論文

査読有り
2016年1月

Contrasting traits, contrasting environments, and considerations on population dynamics under a changing climate: an ecophysiological field study of two co-dominant tree species

PLANT SPECIES BIOLOGY
  • Edgard A. Bontempo e Silva
  • ,
  • Kiyomi Ono
  • ,
  • Akihiro Sumida
  • ,
  • Shigeru Uemura
  • ,
  • Toshihiko Hara

31
1
開始ページ
38
終了ページ
49
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1111/1442-1984.12074
出版者・発行元
WILEY-BLACKWELL

The increase in light availability resulting from canopy changes or opening is not always beneficial and can inhibit photosynthesis of tree seedlings already under other environmental stress. Tree seedlings' responses to compounded abiotic stress depend on their life-history traits, and understanding the variations of such responses is important for understanding population dynamics under a changing climate. In this study we investigate how the photosynthesis of juveniles of two canopy tree species with different life-history traits, Abies sachalinensis and Betula ermanii, differs in two contrasting sites at a sub-boreal forest in northern Japanone under a deciduous canopy (Closed site) and the other at a wide canopy opening (Open site). Seedlings at the Open site had low F-v/F-m (quantum yield of photosystem II) for a longer period than those at the Closed site. Abies sachalinensis at the Closed site showed lower F-v/F-m in spring than those at the Open site, but recovered after the canopy's new leaves flushed, indicating its acclimation to the shaded condition. Mean P-max (light-saturated photosynthetic rate at ambient CO2 levels) of A.sachalinensis seedlings was affected by site and air temperature, while B.ermanii seedlings were also affected by precipitation. Only B.ermanii's seedlings presented growth in the period studied, in spite of observed mid-day drops to F-v/F-m attributed to water-deficit-related photoprotection. Results suggest that the climate change predicted for the Hokkaido area may increase the competitive advantage of broad-leaved deciduous species, such as B.ermanii, in relation to evergreen conifers like A.sachalinensis.

リンク情報
DOI
https://doi.org/10.1111/1442-1984.12074
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000368069400005&DestApp=WOS_CPL
ID情報
  • DOI : 10.1111/1442-1984.12074
  • ISSN : 0913-557X
  • eISSN : 1442-1984
  • Web of Science ID : WOS:000368069400005

エクスポート
BibTeX RIS