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<p>Biodiversity loss due to anthropogenic modification is crucial worldwide. In the context of biodiversity conservation, the resilience function of ecosystems is attracting attention. Previous studies have shown that ecosystems exhibit resilience function; however, few have examined post-modification recovery using multiple indices. Identifying which indices indicate ecosystem recovery from anthropogenic modification, and which do not, is crucial for effective conservation. We investigated the relationship between the years since anthropogenic modification and multiple diversity indices—the number of species, functional diversity, and functional redundancy—in the grassland of Nagara river’s embankment, in Japan. We conducted vegetation surveys at nine sites along river embankments with varying years since anthropogenic modification, measuring functional traits and calculating functional diversity and functional redundancy.　Additionally, we analyzed changes in species composition following embankment development. Our results showed that the number of native species increased in years since embankment development passed. Although functional diversity did not recover, functional redundancy improved over time. Furthermore, species composition in recently developed areas was encompassed by the species composition in older areas. These findings suggest that functional diversity recovery may require different conservation approaches than species richness recovery, though experimental studies are needed to establish causal mechanisms for effective management strategies.</p>

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Recovery of plant species and functional diversity from anthropogenic impacts on the river embankment

  • 期刊论文

  • 发表日期：

    2026年2月18日

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  • Kotaro Kuroda,
  • Taketo Mori,
  • Hiroki Yuasa,
  • Kei Uchida

摘要

Biodiversity loss due to anthropogenic modification is crucial worldwide. In the context of biodiversity conservation, the resilience function of ecosystems is attracting attention. Previous studies have shown that ecosystems exhibit resilience function; however, few have examined post-modification recovery using multiple indices. Identifying which indices indicate ecosystem recovery from anthropogenic modification, and which do not, is crucial for effective conservation. We investigated the relationship between the years since anthropogenic modification and multiple diversity indices—the number of species, functional diversity, and functional redundancy—in the grassland of Nagara river’s embankment, in Japan. We conducted vegetation surveys at nine sites along river embankments with varying years since anthropogenic modification, measuring functional traits and calculating functional diversity and functional redundancy.　Additionally, we analyzed changes in species composition following embankment development. Our results showed that the number of native species increased in years since embankment development passed. Although functional diversity did not recover, functional redundancy improved over time. Furthermore, species composition in recently developed areas was encompassed by the species composition in older areas. These findings suggest that functional diversity recovery may require different conservation approaches than species richness recovery, though experimental studies are needed to establish causal mechanisms for effective management strategies.