Nitrogen uptake and growth of the germlings and mature thalli of Fucus distichus

Thomas, Terry E.; Harrison, Paul J.; Taylor, E. B.

doi:10.1007/bf00392496

Cited by 39 publications

(23 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Harrison et al, 1986;Lavery & McComb, 1991;Ahn et al, 1998), in general, the range of nitrate concentrations used in determining kinetic constants for nitrate uptake by macroalgae are not high enough to establish the presence of a LATS. Ammonium inhibits nitrate uptake by 50% in Enteromorpha intestinalis (Thomas & Harrison, 1987), Hypnea musciformis (Haines & Wheeler, 1978) and high-intertidal Gracilaria pacifica (Thomas & Harrison, 1987) and 30% in mature Fucus distichus (Thomas et al, 1985). Ammonium concentrations greater than 5 lM decrease the rate of nitrate uptake in Gracilaria foliifera (D'Elia & DeBoer, 1978) and in Codium fragile subsp.…”

Section: Discussionmentioning

confidence: 96%

“…whether ammonium inhibits nitrate uptake) in macroalgae has been studied extensively (D'Elia & DeBoer, 1978;Haines & Wheeler, 1978;Hanisak & Harlin, 1978;Harlin & Craigie, 1978;Topinka, 1978;Thomas et al, 1985;Harrison et al, 1986;Thomas & Harrison, 1987;Brenchley et al, 1997;Ahn et al, 1998). However, much less is known about the long-term relationship between ammonium and nitrate uptake (i.e.…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Kinetics of nitrate uptake by New Zealand marine macroalgae and evidence for two nitrate transporters in Ulva intestinalis L.

et al. 2007

View full text Add to dashboard Cite

Kinetic constants were determined for nitrate uptake in three species, Pterocladiella capillacea (S.G. Gmelin) Santelices et Hommersand (Rhodophyceae, Gelidiales), Ulva intestinalis L. (Chlorophyceae, Ulvales) and Xiphophora chondrophylla (Turner) Montagne ex Harvey (Phaeophyceae, Fucales), of New Zealand macroalgae, with K m values ranging from 10 to 17 lM and V max values from 3 to 65 lmole g -1 dry weight h -1 . There was no effect of ammonium on nitrate uptake by Pterocladiella capillacea or Xiphophora chondrophylla. Ammonium inhibited nitrate uptake by 40% in Ulva intestinalis from a site with relatively low seawater ammonium concentrations. In contrast, U. intestinalis from an ammonium-enriched site had lower rates of nitrate uptake that were insensitive to inhibition by ammonium. It is suggested that there are (at least) two transport systems for nitrate in U. intestinalis; a constitutive transporter, which is insensitive to ammonium, and a transporter that is sensitive to ammonium inhibition and downregulation by ammonium; the implications of this for our understanding of macroalgal blooms is discussed.

show abstract

Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 97%

Kinetics of nitrate uptake by New Zealand marine macroalgae and evidence for two nitrate transporters in Ulva intestinalis L.

et al. 2007

View full text Add to dashboard Cite

show abstract

“…To our knowledge, it has not been tested whether excessive nutrient uptake occurs in Fucus vesiculosus germlings, but germlings of Fucus distichus are known to maintain constant nitrate uptake for substantially longer and with a higher rate than mature thalli (Thomas et al, 1985). A capability to sustain nutrient uptake and storage under occasional nutrient elevation would be an advantageous competitive strategy for species that have evolved in naturally nutrient-poor waters with a pulsed supply of nutrients (cf.…”

Section: Discussionmentioning

confidence: 99%

Negative direct effects of nutrient enrichment on the establishment ofFucus vesiculosusin the Baltic Sea

Bergström

Berger²,

Kautsky

2003

European Journal of Phycology

View full text Add to dashboard Cite

The direct effect of nutrient enrichment on the early life stages of Fucus vesiculosus in the brackish Baltic Sea was followed in laboratory experiments. The effects of nitrate and phosphate on the rate of attachment, on germination and on the development of the primary rhizoid were assessed. The rate of attachment was slow compared with similar studies in a marine environment. The zygotes of the control reached only 9% attachment within the first 12 h. A significant negative effect of nitrate enrichment on the attachment rate and germination was observed. Germling survival was reduced by over 20% in moderate nitrate enrichment, and by over 50% in high nitrate (21 JlM) and high phosphate (1.0 JlM) enrichment dUring the first 10 days. The effect on the development of the primary rhizoid was also significant, but less severe. The results suggest that eutrophication may have a direct negative effect on the recruitment of Fucus vesiculosus, unrelated to the secondary effects normally attributed to the decline of Fucus in the Baltic Sea.

show abstract

“…Examples from multiple-flask experiments include Fucus distichus (Thomas et al 1985), F. spiralis (Topinka 1978), and Ulva lactuca (Pedersen 1994). These algae have SA:V ratios of 30, 34 and 400 cm2:1 cm3 (Hein et al 1995), respectively.…”

Section: Discussionmentioning

confidence: 99%

Scaling of ammonium uptake by seaweeds to surface area:volume ratio:geographical variation and the role of uptake by passive diffusion

Taylor¹,

Peek²,

Rees³

1998

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Rates of ammonium uptake per g dry weight for seaweeds from the Mokohinau Islands, northeastern New Zealand were much lower than published values for northern hemisphere (east coast of North America and Baltic Sea) seaweeds. For the New Zealand seaweeds, the rate of ammonium uptake expressed per cm2 surface area was relatively constant (23.9 + 3.4 nmol cm-l h-'), irrespective of seaweed surface area:volume (SA:V) rat~o. Moreover, there was a linear relationship between rates of ammonium uptake per g dry weight and ammonium concentration for 2 of the species used, Xiphophora chondrophylla and Ulva sp , which had low and high SA:V ratios, respectively. These results are consistent wlth most or all of ammonium uptake being due to passive diffus~on of NH,. In addition, of 3 other species investigated, Pterocladia capillacea, Porphyra sp. and Enteronlorpha sp., only P capillacea exhibited saturation kinetics.

show abstract

Nitrogen uptake and growth of the germlings and mature thalli of Fucus distichus

Cited by 39 publications

References 33 publications

Kinetics of nitrate uptake by New Zealand marine macroalgae and evidence for two nitrate transporters in Ulva intestinalis L.

Kinetics of nitrate uptake by New Zealand marine macroalgae and evidence for two nitrate transporters in Ulva intestinalis L.

Negative direct effects of nutrient enrichment on the establishment ofFucus vesiculosusin the Baltic Sea

Scaling of ammonium uptake by seaweeds to surface area:volume ratio:geographical variation and the role of uptake by passive diffusion

Contact Info

Product

Resources

About