Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Growth and reproduction ofPorphyra columbina Mont. (Bangiales, Rhodophyceae) from southern New Zealand (1990)
    Springer
    Journal of applied phycology 2 (1990), S. 35-44 
    Details
    ISSN: 1573-5176
    Keywords: Porphyra columbina ; growth ; reproduction ; chemical composition ; seasonality ; Rhodophyceae ; New Zealand
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Changes in biomass and chemical composition, and the reproductive phenology ofPorphyra columbina Mont. were monitored at three sites in southern New Zealand over two growing seasons. Both temporal and spatial variations were found. Seasonal changes in biomass and chemical components were correlated with seawater nitrate concentrations and temperature. The summer decline in biomass was a result of the onset of unsuitable environmental conditions and the release of reproductive tissue. Under more suitable conditions, the decline in biomass was delayed. There was an inverse relationship between vegetative growth and reproduction. Reproductive plants first appeared in August at a time of increasing temperature, irradiance and daylength. Only larger plants which were mainly found in subsites low on the shore became reproductive. Plants sampled from high subsites had a shorter growth season, were generally smaller, had lower nitrogen and pigment content and were non-reproductive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02179767
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Alginate content and composition ofMacrocystis pyrifera from New Zealand (1992)
    Springer
    Journal of applied phycology 4 (1992), S. 357-369 
    Details
    ISSN: 1573-5176
    Keywords: Macrocystis pyrifera ; New Zealand ; seasonal changes ; intra plant variation ; alginate ; mannuronic acid ; guluronic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Tissue samples ofMacrocystis pyrifera from 2 sites in southern New Zealand and harvested over a period of 12 months were analysed for alginate content and composition (M:G ratio). Plants were divided into three frond classes of different length and each frond was further separated into age categories of blades and stipes (viz young, mature and old blades; mature and old stipes). Within each size class, younger blades had higher alginate content than older blades. Stipes did not show such variation with age. Alginate from younger blades and stipes had higher proportions of mannuronic acid residues than those from old blades and stipes. The range of M:G ratios for age categories of either blades or stipes from longer fronds was greater than those for smaller fronds. Alginate content and M:G ratios of stipes were always higher than for blades. The difference between M:G ratios of blades and stipes was greater for smaller fronds than for longer ones. Differences between collection sites and seasonal trends are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02185794
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...