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  • 1
    Electronic Resource
    Electronic Resource
    The role of modelling in the control of toxic blue-green algae (1997)
    Springer
    Hydrobiologia 349 (1997), S. 1-4 
    Details
    ISSN: 1573-5117
    Keywords: toxic blue-green algae ; control ; management ; modelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Blooms and scums of blue-green algae (cyanobacteria)have occurred throughout the world for many years andare only one of many problems associated withover-enrichment by nutrients of fresh and marinewaters. Although much studied and written about,eutrophication poses complex and difficult managementproblems. The role of modelling as an aid to thecontrol of blue green algae is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003004406291
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  • 2
    Electronic Resource
    Electronic Resource
    Ploidy races in Actinidia chinensis (1994)
    Springer
    Euphytica 78 (1994), S. 175-183 
    Details
    ISSN: 1573-5060
    Keywords: Actinidia ; breeding ; chromosome numbers, cytogenetics, kiwifruit, ploidy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Ploidy levels were examined in 26 accessions of Actinidia chinensis: 20 accessions were diploid (2n=2x=58) and 6 accessions were tetraploid (2n=4x=116). There was no evidence of variation in ploidy level within an accession. Our results are consistent with tetraploid A. chinensis coming from a restricted part of China. Interploid crosses within A. chinensis produced only low numbers of seedlings which were mainly triploid. Crossing hexaploid A. deliciosa with pollen of tetraploid A. chinensis produced a large family of plants and those checked were pentaploid. Counts on 83 genotypes of different ploidy levels (2x, 3x, 4x, and 5x) confirmed that the basic chromosome number in Actinidia is 29.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027515
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  • 3
    Electronic Resource
    Electronic Resource
    Rutland water phytoplankton: the development of an asset or a nuisance? (1982)
    Springer
    Hydrobiologia 88 (1982), S. 117-133 
    Details
    ISSN: 1573-5117
    Keywords: phytoplankton ; reservoir ; succession ; abundance ; control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The development of a seasonal succession of phytoplankton species in Rutland Water is described. The factors controlling their succession and abundance are discussed in relation to changes in physical and chemical variables. At present, input of water from the catchment and by pumping from the Rivers Welland and Nene, has the greatest influence on phytoplankton abundance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00008304
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  • 4
    Electronic Resource
    Electronic Resource
    Numerically unreduced (2n) gametes and sexual polyploidization in Actinidia (1997)
    Springer
    Euphytica 96 (1997), S. 267-272 
    Details
    ISSN: 1573-5060
    Keywords: Actinidia ; kiwifruit ; 2n gametes ; sexual polyploidization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This is the first report on the production of numerically unreduced (2n) gametes in Actinidia species. Their occurrence was apparent from direct observations of microporogenesis in 2x, 3x, 4x and 6x plants and was inferred from ploidy analysis of progenies from 4x-2x and 2x-4x crosses. Both male and female plants were found to produce 2n gametes. 2n gamete producers were detected only in interploidy crosses. The observed frequency of 2n gametes was either similar to or towards the lower end of the ranges reported for other genera. The role of sexual polyploidization in the evolution of the genus is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003037920247
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