コケ植物多様性保護のための緊急の国際行動を研究者が提言 (Researchers Call for Urgent Global Action to Protect Bryophyte Diversity)

2026-03-13 中国科学院(CAS)

コケ植物(蘚類・苔類・ツノゴケ類)は約4億7千万年前に陸上進出した重要な植物群だが、保全政策で軽視されている。中国科学院西双版納熱帯植物園の研究は、世界規模で多様性・絶滅リスク・保全ギャップを初めて総合評価。2万種以上のうちIUCN評価は1.5%に過ぎず、その半数以上が絶滅危機と判明した。多様性は標高1000〜2000mの熱帯山地に集中し、農業や森林破壊が主な脅威。研究や資金は欧州偏重で、真の多様性ホットスポットは未研究が多い。地域別対策と評価拡充、資金再配分など緊急の国際的保全行動が求められる。

コケ植物多様性保護のための緊急の国際行動を研究者が提言 (Researchers Call for Urgent Global Action to Protect Bryophyte Diversity)
Bryophytes in subtropical forest. (Image by XTBG)

<関連情報>

世界的な自然保護の盲点:蘚苔類の軽視が生物多様性目標を損なう A Global Conservation Blind Spot: Neglect of Bryophytes Undermines Biodiversity Targets

Xiangbo Yin, Yifei Liu, Fanhao Kong, Lei Shu, Changlian Peng, Lee Ping Ang
Global Change Biology  Published: 09 March 2026
DOI:https://doi.org/10.1111/gcb.70789

ABSTRACT

The global biodiversity crisis is unevenly documented, with conservation assessments heavily biased toward vertebrates and flowering plants. Terrestrial gametophyte-dominant plants (i.e., bryophytes), with over 20,000 species and representing one of Earth’s oldest radiations, remain among the most overlooked. To quantify this gap, we integrated global distribution records, elevation patterns, IUCN datasets, research trends, and threat meta-analyzes. Thirty-seven bryophyte-rich regions and global elevational patterns were identified. We found only 1.5% of bryophyte species have been assessed by the IUCN Red List, and among these assessed species, over half are threatened, nearly twice the global average for plants. Agriculture and climate change emerged as the dominant extinction drivers worldwide, while threats vary regionally: deforestation threatens bryophyte diversity in Africa and South America, while climate change and invasive species are the primary threats in Europe. Without targeted, region-specific conservation strategies, accelerating bryophyte decline will undermine biodiversity targets and jeopardize essential ecosystem functions.

1903自然環境保全
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