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  • Articles  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Helgoland marine research 15 (1967), S. 480-488 
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary 1. Ecological studies of the kelp forests of Pacific North America have understandably stressed the larger vegetational components. An important vegetational component, previously neglected, is a taxonomically complex “turf” or parvosilvosa (Gislén 1930), composed of small algae and microscopic reproductive or developmental forms of larger algae. 2. This report considers the ecological importance of this smaller plant component within the framework of the overall vegetational structure. Both diving studies and the cultivation of experimental material in the laboratory under controlled conditions have been utilized to probe the questions involved. 3. Rocks and shells covered with representative algal turf have been cultured in the laboratory in naturally or artificially-illuminated tanks provided with a continuous supply of filtered seawater, and the resulting species composition has been compared with that occurring in nature. 4. Both luxuriant forms of previously collected material and new forms have been observed in these cultures. Certain of these algae grow extremely well in culture and in some cases continue to reproduce, generating successive crops of plants. Growth rates under laboratory conditions for a few species have been measured and approach what might be expected in the field. 5. Elective culture results suggest that many benthic algae may well exist for periods of time as “resting” or “resistant” stages, awaiting favorable environmental conditions. Stages such as those postulated have been produced in the laboratory. 6. Complete taxonomic or ecological surveys of subtidal areas, and particularly the deeper benthic regions near the lower limits of plant distribution would benefit from culture studies of the type described. Subtidal benthic algae also lend themselves readily to experimental manipulation, and the results obtained to date, although preliminary, suggest possible experimental approache to subtidal ecology.
    Notes: Kurzfassung Als „Parvosilvosa“ werden taxonomisch komplexe, rasenartige Pflanzenbestände bezeichnet, die aus kleinen Algen und mikroskopischen Entwicklungsstadien größerer Algen bestehen. Die vorliegende Untersuchung erörtert die ökologische Bedeutung dieser Pflanzenkomponente als Teil der örtlichen Gesamtflora; sie basiert auf Schwimmtauch-Studien und Laboratoriumsexperimenten. Mit „Parvosilvosa“ bedeckte Felsstücke und Molluskenschalen wurden unter Laboratoriumsbedingungen natürlichem und künstlichem Licht ausgesetzt. In den Kulturen konnten sowohl luxurierende Formen von bereits aus dem Biotop bekanntem Material als auch neue Formen festgestellt werden. Einige dieser Algen wuchsen sehr gut in Kultur und schritten zur sexuellen Fortpflanzung. Offenbar existieren viele benthonische Algen zeitweise in Form von Ruhestadien. Unter günstigen Bedingungen — wie sie beispielsweise in unseren Kulturen geboten werden — wachsen sie dann zu adulten Pflanzen heran. Die Erfassung des gesamten Algenbestandes eines Biotops dürfte durch die hier angewandten Methoden erleichtert werden. Die durchgeführten Untersuchungen ergeben neue Ansatzpunkte für experimentelle Arbeiten im Litoral.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 2023-10-30
    Description: 〈jats:p〉In many of the Pacific Islands, local communities have long-held cultural and spiritual attachments to the sea, in particular to species and specific marine areas, processes, habitats, islands, and natural seabed formations. Traditional knowledge, customary marine management approaches and integrated relationships between biodiversity, ecosystems and local communities promote conservation and ensure that marine benefits are reaped in a holistic, sustainable and equitable manner. However, the interaction between local traditional knowledge, contemporary scientific approaches to marine resource management and specific regulatory frameworks has often been challenging. To some extent, the value of community practices and customary law, which have provided an incentive for regional cooperation and coordination around ocean governance, is acknowledged in several legal systems in the Pacific and a number of regional and international instruments, but this important connection can be further enhanced. In this article we present a science-based overview of the marine habitats that would be affected by deep seabed mining (DSM) along with an analysis of some traditional dimensions and cultural/societal aspects of marine resource management. We then assess whether the applicable legal frameworks at different levels attach sufficient importance to these traditional dimensions and to the human and societal aspects of seabed (mineral) resource management in the region. On the basis of this analysis, we identify best practices and formulate recommendations with regard to the current regulatory frameworks and seabed resource management approaches. Indeed, the policies and practices developed in the Pacific could well serve as a suitable model elsewhere to reconcile commercial, ecological, cultural and social values within the context of deep sea mineral exploitation in addition to sustaining the Human Well-being and Sustainable Livelihoods (HWSL) of the Pacific communities and the health of the Global Ocean.〈/jats:p〉
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Format: application/pdf
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