| 要旨トップ | 目次 | 日本生態学会第59回全国大会 (2012年3月,大津) 講演要旨
ESJ59/EAFES5 Abstract


一般講演(口頭発表) B1-08 (Oral presentation)

Dynamics of species diversity in a Japanese warm-temperate secondary forest in Minamata

TOSHIHIRO YAMADA*(Hiroshima Univ.), SHIN-ICHIRO AIBA (Kagoshima Univ.), YASUHIRO KUBOTA (University of the Ryukyus), KUMIKO OKUBO (Shinshu Univ.), ITSUO MIYATA (Shimane Univ.), EIZI SUZUKI (Kagoshima Univ.), HISAYUKI MAENAKA (Osaka Prefecture University) AND MASAHIRO NAGANO

To examine the dynamics of species diversity during secondary succession, growth, death and recruitment of trees (diameter at breast height, dbh ≥ 4.5 cm) were monitored for 39 years (1966 to 2005) in two plots (P-1 and P-3, 40 m × 40 m each) in a Japanese warm-temperate secondary forest recovering from clearcutting that occurred in the 1910s. Typhoons in the early 1990s seriously damaged P-1 and moderately damaged P-3. During the 39 years, species diversity and evenness increased over time in both plots. We introduced new induces to separately examine effects of recruitment and mortality on species diversity and found that recruitment always contributed to increases in species diversity but mortality did not. Recruitment increased species diversity because the recruitment rate of rare species was higher than that of abundant species. This reflected delayed recruitment of late successional species before the typhoons and the mass recruitment of early successional species after the typhoons. Through these processes, the typhoons enhanced species diversity in this Japanese warm-temperate forest.


日本生態学会