Light and Phosphate Competition Between Cylindrospermopsis raciborskii and Microcystis aeruginosa is Strain Dependent

The hypothesis that outcomes of phosphorus and light competition between Cylindrospermopsis raciborskii and Microcystis aeruginosa are strain dependent was tested experimentally. Critical requirements of phosphorus (P*) and of light (I*) of two strains of each species were determined through monocul...

Full description

Saved in:

Bibliographic Details
Published in:	Microbial ecology Vol. 66; no. 3; pp. 479 - 488
Main Authors:	Marinho, Marcelo Manzi, Souza, Maria Betânia Gonçalves, Lürling, Miquel
Format:	Journal Article
Language:	English
Published:	New York Springer Science + Business Media 01-10-2013 Springer US Springer Springer Nature B.V
Subjects:	Biological and medical sciences Biomedical and Life Sciences Cell growth Competition Cyanobacteria cyanobacterium microcystis Cylindrospermopsis - metabolism Cylindrospermopsis - radiation effects Cylindrospermopsis raciborskii Ecological competition Ecology Ecophysiology environmental-conditions Fresh Water - microbiology Fundamental and applied biological sciences. Psychology genetic diversity Geoecology/Natural Processes growth harmful algal blooms lake Life Sciences Light Microbial Ecology Microbiology MICROBIOLOGY OF AQUATIC SYSTEMS Microcystins Microcystis - metabolism Microcystis - radiation effects Monoculture Nature Conservation Phosphates Phosphates - metabolism Phosphorus Phytoplankton phytoplankton communities Species Species Specificity temperature Water Quality/Water Pollution Microcystis Aeruginosa Light Limitation Strong Competitor Competition Experiment Phosphorus Limitation Competition Phosphates Microcystis aeruginosa Light Cyanobacteria Bacteria Environmental factor Ecology Strain
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	The hypothesis that outcomes of phosphorus and light competition between Cylindrospermopsis raciborskii and Microcystis aeruginosa are strain dependent was tested experimentally. Critical requirements of phosphorus (P) and of light (I) of two strains of each species were determined through monoculture experiments, which indicated a trade-off between species and also between Microcystis strains. Competition experiments between species were performed using the weakest predicted competitors (with the highest values of P* and of I) and with the strongest predicted competitors (with the lowest values of P and of I*). Under light limitation, competition between the weakest competitors led C. raciborskii to dominate. Between the strongest competitors, the opposite was observed, M. aeruginosa displaced C. raciborskii, but both strains co-existed in equilibrium. Under phosphate limitation, competition between the weakest competitors led C. raciborskii to exclude M. aeruginosa, and between the strongest competitors, the opposite was observed, M. aeruginosa displaced C. raciborskii, but the system did not reach an equilibrium and both strains were washed out. Hence, outcomes of the competition depended on the pair of competing strains and not only on species or on type of limitation. We concluded that existence of different trade-offs among strains and between species underlie our results showing that C. raciborskii can either dominate or be displaced by M. aeruginosa when exposed to different conditions of light or phosphate limitation.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	0095-3628 1432-184X
DOI:	10.1007/s00248-013-0232-1