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  • Best Management Practices (BMPs)  (1)
  • Eelgrass  (1)
  • Springer  (2)
  • American Chemical Society
  • 1995-1999  (2)
  • 1960-1964
Collection
Publisher
  • Springer  (2)
  • American Chemical Society
Years
  • 1995-1999  (2)
  • 1960-1964
Year
  • 1
    ISSN: 1432-1939
    Keywords: Eelgrass ; Grazing ; Productivity ; Limpets ; Trophic interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The unusual appearance of a commensal eelgrass limpet [Tectura depicta (Berry)] from southern California at high density (up to 10 shoot−1) has coincided with the catastrophic decline of a subtidal Zostera marina L. meadow in Monterey Bay, California. Some commensal limpets graze the chloroplast-rich epidermis of eelgrass leaves, but were not known to affect seagrass growth or productivity. We evaluated the effect on eelgrass productivity of grazing by limpets maintained at natural densities (8±2 shoot−1) in a natural light mesocosm for 45 days. Growth rates, carbon reserves, root proliferation and net photosynthesis of grazed plants were 50–80% below those of ungrazed plants, but biomass-specific respiration was unaffected. The daily period of irradiance-saturated photosynthesis (H sat) needed to maintain positive carbon balance in grazed plants approached 13.5 h, compared with 5–6 h for ungrazed plants. The amount of carbon allocated to roots of ungrazed plants was 800% higher than for grazed plants. By grazing the chlorophyll-rich epidermis, T. depicta induced carbon limitation in eelgrass growing in an other-wise light-replete environment. Continued northward movement of T. depicta, may have significant impacts on eelgrass production and population dynamics in the northeast Pacific, even thought this limpet consumes very little plant biomass. This interaction is a dramatic example of top-down control (grazing/predation) of eelgrass productivity and survival operating via a bottom-up mechanism (photosynthesis limitation).
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Water, air & soil pollution 90 (1996), S. 153-162 
    ISSN: 1573-2932
    Keywords: Best Management Practices (BMPs) ; Clean Water Act (CWA) ; discharge ; EPA ; general permit ; housekeeping ; National Pollutant Discharge Elimination System (NPDES) ; runoff ; sheet-flow ; source control ; storm water pollution prevention plan (SWPPP) ; treatment control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Contaminated storm water runoff has been identified as a significant source of degradation to our nation's waterways. Industrial and construction activities are primary sources of this contamination. After identifying this problem, Congress passed the Clean Water Act Amendments of 1987 which required EPA to publish regulations to control storm water discharges from certain activities. As a result, industrial facilities subject to the program are required to obtain permits and implement controls referred to as Best Management Practices (BMPs) to reduce the pollutants in the storm water runoff from their sites. BMPs can be implemented to reduce contaminants from entering storm water (source controls) or to treat storm water after it has contacted industrial areas (treatment controls). In general, source controls are more effective in reducing pollutant levels in storm water runoff, and are therefore, preferred by EPA and other regulatory agencies. This paper provides an overview of the EPA Storm Water Program which also applies to most state programs and discusses methods to identify and implement BMPs.
    Type of Medium: Electronic Resource
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