Yoshiaki Tsuda

Nationwide Environmental DNA Haplotyping Illuminates the Range Expansion of Three Invasive Black Bass Species in Japan

Kei Wakimura, Shin‐ichiro S. Matsuzaki, Satoshi Kitano, Yoshiaki Tsuda et autres

ABSTRACT Invasive species pose a significant threat to ecosystems worldwide. To support effective management, it is crucial to clarify their distribution ranges and dispersal processes. Here, we applied an environmental DNA (eDNA)‐based mitochondrial DNA haplotyping approach to invasive black bass species to …

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Local Genetic Diversity and Structure of Asian Black Bear, Ursus thibetanus, Populations in Nagano, Japan

Ririko Koido, Masayuki Yagyu, 明日香 宮澤, Naoki Ohnishi et autres

長野県に生息するツキノワグマ Ursus thibetanus集団の地域的な遺伝的多様性と遺伝構造．人間とツキノワグマとの軋轢は，日本社会の大きな問題となっている．ツキノワグマの遺伝的多様性，集団構造，地域集団サイズの理解は，本種の生態学的知見の向上や保護管理策の指標を示すうえで不可欠である．本研究では，長野県木曽地域にて採取された体毛由来の DNA を用いて，性判別を行うとともに，ミトコンドリア DNA 多型および核 DNA のマイクロサテライト 12 遺伝子座の遺伝解析を行った．核マイクロサテライトの遺伝子型から，約 48 km2 の調査範囲内において 30 個体（雄 6，雌 18）を識別した．ミトコンドリア DNA の解析の結果，雄の全個体はハプロタイプ E01 のみを示したが，雌は E07 を含む 3 つのハプロタイプを保有しており，E07 はこれまで東北地方や富山県では報告されていたが，長野県では初検出であった．STRUCTURE 解析は明瞭な核 DNA の遺伝的クラスターを検出しなかったが，ミトコンドリア・核 DNA の両方で有意な空間遺伝構造が検出された．また，近年のボトルネックの証拠は認められなかった．本研究は，長野県におけるツキノワグマの地域的遺伝構造を初めて明らかにしたものである．遺伝的クラスターは検出されなかったが，推定された有効集団サイズは大きくなかったことから，今後の継続的な遺伝モニタリングの必要性が示唆された．これら本研究成果は，木曽地域において，人間とツキノワグマとの軋轢が起こりえる地域の予想やツキノワグマの保護管理指標の指針づくりに新たな知見を提供する．

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長野県に生息するツキノワグマ Ursus thibetanus集団の地域的な遺伝的多様性と遺伝構造

Ririko Koido, Masayuki Yagyu, 明日香 宮澤, Naoki Ohnishi et autres

Human–bear conflict is a significant issue in Japan. Understanding genetic diversity, population structure, and local population size of the Asian black bear is essential for improving ecological knowledge and developing conservation and management measures of this species. We examined sex, mitochondrial (mt) …

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Data from: Local genetic diversity and structure of Asian black bear, Ursus thibetanus, populations in Nagano, Japan

Ririko Koido, Masayuki Yagyu, 明日香 宮澤, Naoki Ohnishi et autres

Human–bear conflict is a significant and pressing social issue in Japan. Understanding genetic diversity, population structure, and local population size of the Asian black bear (Ursus thibetanus) is crucial not only for improving ecological and genetic knowledge of the species but also …

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Decrease in Effective Population Size After the Immigration of Asian Black Bears to Japan

Naoki Ohnishi, Valentin Yu Guskov, Shuri Kato, Ririko Koido et autres

ABSTRACT The genetic structure and demographic history of the Asian black bear ( Ursus thibetanus ) in Japan were investigated using Double digest restriction‐site associated DNA sequencing (ddRADseq). Analysis of 83 individuals revealed seven regional populations with clear geographic structure. Bayesian clustering …

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ITS phylogeny reveals a wide host range and a high genetic diversity of endophytic Phyllosticta capitalensis in Indonesia

Indriati Ramadhani, Yoshiaki Tsuda, H Yamanobe, Kaoru Yamaguchi et autres

Phyllosticta capitalensis is a cosmopolitan endophytic fungus with a wide host range. We hypothesize that endophytic P. capitalensis originates in tropical regions, which have higher host plant diversity than subtropical and temperate regions. We tested this hypothesis by examining the host range …

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Data from: Direct integration of population genetics and dynamic species distribution modelling improves predictions of post-glacial history of Piper nigrum

Sandeep Sen, Michael Peter Nobis, Rani M.S. Saggere, Srirama Ramanujam et autres

Climate change strongly influences species distributions and population genetic structure, but independent analyses of these factors often yield uncertain conclusions. To address this, we developed an integrative framework combining population genetics and dynamic species distribution modelling (DSDM) to reconstruct the post-glacial history …

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Author response for "Direct Integration of Population Genetics and Dynamic Species Distribution Modelling Improves Predictions of Post‐Glacial History of Piper nigrum "

Sandeep Sen, Michael Peter Nobis, Rani M.S. Saggere, Ramanujam Srirama et autres

Benefits of Aquatic Vegetation for Fish in an Ecosystem Dominated by an Invasive Piscivore

Miles I. Peterson, Yoichi Kondo, Naoya Wada, Yoshiaki Tsuda et autres

ABSTRACT Aquatic vegetation plays vital roles throughout aquatic ecosystems through increasing habitat complexity, providing forage and refuge for a variety of organisms, and also through improving water quality. For fish, a host of studies have found a strong correlation between aquatic vegetation …

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Latitudinal Trends in Genetic Diversity and Distinctiveness of Quercus robur Rear Edge Forest Remnants Call for New Conservation Priorities

Camilla Avanzi, Francesca Bagnoli, Edoardo Romiti, Ilaria Spanu et autres

ABSTRACT Aim Knowledge of the spatial distribution of intraspecific genetic variation is essential for planning conservation actions, designing networks of protected areas, and informing possible assisted migration strategies. Although the Italian peninsula harbours unique genetic variation as a legacy of Quaternary migrations, …

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Author response for "Latitudinal Trends in Genetic Diversity and Distinctiveness of Quercus robur Rear Edge Forest Remnants Call for New Conservation Priorities"

Camilla Avanzi, Francesca Bagnoli, Edoardo Romiti, Ilaria Spanu et autres

長野県大町市における野生動物の分布変化による獣害対策とその課題

橋本 操, 陸 天来, 志村 龍太, 熊瀬 卓己 et autres