Growth interactions among blue-green (Anabaena Oscillarioides, Microcystis aeruginosa) and green (Chlorella sp.) algae

Lam, Catherine W. Y.; Silvester, Warwick B.

doi:10.1007/bf00030076

Cited by 43 publications

(21 citation statements)

References 28 publications

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“…This is due to that Cyanophyceae prefers steady, transparent and low nutrients water. Cyanophyceae assimilates phosphate at a faster rate than other algal groups and accumulates large amount of reserve phosphate for extended growth periods at low phosphate concentration (Lam and Silvester, 1979). These results coincided with the findings of Tessy (2001) at Lake Taxoma.…”

Section: Discussionsupporting

confidence: 87%

Variation of water quality and phytoplankton along different zones of Aswan High Dam Reservoir

Salem

2011

Egypt. J. of Aquatic Biolo. and Fish.

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ABSTRACThis study was carried out at Aswan High Dam Reservoir and focused on the spatial variation of water quality parameters and phytoplankton composition. Water samples were collected from eighteen sampling stations, where six stations for each of the different zones were selected to represent the lacustrine, transition and riverine zones of the reservoir during 2007 and 2008.The results of the environmental factors showed wide variations in their concentrations along the different zones of the reservoir.In this study, chlorophyll a concentration was lower in the lacustrine zone than in the riverine, although turbidity and secchi depth values were all optimal for light availability. This result was influenced by higher abundances in the reservoir phytoplankton assemblages where riverine conditions predominate, by species tolerant to turbulent conditions and typical high mineral turbidity. Calculation of the trophic state index showed that riverine and transition zones are classified as eutrophic, while lacustrine zone is mesotrophic. Phytoplankton composition recorded thirty nine species belonging to Chlorophyceae (19 species), Cyanophyceae (10 species), Bacillariophyceae (7 species), and rare groups including Dinophyceae (2 species) and Eugelnophceae (1 species). Cyanophyceae were the most encountered group in the lacustrine and transition zones, while Bacillariophyceae were most encountered group in the riverine zone. This is due to that Cyanophyceae prefer the steady, transparent and low nutrients water (lacustrine), while Bacillariophyceae prefer flowing, turbid and nutrient-rich water (riverine).Statistical analysis showed that certain environmental factors do affect the phytoplankton growth. The results of the one-way ANOVA revealed that the different environmental factors (DO, water temperature, secchi depth, water velocity, turbidity, nitrate, phosphorus, magnesium, total dissolved solids, and trophic state index) and biotic factors (such as chlorophyll a and phytoplankton groups) were significantly different at the three zones of Aswan High Dam Reservoir (p<0.05). This result supports the speculation of variation in water quality and phytoplankton along the different zones of the reservoir.

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Section: Discussionsupporting

confidence: 87%

Variation of water quality and phytoplankton along different zones of Aswan High Dam Reservoir

Salem

2011

Egypt. J. of Aquatic Biolo. and Fish.

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“…These toxins act primarily on vertebrates, and there is little evidence that intact cells release these compounds in significant concentrations to the surrounding medium. The physiological, ecological, and evolutionary aspects of cyanotoxin production for the producing cyanobacteria is not well known (Kaebernick and Neilan, 2001), although some reports indicate allelopathic activity in Microcystis ( Lam and Silvester, 1979), and see Maestrini and Bonin (198 1) for discussion. Chlorella pyrenoidosa was inhibited by lipids from Microcystis aeruginosa (Ikawa et al, 1996).…”

Section: Cyanobacteriamentioning

confidence: 99%

Allelopathy of Aquatic Autotrophs

Gross¹

2003

Critical Reviews in Plant Sciences

539

355

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Allelopathy in aquatic environments may provide a competitive advantage to angiosperms, algae, or cyanobacteria in their interaction with other primary producers. Allelopathy can influence the competition between different photoautotrophs for resources and change the succession of species, for exarnple, in phytoplankton cornmunities. Field evidence and laboratory studies indicate that allelopathy occurs in all aquatic habitats (marine and freshwater), and that ail prirnary producing organisms (cyanobacteria, micro-and macroalgae as well as angiospenns) are capable of producing and releasing allelopathically active compounds. Although allelopathy also includes positive (stimulating) interactions, the majority of studies describe the inhibitory activity of ailelopathicaily active compounds. Different mechanisms operate depending on whether allelopathy takes place in the Open water (pelagic zone) or is Substrate associated (benthic habitats). Allelopathical interactions are especiaily common in fully aquatic species, such as submersed macrophytes or benthic algae and cyanobacteria. The prevention of shading by epiphytic and planktonic primary producers and the competition for space may be the ultimate cause for allelopathical interactions. Aquatic ailelochemicals often target multiple physiological processes. The inhibition of photosynthesis of competing primary producers seems tobe a frequent mode of action. Multiple biotic and abiotic factors determine the strength of allelopathic interactions. Bacteria associated with the donor or target organism can metabolize excreted aiielochemicals. Frequently, the impact of surplus or limiting nutrients has been shown to affect the overail production of allelochemicals and their effect on target species. Similarities and differences of ailelopathic interactions in marine and freshwater habitats as well as between the different types of producing organisms are discussed.

