Food web dynamics in a temperate temporarily open/closed estuary (South Africa)
Size fractionated chlorophyll- a (chl- a), primary production and zooplankton (mesozooplankton (200–2000 μm) and microheterotrophs (5 μm) dominating total chl- a and production. During periods of reduced freshwater inflow into the estuary, total chl- a and production were dominated by small (
Gespeichert in:
| Veröffentlicht in: | Estuarine, coastal and shelf science coastal and shelf science, 2004, Vol.59 (1), p.87-95 |
|---|---|
| 1. Verfasser: | |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 95 |
|---|---|
| container_issue | 1 |
| container_start_page | 87 |
| container_title | Estuarine, coastal and shelf science |
| container_volume | 59 |
| creator | Froneman, P.W. |
| description | Size fractionated chlorophyll-
a (chl-
a), primary production and zooplankton (mesozooplankton (200–2000 μm) and microheterotrophs (5 μm) dominating total chl-
a and production. During periods of reduced freshwater inflow into the estuary, total chl-
a and production were dominated by small ( |
| doi_str_mv | 10.1016/j.ecss.2003.08.003 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_17712242</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0272771403002178</els_id><sourcerecordid>17712242</sourcerecordid><originalsourceid>FETCH-LOGICAL-c359t-e84db205160fbc893d8769491de74106e45b13f18cd07f81645380f6f5963753</originalsourceid><addsrcrecordid>eNp9UE1LAzEUDKJgrf4BT7koethtkk02WfAi4hcIPeg9pMkLpmw3Ndkq_femVvDmaR6PmfdmBqFzSmpKaDtb1mBzrhkhTU1UXeAATSjp2ooQKg7RhDDJKikpP0YnOS_LloqGTdD8IUaHv2CB3XYwq2AzDgM2eITVGpIZ4WeKyaTQb3FcwzCzfczgMORxY9IWX73GzfiOb30K1lyfoiNv-gxnvzhFbw_3b3dP1cv88fnu9qWyjejGChR3C0YEbYlfWNU1Tsm24x11IDklLXCxoI2nyjoivaItF40ivvWiaxspmim63J9dp_ixKVb0KmQLfW8GiJusaYnKGGeFyPZEm2LOCbxep7AqvjUleledXupddXpXnSZKFyiii9_rJlvT-2QGG_KfUnAlZccL72bPg5L0M0DS2QYYLLiQwI7axfDfm2-gy4My</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>17712242</pqid></control><display><type>article</type><title>Food web dynamics in a temperate temporarily open/closed estuary (South Africa)</title><source>Elsevier ScienceDirect Journals</source><creator>Froneman, P.W.</creator><creatorcontrib>Froneman, P.W.</creatorcontrib><description>Size fractionated chlorophyll-
a (chl-
a), primary production and zooplankton (mesozooplankton (200–2000 μm) and microheterotrophs (<200 μm)) grazing studies were conducted on nine occasions in the temperate, temporarily open/closed Kasouga estuary situated on the eastern seaboard of southern Africa over the period 2001–2002. Total chl-
a concentration and primary production during the study ranged between 0.20 and 3.43 mg chl-
a m
−3 and between 12.94 and 53.17 mg C m
−3 d
−1, respectively. The highest biomass and production values were consistently recorded following periods of freshwater inflow into the estuary. The inflow of freshwater into the estuary also coincided with a shift in the size structure of the phytoplankton community with large cells (>5 μm) dominating total chl-
a and production. During periods of reduced freshwater inflow into the estuary, total chl-
a and production were dominated by small (<5 μm) phytoplankton cells, which constituted up to 77% of biomass and up to 74% of total daily production. Daily grazing impact of the microheterotrophs ranged between 0.7 and 15.2 mg C m
−3 d
−1 or between 7.7 and 37.4% of the daily phytoplankton production. The mesozooplankton grazing impact ranged between 0.2 and 24.2 mg C m
−3 d
−1. These rates are equivalent to a loss of up to 46% (range 0.2–45.6%) of the daily phytoplankton production. Although there was clear evidence of temporal variability in the size structure of the phytoplankton community, there was no associated pattern in the partitioning of carbon between the mesozooplankton and microheterotrophs. The absence of any clear pattern appears to be related to the high degree of overlap in the preferred food particle size between the microheterotrophs and mesozooplankton.