Abstract
Seasonal variations in the cell volume, number of cells in a colony and trichome length of nine bloom-forming cyanobacteria species were investigated in a small eutrophic pond from May to November 2005. The main genera of cyanobacteria were Microcystis and Anabaena, which formed a dense bloom from July to August. M. aeruginosa, M. viridis and M. wesenbergii were present throughout the study period. M. viridis dominated the Microcystis population (39.2–67.1% of total biovolume) during the pre-blooming period, but M. aeruginosa and M. wesenbergii dominated after July. M. aeruginosa was the dominant species from July to November, constituting 49.0–93.2% of the Microcystis population. Each Microcystis species could always be identified from the cell volume and the number of cells in a colony. The numbers of cells in colonies of M. aeruginosa, M. viridis and M. wesenbergii were in the ranges 37–444, 28–143 and 50–264, respectively. The Anabaena population consisted of three species—A. crassa, A. flos-aquae and A. reniformis. A. crassa and A. flos-aquae were typically present at higher densities than A. reniformis. These species also showed distinctive cell volumes. The number of cells in colonies of A. crassa, A. flos-aquae and A. reniformis were in the ranges 19–178, 18–113 and 29–143, respectively. Planktothrix raciborskii and Raphidiopsis mediterranea appeared in August and Aphanizomenon flos-aquae increased from late October, although these species were less abundant. Cell volumes of Microcystis and Anabaena and trichome length of P. raciborskii were positively correlated with water temperature. Small colonies of Microcystis and Anabaena remained small during the bloom period. In contrast, the trichome length of P. raciborskii seemed to depend more strongly on growth conditions.







Similar content being viewed by others
References
Bendschneider K, Robinson RJ (1952) A new spectrophotometric method for the determination of nitrite in sea water. J Mar Res 11:87–96
Brunberg AK, Blomqvist P (2003) Recruitment of Microcystis (Cyanophyceae) from lake sediments: the importance of littoral inocula. J Phycol 39:58–63
Chan F, Pace ML, Howarth RW, Marino RM (2004) Bloom formation in heterocystic nitrogen-fixing cyanobacteria: the dependence on colony size and zooplankton grazing. Limnol Oceanogr 49:2171–2178
El Herry S, Nasri H, Bouaïcha N (2008) Morphological and phylogenetic analysis of colonies of Microcystis morphospecies isolated from the Lebna Dam, Tunisia. Afr J Microb Res 2:340–348
Ghadouani A, Pinel-Alloul B, Prepas EE (2003) Effects of experimentally induced cyanobacterial blooms on crustacean zooplankton communities. Freshw Biol 48:363–381
Gugger M, Lyra C, Henriksen P, Couté A, Humbert J-F, Sivonen K (2002) Phylogenetic comparison of the cyanobacterial genera Anabaena and Aphanizomeon. Int J Syst Evol Microbiol 52:1867–1880
Honma T, Park HD (2005) Influences of nitrate and phosphate concentrations on Microcystis composition and microcystin concentration in Lake Suwa. J Jpn Soc Water Environ 28:373–378 (in Japanese)
Ibelings BW, Mur LR, Walsby AE (1991) Diurnal changes in buoyancy and vertical distribution in populations of Microcystis in two shallow lakes. J Plankton Res 13:419–436
Imai H, Chang K, Kusaba M, Nakano S (2009) Temperature-dependent dominance of Microcystis (Cyanophyceae) species: M. aeruginosa and M. wesenbergii. J Plankton Res 31:171–178
Jarvis AC, Hart RC, Combrink S (1987) Zooplankton feeding on size fractionated Microcystis colonies and Chlorella in hypertrophic lake (Hartbeespoort Dam, South Africa): implications to resource utilization and zooplankton succession. J Plankton Res 9:1231–1249
Komárek J (1991) A review of water-bloom forming Microcystis species, with regard to populations from Japan. Algol Stud 64:115–127
Kromkamp J, Walsby AE (1990) A computer model of buoyancy and vertical migration in cyanobacteria. J Plankton Res 12:161–183
Kurmayer R, Christiansen G, Chorus I (2003) The abundance of microcystin-producing genotypes correlates positively with colony size in Microcystis sp. and determines its microcystin net production in Lake Wannsee. Appl Environ Microbiol 69:787–795
Li R, Watanabe M, Watanabe MM (1997) Akinete formation in planktonic Anabaena spp. (cyanobacteria) by treatment with low temperature. J Phycol 33:576–584
Mullin JB, Riley JP (1955) The spectrophotometric determination of nitrate in natural waters, with particular reference to sea-water. Anal Chim Act 12:464–480
Murphy JB, Riley JP (1962) A modified single solution method for the determination of phosphate in natural waters. Anal Chim Acta 27:31–36
Nakanishi M, Miyajima T, Nakano S, Tezuka Y (1992) Studies on the occurrence of Anabaena and Microcystis blooms in Akanoi bay of the south basin of Lake Biwa, with special attention to nutrient levels. Ann Rept Interdiscip Res Inst Environ Sci 11:67–75
Otsuka S, Suda S, Li R, Matsumoto S, Watanabe MM (2000) Morphological variability of colonies of Microcystis morphospecies in culture. J Gen Appl Microbiol 46:39–50
Otsuka S, Suda S, Shibata S, Oyaizu H, Matsumoto S, Watanabe MM (2001) A proposal for the unification of five species of the cyanobacterial genus Microcystis Kützing ex Lemmermann 1907 under the rules of the Bacteriological Code. Int J Syst Evol Microbiol 51:873–879
