GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
Document type
Publisher
Years
  • 1
    ISSN: 1432-1009
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Helgoland marine research 24 (1973), S. 455-464 
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary 1. The Los Angeles-Long Beach, California, Harbor underwent its first major development early in the twentieth century. It is now the third largest port in the United States, a focal point for seven million southern California residents. 2. Pressures for pollution abatement and for development of a deeper water port make an integrated research program necessary. 3. Allan Hancock Foundation personnel have undertaken a comprehensive study with support from the federal Sea Grant Program, private industry and local harbor departments. 4. Plankton-productivity, marine and public health microbiology, midwater settling rack fauna, benthic fauna, water quality parameters, circulation patterns, and sediment content have been sampled. 5. Sequence of red tide and other phytoplankton blooms have been postulated and predicted. 6. Plankton-settling volumes have been good indicators of short-term stress or pollution. 7. Settling racks suspended monthly have shown a much greater diversity of species and higher categories present in the water column than are present in polluted bottom muds. 8. Some 60 species of 30 polychaete families were taken in bottom samples throughout the harbor. 9. Settling rack sampling measures relatively short-term stress and benthic sampling is a good indicator of longer-term stress.
    Notes: Extrait Les eaux du port de Long-Beach-Los Angeles, dans la baie de San Pedro en Californie, ont été relativement peu étudieés par rapport á celles des autres grands ports urbains dans le monde. L'urgente necessité de réduire la pollution et les besoins opposeés de developpement industriel ont été á l'origine de l'établissement d'un projetpilote de surveillance et de recherches, par la récolte d'echantillons en bateau et in situ et par des études de laboratoire. Les paramètres suivants ont été étudiés: courbes de température, de salinité, de pH, de turbidité; analyse quantitative des métaux rares, (oligo-éléments), des métaux lourds et des matières organiques; mesures de productivité par les méthodes d'assimilation du carbone-14 et par la spectrophotométrie des pigments; des échantillons benthiques, récoltés avec la drague de Campbell et tamisés, ont été identifiés au niveau de l'espèce. Les oeufs, larves, et petits organismes planctoniques qui ne pourraient survivre sur les sédiments pollués ont été récoltés au moyen de cadres-porte-lames suspendus et protégés par un tamis. Le recensement de espèces des poissons et l'éxamen de leur état physiologiques est en cours. L'inventaire des bactéries a été effectué dans les eaux avoisinant le dégorgement des déchets industriels et des égouts, en relation avec les recrudescences périodiques de la reproduction du phytoplancton. L'étude bactériologique des microorganismes de la «marée rouge» et l'étude des effets de chocs thermiques ont été entreprises. Les résultats montrent que la méthode des cadres «porte-lames» apporte sur la nature et la répartition de la faune des informations que ne procurent pas les récoltes en bateau. Les mesures de plancton se sont avéreés les meilleurs indicateurs des effets nocifs á court terme, tandis que les échantillonnages benthiques rendent mieux compte des effets à long terme.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Los Angeles-Long Beach Harbors were a grossly polluted body of water at the time of the initiation of benthic biological studies in 1951. Industrial, domestic and storm wastes were emptied into these waters with little or no treatment. The inner harbor waters contained little or no dissolved oxygen and much of the benthos was azoic or possessed a stressed community. However, the outer harbor water mass contained adequate dissolved oxygen, and the benthos supported a rich fauna dominated by many species of polychaetes. A pollution abatement program was initiated in 1968, and today many former wastes have been eliminated or are being diverted to treatment plants for processing. The benthic fauna changed markedly and rapidly following this environmental clean-up. Peaks in population were reached throughout the harbor in 1973–1974 which was followed by a slight decline then stability. An oil tanker explosion, pre-treatment of fish-cannery wastes then diversion of these wastes to a sewage treatment plant, and a change from primary to secondary treatment of sewage brought about changes in the benthic fauna. In the latter instance, benthic population of polychaetes, fish populations and the number of birds feeding within the area decreased significantly.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...