Ecological Research

, Volume 8, Issue 2, pp 241–246

Respiration for maintenance and growth inReynoutria japonica ecotypes from different altitudes on Mt Fuji

  • Shigeru Mariko
  • Hiroshi Koizumi
Short Communication

DOI: 10.1007/BF02348537

Cite this article as:
Mariko, S. & Koizumi, H. Ecol. Res. (1993) 8: 241. doi:10.1007/BF02348537

Abstract

Respiration for maintenance and growth ofReynoutria japonica ecotypes from altitudes of 700 and 2420 m on Mt Fuji were measured in two controlled thermal conditions. The maintenance respiration of the high-altitude ecotype at both 15 and 25°C was significantly (1.7-fold) higher than that of the low-altitude ecotype, whereas growth respiration was independent of both ecotype and temperature. The temperature coefficient (Q10) of the maintenance respiration was about 1.9 in both ecotypes. The results show that there is ecotypic differentiation in the performance of maintenance respiration. It is suggested that the high maintenance respiration of the high-altitudeR. japonica ecotype is advantageous in severe upland environments but disadvantageous in a warm lowland climate in terms of carbon economy.

Key words

altitudinal variationmaintenance and growth respirationReynoutria japonica ecotypestemperaturewidespread species

Copyright information

© Ecological Society of Japan 1993

Authors and Affiliations

  • Shigeru Mariko
    • 1
  • Hiroshi Koizumi
    • 2
  1. 1.Global environment Research DivisionThe National Institute for Environmental StudiesTsukuba IbarakiJapan
  2. 2.Division of Plant EcologyNational Institute of Agro-Environmental SciencesTsukuba, IbarakiJapan