2014
DOI: 10.1007/s12237-014-9891-5
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Bloom-Forming Microalgae in High-Species Phytoplankton Assemblages Under Light-Fluctuating and Low Phosphate Conditions

Abstract: Wide changes of key environmental conditions prevented competitive exclusion in the phytoplankton assemblage of a turbid shallow wetland complex artificially managed for aquaculture production (Doñana Natural Park, SW Spain), and some genera showed specific adaptations to exploit those changes. The seasonal pattern of light, temperature and conductivity was frequently overridden by irregular events of sediment resuspension. Consequently, these shallow aquaculture ponds exhibited wide fluctuations of underwater… Show more

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Cited by 6 publications
(6 citation statements)
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“…Despite the intrinsic difficulty for microscopic visualization of microalgae species in the highly turbid GRE waters, a set of 53 different genera could be identified without including those unidentified coccoid and microflagellate microalgae. A similar result has been reported in managed ponds receiving exclusively GRE waters [54]. If the generally accepted underestimation of phytoplankton species richness using microscopy [58] is also assumed, it is obvious the actual number of phytoplankton taxa must be noticeably higher in the GRE.…”
Section: Discussionsupporting
confidence: 81%
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“…Despite the intrinsic difficulty for microscopic visualization of microalgae species in the highly turbid GRE waters, a set of 53 different genera could be identified without including those unidentified coccoid and microflagellate microalgae. A similar result has been reported in managed ponds receiving exclusively GRE waters [54]. If the generally accepted underestimation of phytoplankton species richness using microscopy [58] is also assumed, it is obvious the actual number of phytoplankton taxa must be noticeably higher in the GRE.…”
Section: Discussionsupporting
confidence: 81%
“…Although the Chlorophyceae+Trebouxiophyceae did not show a marked seasonality in the GRE, FAs indicated their significant lower presence during summer, contrasting with the late spring-summer peak reported for the Nervion Estuary [73]. Low seasonal variability was also inferred from FAs in the Cyanophyceae, with lack of any typical summer peak that has also been found in marsh ponds receiving waters from the GRE [54, 55]. This is an opposite situation to that described in the Neus River Estuary [3] and the less turbid and less nitrogen loaded Guadiana Estuary where Cyanobacteria consistently exhibited summer peaks [21].…”
Section: Discussionmentioning
confidence: 97%
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“…Hap‐A abundances are also positively correlated with chytrid fungi (Euk_03_505, Euk_03_67), known aquatic decomposers that can operate as algal parasites (Ibelings et al ). Hap‐B abundances were negatively correlated with phosphate concentrations and positively correlated with a Diacronema (Pavlovales) haptophyte (Euk_03_140), species of which have been shown to possess a competitive advantage to other algae during low phosphate conditions (Fernández‐Rodríguez et al ). Future studies focused on experimental manipulations of the Lake George microbial consortium will help to better resolve these potential correlative or causative microbial interactions and to determine if Hap‐A and Hap‐B species exhibit competitive exclusion when cultured in tandem.…”
Section: Discussionmentioning
confidence: 99%