Effects of grazing and light on the growth of<i>Nostoc pruniforme</i>(Cyanobacteria)

Dodds, Walter K.; Castenholz, Richard W.

doi:10.1080/00071618800650251

Cited by 31 publications

(23 citation statements)

References 16 publications

(16 reference statements)

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“…4-6 µm diam). Hormogonal packets, with terminal heterocytes, have been seen in Australian material (Entwisle 1862, Cherry 336, 337), and the gross form of thalli, as single or clustered 'bullets', is like that reported by overseas workers (Dodds & Castenholz 1988;Mollenhauer 1970;Mollenhauer et al 1999). The sheath around some trichomes close to the surface in some thalli is conspicuous, and rather more narrow than that in N. commune.…”

Section: L)supporting

confidence: 50%

“…These marble-like bodies are often encountered at the margins of lagoons or on the faces of waterfalls, but like the rubbery sheets of Nostoc commune, are not often deposited in herbaria. An association of this species and water snails, beneficial to the snails, demonstrated by Dodds and Castenholz (1988), has yet to be noted for Australian material.…”

Section: L)mentioning

confidence: 99%

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Non-marine algae of Australia:1. Survey of colonial gelatinous blue-green macroalgae (Cyanobacteria)

Skinner¹,

Entwisle²

2002

Telopea

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Section: L)supporting

confidence: 50%

Section: L)mentioning

confidence: 99%

Non-marine algae of Australia:1. Survey of colonial gelatinous blue-green macroalgae (Cyanobacteria)

Skinner¹,

Entwisle²

2002

Telopea

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“…Large gelatinous colonies of the closely related Nostoc pruniforme in a spring-fed pool at only 4.4uC also exhibited extremely low growth rates (average 1.8 3 10 23 d 21 ) and high longevity (Dodds and Castenholz 1988). There are other slow-growing macrophytes in the oligotrophic lakes, such as rooted isoetids in shallow water and mosses in deep water (Table 2), with common adaptations to the nutrient-poor environment (Farmer and Spence 1986).…”

Section: Discussionmentioning

confidence: 99%

“…The large size and spherical shape of Nostoc colonies are very unsuitable for the use of light, dissolved inorganic carbon (DIC), and nutrient ions from the surrounding water (Dodds and Castenholz 1988;Agusti et al 1994). Extensive self-shading, low photosynthetic rates, high proportion of dark respiration to photosynthesis, and high specific mass of the thick colonies (Sand-Jensen et al 2009b) suggest very low growth rates of N. zetterstedtii.…”

mentioning

confidence: 99%

Unprecedented slow growth and mortality of the rare colonial cyanobacterium, Nostoc zetterstedtii, in oligotrophic lakes

Sand‐Jensen

Møller

2011

Limnology & Oceanography

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Centimeter-large colonies of Nostoc zetterstedtii from a Swedish oligotrophic lake had the lowest growth and mortality rates of any studied temperate macrophyte. Annual growth rates at two shallow sites averaged 0.57-0.73 3 10 23 d 21 , corresponding to doubling times of colony dry weight in 2.6-3.3 yr. With such low growth rates, the largest colonies measuring 7 cm in diameter are 24-31 yr old. We found no mortality of incubated colonies and calculated the mortality rate to , 7.3 3 10 25 d 21 and the life span to . 24 yr in accordance with age of the largest colonies. The firm gelatinous tissue of high mass density, low nutrient content, and antibacterial property can account for the low growth and mortality rates. The measured daily surplus of photosynthesis minus respiration can support only small increments of the large mass per colony surface in accordance with the low growth rates. Growth and mortality rates of N. zetterstedtii correspond best with general allometric relationships for macroalgae using surface area to carbon biomass as the scaling parameter, but measurements are lower than predictions probably because of extra costs to sustain the substantial colony matrix. N. zetterstedtii is adapted to pristine Lobelia lakes with clear water and chronically low nutrient levels, but it is threatened by strong attenuation of light by brownification or eutrophication.

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“…Nostoc pruniforme C. Agardh ex Bornet & Flahault is a freshwater cyanobacterium forming macroscopic, spherical colonies that may reach >10 cm in diameter (Dodds & Castenholz 1988, Dodds et al 1995. The colonies are attached to the bottom substrata or lie loosely on the sediment in oligotrophic, low-alkaline lakes as well as in more eutrophic alkaline lakes (Dodds et al 1995).…”

Section: Introductionmentioning

confidence: 99%

Active accumulation of internal DIC pools reduces transport limitation in large colonies of Nostoc pruniforme

Raun

Borum²,

Sand‐Jensen³

2009

Aquat. Biol.

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Nostoc pruniforme is a freshwater cyanobacterium forming large spherical colonies of up to several centimeters in diameter. The size and shape result in low surface area to volume (SA/V) ratios that potentially put severe constraints on resource acquisition. In the present study we have specifically examined how N. pruniforme copes with the acquisition of dissolved inorganic carbon (DIC) for photosynthesis. The results showed that N. pruniforme elevates its functional SA/V considerably by locating the cyanobacterial trichomes primarily in the outer shell, while the inner mucus of polysaccharides contains declining densities of trichomes with increasing colony size. N. pruniforme is a very efficient bicarbonate (HCO 3 -) user and, in addition, actively accumulates large pools of DIC that can support net photosynthesis for > 22 h without a supply of external DIC. Both the efficient HCO 3 -utilization and the large internal DIC pools greatly reduce N. pruniforme dependence on the immediate availability and species of external DIC. The location of the trichomes in the shell, the HCO 3 -utilization and the internal DIC pools mean that colony size only has a minor effect on photosynthetic rates as a function of external DIC availability.

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Effects of grazing and light on the growth ofNostoc pruniforme(Cyanobacteria)

Cited by 31 publications

References 16 publications

Non-marine algae of Australia:1. Survey of colonial gelatinous blue-green macroalgae (Cyanobacteria)

Non-marine algae of Australia:1. Survey of colonial gelatinous blue-green macroalgae (Cyanobacteria)

Unprecedented slow growth and mortality of the rare colonial cyanobacterium, Nostoc zetterstedtii, in oligotrophic lakes

Active accumulation of internal DIC pools reduces transport limitation in large colonies of Nostoc pruniforme

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