Biofilm-specific uptake does not explain differences in whole-stream DOC tracer uptake between a forest and an agricultural stream

Content Partner: Lincoln University. Benthic biofilms are often assumed to control terrestrially-derived dissolved organic carbon (tDOC) uptake in streams. We tested this by comparing ¹³C-enriched ryegrass leachate uptake in an agricultural and a forest stream, hypothesizing that a greater abundance...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Graeber, D, Gücker, B, Wild, R, Wells, Naomi, Anlanger, C, Kamjunke, N, Norf, H, Schmidt, C, Brauns, M
Format: Artikel
Sprache:eng
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
container_end_page
container_issue
container_start_page
container_title
container_volume
creator Graeber, D
Gücker, B
Wild, R
Wells, Naomi
Anlanger, C
Kamjunke, N
Norf, H
Schmidt, C
Brauns, M
description Content Partner: Lincoln University. Benthic biofilms are often assumed to control terrestrially-derived dissolved organic carbon (tDOC) uptake in streams. We tested this by comparing ¹³C-enriched ryegrass leachate uptake in an agricultural and a forest stream, hypothesizing that a greater abundance of autotrophic biofilms in the agricultural stream would cause its whole-stream tDOC uptake to be comparatively low. We measured whole-stream and biofilm tDOC tracer uptake, metabolism, bacterial and algal diversity, and nutrient status of benthic epilithic biofilms, and assessed whole-stream hydromorphology. Whole-stream uptake of tDOC was six times lower in the agricultural (3.0 mg m¯² day¯¹) than in the forest (19.0 mg m¯² day¯¹) stream, and tDOC uptake velocity indicated lower tDOC demand in the agricultural (1.2 mm min¯¹) than in the forest (1.9 mm min¯¹) stream. The agricultural stream differed from the forest stream by slightly lower transient storage capacity and higher benthic biofilm bacterial abundance and production, lower biofilm biomass and lower biofilm molar C:N, C:P, and N:P ratios. Changes in epilithic biofilms contributed little to the differences in whole-stream tDOC tracer uptake between streams, as biofilm tDOC uptake only amounted to 4% and 13% of whole-stream uptake in the forest and agricultural stream, respectively. This comparison of a forest and an agricultural stream suggests that agricultural stressors have the potential to diminish both whole-stream tDOC uptake and uptake efficiency. Furthermore, the weak link between biofilm and whole-stream tDOC uptake implies that benthic biofilms characteristics are poor predictors for human impacts on tDOC uptake in agricultural streams and that hot spots of tDOC uptake are likely situated in the hyporheic zone or in the stream water column.
format Article
fullrecord <record><control><sourceid>nlnz_DQSLZ</sourceid><recordid>TN_cdi_nlnz_digitalnz_v2_56060176</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>56060176</sourcerecordid><originalsourceid>FETCH-nlnz_digitalnz_v2_560601763</originalsourceid><addsrcrecordid>eNqNizsOwjAQRNNQIOAOywEiBRChJ4DoaOijxV4nKxw7sjcEUXJygoCeYjQfzRsnzy17w7ZJY0uKDSvoWsErgfYUwXkBurcW2YFmYyiQU8M-1L72ltIogbCB3akACago_PALSU_kAMH4QFEAnR4EWAVWnZUuoIUPPU1GBm2k2dcnyfywPxfH1Fn3KDVXLPhOt2W5zrM8W2zy1T-fF9rFSt4</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Biofilm-specific uptake does not explain differences in whole-stream DOC tracer uptake between a forest and an agricultural stream</title><source>DigitalNZ</source><creator>Graeber, D ; Gücker, B ; Wild, R ; Wells, Naomi ; Anlanger, C ; Kamjunke, N ; Norf, H ; Schmidt, C ; Brauns, M</creator><creatorcontrib>Graeber, D ; Gücker, B ; Wild, R ; Wells, Naomi ; Anlanger, C ; Kamjunke, N ; Norf, H ; Schmidt, C ; Brauns, M</creatorcontrib><description>Content Partner: Lincoln University. Benthic biofilms are often assumed to control terrestrially-derived dissolved organic carbon (tDOC) uptake in streams. We tested this by comparing ¹³C-enriched ryegrass leachate uptake in an agricultural and a forest stream, hypothesizing that a greater abundance of autotrophic biofilms in the agricultural stream would cause its whole-stream tDOC uptake to be comparatively low. We measured whole-stream and biofilm tDOC tracer uptake, metabolism, bacterial and algal diversity, and nutrient status of benthic epilithic biofilms, and assessed whole-stream hydromorphology. Whole-stream uptake of tDOC was