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The diversity and ecological impact of amoebae grazing on the bloom-forming cyanobacterium Microcystis

Jeroen Van Wichelen (2015)
abstract
Cultural eutrophication has caused the deterioration of many shallow standing waters all over the world. Especially cyanobacteria, notorious for their toxins, proliferate at elevated nutrient concentrations thus hampering the amenities provided by the affected waters. To halt and reduce cyanobacterial bloom formation, a good ecological knowledge on the natural dynamics of these blooms is indispensable. Top-down effects (e.g. zooplankton grazing) are traditionally believed to be of minor influence due to the unpalatability of many cyanobacteria. There is however increasing evidence that specific micro-organisms are able to thrive on cyanobacterial food, seemingly less hampered by size and biochemical constrains. The work presented in this dissertation shows the importance of highly specialized grazing amoebae for the dynamics of natural Microcystis blooms, highlighting the ecological significance of microbial antagonists for cyanobacterial bloom dynamics. Their activities can at times be a major loss factor for Microcystis blooms but long-term effects on bloom biomass may be prevented by the high functional and genetic diversity of natural Microcystis blooms, allowing rapid microevolution to defended genotypes, which may be key to its ecological success.
Please use this url to cite or link to this publication:
author
promoter
UGent and
organization
year
type
dissertation
publication status
published
subject
keyword
amoebae, eutrophication, harmful algal blooms, microbial interactions, Microcystis, shallow lakes, pond, cyanobacteria
pages
226 + annexes pages
publisher
Ghent University. Faculty of Sciences
place of publication
Ghent, Belgium
defense location
Gent : Het Pand (zaal rector Vermeylen)
defense date
2015-10-09 16:00
project
B-Blooms 2
language
English
UGent publication?
yes
classification
D1
copyright statement
I have transferred the copyright for this publication to the publisher
id
6958693
handle
http://hdl.handle.net/1854/LU-6958693
date created
2015-10-12 21:28:38
date last changed
2017-01-16 10:49:40
@phdthesis{6958693,
  abstract     = {Cultural eutrophication has caused the deterioration of many shallow standing waters all over the world. Especially cyanobacteria, notorious for their toxins, proliferate at elevated nutrient concentrations thus hampering the amenities provided by the affected waters. To halt and reduce cyanobacterial bloom formation, a good ecological knowledge on the natural dynamics of these blooms is indispensable. Top-down effects (e.g. zooplankton grazing) are traditionally believed to be of minor influence due to the unpalatability of many cyanobacteria. There is however increasing evidence that specific micro-organisms are able to thrive on cyanobacterial food, seemingly less hampered by size and biochemical constrains.
The work presented in this dissertation shows the importance of highly specialized grazing amoebae for the dynamics of natural Microcystis blooms, highlighting the ecological significance of microbial antagonists for cyanobacterial bloom dynamics. Their activities can at times be a major loss factor for Microcystis blooms but long-term effects on bloom biomass may be prevented by the high functional and genetic diversity of natural Microcystis blooms, allowing rapid microevolution to defended genotypes, which may be key to its ecological success.},
  author       = {Van Wichelen, Jeroen},
  keyword      = {amoebae,eutrophication,harmful algal blooms,microbial interactions,Microcystis,shallow lakes,pond,cyanobacteria},
  language     = {eng},
  pages        = {226 + annexes},
  publisher    = {Ghent University. Faculty of Sciences},
  school       = {Ghent University},
  title        = {The diversity and ecological impact of amoebae grazing on the bloom-forming cyanobacterium Microcystis},
  year         = {2015},
}

Chicago
Van Wichelen, Jeroen. 2015. “The Diversity and Ecological Impact of Amoebae Grazing on the Bloom-forming Cyanobacterium Microcystis”. Ghent, Belgium: Ghent University. Faculty of Sciences.
APA
Van Wichelen, J. (2015). The diversity and ecological impact of amoebae grazing on the bloom-forming cyanobacterium Microcystis. Ghent University. Faculty of Sciences, Ghent, Belgium.
Vancouver
1.
Van Wichelen J. The diversity and ecological impact of amoebae grazing on the bloom-forming cyanobacterium Microcystis. [Ghent, Belgium]: Ghent University. Faculty of Sciences; 2015.
MLA
Van Wichelen, Jeroen. “The Diversity and Ecological Impact of Amoebae Grazing on the Bloom-forming Cyanobacterium Microcystis.” 2015 : n. pag. Print.