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Journal of Integrative Agriculture  2018, Vol. 17 Issue (08): 1881-1887    DOI: 10.1016/S2095-3119(17)61831-8
Agro-ecosystem & Environment Advanced Online Publication | Current Issue | Archive | Adv Search |
Impacts of invasive Iris pseudacorus L. (yellow flag) establishing in an abandoned urban pond on native semi-wetland vegetation
Daisuke Hayasaka1*, Shingo Fujiwara1*, Taizo Uchida2 
1 Graduate School of Agriculture, KINDAI University, Nara 631-8505, Japan
2 Faculty of Engineering, Kyushu Sangyo University, Fukuoka 813-8503, Japan
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摘要  Received  3 July, 2017    Accepted  22 August, 2017

* These authors contributed equally to this study.

Iris pseudacorus L., intentionally introduced in Japan as an ornamental plant and to improve aquatic environments, has been declared a noxious species in the Invasive Alien Species Act of Japan due to the suspected high ecological risks to the local species and ecosystems.  Although prompt responses to I. pseudacorus have been sought to conserve local biodiversity, knowledge about its invasiveness is lacking.  Here, we report the relationship between the establishment of I. pseudacorus and floristic changes in semi-wetland vegetation of an abandoned urban pond (Aoike), Nara City, Nara Prepecture, Japan.  In total, 64 vascular plants were recorded in the pond, of which 50 were native species, seven were naturalized non-native, and seven were invasive species.  On the other hand, most of these vascular plants (42 species) were grassland species and only several aquatic plants (10 species) were found in this study pond.  The number of vascular plant species decreased significantly at quadrats with a coverage of I. pseudacorus above 50%.  In addition, tendencies of lower number of native species and concomitant higher number of invasive species were found with increasing coverage of I. pseudacorus.  From these results, we suggest that it is important to preferentially manage sites where the coverage of I. pseudacorus is above 50%, in order to preserve the local biodiversity.  Additionally, as recommended in the literature, it is essential that the cut reproductive organs are kept submerged under deep water for an effective control of I. pseudacorus
Keywords:  biodiversity conservation ')" href="#">  
Received: 03 July 2017   Accepted:
Corresponding Authors:  Correspondence Daisuke Hayasaka, Tel: +81-742-439084, Fax: +81-742-431593, E-mail:;   
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Daisuke Hayasaka
Shingo Fujiwara
Taizo Uchida

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Daisuke Hayasaka, Shingo Fujiwara, Taizo Uchida. 2018. Impacts of invasive Iris pseudacorus L. (yellow flag) establishing in an abandoned urban pond on native semi-wetland vegetation. Journal of Integrative Agriculture, 17(08): 1881-1887.

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