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Article

Dragonfly crisis in Japan: A likely consequence of recent agricultural habitat degradation

Taku Kadoya, Auteur ; Shin-ichi Suda, Auteur ; Izumi Washitani, Auteur

Dans Biological Conservation (142(9) SEP 2009)

Many Japanese dragonfly species depend on habitat complexes maintained in rice paddy systems. We postulated that recent alterations to habitat complexes in paddy systems have had adverse effects on dragonfly populations, especially those 'once c[...]

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Article

Habitat and flower resource partitioning by an exotic and three native bumble bees in central Hokkaido, Japan

Hiroshi S. Ishii, Auteur ; Taku Kadoya, Auteur ; Reina Kikuchi, Auteur ; Shin-ichi Suda, Auteur ; Izumi Washitani, Auteur

Dans Biological Conservation (141(10) OCT 2008)

Studies of the interspecific relationships between alien and native pollinator species can help forecast the success of alien species as well as assess the extent of disturbance to native plant-pollinator interactions. We examined the habitat an[...]

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Article

Influence of connectivity, habitat quality and invasive species on egg and larval distributions and local abundance of crucian carp in Japanese agricultural landscapes

Shin-ichiro S. Matsuzaki, Auteur ; Akira Terui, Auteur ; Kohji Kodama, Auteur ; Masamitsu Tada, Auteur ; Takehito Yoshida, Auteur ; Izumi Washitani, Auteur

Dans Biological Conservation (144(8) AUG 2011)

The quality of habitat at and around a spawning site, and the availability of movement between spawning and nonspawning habitats are likely to be important determinants for population persistence in a degraded and fragmented landscape. We assess[...]

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Article

Predicting the rate of range expansion of an invasive alien bumblebee (Bombus terrestris) using a stochastic spatio-temporal model

Taku Kadoya, Auteur ; Izumi Washitani, Auteur

Dans Biological Conservation (143(5) MAY 2010)

To develop effective strategies for managing biological invasions, it is important to understand and be able to predict patterns of invasion and range expansion, and particularly the rate of spread and factors controlling this rate. To predict t[...]

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Article

Toward the restoration of a sustainable population of a threatened aquatic plant, Nymphoides peltata: Integrated genetic/demographic studies and practices

Jun Nishihiro, Auteur ; Ryuji Uesugi, Auteur ; Shinichi Takagawa, Auteur ; Izumi Washitani, Auteur

Dans Biological Conservation (142(9) SEP 2009)

We provide a brief review of practices and relevant studies for restoration of Nymphoides peltata (yellow floating heart, Asaza), a distylous floating-leaf clonal plant, in Lake Kasumigaura, Japan to develop a model of integrated genetic and dem[...]

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Article

Using monitoring data gathered by volunteers to predict the potential distribution of the invasive alien bumblebee Bombus terrestris

Taku Kadoya, Auteur ; Hiroshi S. Ishii, Auteur ; Reina Kikuchi, Auteur ; Shin-ichi Suda, Auteur ; Izumi Washitani, Auteur

Dans Biological Conservation (142(5) MAY 2009)

We explored the use of ecological niche-modeling from data compiled in a participatory program of thousands of volunteer observers to quantitatively evaluate the spatial risk of invasion by the alien species Bombus terrestris. B. terrestris has [...]

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