Factors regulating recruitment from the sediment to the water column in the bloom‐forming cyanobacterium <i>Gloeotrichia echinulata</i>

Karlsson-Elfgren, Irene; Rengefors, Karin; Gustafsson, Susanne

doi:10.1111/j.1365-2427.2004.01182.x

Cited by 68 publications

(66 citation statements)

References 34 publications

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“…The lag phase prior to recruitment of Anabaena sp. 1 and A. lemmermannii has been observed in other akinete-forming species, for example Gloeotrichia echinulata (Barbiero 1993, Karlsson 2003, Karlsson-Elfgren et al 2004). The akinete must mature, germinate, and gas vesicles must form prior to recruitment (Wildman et al 1975).…”

Section: Discussionmentioning

confidence: 99%

“…These results are further supported by the similar studies on cyanobacterial species, including Microcystis spp. (Brunberg & Blomqvist 2003) and G. echinulata (Karlsson-Elfgren et al 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Asterionella formosa Hassall dominated the diatoms and Ceratium hirundinella (O. F. Müller) Schrank the dinoflagellates . Results on the cyanobacterium Gloeotrichia echinulata, which often dominates the late summer phytoplankton community in Lake Erken, have been reported in a separate paper (Karlsson-Elfgren et al 2004).…”

Section: Time Effectmentioning

confidence: 99%

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Factors regulating the recruitment of cyanobacterial and eukaryotic phytoplankton from littoral and profundal sediments

Rengefors¹,

Gustafsson²,

Ståhl-Delbanco³

2004

Aquat. Microb. Ecol.

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Many phytoplankton species produce resting cysts, forming 'seed banks' on lake sediments until they germinate and provide inocula (recruitment) for future pelagic populations. We have addressed the question of whether the littoral or the profundal zone provides the inoculum for planktonic populations in a eutrophic and dimictic lake (Lake Erken, Sweden). Our hypotheses were that high temperature, light, and sediment mixing would enhance recruitment. Also, we hypothesized that recruitment from littoral sediments would be greater than from profundal sediments. In situ recruitment traps were utilized to compare littoral and profundal recruitment, while laboratory experiments were performed to analyze which factors were most important. Seven common taxa were investigated: Asterionella formosa (Bacillariophyceae), Ceratium hirundinella (Dinophyceae), Microcystis botrys, M. wesenbergii, Anabaena sp., A. solitaria, and A. lemmermannii (Cyanobacteria). Our main findings were that light and sediment mixing were the most important factors in triggering and enhancing recruitment in the laboratory. Temperature and sediment origin (littoral/profundal) had a significant effect on recruitment only for A. lemmermannii and C. hirundinella, respectively. The field experiments showed that recruitment at the littoral site was much higher than at the profundal site, where little or no recruitment occurred. Together, these results strongly suggest that littoral sediments in temperate lakes provide inocula for most phytoplankton populations, likely due to favorable light conditions and high sediment mixing.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Factors regulating the recruitment of cyanobacterial and eukaryotic phytoplankton from littoral and profundal sediments

Rengefors¹,

Gustafsson²,

Ståhl-Delbanco³

2004

Aquat. Microb. Ecol.

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“…The ability to develop akinetes (spore-like cells) is a survival trait of the Nostocales that provides these toxic species with a competitive advantage over other phytoplankton. Akinetes differentiate from vegetative cells and provide a seed bank for rapid repopulation of the water column (Hori et al, 2003;Karlsson-Elfgren et al, 2004). These dormant cells survive harsh conditions in bottom sediments and dried-up shores of streams, pools and lakes.…”

Section: Introductionmentioning

confidence: 99%

Massive multiplication of genome and ribosomes in dormant cells (akinetes) of Aphanizomenon ovalisporum (Cyanobacteria)

et al. 2011

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Akinetes are dormancy cells commonly found among filamentous cyanobacteria, many of which are toxic and/or nuisance, bloom-forming species. Development of akinetes from vegetative cells is a process that involves morphological and biochemical modifications. Here, we applied a single-cell approach to quantify genome and ribosome content of akinetes and vegetative cells in Aphanizomenon ovalisporum (Cyanobacteria). Vegetative cells of A. ovalisporum were naturally polyploid and contained, on average, eight genome copies per cell. However, the chromosomal content of akinetes increased up to 450 copies, with an average value of 119 genome copies per akinete, 15-fold higher than that in vegetative cells. On the basis of fluorescence in situ hybridization, with a probe targeting 16S rRNA, and detection with confocal laser scanning microscopy, we conclude that ribosomes accumulated in akinetes to a higher level than that found in vegetative cells. We further present evidence that this massive accumulation of nucleic acids in akinetes is likely supported by phosphate supplied from inorganic polyphosphate bodies that were abundantly present in vegetative cells, but notably absent from akinetes. These results are interpreted in the context of cellular investments for proliferation following a long-term dormancy, as the high nucleic acid content would provide the basis for extended survival, rapid resumption of metabolic activity and cell division upon germination.

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“…But this may constrain the growth of non-nitrogenfixing cyanobacteria such as Microcystis, which is a slowgrowing species with high optimal temperature (Bastviken et al 1998). The high buoyancy rates of G. echinulata coupled with unique P uptake and its specific life strategy, which comprises both pelagic and benthic stages, result in a competitive advantage in Lake Erken as a result of the lake's high rates of light absorption and higher growth rates (Rodrigo et al 1998;Karlsson-Elfgren et al 2004). Alternatively, decreased sestonic C : P and N : P ratios may favor cyanobacteria, including Microcystis, in fall, when G. echinulata is deposited on the sediment in the form of resting cells (Karlsson-Elfgren et al 2004).…”

Section: Discussionmentioning

confidence: 99%

Effects of the zebra mussel, an exotic freshwater species, on seston stoichiometry

Naddafi

Pettersson

Eklöv

2008

Limnology & Oceanography

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We examined the effect of the zebra mussel, Dreissena polymorpha, an exotic species, on seston stoichiometry by conducting laboratory experiments in which we varied nutrient composition of seston and mussels over time. Zebra mussels altered the stoichiometry of seston through removal of particulate organic nutrients and changed the stoichiometry of the dissolved nutrient pool through nutrient excretion. Grazers had stronger effects on carbon : phosphorus (C : P) and nitrogen (N) : P ratios than on the C : N ratio of seston. Elemental residence time in tissue and high mass-specific nutrient excretion by small mussels caused small mussels to be more efficient nutrient recyclers than larger mussels. Zebra mussels reduced P availability through enhancing C : P and N : P molar ratios of seston during the period extending from June to August, when P was limited in the lake, and increased the C : N molar ratio of seston in June, when N was at the minimum level in the lake. C : P and N : P molar ratios for zebra mussel tissue were higher in August and somewhat in September than in all other months. N was retained more efficiently than P in Dreissena tissue. Nutrient mass-specific uptake rate was higher than excretion rate by zebra mussels.

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Factors regulating recruitment from the sediment to the water column in the bloom‐forming cyanobacterium Gloeotrichia echinulata

Cited by 68 publications

References 34 publications

Factors regulating the recruitment of cyanobacterial and eukaryotic phytoplankton from littoral and profundal sediments

Factors regulating the recruitment of cyanobacterial and eukaryotic phytoplankton from littoral and profundal sediments

Massive multiplication of genome and ribosomes in dormant cells (akinetes) of Aphanizomenon ovalisporum (Cyanobacteria)

Effects of the zebra mussel, an exotic freshwater species, on seston stoichiometry

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