Phosphorus excretion by some zoobenthos in a eutrophic freshwater lake and its temperature dependency.
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The phosphorus excretion rate and its temperature dependency were investigated experimentally in four dominant species of zoobenthos in eutrophic freshwater lakes in Japan. The rates for the fourth instar larvae of <I>Chironomus plumosus</I>, <I>Tokunaga-yusurika akamusi</I> and <I>Chaoborus flavicans</I> and for <I>Limnodrilus</I> spp. were 1.44, 0.73, 5.82 and 0.49 ( 10 -1 gP Emgd Ew-1 Ed-1), respectively, at 15. The Q10 values of the excretion rate for <I>Chironomus plumosus</I>, <I>Chaoborus flavicans</I> and <I>Limnodrilus</I> spp. were 2.19, 1.66 and 2.00 below 30, respectively. The larvae of <I>T. akamusi</I> showed the lowest Q10 value of 1.20 below 15. Inorganic phosphorus accounted for more than 55% of the excreted total phosphorus for <I>C. plumosus</I> and 85% for <I>Limnodrilus</I> spp. The contribution of phosphate excretion by zoobenthos to the phosphate release from lake sediment was discussed.
- 日本陸水学会の論文
日本陸水学会 | 論文
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