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  1. No Access

    Article

    Different population size change and migration histories created genetic diversity of three oaks in Tokai region, central Japan

    To understand genetic diversity in focal species, it is important to consider the possibility of speciation with gene flow, especially in species with porous genomes such as oaks. We studied genetic diversity ...

    Ichiro Tamaki, Tomohiro Obora, Takafumi Ohsawa… in Journal of Plant Research (2021)

  2. No Access

    Article

    Underuse/overuse and diversity of provisioning services and their change: the case of the Japanese national ecosystem service assessment (JBO2)

    The Japan Biodiversity Outlook 2 (JBO2) conducted an assessment of ecosystem services and how they have changed over the last 50 years in Japan using a combination of methods including literature review, calcu...

    Takafumi Ohsawa, Takahiro Okano, Fumiko Nakao, Kei Kabaya… in Sustainability Science (2019)

  3. No Access

    Article

    Quantifying effects of legal and non-legal designations of alien plant species on their control and profile

    Invasive alien species (IAS) pose serious threats to native ecosystems worldwide. In some regions, laws and/or lists related to alien species have been made, but their effects on actual measures against alien ...

    Takafumi Ohsawa, Takeshi Osawa in Biological Invasions (2014)

  4. No Access

    Article

    The genetic structure of Quercus crispula in northeastern Japan as revealed by nuclear simple sequence repeat loci

    Previous studies have reached different discussions about the genetic variation and genetic structure of Quercus crispula populations in northeastern Japan. This is a common oak species in Eastern Asia. Some stud...

    Takafumi Ohsawa, Yoshiaki Tsuda, Yoko Saito, Yuji Ide in Journal of Plant Research (2011)

  5. No Access

    Article

    Phylogeographic patterns of highland and lowland plant species in Japan

    As a result of ecological and historical factors, plant species occurring in mountainous regions often exhibit complex phylogeographical structure. The aim of this review is to identify the main phylogeographi...

    Takafumi Ohsawa, Yuji Ide in Alpine Botany (2011)

  6. No Access

    Article

    Landscape genetic structure of Betula maximowicziana in the Chichibu mountain range, central Japan

    We evaluated the genetic structure of 16 Betula maximowicziana populations in the Chichibu mountain range, central Japan, located within a 25-km radius; all but two populations were at altitudes of 1,100–1,400 m....

    Yoshiaki Tsuda, Haruo Sawada, Takafumi Ohsawa, Katsuhiro Nakao… in Tree Genetics & Genomes (2010)

  7. No Access

    Article

    Steep slopes promote downhill dispersal of Quercus crispula seeds and weaken the fine-scale genetic structure of seedling populations

    The seed dispersal patterns and genetic structure of plant populations in mountainous forests may differ from those on flat sites, because some seeds that fall from adults are likely to roll downhill, and thus...

    Takafumi Ohsawa, Yoshiaki Tsuda, Yoko Saito, Haruo Sawada… in Annals of Forest Science (2007)