</description><identifier>ISSN: 0272-7714</identifier><identifier>EISSN: 1096-0015</identifier><identifier>DOI: 10.1016/j.ecss.2003.08.003</identifier><identifier>CODEN: ECSSD3</identifier><language>eng</language><publisher>London: Elsevier Ltd</publisher><subject>Animal and plant ecology ; Animal, plant and microbial ecology ; Biological and medical sciences ; Brackish ; Brackish water ecosystems ; ecological ratios ; estuary ; Fundamental and applied biological sciences. Psychology ; grazing ; Synecology ; zooplankton</subject><ispartof>Estuarine, coastal and shelf science, 2004, Vol.59 (1), p.87-95</ispartof><rights>2004 Elsevier Ltd</rights><rights>2004 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c359t-e84db205160fbc893d8769491de74106e45b13f18cd07f81645380f6f5963753</citedby><cites>FETCH-LOGICAL-c359t-e84db205160fbc893d8769491de74106e45b13f18cd07f81645380f6f5963753</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0272771403002178$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,4009,27902,27903,27904,65309</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=15487794$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Froneman, P.W.</creatorcontrib><title>Food web dynamics in a temperate temporarily open/closed estuary (South Africa)</title><title>Estuarine, coastal and shelf science</title><description>Size fractionated chlorophyll-
a (chl-
a), primary production and zooplankton (mesozooplankton (200–2000 μm) and microheterotrophs (<200 μm)) grazing studies were conducted on nine occasions in the temperate, temporarily open/closed Kasouga estuary situated on the eastern seaboard of southern Africa over the period 2001–2002. Total chl-
a concentration and primary production during the study ranged between 0.20 and 3.43 mg chl-
a m
−3 and between 12.94 and 53.17 mg C m
−3 d
−1, respectively. The highest biomass and production values were consistently recorded following periods of freshwater inflow into the estuary. The inflow of freshwater into the estuary also coincided with a shift in the size structure of the phytoplankton community with large cells (>5 μm) dominating total chl-
a and production. During periods of reduced freshwater inflow into the estuary, total chl-
a and production were dominated by small (<5 μm) phytoplankton cells, which constituted up to 77% of biomass and up to 74% of total daily production. Daily grazing impact of the microheterotrophs ranged between 0.7 and 15.2 mg C m
−3 d
−1 or between 7.7 and 37.4% of the daily phytoplankton production. The mesozooplankton grazing impact ranged between 0.2 and 24.2 mg C m
−3 d
−1. These rates are equivalent to a loss of up to 46% (range 0.2–45.6%) of the daily phytoplankton production. Although there was clear evidence of temporal variability in the size structure of the phytoplankton community, there was no associated pattern in the partitioning of carbon between the mesozooplankton and microheterotrophs. The absence of any clear pattern appears to be related to the high degree of overlap in the preferred food particle size between the microheterotrophs and mesozooplankton.</description><subject>Animal and plant ecology</subject><subject>Animal, plant and microbial ecology</subject><subject>Biological and medical sciences</subject><subject>Brackish</subject><subject>Brackish water ecosystems</subject><subject>ecological ratios</subject><subject>estuary</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>grazing</subject><subject>Synecology</subject><subject>zooplankton</subject><issn>0272-7714</issn><issn>1096-0015</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNp9UE1LAzEUDKJgrf4BT7koethtkk02WfAi4hcIPeg9pMkLpmw3Ndkq_femVvDmaR6PmfdmBqFzSmpKaDtb1mBzrhkhTU1UXeAATSjp2ooQKg7RhDDJKikpP0YnOS_LloqGTdD8IUaHv2CB3XYwq2AzDgM2eITVGpIZ4WeKyaTQb3FcwzCzfczgMORxY9IWX73GzfiOb30K1lyfoiNv-gxnvzhFbw_3b3dP1cv88fnu9qWyjejGChR3C0YEbYlfWNU1Tsm24x11IDklLXCxoI2nyjoivaItF40ivvWiaxspmim63J9dp_ixKVb0KmQLfW8GiJusaYnKGGeFyPZEm2LOCbxep7AqvjUleledXupddXpXnSZKFyiii9_rJlvT-2QGG_KfUnAlZccL72bPg5L0M0DS2QYYLLiQwI7axfDfm2-gy4My</recordid><startdate>2004</startdate><enddate>2004</enddate><creator>Froneman, P.W.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>7TN</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope></search><sort><creationdate>2004</creationdate><title>Food web dynamics in a temperate temporarily open/closed estuary (South Africa)</title><author>Froneman, P.W.