Effect of Free-Air CO2Enrichment (FACE) on the Community Structure of Aquatic Organisms in Floodwater of a Japanese Paddy Field during the Flooding Period of Rice Cultivation

Autor: Kazuhiko Kobayashi, Masatsugu Yamazaki, Masumi Okada, Makoto Kimura
Rok vydání: 2005
Předmět:
Zdroj: Soil Science and Plant Nutrition. 51:271-279
ISSN: 1747-0765
0038-0768
DOI: 10.1111/j.1747-0765.2005.tb00031.x
Popis: In the present study, the effect of free-air CO2 enrichment (FACE) on the diversity and the community structure of aquatic organisms in the floodwater of a paddy field in northern Japan was evaluated. The varieties and the number of aquatic organisms ranging from 30 μm to 2 cm were compared four times at intervals of 20 d between the FACE (599 ppm CO2) and ambient air (384 ppm CO2) plots during the flooding period of rice cultivation. Aquatic organisms were classified mainly at the order level. Twenty-eight taxonomical groups were detected, and the number of groups in the FACE plots was significantly lower than that in the ambient plots. Zygnematales and Chaetonotida were less frequently detected in the FACE plots. The population densities of Zygnematales, and Chaetonotida also tended to be lower in the FACE plots than in the ambient plots in the late flooding period (after 50 d of flooding). No groups showed a significantly higher population density and frequency of presence in the FACE plots than in the...
Databáze: OpenAIRE
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