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“…LAM and SILVESTER (1979) found that Microcystis could inhibit Chlorella growth at relatively high initial cell concentrations (> 3.0 × 10 6 cells mL -1 ). REYNOLDS et al (1981) also observed that a massive cell density of Microcystis was toxic to Asterionella, Eudorina and Chlorella.…”

Section: Introductionmentioning

confidence: 98%

Effects of Interspecific Interactions between Microcystis aeruginosa and Chlorella pyrenoidosa on Their Growth and Physiology

Zhang

Kong²,

Xing

et al. 2007

International Review of Hydrobiology

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Effects of Interspecific Interactions between Microcystis aeruginosaand Chlorella pyrenoidosa on Their Growth and Physiology key words: flow cytometry, Phyto-PAM, interspecific interaction, maximum quantum yield, metabolic activity AbstractInteractions between Microcystis aeruginosa and Chlorella pyrenoidosa were analyzed by flow cytometry and by phytoplankton pulse-amplitude-modulated fluorimetry (Phyto-PAM) in joint cultures as well as in cultures separated by dialysis membranes. Results showed that the growth of C. pyrenoidosa was greater than that of M. aeruginosa, and that the growth of M. aeruginosa but not the growth of C. pyrenoidosa was significantly inhibited by the interactions between M. aeruginosa and C. pyrenoidosa. Culture filtrates of these two algae showed no apparent effects on the growth of the competing species. For M. aeruginosa, decreases in esterase activity, chlorophyll a fluorescence, and maximum quantum yield were observed in joint cultures, indicating that the metabolic activity and photosynthetic capacity of M. aeruginosa were suppressed. Light limitation from the shading effect of C. pyrenoidosa may be the main reason for such inhibition. For C. pyrenoidosa, esterase activity was suppressed in membrane-separated and joint cultures, suggesting that C. pyrenoidosa was probably affected by allelopathic substances secreted by M. aeruginosa. However, no significant difference was observed in the chlorophyll a fluorescence and maximum quantum yield of C. pyrenoidosa in the two cultures. In addition, interspecific interactions induced a reduction in size in both M. aeruginosa and C. pyrenoidosa, which may contribute to the development of C. pyrenoidosa dominance in the present study. IntroductionCyanobacterial blooms, such as that of Microcystis, pose a serious threat to ecological and public health. Such blooms often produce toxins which affect other aquatic organisms as well as animals and humans that utilize the water by causing hepato-toxicity and odor problems (CODD et al., 1999;DINGA et al., 1999). Cyanobacterial assemblage formation is mainly controlled by temperature, wind and turbidity (CHEN et al., 2003), while biomass accumulation is attributed to the ability of cyanobacteria to take better advantage of available nutrients (CHEN et al., 2003) than other species, as well as their regulation of buoyancy to balance the avoidance of harmful ultraviolet radiation and sufficient use of light energy (MITROVIC et al., 2001), colony formation to decrease zooplankton grazing (FULTON and PAERL, 1987), and adaptations to both high temperatures (ROBARTS and ZOHARY, 1987) and low light intensities (SCHUBERT et al., 1995;SCHEFFER et al., 1997). Additionally, interactions between phytoplankton species have been considered important factors affecting phytoplankton succession (MAESTRINI and BONIN, 1981;RICE, 1984;HONJO, 1994

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Growth interactions among blue-green (Anabaena Oscillarioides, Microcystis aeruginosa) and green (Chlorella sp.) algae

Cited by 43 publications

References 28 publications

Variation of water quality and phytoplankton along different zones of Aswan High Dam Reservoir

Variation of water quality and phytoplankton along different zones of Aswan High Dam Reservoir

Allelopathy of Aquatic Autotrophs

Effects of Interspecific Interactions between Microcystis aeruginosa and Chlorella pyrenoidosa on Their Growth and Physiology

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