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  • 1
    Electronic Resource
    Electronic Resource
    Taxonomic Descriptions of One New Species and Redescription of Four Species in the Family Strombidiidae (Ciliophora, Oligotrichida) (1988)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 35 (1988), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Five ciliate species collected from the Woods Hole area were examined by protargol silver impregnation and scanning electron microscopy. These ciliates have been shown to sequester and use chloroplasts obtained from flagellate prey. One new species, Strombidium chlorophilum, is described. Four other species, Strombidium capitatum (Leegaard, 1915) Kahl, 1932, Strombidium conicum (Lohmann, 1908) Wulff, 1919, Strombidium acutum (Leegaard, 1915) Kahl, 1932, and Laboea strobila Lohmann, 1908, are redescribed. Characters used in describing the Strombidiidae include cell size and shape, anterior and ventral polykinetids, macronuclear shape and size, the kinetid “girdle,” the ventral kinety, the trichites, and the paroral kinety. The rationale for using these characters as taxonomic criteria is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1988.tb04322.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The annual cycle of heterotrophic planktonic ciliates in the waters surrounding the Isles of Shoals, Gulf of Maine: an assessment of their trophic role (1988)
    Springer
    Marine biology 99 (1988), S. 21-30 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ciliates in the waters surrounding the Isles of Shoals, Gulf of Maine were collected from May 1985 to August 1986 in sampling bottles, fixed in Bouin's solution, and quantitatively protargol stained. Cell abundance and biomass were separated into four size classes. Large species were prevalent in the spring while smaller species dominated in the summer. Ciliate abundance ranged from 0.35 to 6×106 m-3 annually while biomass ranged from 2.7 to 240 J m-3. Production, estimated using a multiple regression equation which incorporated ambient temperature and cell volume, ranged from 2.5 to 105 J m-3d-1. A model was constructed to determine the relative importance of ciliates in the planktonic food web. Blooms could provide a brief but significant transfer of energy to upper trophic levels. However, at best, ciliates may contribute 12% to the copepod ration and 3% of their available food.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00644973
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Mesoscale, finescale and microscale distribution of micro- and nanoplankton in the Irish Sea, with emphasis on ciliates and their prey (1999)
    Springer
    Marine biology 134 (1999), S. 167-179 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We examined the degree of mesoscale (km), finescale (m), and microscale (cm) patchiness of ciliates and their prey in waters of varying hydrographic conditions. Samples were taken throughout the water column, along a transect across the Irish Sea (54°N), at scales ranging from 0.15 to 105 m. We examined physical, chemical, and biological characteristics. The eastern and western Irish Sea were stratified, with a pycnocline at ∼20 to 30 m. The central waters were mixed and had adjacent frontal regions. Euphotic depth was ∼20 to 35 m. Generally, the upper waters were nitrogen-limited, with elevated levels associated with frontal regions and deeper waters. Microphytoplankton exhibited fine-mesoscale patchiness: diatom numbers were low in stratified waters, with higher levels in mixed and frontal regions; dinoflagellates were abundant in subsurface waters near the fronts. Nanoflagellate numbers and biomass decreased with depth below the pycnocline, and exhibited microscale distribution in upper waters; these micropatches may provide increased food levels for ciliates. Microscale distribution of ciliates was rare and only occurred at mixed/frontal sites; finescale ciliate patches were a more prominent feature of the water column. These finescale patches can be composed of a variety of taxa but can also be virtually monospecific. Finescale patches may produce localised regions of high productivity that is available to fishes and copepods, but may also be a sink, as patches can be short-lived and thus unavailable to predators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270050535
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  • 4
    Electronic Resource
    Electronic Resource
    Divider size and the cell cycle after prolonged starvation ofTetrahymena corlissi (1987)
    Springer
    Microbial ecology 13 (1987), S. 115-127 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cell growth and division of the ciliateTetrahymena corlissi were examined upon refeeding after prolonged starvation of up to 12 days. Division did not automatically occur when a certain critical cell size was reached. Rather, it varied both with the nutritional history of the cell and the nutrient conditions in which the cell was growing. Upon refeeding, cells starved for 12 days divided at a smaller size and later than cells starved for 6 days. Cells refed at high density took longer to begin division than cells refed at low density. The results are discussed with respect to the “relative starvation” and “critical constituent” models of the cell cycle and in terms of the polymorphic life cycle ofTetrahymena species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02011248
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  • 5
