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  • 1
    Electronic Resource
    Electronic Resource
    Palynological evidence for Miocene climatic cooling in eastern Iceland about 9.8 Myr ago (1983)
    [s.l.] : Nature Publishing Group
    Nature 303 (1983), S. 689-692 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The stratigraphical setting for our studies is the Tertiary lava pile in Iceland which contains plant-bearing clastic beds on either side of the present active volcanic zone9. The Tertiary flora is best known from clastic beds in western Iceland, from which a history of climatic cooling from late ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/303689a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Freshwater chlorophycean algae in recent marine sediments of the Beaufort, Laptev and Kara Seas (Arctic Ocean) as indicators of river runoff (2000)
    Springer
    International journal of earth sciences 89 (2000), S. 470-485 
    Details
    ISSN: 1437-3262
    Keywords: Arctic Ocean Beaufort Sea Laptev Sea Kara Sea Recent sediments Chlorophyte distribution Freshwater discharge
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract. Freshwater chlorophycean algae are characteristic organic-walled microfossils in recent coastal and shelf sediments from the Beaufort, Laptev and Kara seas (Arctic Ocean). The persistent occurrence of the chlorophycean algae Pediastrum spp. and Botryococcus cf. braunii in marine palynomorph assemblages is related to the discharge of freshwater and suspended matter from the large Siberian and North American rivers into the Arctic shelf seas. The distribution patterns of these algae in the marine environments reflect the predominant deposition of riverine sediments and organic matter along the salinity gradient from the outer estuaries and prodeltas to the shelf break. Sedimentary processes overprint the primary distribution of these algae. Resuspension of sediments by waves and bottom currents may transport sediments in the bottom nepheloid layer along the submarine channels to the shelf break. Bottom sediments and microfossils may be incorporated into sea ice during freeze-up in autumn and winter leading to an export from the shelves into the deep sea. The presence of these freshwater algae in sea-ice and bottom sediments in the central Arctic Ocean confirm that transport in sea ice is an important process which leads to a redistribution of shallow water microfossils.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s005310000127
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    Paper (German National Licenses)
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  • 3
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    The natural resources of San Dieguito and Batiquitos Lagoons (2021)
    California Department of Fish and Game | Sacramento, CA
    In:  http://aquaticcommons.org/id/eprint/547 | 8 | 2020-08-24 03:49:52 | 547 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-30
    Description: The California Department of Fish and Game has played a central role in attempting to protect and enhance the remaining 25% of southern California wetlands which have survived the ingress of urbanization and commercialdevelopment since 1900 (U.S. Dept. Interior, 1972). To this end, the Department has published a series of reports documenting California's coastal wetlands resources, including four covering wetlands in southern California (Upper Newport Bay, Frey et al., 1970; Goleta Slough, Spethet al., 1970; Los Penasquitos Lagoon, Mudie et al., 1974; and San Diego Bay, Browning et al., 1973). The following report is an extension of that effort. (131pp.)
    Keywords: Conservation ; Pollution ; Biology ; Environment ; San Dieguito Lagoon ; Batiquitos Lagoon ; California ; Natural resources ; conservation ; pollution
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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  • 4
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    The natural resources of Los Penasquitos Lagoon (2021)
    California Department of Fish and Game | Sacramento, CA
    In:  http://aquaticcommons.org/id/eprint/548 | 8 | 2020-08-24 03:50:08 | 548 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-30
    Description: The purpose of this report is to document the natural resources of Los Penasquitos Lagoon, San Diego County; to outline and evaluate proposed developments affecting those resources; and to recommend measures that will protect and enhance the lagoon and its environs.The necessity for a report of this nature has become apparent with the progressive destruction of California's coastal wetlands over the past fifty years. These wetland resources, which are virtually irreplaceable, are essential to the continued existence of many forms of resident fish and wildlife and to the preservation of migratory shorebirds and waterfowl. Approximately 60 percent of the tidal wetlands in California has already been destroyed (Speth, 1970); and, it is estimated that only 10 percent isleft of the original acreage of coastal marshland in San Diego County. The future of the remaining wetland habitats continues to be threatened. There is an urgent need, therefore, for sound planning to protect these wetlands and to prevent their otherwise inevitable disappearance as a valuable natural resource. (100pp.)
    Keywords: Conservation ; Pollution ; Biology ; Environment ; Los Penasquitos Lagoon ; California ; Conservation ; Pollution ; natural resources
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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