Large variation in vulnerability to grazing within a population of the colonial phytoplankter, Microcystis aeruginosa

Jeffrey D. White, Raj Reni B Kaul, Lesley B. Knoll, Alan E. Wilson, Orlando Sarnellea

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We asked if intraspecific variation within a population of the toxic, bloom-forming phytoplankter, Microcystisaeruginosa, leads to differential vulnerability to grazing by the invasive, filter-feeding zebra mussel (Dreissenapolymorpha). We performed two series of laboratory feeding experiments in which D. polymorpha were presentedwith several different sympatric M. aeruginosa clones in a two-species mixture with the high-quality, nutritiousalga, Ankistrodesmus falcatus. Mean selectivity across M. aeruginosa clones ranged from near zero (i.e., no feedingon M. aeruginosa) to near one (equal feeding on the two algal species), evidence of maximal variation in grazingvulnerability across twenty clones of M. aeruginosa-a species assumed to be largely 'inedible' to grazers-fromthe same population. This range of vulnerability is essentially equal to that typically measured across allphytoplankton species. Large intraspecific variation in grazing vulnerability, and its ecological consequences,could influence the promotion or control of noxious blooms of toxigenic cyanobacteria.

Original languageEnglish (US)
Pages (from-to)1714-1724
Number of pages11
JournalLimnology and Oceanography
Volume56
Issue number5
DOIs
StatePublished - Sep 1 2011

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Microcystis aeruginosa
vulnerability
grazing
clone
intraspecific variation
clones
algal bloom
Ankistrodesmus falcatus
filter feeding
Dreissena polymorpha
cans
Cyanobacteria
cyanobacterium
environmental impact
experiment

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Large variation in vulnerability to grazing within a population of the colonial phytoplankter, Microcystis aeruginosa. / White, Jeffrey D.; Kaul, Raj Reni B; Knoll, Lesley B.; Wilson, Alan E.; Sarnellea, Orlando.

In: Limnology and Oceanography, Vol. 56, No. 5, 01.09.2011, p. 1714-1724.

Research output: Contribution to journalArticle

White, Jeffrey D. ; Kaul, Raj Reni B ; Knoll, Lesley B. ; Wilson, Alan E. ; Sarnellea, Orlando. / Large variation in vulnerability to grazing within a population of the colonial phytoplankter, Microcystis aeruginosa. In: Limnology and Oceanography. 2011 ; Vol. 56, No. 5. pp. 1714-1724.
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