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    Genetic legacy in a marine protist [Evolution] (2012)
    National Academy of Sciences
    Details
    Publication Date: 2012-12-19
    Description: The mechanisms that underpin the varied spatial genetic structures exhibited by free-living marine microorganisms remain controversial, with most studies emphasizing a high dispersal capability that should redistribute genetic diversity in contrast to most macroorganisms whose populations often retain a genetic signature of demographic response to historic climate fluctuations. We quantified...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 6
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    Comparing the Trophic Impact of Microzooplankton during the Spring and Autumn Blooms in Temperate Waters (2020)
    SPRINGER
    In:  EPIC3Estuaries and Coasts, SPRINGER, ISSN: 1559-2723
    Details
    Publication Date: 2020-07-22
    Description: To appreciate coastal trophodynamics, it is necessary to understand the dynamics and control of the spring and late summer/autumn phytoplankton blooms. Classically mesozooplankton are considered as main players in these blooms. Microzooplankton likely also are important in these dynamics, but their role is poorly understood. Critically, due to their rapid generation times, microzooplankton may exhibit rapid shifts during blooms. Through field sampling and rate measurements (dilution experiments) in a well-studied temperate coastal ecosystem (Helgoland, southern North Sea) we ask if there are differences in the trends exhibited between and within the spring and late summer/autumn blooms. To achieve this, we examined early, mid and late bloom periods in both seasons. We found 1) a shift in trophic composition during both blooms, with a trend from strongly autotrophic mixotrophs (e.g.Mesodinium) to mixotrophs and then towards heterotrophs; 2) an increase in intraguild predation at the end of the blooms; and 3) although microzooplankton were major consumers of the spring bloom (grazing coefficientg: 0.23-0.25 d(-1); daily percent loss of productionP(p): 36-47%), they were unlikely to control it, while in contrast, microzooplankton appeared to play a major role in controlling the late summer/autumn bloom (grazing coefficientg: 0.14-1.53 d(-1); daily percent loss of productionP(p): 24-103%). In doing so, we suggest that any simplifications that consider these seasonal blooms to be relatively homogeneous and similar will lead to substantial errors in the assessment of coastal trophodynamics.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
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  • 7
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    Comparing the Trophic Impact of Microzooplankton during the Spring and Autumn Blooms in Temperate Waters (2021)
    In:  EPIC3Estuaries and Coasts
    Details
    Publication Date: 2021-01-04
    Description: To appreciate coastal trophodynamics, it is necessary to understand the dynamics and control of the spring and late summer/autumn phytoplankton blooms. Classically mesozooplankton are considered as main players in these blooms. Microzooplankton likely also are important in these dynamics, but their role is poorly understood. Critically, due to their rapid generation times, microzooplankton may exhibit rapid shifts during blooms. Through field sampling and rate measurements (dilution experiments) in a well-studied temperate coastal ecosystem (Helgoland, southern North Sea) we ask if there are differences in the trends exhibited between and within the spring and late summer/autumn blooms. To achieve this, we examined early, mid and late bloom periods in both seasons. We found 1) a shift in trophic composition during both blooms, with a trend from strongly autotrophic mixotrophs (e.g. Mesodinium) to mixotrophs and then towards heterotrophs; 2) an increase in intraguild predation at the end of the blooms; and 3) although microzooplankton were major consumers of the spring bloom (grazing coefficient g: 0.23–0.25 d−1; daily percent loss of production Pp: 36–47%), they were unlikely to control it, while in contrast, microzooplankton appeared to play a major role in controlling the late summer/autumn bloom (grazing coefficient g: 0.14–1.53 d−1; daily percent loss of production Pp: 24–103%). In doing so, we suggest that any simplifications that consider these seasonal blooms to be relatively homogeneous and similar will lead to substantial errors in the assessment of coastal trophodynamics.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    PAPER (OA)
  • 8
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    An online guide to UK harmful phytoplankton (2006)
    In:  EPIC3Harmful algae news, 30. {http://ioc.unesco.org/hab/news.htm}, 4, ISSN: 0020-7918
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , notRev
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  • 9
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    The UK Harmful Phytoplankton Projects - Links to PLANKTON*NET (2005)
    In:  EPIC3Workshop on dinoflagellates and their cysts, 31. Aug.-2. Sept., Liverpool, UK.
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 10
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    Use of online resources in the taxonomy and ecology of harmful phytoplankton (2004)
    In:  EPIC3Phycological Research,52, 4, pp. 414-418
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Format: application/pdf
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