Grazing on Pfiesteria piscicida by microzooplankton
The potential grazing pressure of natural assemblages of microzooplankton (
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| Veröffentlicht in: | Aquatic microbial ecology : international journal 2000-10, Vol.22 (3), p.261-270 |
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| container_title | Aquatic microbial ecology : international journal |
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| creator | Stoecker, DK Stevens, K Gustafson, DE |
| description | The potential grazing pressure of natural assemblages of microzooplankton ( |
| doi_str_mv | 10.3354/ame022261 |
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NTZ of P. piscicida (strain FDEPMDR23, an apparently non-toxic strain) were stained with a vital green fluorescent dye, 5-chloromethylfluorescein diacetate, and added to treatments with (<200 mu m) and without (<1.2 mu m) the natural microzooplankton assemblage. The dominant micrograzers on P. piscicida NTZ were large tintinnids and oligotrichous ciliates. Grazing mortality depended on species composition as well as abundance of microzooplankton. The instantaneous rate of grazing mortality varied from 0 to 10.2 d super(-1) and was >2 d super(-1) in 6 out of 10 experiments. In previous studies, the maximum instantaneous rate of growth of NTZ was <2 d super(-1); thus, microzooplankton grazing has the potential to prevent net growth of NTZ. However, in 1 out of 2 experiments in which grazing on different strains of P. piscicida were compared, grazing was inhibited with a recently toxic strain (271A-1) of P. piscicida. Intervals of low grazing pressure may present windows of opportunity for growth of P. piscicida NTZ, which, in some cases, can become toxic in the presence of fish.</description><identifier>ISSN: 0948-3055</identifier><identifier>EISSN: 1616-1564</identifier><identifier>DOI: 10.3354/ame022261</identifier><language>eng</language><subject>bays ; Ciliophora ; Oligotricha ; Pfiesteria piscicida ; Tintinnidae ; USA, Maryland ; USA, Maryland, Chesapeake Bay</subject><ispartof>Aquatic microbial ecology : international journal, 2000-10, Vol.22 (3), p.261-270</ispartof><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c293t-e53a7cca3ba8814f01cfbd67c09a49b67079f0f2275e4bba28d78d3d52872553</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,3746,27901,27902</link.rule.ids></links><search><creatorcontrib>Stoecker, DK</creatorcontrib><creatorcontrib>Stevens, K</creatorcontrib><creatorcontrib>Gustafson, DE</creatorcontrib><title>Grazing on Pfiesteria piscicida by microzooplankton</title><title>Aquatic microbial ecology : international journal</title><description>The potential grazing pressure of natural assemblages of microzooplankton (<200 mu m size fraction) on cultured non-toxic zoospores (NTZ) of Pfiesteria piscicida (Dinamoebiales, Dinophyceae, Pyrrhophyta) was measured approximately weekly during the summer of 1999 using surface water samples from a tidal tributary of the Chesapeake Bay (Chicamacomico River, MD, USA) in which fish kills associated with Pfiesteria-like dinoflagellates have occurred. NTZ of P. piscicida (strain FDEPMDR23, an apparently non-toxic strain) were stained with a vital green fluorescent dye, 5-chloromethylfluorescein diacetate, and added to treatments with (<200 mu m) and without (<1.2 mu m) the natural microzooplankton assemblage. The dominant micrograzers on P. piscicida NTZ were large tintinnids and oligotrichous ciliates. Grazing mortality depended on species composition as well as abundance of microzooplankton. The instantaneous rate of grazing mortality varied from 0 to 10.2 d super(-1) and was >2 d super(-1) in 6 out of 10 experiments. In previous studies, the maximum instantaneous rate of growth of NTZ was <2 d super(-1); thus, microzooplankton grazing has the potential to prevent net growth of NTZ. However, in 1 out of 2 experiments in which grazing on different strains of P. piscicida were compared, grazing was inhibited with a recently toxic strain (271A-1) of P. piscicida. Intervals of low grazing pressure may present windows of opportunity for growth of P. piscicida NTZ, which, in some cases, can become toxic in the presence of fish.