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Root Production of Fagus crenata Blume Saplings Grown in Two Soils and Exposed to Elevated CO.sub.2 Concentration: an 11-Year Free-Air-CO.sub.2 Enrichment Experiment in Northern Japan

Water, air, and soil pollution, 2016-05, Vol.227 (6) [Peer Reviewed Journal]

COPYRIGHT 2016 Springer ;ISSN: 0049-6979 ;EISSN: 1573-2932 ;DOI: 10.1007/s11270-016-2884-1

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  • Title:
    Root Production of Fagus crenata Blume Saplings Grown in Two Soils and Exposed to Elevated CO.sub.2 Concentration: an 11-Year Free-Air-CO.sub.2 Enrichment Experiment in Northern Japan
  • Author: Agathokleous, Evgenios ; Watanabe, Makoto ; Eguchi, Norikazu ; Nakaji, Tatsuro ; Satoh, Fuyuki ; Koike, Takayoshi
  • Subjects: Forest soils
  • Is Part Of: Water, air, and soil pollution, 2016-05, Vol.227 (6)
  • Description: We examined the root production of a set of Fagus crenata (Siebold's beech) saplings grown in an infertile immature volcanic ash soil (VA) and another set in a fertile brown forest soil (BF) with both sets exposed to elevated CO.sub.2. After the saplings had been exposed to ambient (370-390 [mu]mol mol.sup.-1) or elevated (500 [mu]mol mol.sup.-1) CO.sub.2, during the daytime, for 11 growing seasons, the root systems were excavated. Elevated CO.sub.2 boosted the total root production of saplings grown in VA and abolished the negative effect of VA under ambient CO.sub.2, but there was no significant effect of elevated CO.sub.2 on saplings grown in BF. These results indicate the projected elevated CO.sub.2 concentrations may have a different impact in regions with different soil fertility while in regions with VA, a higher net primary production is expected. In addition, we observed large elevated CO.sub.2-induced fine-root production and extensive foraging strategy of saplings in both soils, a phenomenon that may partly (a) adjust the biogeochemical cycles of ecosystems, (b) form their response to global change, and (c) increase the size and/or biodiversity of soil fauna. We recommend that future researches consider testing a soil with a higher degree of infertility than the one we tested.
  • Publisher: Springer
  • Language: English
  • Identifier: ISSN: 0049-6979
    EISSN: 1573-2932
    DOI: 10.1007/s11270-016-2884-1
  • Source: ProQuest Central
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