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c359t-e84db205160fbc893d8769491de74106e45b13f18cd07f81645380f6f5963753</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Animal and plant ecology</topic><topic>Animal, plant and microbial ecology</topic><topic>Biological and medical sciences</topic><topic>Brackish</topic><topic>Brackish water ecosystems</topic><topic>ecological ratios</topic><topic>estuary</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>grazing</topic><topic>Synecology</topic><topic>zooplankton</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Froneman, P.W.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Aqualine</collection><collection>Oceanic Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Estuarine, coastal and shelf science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Froneman, P.W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Food web dynamics in a temperate temporarily open/closed estuary (South Africa)</atitle><jtitle>Estuarine, coastal and shelf science</jtitle><date>2004</date><risdate>2004</risdate><volume>59</volume><issue>1</issue><spage>87</spage><epage>95</epage><pages>87-95</pages><issn>0272-7714</issn><eissn>1096-0015</eissn><coden>ECSSD3</coden><abstract>Size fractionated chlorophyll-
a (chl-
a), primary production and zooplankton (mesozooplankton (200–2000 μm) and microheterotrophs (<200 μm)) grazing studies were conducted on nine occasions in the temperate, temporarily open/closed Kasouga estuary situated on the eastern seaboard of southern Africa over the period 2001–2002. Total chl-
a concentration and primary production during the study ranged between 0.20 and 3.43 mg chl-
a m
−3 and between 12.94 and 53.17 mg C m
−3 d
−1, respectively. The highest biomass and production values were consistently recorded following periods of freshwater inflow into the estuary. The inflow of freshwater into the estuary also coincided with a shift in the size structure of the phytoplankton community with large cells (>5 μm) dominating total chl-
a and production. During periods of reduced freshwater inflow into the estuary, total chl-
a and production were dominated by small (<5 μm) phytoplankton cells, which constituted up to 77% of biomass and up to 74% of total daily production. Daily grazing impact of the microheterotrophs ranged between 0.7 and 15.2 mg C m
−3 d
−1 or between 7.7 and 37.4% of the daily phytoplankton production. The mesozooplankton grazing impact ranged between 0.2 and 24.2 mg C m
−3 d
−1. These rates are equivalent to a loss of up to 46% (range 0.2–45.6%) of the daily phytoplankton production. Although there was clear evidence of temporal variability in the size structure of the phytoplankton community, there was no associated pattern in the partitioning of carbon between the mesozooplankton and microheterotrophs. The absence of any clear pattern appears to be related to the high degree of overlap in the preferred food particle size between the microheterotrophs and mesozooplankton.</abstract><cop>London</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.ecss.2003.08.003</doi><tpages>9</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0272-7714 |
| ispartof | Estuarine, coastal and shelf science, 2004, Vol.59 (1), p.87-95 |
| issn | 0272-7714 1096-0015 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_17712242 |
| source | Elsevier ScienceDirect Journals |
| subjects | Animal and plant ecology Animal, plant and microbial ecology Biological and medical sciences Brackish Brackish water ecosystems ecological ratios estuary Fundamental and applied biological sciences. Psychology grazing Synecology zooplankton |
| title | Food web dynamics in a temperate temporarily open/closed estuary (South Africa) |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-25T03%3A54%3A35IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Food%20web%20dynamics%20in%20a%20temperate%20temporarily%20open/closed%20estuary%20(South%20Africa)&rft.jtitle=Estuarine,%20coastal%20and%20shelf%20science&rft.au=Froneman,%20P.W.&rft.date=2004&rft.volume=59&rft.issue=1&rft.spage=87&rft.epage=95&rft.pages=87-95&rft.issn=0272-7714&rft.eissn=1096-0015&rft.coden=ECSSD3&rft_id=info:doi/10.1016/j.ecss.2003.08.003&rft_dat=%3Cproquest_cross%3E17712242%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=17712242&rft_id=info:pmid/&rft_els_id=S0272771403002178&rfr_iscdi=true |