</description><subject>bays</subject><subject>Ciliophora</subject><subject>Oligotricha</subject><subject>Pfiesteria piscicida</subject><subject>Tintinnidae</subject><subject>USA, Maryland</subject><subject>USA, Maryland, Chesapeake Bay</subject><issn>0948-3055</issn><issn>1616-1564</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><recordid>eNo9kE9LwzAchoMoOKcHv0FPgofqL_-TowydwkAPu4c0TSTaNjXpDtunt2Pi6b08vDw8CN1ieKCUs0fbeyCECHyGFlhgUWMu2DlagGaqpsD5Jboq5QsAFCewQHSd7SEOn1Uaqo8QfZl8jrYaY3HRxdZWzb7qo8vpkNLY2eF7SsM1ugi2K_7mb5do-_K8Xb3Wm_f12-ppUzui6VR7Tq10ztLGKoVZAOxC0wrpQFumGyFB6gCBEMk9axpLVCtVS1tOlCSc0yW6O92OOf3sZjPTz1a-my182hWDpWSaCZjB-xM4a5aSfTBjjr3Ne4PBHKuY_yr0F_K3VLQ</recordid><startdate>20001026</startdate><enddate>20001026</enddate><creator>Stoecker, DK</creator><creator>Stevens, K</creator><creator>Gustafson, DE</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>7TN</scope><scope>C1K</scope><scope>F1W</scope><scope>H95</scope><scope>H97</scope><scope>L.G</scope><scope>M7N</scope></search><sort><creationdate>20001026</creationdate><title>Grazing on Pfiesteria piscicida by microzooplankton</title><author>Stoecker, DK ; Stevens, K ; Gustafson, DE</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c293t-e53a7cca3ba8814f01cfbd67c09a49b67079f0f2275e4bba28d78d3d52872553</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2000</creationdate><topic>bays</topic><topic>Ciliophora</topic><topic>Oligotricha</topic><topic>Pfiesteria piscicida</topic><topic>Tintinnidae</topic><topic>USA, Maryland</topic><topic>USA, Maryland, Chesapeake Bay</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Stoecker, DK</creatorcontrib><creatorcontrib>Stevens, K</creatorcontrib><creatorcontrib>Gustafson, DE</creatorcontrib><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Oceanic 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) 3: Aquatic Pollution & Environmental Quality</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><jtitle>Aquatic microbial ecology : international journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Stoecker, DK</au><au>Stevens, K</au><au>Gustafson, DE</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Grazing on Pfiesteria piscicida by microzooplankton</atitle><jtitle>Aquatic microbial ecology : international journal</jtitle><date>2000-10-26</date><risdate>2000</risdate><volume>22</volume><issue>3</issue><spage>261</spage><epage>270</epage><pages>261-270</pages><issn>0948-3055</issn><eissn>1616-1564</eissn><abstract>The potential grazing pressure of natural assemblages of microzooplankton (<200 mu m size fraction) on cultured non-toxic zoospores (NTZ) of Pfiesteria piscicida (Dinamoebiales, Dinophyceae, Pyrrhophyta) was measured approximately weekly during the summer of 1999 using surface water samples from a tidal tributary of the Chesapeake Bay (Chicamacomico River, MD, USA) in which fish kills associated with Pfiesteria-like dinoflagellates have occurred. NTZ of P. piscicida (strain FDEPMDR23, an apparently non-toxic strain) were stained with a vital green fluorescent dye, 5-chloromethylfluorescein diacetate, and added to treatments with (<200 mu m) and without (<1.2 mu m) the natural microzooplankton assemblage. The dominant micrograzers on P. piscicida NTZ were large tintinnids and oligotrichous ciliates. Grazing mortality depended on species composition as well as abundance of microzooplankton. The instantaneous rate of grazing mortality varied from 0 to 10.2 d super(-1) and was >2 d super(-1) in 6 out of 10 experiments. In previous studies, the maximum instantaneous rate of growth of NTZ was <2 d super(-1); thus, microzooplankton grazing has the potential to prevent net growth of NTZ. However, in 1 out of 2 experiments in which grazing on different strains of P. piscicida were compared, grazing was inhibited with a recently toxic strain (271A-1) of P. piscicida. Intervals of low grazing pressure may present windows of opportunity for growth of P. piscicida NTZ, which, in some cases, can become toxic in the presence of fish.</abstract><doi>10.3354/ame022261</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 0948-3055 |
| ispartof | Aquatic microbial ecology : international journal, 2000-10, Vol.22 (3), p.261-270 |
| issn | 0948-3055 1616-1564 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_17749460 |
| source | Inter-Research; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection |
| subjects | bays Ciliophora Oligotricha Pfiesteria piscicida Tintinnidae USA, Maryland USA, Maryland, Chesapeake Bay |
| title | Grazing on Pfiesteria piscicida by microzooplankton |
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