diagram_describing_two_causal_mechanisms_through_which_watershed_urbanization_might_alter_denitrification_rates_in_streams_/416188", "title"=>"Conceptual diagram describing two causal mechanisms through which watershed urbanization might alter denitrification rates in streams.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2011-08-12 01:43:08"}
  • {"files"=>["https://ndownloader.figshare.com/files/746097"], "description"=>"<p>Results from an ANOVA conducted to determine the significance of fixed effects on the final linear mixed-effects model (with interactions) of log-denitrification.</p>", "links"=>[], "tags"=>["anova", "conducted", "linear", "mixed-effects"], "article_id"=>416473, "categories"=>["Inorganic Chemistry", "Ecology"], "users"=>["Si-Yi Wang", "Elizabeth B. Sudduth", "Matthew D. Wallenstein", "Justin P. Wright", "Emily S. Bernhardt"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0022972.t003", "stats"=>{"downloads"=>1, "page_views"=>3, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Results_from_an_ANOVA_conducted_to_determine_the_significance_of_fixed_effects_on_the_final_linear_mixed_effects_model_with_interactions_of_log_denitrification_/416473", "title"=>"Results from an ANOVA conducted to determine the significance of fixed effects on the final linear mixed-effects model (with interactions) of log-denitrification.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2011-08-12 01:47:53"}
  • {"files"=>["https://ndownloader.figshare.com/files/746069"], "description"=>"<p>Note: While nosZ ordination axis 3 was not a significant term, its removal increased AIC (see <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0022972#pone.0022972.s005\" target=\"_blank\">Table S5</a>) and decreased pseudo-R<sup>2</sup>, so we kept the term in the final model.</p>", "links"=>[], "tags"=>["anova", "conducted", "linear", "mixed-effects"], "article_id"=>416444, "categories"=>["Inorganic Chemistry", "Ecology"], "users"=>["Si-Yi Wang", "Elizabeth B. Sudduth", "Matthew D. Wallenstein", "Justin P. Wright", "Emily S. Bernhardt"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0022972.t002", "stats"=>{"downloads"=>0, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Results_from_an_ANOVA_conducted_to_determine_the_significance_of_fixed_effects_on_the_final_linear_mixed_effects_model_without_interactions_of_log_denitrification_/416444", "title"=>"Results from an ANOVA conducted to determine the significance of fixed effects on the final linear mixed-effects model (without interactions) of log-denitrification.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2011-08-12 01:47:24"}
  • {"files"=>["https://ndownloader.figshare.com/files/745989"], "description"=>"<p>Linear regressions of NMS ordination axes scores against arcsine square root transformed percent impervious cover.</p>", "links"=>[], "tags"=>["regressions", "nms", "ordination", "axes", "scores", "arcsine", "transformed", "percent", "impervious"], "article_id"=>416356, "categories"=>["Inorganic Chemistry", "Ecology"], "users"=>["Si-Yi Wang", "Elizabeth B. Sudduth", "Matthew D. Wallenstein", "Justin P. Wright", "Emily S. Bernhardt"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0022972.g003", "stats"=>{"downloads"=>1, "page_views"=>24, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Linear_regressions_of_NMS_ordination_axes_scores_against_arcsine_square_root_transformed_percent_impervious_cover_/416356", "title"=>"Linear regressions of NMS ordination axes scores against arcsine square root transformed percent impervious cover.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2011-08-12 01:45:56"}
  • {"files"=>["https://ndownloader.figshare.com/files/746130"], "description"=>"<p>Notes:</p>1<p>Mean stream water concentrations recorded between June 2008 and July 2009.</p>2<p>Measure of cumulative heavy metal loading in July 2009 sediment samples.</p>3<p>Stream reach-averaged median sediment grain size based on surveys conducted in June 2007 and June 2009 <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0022972#pone.0022972-Sudduth1\" target=\"_blank\">[20]</a>, <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0022972#pone.0022972-Violin1\" target=\"_blank\">[21]</a>. Low values indicate dominance by smaller sand particles. High values indicate dominance by larger pebbles and granules.</p>4<p>Total degree-days calculated with daily minimum and maximum temperatures using the double triangle method <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0022972#pone.0022972-Roltsch1\" target=\"_blank\">[56]</a> and data taken between May 2007 and June 2007 <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0022972#pone.0022972-Sudduth1\" target=\"_blank\">[20]</a>.</p>5<p>Flashiness estimated from changes in hourly discharge between May and June 2007 <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0022972#pone.0022972-Sudduth1\" target=\"_blank\">[20]</a>.</p>6<p>Mean number of macroinvertebrate species belonging to <i>Ephemeroptera</i>, <i>Plecoptera</i>, and <i>Trichoptera</i> found in 2006 and 2007 surveys <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0022972#pone.0022972-Violin1\" target=\"_blank\">[21]</a>. EPT richness is often used as an indicator of water quality; EPT species tend to occur in clean, well oxygenated waters <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0022972#pone.0022972-Rosenberg1\" target=\"_blank\">[57]</a>.</p>", "links"=>[], "tags"=>["ranked", "percent", "impervious"], "article_id"=>416505, "categories"=>["Inorganic Chemistry", "Ecology"], "users"=>["Si-Yi Wang", "Elizabeth B. Sudduth", "Matthew D. Wallenstein", "Justin P. Wright", "Emily S. Bernhardt"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0022972.t001", "stats"=>{"downloads"=>0, "page_views"=>4, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Study_streams_ranked_in_order_of_percent_impervious_cover_in_the_watershed_/416505", "title"=>"Study streams, ranked in order of percent impervious cover in the watershed.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2011-08-12 01:48:25"}

PMC Usage Stats | Further Information

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Relative Metric

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