Further processing options
online resource

Fish-mediated nutrient cycling and benthic microbial processes: can consumers influence stream nutrient cycling at multiple spatial scales?

Bibliographic Details
Journal Title: Freshwater Science
Authors and Corporations: Taylor, Jason M., Back, Jeffrey A., Valenti, Theodore W., King, Ryan S.
In: Freshwater Science, 31, 2012, 3, p. 928-944
Type of Resource: E-Article
Language: English
published:
The University of Chicago Press
finc.format ElectronicArticle
finc.mega_collection sid-55-col-jstorlife
JSTOR Life Sciences Archive
finc.id ai-55-aHR0cHM6Ly93d3cuanN0b3Iub3JnL3N0YWJsZS8xMC4xODk5LzExLTExMy4x
finc.record_id 10.1899/11-113.1
finc.source_id 55
ris.type EJOUR
rft.atitle Fish-mediated nutrient cycling and benthic microbial processes: can consumers influence stream nutrient cycling at multiple spatial scales?
rft.epage 944
rft.genre article
rft.issn 2161-9549
2161-9565
rft.issue 3
rft.jtitle Freshwater Science
rft.tpages 16
rft.pages 928-944
rft.pub The University of Chicago Press
rft.date 2012-07-17
x.date 2012-07-17T00:00:00Z
rft.spage 928
rft.volume 31
abstract <title>Abstract</title> <p>Fish-mediated nutrient recycling influences nutrient dynamics in stream ecosystems, but its consequences for smaller-scale microbial processes in benthic habitats are not well understood. We quantified the effect of nutrient recycling by the grazing fish,<italic>Campostoma anomalum</italic>, on downstream periphyton in 12 flow-through stream mesocosms. We compared periphyton nutrient ratios and algal biomass (as chlorophyll<italic>a</italic>[chl<italic>a</italic>]) between tiles upstream and downstream of enclosures with and without fish to measure nutrient-cycling effects in streams with low (11) and high (177) surface-water dissolved N∶P molar ratios. No upstream–downstream changes in periphyton nutrient ratios were observed in low N∶P streams with or without fish. In high N∶P streams, periphyton C∶N decreased and C∶P and N∶P increased on tiles downstream of enclosures. In high N∶P streams, downstream changes in periphyton nutrient ratios were greater in streams with than without fish, and chl<italic>a</italic>significantly increased downstream of enclosures with fish. We linked nutrient-recycling effects to downstream microbial processes by comparing bacterial biomass production (BBP), photosynthesis (PS) rates, and the degree of coupling between the 2 processes on tiles downstream of enclosures. We estimated the degree of coupled production between algae and bacteria downstream of enclosures as the covariance between PS and BBP among replicates within each stream (COV<sub>PS–BBP</sub>). In high N∶P streams, areal BBP and PS rates and COV<sub>PS–BBP</sub>were higher downstream of enclosures with fish. Chl<italic>a</italic>and COV<sub>PS–BBP</sub>declined with increasing periphyton C∶N content, resulting in a positive relationship between COV<sub>PS–BBP</sub>and algal biomass across all treatments. Our results indicate that grazing fish alter stream ecosystem N and P dynamics through consumer-mediated recycling pathways, but downstream responses depend on background nutrient regimes. Fish-mediated changes in nutrient dynamics and algal biomass influence reliance of heterotrophs and autotrophs on nutrients recycled within periphyton communities to support benthic production.</p>
authors Array ( [rft.aulast] => Taylor [rft.aufirst] => Jason M. )
Array ( [rft.aulast] => Back [rft.aufirst] => Jeffrey A. )
Array ( [rft.aulast] => Valenti [rft.aufirst] => Theodore W. )
Array ( [rft.aulast] => King [rft.aufirst] => Ryan S. )
doi 10.1899/11-113.1
languages eng
url https://www.jstor.org/stable/10.1899/11-113.1
version 0.9
x.headings Articles
openURL url_ver=Z39.88-2004&ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fvufind.svn.sourceforge.net%3Agenerator&rft.title=Fish-mediated+nutrient+cycling+and+benthic+microbial+processes%3A+can+consumers+influence+stream+nutrient+cycling+at+multiple+spatial+scales%3F&rft.date=2012-07-17&genre=article&rft_id=info%3Adoi%2F10.1899%2F11-113.1&issn=2161-9565&volume=31&issue=3&spage=928&epage=944&pages=928-944&jtitle=Freshwater+Science&atitle=Fish-mediated+nutrient+cycling+and+benthic+microbial+processes%3A+can+consumers+influence+stream+nutrient+cycling+at+multiple+spatial+scales%3F&aulast=King&aufirst=Ryan+S.&rft.language%5B0%5D=eng
SOLR
_version_ 1748601667740237838
access_facet Electronic Resources
author Taylor, Jason M., Back, Jeffrey A., Valenti, Theodore W., King, Ryan S.
