An experimental system to study ecophysiological responses of submerged macrophytes to temperature and light |
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Authors: | Hiroomi Imamoto Kenji Horiya Mitsuo Yamasaki Izumi Washitani |
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Institution: | (1) Water Resources Environment Technology Center, 1 Tsukasa, Gifu 500-8076, Japan;(2) Metocean Environment Inc., 3-2-23 Edobori, Nishi-ku, Osaka 224-0025, Japan;(3) Yamasaki Suisoen, Nishioji Hachijo Higashiiri Kitagawa, Shimogyo-ku, Kyoto 600-8854, Japan;(4) The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan |
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Abstract: | An experimental growth system was devised to study the ecophysiological responses of submerged macrophytes to temperature
and light. Using the system, a pilot study was conducted to compare responses to light of three representative species common
to the littoral zone of Lake Biwa: Vallisneria asiatica Miki var. biwaensis Miki, which is endemic to Japan, Potamogeton
maackianus A. Benn., a dominant submerged macrophyte in Lake Biwa, and Elodea nuttallii (Planch.) St. John, one of the most influential submerged exotic macrophytes naturalized in Japan. Different relative growth
rate responses and other growth parameters among the species were observed. We ascertained the experimental system to be useful
for the comparison of ecophysiological responses of submerged macrophytes. |
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Keywords: | Ecophysiological comparison Growth Lake Biwa Response to light Submerged macrophytes |
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