- 著者
-
今井 長兵衛
- 出版者
- Osaka Urban Living and Health Association
- 雑誌
- 生活衛生 (ISSN:05824176)
- 巻号頁・発行日
- vol.49, no.4, pp.199-214, 2005 (Released:2005-08-08)
- 参考文献数
- 43
- 被引用文献数
-
2
An alien species is defined as a species, subspecies or lower taxon occurring in a country or region outside that of its historically known range due to introduction by humans. Introduction can be either direct, as in the case of socio-economically valuable species that are imported, or indirect, as in the case of those that arrive accidentally together with imported goods and human immigrants. The term “invasive species” is given to alien species that, through predation, competitive substitution and gene contamination, adversely affect native biodiversity, the environment, agriculture, forestry, fisheries and human safety in the countries or regions to which they have newly immigrated. In Japan, the Invasive Alien Species Act was promulgated as of June 2, 2004, and went into force as of June 1, 2005. This article describes, first, factors affecting immigration, settlement and expansion of alien species, second, the present situation of recognized alien species in Japan and, third, countermeasures to be taken against alien species including invasive ones.