author_facet Taylor, Jason M., Back, Jeffrey A., Valenti, Theodore W., King, Ryan S., Taylor, Jason M., Back, Jeffrey A., Valenti, Theodore W., King, Ryan S.
author_sort taylor, jason m.
branch_nrw Electronic Resources
collection sid-55-col-jstorlife
container_issue 3
container_start_page 928
container_title Freshwater Science
container_volume 31
description <title>Abstract</title> <p>Fish-mediated nutrient recycling influences nutrient dynamics in stream ecosystems, but its consequences for smaller-scale microbial processes in benthic habitats are not well understood. We quantified the effect of nutrient recycling by the grazing fish,<italic>Campostoma anomalum</italic>, on downstream periphyton in 12 flow-through stream mesocosms. We compared periphyton nutrient ratios and algal biomass (as chlorophyll<italic>a</italic>[chl<italic>a</italic>]) between tiles upstream and downstream of enclosures with and without fish to measure nutrient-cycling effects in streams with low (11) and high (177) surface-water dissolved N∶P molar ratios. No upstream–downstream changes in periphyton nutrient ratios were observed in low N∶P streams with or without fish. In high N∶P streams, periphyton C∶N decreased and C∶P and N∶P increased on tiles downstream of enclosures. In high N∶P streams, downstream changes in periphyton nutrient ratios were greater in streams with than without fish, and chl<italic>a</italic>significantly increased downstream of enclosures with fish. We linked nutrient-recycling effects to downstream microbial processes by comparing bacterial biomass production (BBP), photosynthesis (PS) rates, and the degree of coupling between the 2 processes on tiles downstream of enclosures. We estimated the degree of coupled production between algae and bacteria downstream of enclosures as the covariance between PS and BBP among replicates within each stream (COV<sub>PS–BBP</sub>). In high N∶P streams, areal BBP and PS rates and COV<sub>PS–BBP</sub>were higher downstream of enclosures with fish. Chl<italic>a</italic>and COV<sub>PS–BBP</sub>declined with increasing periphyton C∶N content, resulting in a positive relationship between COV<sub>PS–BBP</sub>and algal biomass across all treatments. Our results indicate that grazing fish alter stream ecosystem N and P dynamics through consumer-mediated recycling pathways, but downstream responses depend on background nutrient regimes. Fish-mediated changes in nutrient dynamics and algal biomass influence reliance of heterotrophs and autotrophs on nutrients recycled within periphyton communities to support benthic production.</p>
doi_str_mv 10.1899/11-113.1
facet_avail Online
format ElectronicArticle
format_de105 Article, E-Article
format_de14 Article, E-Article
format_de15 Article, E-Article
format_de520 Article, E-Article
format_de540 Article, E-Article
format_dech1 Article, E-Article
format_ded117 Article, E-Article
format_degla1 E-Article
format_del152 Buch
format_del189 Article, E-Article
format_dezi4 Article
format_dezwi2 Article, E-Article
format_finc Article, E-Article
format_nrw Article, E-Article
geogr_code not assigned
geogr_code_person not assigned
id ai-55-aHR0cHM6Ly93d3cuanN0b3Iub3JnL3N0YWJsZS8xMC4xODk5LzExLTExMy4x
imprint The University of Chicago Press, 2012
imprint_str_mv The University of Chicago Press, 2012
institution DE-14, DE-D13
issn 2161-9549, 2161-9565
issn_str_mv 2161-9549, 2161-9565
language English
last_indexed 2022-11-04T21:14:59.951Z
match_str taylor:2012:fishmediatednutrientcyclingandbenthicmicrobialprocessescanconsumersinfluencestreamnutrientcyclingatmultiplespatialscales:
mega_collection JSTOR Life Sciences Archive
physical 928-944
publishDate 2012
publishDateSort 2012
publisher The University of Chicago Press
record_id 10.1899/11-113.1
recordtype ai
score 18,68584
series Freshwater Science
source_id 55