Paerl HW, Ustach JF (1982) Blue-green algal scums: an explanation for their occurrence during freshwater blooms. Limnol Oceanogr 27:212–217
Park HD, Iwami C, Watanabe MF, Harada K, Okino T, Hayashi H (1998) Temporal variabilities of the concentrations of intra- and extracellular microcystin and toxic Microcystis species in a hypertrophic lake, Lake Suwa, Japan (1991–1994). Environ Toxicol Water Qual 13:61–72
Pechar L, Masojídek J (1995) Colonial forms of the cyanobacterium Aphanizomenon flos-aquae represent protection against photosystem II photo-inactivation – fluorescence quenching analysis. Algol Stud 77:37–43
Rengefors K, Gustafsson S, Ståhl-Delbanco A (2004) Factors regulating the recruitment of cyanobacterial and eukaryotic phytoplankton from littoral and profundal sediments. Aquat Microb Ecol 36:213–226
Sagi T (1966) Determination of ammonia in sea water by the indophenol method and its application to the coastal and off-shore waters. Oceanogr Mag 18:43–51
Scheffer M, Rinaldi S, Gragnani A, Mur LR, Van Nes EH (1997) On the dominance of filamentous cyanobacteria in shallow, turbid lakes. Ecology 78:272–282
Ståhl-Delbanco A, Hansson LA, Gyllström M (2003) Recruitment of resting stages may induce blooms of Microcystis at low N:P ratios. J Plankton Res 25:1099–1106
Takano K, Hino S (2009) Phylogenic analysis of Aphanizomenon flos-aquae distributed in Japan on partial sequence of rbc LX. Jpn J Limnol 69:247–253 (in Japanese)
Tezuka Y, Nakano S (1993) Induction of Anabaena bloom by nutrient enrichment to lake water collected from the south basin of Lake Biwa. Jpn J Limnol 54:85–90
Thomas RH, Walsby AE (1986) The effect of temperature on recovery of buoyancy by Microcystis. J Gen Microbiol 132:1665–1672
Tsujimura S (2004) Reduction of germination frequency of Anabaena akinetes by sediment drying: a possible method by which to inhibit bloom formation. Water Res 38:4361–4366
Tsujimura S, Okubo T (2003) Development of Anabaena blooms in a small reservoir with dense sediment akinete population, with special reference to temperature and irradiance. J Plankton Res 25:1059–1067
Tsujimura S, Ishikawa K, Tsukada H (2001) Effect of temperature on growth of the cyanobacterium Aphanizomenon flos-aquae in Lake Biwa and Lake Yogo. Phycol Res 49:275–280
Tsukada H (2006) A study on the life history and the factor affecting the dominance of Microcystis in eutrophic lakes. Ph. D. Thesis. Kyoto University, Kyoto, Japan
Tsukada H, Tsujimura S, Nakahara H (2006) Seasonal succession of phytoplankton in Lake Yogo over 2 years: effect of artificial manipulation. Limnology 7:3–14
Watanabe M (1985) Phytoplankton studies of Lake Kasumigaura (2) on some rare or interesting algae. Bull Natl Sci Mus Tokyo Ser B 11:137–142 (in Japanese)
Watanabe M (1991) Studies on the planktonic blue-green algae 3. Some Aphanizomenon species in Hokkaido, northern Japan. Bull Natl Sci Mus Tokyo Ser B 17:141–150
Watanabe M (1996) Studies on planktonic blue-green algae 6. Bloom forming species in Lake Biwa (Japan) in the summer of 1994. Bull Natl Sci Mus Tokyo Ser B 22:1–10
Watanabe M (1998) Studies on planktonic blue-green algae 8. Anabaena species with twisted trichomes in Japan. Bull Natl Sci Mus Tokyo Ser B 24:1–13
Wilson AE, Wilson WA, Hay ME (2006) Intraspecific variation in growth and morphology of the bloom-forming cyanobacteria Microcystis aeruginosa. Appl Environ Microbiol 72:7386–7389
Xie LQ, Xie P, Tang HJ (2003) Enhancement of dissolved phosphorus release from sediment to lake water by Microcystis blooms – an enclosure experiment in a hyper-eutrophic, subtropical Chinese lake. Environ Pollut 122:391–399
Yamamoto Y (2009) Environmental factors that determine the occurrence and seasonal dynamics of Aphanizomenon flos-aquae. J Limnol 68:122–132
Yamamoto Y, Nakahara H (2005) The formation and degradation of cyanobacterium Aphanizomenon flos-aquae blooms: the importance of pH, water temperature, and day length. Limnology 6:1–6
Yamamoto Y, Nakahara H (2006) Importance of interspecific competition in the abundance of Aphanizomenon flos-aquae (Cyanophyceae). Limnology 7:163–170
Yang Z, Kong F, Shi X, Zhang M, Xing P, Cao H (2008) Changes in the morphology and polysaccharide content of Microcystis aeruginosa (cyanobacteria) during flagellate grazing. J Phycol 44:716–720
Acknowledgments
We are grateful to Dr. H. Tsukada for providing the environmental data on Hirosawa-no-ike Pond in 2003 and 2004. We would like to thank L. Chen for her suggestions in revising the earlier version of the manuscript. T. Knoy is appreciated for his editorial assistance. Thanks to Dr. M. Morris for editing the English. We would like to thank two anonymous reviewers for their insightful comments and suggestions. This research complies with the current laws of Japan.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Yamamoto, Y., Nakahara, H. Seasonal variations in the morphology of bloom-forming cyanobacteria in a eutrophic pond. Limnology 10, 185–193 (2009). https://doi.org/10.1007/s10201-009-0270-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10201-009-0270-z