six times lower in the agricultural (3.0 mg m¯² day¯¹) than in the forest (19.0 mg m¯² day¯¹) stream, and tDOC uptake velocity indicated lower tDOC demand in the agricultural (1.2 mm min¯¹) than in the forest (1.9 mm min¯¹) stream. The agricultural stream differed from the forest stream by slightly lower transient storage capacity and higher benthic biofilm bacterial abundance and production, lower biofilm biomass and lower biofilm molar C:N, C:P, and N:P ratios. Changes in epilithic biofilms contributed little to the differences in whole-stream tDOC tracer uptake between streams, as biofilm tDOC uptake only amounted to 4% and 13% of whole-stream uptake in the forest and agricultural stream, respectively. This comparison of a forest and an agricultural stream suggests that agricultural stressors have the potential to diminish both whole-stream tDOC uptake and uptake efficiency. Furthermore, the weak link between biofilm and whole-stream tDOC uptake implies that benthic biofilms characteristics are poor predictors for human impacts on tDOC uptake in agricultural streams and that hot spots of tDOC uptake are likely situated in the hyporheic zone or in the stream water column.</description><language>eng</language><publisher>Springer</publisher><creationdate>2019-06</creationdate><rights>Some rights reserved</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>780,25594</link.rule.ids><linktorsrc>$$Uhttp://api.digitalnz.org/records/56060176/source$$EView_record_in_DigitalNZ$$FView_record_in_$$GDigitalNZ$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Graeber, D</creatorcontrib><creatorcontrib>Gücker, B</creatorcontrib><creatorcontrib>Wild, R</creatorcontrib><creatorcontrib>Wells, Naomi</creatorcontrib><creatorcontrib>Anlanger, C</creatorcontrib><creatorcontrib>Kamjunke, N</creatorcontrib><creatorcontrib>Norf, H</creatorcontrib><creatorcontrib>Schmidt, C</creatorcontrib><creatorcontrib>Brauns, M</creatorcontrib><title>Biofilm-specific uptake does not explain differences in whole-stream DOC tracer uptake between a forest and an agricultural stream</title><description>Content Partner: Lincoln University. Benthic biofilms are often assumed to control terrestrially-derived dissolved organic carbon (tDOC) uptake in streams. We tested this by comparing ¹³C-enriched ryegrass leachate uptake in an agricultural and a forest stream, hypothesizing that a greater abundance of autotrophic biofilms in the agricultural stream would cause its whole-stream tDOC uptake to be comparatively low. We measured whole-stream and biofilm tDOC tracer uptake, metabolism, bacterial and algal diversity, and nutrient status of benthic epilithic biofilms, and assessed whole-stream hydromorphology. Whole-stream uptake of tDOC was six times lower in the agricultural (3.0 mg m¯² day¯¹) than in the forest (19.0 mg m¯² day¯¹) stream, and tDOC uptake velocity indicated lower tDOC demand in the agricultural (1.2 mm min¯¹) than in the forest (1.9 mm min¯¹) stream. The agricultural stream differed from the forest stream by slightly lower transient storage capacity and higher benthic biofilm bacterial abundance and production, lower biofilm biomass and lower biofilm molar C:N, C:P, and N:P ratios. Changes in epilithic biofilms contributed little to the differences in whole-stream tDOC tracer uptake between streams, as biofilm tDOC uptake only amounted to 4% and 13% of whole-stream uptake in the forest and agricultural stream, respectively. This comparison of a forest and an agricultural stream suggests that agricultural stressors have the potential to diminish both whole-stream tDOC uptake and uptake efficiency. Furthermore, the weak link between biofilm and whole-stream tDOC uptake implies that benthic biofilms characteristics are poor predictors for human impacts on tDOC uptake in agricultural streams and that hot spots of tDOC uptake are likely situated in the hyporheic zone or in the stream water column.