Topic
Salpingoeca
About: Salpingoeca is a research topic. Over the lifetime, 16 publications have been published within this topic receiving 333 citations.
Papers
TL;DR: Neustonic choanoflagellates can be found in marine tide pools in the San Juan Islands, Washington, and on the Monterey Peninsula, California, and several marine photo-synthetic Chrysophyceae (in the Pedinellaceae), which also occur in these regions, have a basic structure so similar to choanorica that this family is placed in the Craspedomonadales.
Abstract: SYNOPSIS. Neustonic choanoflagellates can be found in marine tide pools in the San Juan Islands, Washington, and on the Monterey Peninsula, California. Several marine photo-synthetic Chrysophyceae (in the Pedinellaceae), which also occur in these regions, have a basic structure so similar to choanoflagellates that this family is placed in the Craspedomonadales. In pointing out this relationship, the derivation of the Craspedomonadales from pigmented Chrysophyceae is strongly indicated.
In addition to the naked choanoflagellates, which are placed in the Codonosigaceae, these organisms produce loricae of two different types: 1) loricae possibly of cellulose and without visible structure in the light microscope (Salpingoecaceae), 2) loricae composed of silica strands, sometimes forming a mesh with large open spaces (Acanthoecaceae). Members of the latter family seem to be confined to a marine environment and are a prominent part of this investigation. Examination of several species with the electron microscope has revealed interesting details of lorica morphology that are not visible with the light microscope.
Several new combinations of taxa are proposed in addition to new taxa, including 4 new species of Salpingoeca, 3 new species of Diploeca and 4 new species of Pleurasiga. Three new genera are described, Ellisiella gen. nov., Acanthoecopsis gen. nov., and Sportelloeca gen. nov.
94 citations
TL;DR: The external morphology of eight species of choanoflagellates representing seven genera has been investigated with the electron microscope and sections of two species show the presence of a very thin and delicate membrane which secures the protoplast to the lorica.
Abstract: The external morphology of eight species of choanoflagellates representing seven genera has been investigated with the electron microscope. Descriptions of three new species (Pleurasiga cupula, Diaphanoeca pedicellata and Stephanoeca pedicellata), a new variety (Pleurasiga minima var. minuta) and an emended description of Salpingoeca natans Gr⊘ntved are provided. All species possess a characteristic protoplast with a single anterior flagellum surrounded by a collar of tentacles and all possess a lorica composed of costae. In two species (Acanthoeca brevipoda Ellis and Diplotheca costata Valkanov) the costal strips forming the posterior chamber are broader than usual. Sections of two species show the presence of a very thin and delicate membrane which secures the protoplast to the lorica.
54 citations
27 citations
TL;DR: The data indicate that given a sufficient abundance of suitable host algae, which possibly provide a refuge from potential grazers, and efficient grazing of free- swimming HNF by zooplankton, this single choanoflagellate taxon can temporarily constitute the most important pelagic bacterivore in the reservoir.
Abstract: We studied the ecological role of choanoflagellates of the genus Salpingoeca (possibly S. amphoridium) attached to the colonial diatoms Asterionella formosa and Fragilaria crotonensis in the Rˇ imov reservoir (South Bohemia). The choanoflagellate was found only on these 2 species of diatoms (0 to 35 choanoflagellate cells per diatom colony). It is clearly identifiable in natural samples, and is a highly efficient planktonic bacterivore. In 2 field experiments (Expt 1 in June 2000 and Expt 2 in September 2002) we estimated in situ rates of bacterivory using fluorescently labeled bacteria (FLB) as tracers. There was a linear increase in the number of FLB per choanoflagellate during the first 30 min of incubation, with only 8 to 16% of individuals within the natural populations displaying no ingestion of FLB. Taxon-specific bacteria uptake rate of Salpingoeca spp. was 35 to 65 bacteria cell -1 h -1 . In Expt 2, by manipulating phosphorus (P) and organic carbon availability (glucose), we also examined how alga host and bacterial prey abundances can affect the dynamics of Salpingoeca and of other bacterivorous heterotrophic nanoflagellates (HNF). P additions increased the growth of F. crotonensis and subsequently also that of the attached Salpingoeca sp. In contrast, glucose addi- tion produced a marked development of small, free-swimming chrysomonads which competed with the choanoflagellate for the bacteria. Overall, across all experimental treatments Salpingoeca spp. grazing accounted for 11 to 64% of the total protistan grazing and for 6 to 49% of the daily removal rate of the bacterial standing stock. Our data indicate that given a sufficient abundance of suitable host algae, which possibly provide a refuge from potential grazers, and efficient grazing of free- swimming HNF by zooplankton, this single choanoflagellate taxon can temporarily constitute the most important pelagic bacterivore in the reservoir.
27 citations
15 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 1 |
| 2014 | 1 |
| 2013 | 1 |
| 2008 | 1 |
| 2007 | 2 |
| 2004 | 1 |