NDLI: Identification of conservation measures to protect the Japanese endangered plant species Aster kantoensis

Content Provider	Springer Nature Link
Author	Iue, Ken Kuramoto, boru Maki, Masayuki Masuda, Michiko Washitani, Izumi
Copyright Year	1998
Abstract	To identify the factors responsible for degrading the habitat of the endangered plant species Aster kantoensis, as well as the vulnerable life stage where this occurs, we carried out sowing experiments. Two natural habitats were simulated, being situated along the floodplains of the Tama River in central Japan. Seeds collected from a natural habitat were sown in two apparently suitable locations (Tomoda and Ishida sites). Germination, survival, growth, and seed production were subsequently monitored from 1993 through to 1997. The Tomoda site was a gravel bar in floodplains formed by flooding in 1991, while the Ishida site (two plots) was one gravel bar where several plants were growing sparsely and another where a population had become extinct in 1992. Seed cohorts completed their life cycle within 3 years at the Ishida site and within 5 years at the Tomoda site. Monitored parameters at Ishida were substantially lower than those at Tomoda. In addition, estimates of population growth indicated an increase at Tomoda and a rapid decrease at Ishida. However, degradation of habitats seemed to occur at Tomoda over the monitored periods. In view of our results, we conclude that natural germination of about 0.13% is needed for increasing population size. The major factors for decreasing population size are believed to be the lack of safe sites for germination and seedling establishment in old habitats (>10years). Conservation measures are suggested based on these findings.
Starting Page	141
Ending Page	149
Page Count	9
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	13
Issue Number	2
e-ISSN	14401703
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-01-01
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aster kantoensis endangered species floodplains population dynamics safe sites Behavioural Sciences Ecology Evolutionary Biology Forestry Plant Sciences Zoology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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