</description><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>DQSLZ</sourceid><recordid>eNqNizsOwjAQRNNQIOAOywEiBRChJ4DoaOijxV4nKxw7sjcEUXJygoCeYjQfzRsnzy17w7ZJY0uKDSvoWsErgfYUwXkBurcW2YFmYyiQU8M-1L72ltIogbCB3akACago_PALSU_kAMH4QFEAnR4EWAVWnZUuoIUPPU1GBm2k2dcnyfywPxfH1Fn3KDVXLPhOt2W5zrM8W2zy1T-fF9rFSt4</recordid><startdate>20190615</startdate><enddate>20190615</enddate><creator>Graeber, D</creator><creator>Gücker, B</creator><creator>Wild, R</creator><creator>Wells, Naomi</creator><creator>Anlanger, C</creator><creator>Kamjunke, N</creator><creator>Norf, H</creator><creator>Schmidt, C</creator><creator>Brauns, M</creator><general>Springer</general><scope>DQSLZ</scope><scope>HAZOD</scope></search><sort><creationdate>20190615</creationdate><title>Biofilm-specific uptake does not explain differences in whole-stream DOC tracer uptake between a forest and an agricultural stream</title><author>Graeber, D ; Gücker, B ; Wild, R ; Wells, Naomi ; Anlanger, C ; Kamjunke, N ; Norf, H ; Schmidt, C ; Brauns, M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-nlnz_digitalnz_v2_560601763</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><toplevel>online_resources</toplevel><creatorcontrib>Graeber, D</creatorcontrib><creatorcontrib>Gücker, B</creatorcontrib><creatorcontrib>Wild, R</creatorcontrib><creatorcontrib>Wells, Naomi</creatorcontrib><creatorcontrib>Anlanger, C</creatorcontrib><creatorcontrib>Kamjunke, N</creatorcontrib><creatorcontrib>Norf, H</creatorcontrib><creatorcontrib>Schmidt, C</creatorcontrib><creatorcontrib>Brauns, M</creatorcontrib><collection>DigitalNZ</collection><collection>DigitalNZ</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Graeber, D</au><au>Gücker, B</au><au>Wild, R</au><au>Wells, Naomi</au><au>Anlanger, C</au><au>Kamjunke, N</au><au>Norf, H</au><au>Schmidt, C</au><au>Brauns, M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Biofilm-specific uptake does not explain differences in whole-stream DOC tracer uptake between a forest and an agricultural stream</atitle><date>2019-06-15</date><risdate>2019</risdate><abstract>Content Partner: Lincoln University. Benthic biofilms are often assumed to control terrestrially-derived dissolved organic carbon (tDOC) uptake in streams. We tested this by comparing ¹³C-enriched ryegrass leachate uptake in an agricultural and a forest stream, hypothesizing that a greater abundance of autotrophic biofilms in the agricultural stream would cause its whole-stream tDOC uptake to be comparatively low. We measured whole-stream and biofilm tDOC tracer uptake, metabolism, bacterial and algal diversity, and nutrient status of benthic epilithic biofilms, and assessed whole-stream hydromorphology. Whole-stream uptake of tDOC was six times lower in the agricultural (3.0 mg m¯² day¯¹) than in the forest (19.0 mg m¯² day¯¹) stream, and tDOC uptake velocity indicated lower tDOC demand in the agricultural (1.2 mm min¯¹) than in the forest (1.9 mm min¯¹) stream. The agricultural stream differed from the forest stream by slightly lower transient storage capacity and higher benthic biofilm bacterial abundance and production, lower biofilm biomass and lower biofilm molar C:N, C:P, and N:P ratios. Changes in epilithic biofilms contributed little to the differences in whole-stream tDOC tracer uptake between streams, as biofilm tDOC uptake only amounted to 4% and 13% of whole-stream uptake in the forest and agricultural stream, respectively. This comparison of a forest and an agricultural stream suggests that agricultural stressors have the potential to diminish both whole-stream tDOC uptake and uptake efficiency. Furthermore, the weak link between biofilm and whole-stream tDOC uptake implies that benthic biofilms characteristics are poor predictors for human impacts on tDOC uptake in agricultural streams and that hot spots of tDOC uptake are likely situated in the hyporheic zone or in the stream water column.</abstract><pub>Springer</pub><oa>free_for_read</oa></addata></record>
fulltext fulltext_linktorsrc
identifier
ispartof
issn
language eng
recordid cdi_nlnz_digitalnz_v2_56060176
source DigitalNZ
title Biofilm-specific uptake does not explain differences in whole-stream DOC tracer uptake between a forest and an agricultural stream
url https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T17%3A41%3A13IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-nlnz_DQSLZ&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Biofilm-specific%20uptake%20does%20not%20explain%20differences%20in%20whole-stream%20DOC%20tracer%20uptake%20between%20a%20forest%20and%20an%20agricultural%20stream&rft.au=Graeber,%20D&rft.date=2019-06-15&rft_id=info:doi/&rft_dat=%3Cnlnz_DQSLZ%3E56060176%3C/nlnz_DQSLZ%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true