Document Detail

Ciliates and their picophytoplankton-feeding activity in a high-altitude warm-monomictic saline lake.
MedLine Citation:
PMID:  17931843     Owner:  NLM     Status:  MEDLINE    
The impact of feeding on autotrophic picoplankton (APP) on the ciliate composition of the assemblage was surveyed monthly along a depth gradient in the maar crater, athalassohaline, warm monomictic Lake Alchichica (Puebla, Mexico) from June 2003 to December 2005. Numbers of APP were evaluated from their autofluorescence. DAPI staining and the Fluorescently Labeled Bacteria technique were employed to count ciliates and estimate their feeding rates. A total of 38 taxa of ciliates have been identified using Quantitative Protargol Staining. Peritrichs followed by minute spirotrichs (particularly Halteria grandinella) often numerically dominated the ciliate assemblage and emerged as the most efficient APP feeders. A maximum of 54 ciliate cells ml(-1) was observed in the surface layer at the end of the mixing period, during the development of diatoms (Cyclotella alchichicana), the cyanobacterial bloom (Nodularia sp.) and its decay. Vorticellids (Pelagovorticella natans, Vorticella sp.) had the highest APP uptake (median 130 APP cil(-1) h(-1)). Mixotrophic Euplotes cf. daidaleos were important APP grazers near the oxycline. Scuticociliates (Cyclidium glaucoma, Uronema nigricans and an anaerobic cf. Isocyclidium globossum), were numerically dominant within the hypolimnetic assemblages and did not ingest APP. Generally, APP were not an important food source for the majority of the ciliate assemblage, being positively selected by a few species during the APP decay in aerobic and microaerobic conditions.
Dana Pestová; Miroslav Macek; María Elena Martínez Pérez
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-10-10
Journal Detail:
Title:  European journal of protistology     Volume:  44     ISSN:  0932-4739     ISO Abbreviation:  Eur. J. Protistol.     Publication Date:  2008 Feb 
Date Detail:
Created Date:  2008-03-03     Completed Date:  2008-05-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8917383     Medline TA:  Eur J Protistol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  13-25     Citation Subset:  IM    
Universidad Nacional Autónoma de México campus Iztacala, Av. de los Barrios 1, los Reyes Iztacala, Tlalnepantla, 54090 Edo. Mexico, Mexico.
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MeSH Terms
Behavior, Animal
Ciliophora / classification,  growth & development,  physiology*
Cyanobacteria / growth & development*
Feeding Behavior / physiology*
Fresh Water* / microbiology,  parasitology
Phytoplankton / growth & development*
Sodium Chloride*
Reg. No./Substance:
7647-14-5/Sodium Chloride

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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