底付近の境界層が付着藻類の生長に及ぼす影響についての実験的研究  [in Japanese] Effects of Boundary Layer near the Substratum on the Periphyton Growth : an Experimental Study  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

Sufficient nutrient supply is one of the key factors for the periphyton growth. The formation of the viscous sublayer near the substratum, however, extremely hampers the nutrient transport through the layer with its low diffusivity. Under two different velocities in a laboratory flume, the transition of Periphyton biomass and species were measured, together with light and nutrient conditions. A higher amount of biomass, mostly <i>Navicula</i> in both currents, occurred in the fast current than in the slow current, although nutrient concentrations in an upper layer and light conditions were almost the same. The estimation of the nutrient diffusion rate indicates that the absorbed amount by the periphyton mat is almost equal to the quantity transported by diffusion. Thus, with its higher diffusion rate, the higher biomass of periphyton occurred in the fast current. This result implies that, under the nutrient limited condition, the periphyton growth may be regulated by the nutrient diffusion rate in the viscous sublayer rather than the absolute concentration in the upper layer.

Journal

  • Journal of Japan Society on Water Environment

    Journal of Japan Society on Water Environment 24(6), 376-381, 2001-06-10

    Japan Society on Water Environment

References:  21

Codes

  • NII Article ID (NAID)
    10008005062
  • NII NACSIS-CAT ID (NCID)
    AN10372439
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    09168958
  • NDL Article ID
    5806974
  • NDL Source Classification
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL Call No.
    Z16-1045
  • Data Source
    CJP  NDL  J-STAGE 
Page Top