spelling Taylor, Jason M. Back, Jeffrey A. Valenti, Theodore W. King, Ryan S. 2161-9549 2161-9565 The University of Chicago Press https://www.jstor.org/stable/10.1899/11-113.1 <title>Abstract</title> <p>Fish-mediated nutrient recycling influences nutrient dynamics in stream ecosystems, but its consequences for smaller-scale microbial processes in benthic habitats are not well understood. We quantified the effect of nutrient recycling by the grazing fish,<italic>Campostoma anomalum</italic>, on downstream periphyton in 12 flow-through stream mesocosms. We compared periphyton nutrient ratios and algal biomass (as chlorophyll<italic>a</italic>[chl<italic>a</italic>]) between tiles upstream and downstream of enclosures with and without fish to measure nutrient-cycling effects in streams with low (11) and high (177) surface-water dissolved N∶P molar ratios. No upstream–downstream changes in periphyton nutrient ratios were observed in low N∶P streams with or without fish. In high N∶P streams, periphyton C∶N decreased and C∶P and N∶P increased on tiles downstream of enclosures. In high N∶P streams, downstream changes in periphyton nutrient ratios were greater in streams with than without fish, and chl<italic>a</italic>significantly increased downstream of enclosures with fish. We linked nutrient-recycling effects to downstream microbial processes by comparing bacterial biomass production (BBP), photosynthesis (PS) rates, and the degree of coupling between the 2 processes on tiles downstream of enclosures. We estimated the degree of coupled production between algae and bacteria downstream of enclosures as the covariance between PS and BBP among replicates within each stream (COV<sub>PS–BBP</sub>). In high N∶P streams, areal BBP and PS rates and COV<sub>PS–BBP</sub>were higher downstream of enclosures with fish. Chl<italic>a</italic>and COV<sub>PS–BBP</sub>declined with increasing periphyton C∶N content, resulting in a positive relationship between COV<sub>PS–BBP</sub>and algal biomass across all treatments. Our results indicate that grazing fish alter stream ecosystem N and P dynamics through consumer-mediated recycling pathways, but downstream responses depend on background nutrient regimes. Fish-mediated changes in nutrient dynamics and algal biomass influence reliance of heterotrophs and autotrophs on nutrients recycled within periphyton communities to support benthic production.</p> Fish-mediated nutrient cycling and benthic microbial processes: can consumers influence stream nutrient cycling at multiple spatial scales? Freshwater Science
spellingShingle Taylor, Jason M., Back, Jeffrey A., Valenti, Theodore W., King, Ryan S., Freshwater Science, Fish-mediated nutrient cycling and benthic microbial processes: can consumers influence stream nutrient cycling at multiple spatial scales?
title Fish-mediated nutrient cycling and benthic microbial processes: can consumers influence stream nutrient cycling at multiple spatial scales?
title_full Fish-mediated nutrient cycling and benthic microbial processes: can consumers influence stream nutrient cycling at multiple spatial scales?
title_fullStr Fish-mediated nutrient cycling and benthic microbial processes: can consumers influence stream nutrient cycling at multiple spatial scales?
title_full_unstemmed Fish-mediated nutrient cycling and benthic microbial processes: can consumers influence stream nutrient cycling at multiple spatial scales?
title_short Fish-mediated nutrient cycling and benthic microbial processes: can consumers influence stream nutrient cycling at multiple spatial scales?
title_sort fish-mediated nutrient cycling and benthic microbial processes: can consumers influence stream nutrient cycling at multiple spatial scales?
url https://www.jstor.org/stable/10.1899/11-113.1, https://doi.org/10.1899/11-113.1