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<p>Fish production in ponds has received less attention in the context of reconciliation between agricultural production and biodiversity conservation. These systems can contain remarkable biodiversity, including rich macrophyte communities. However, management intensification resulted in ecosystem and biodiversity deterioration. The present study capitalizes on two well-studied fish pond regions (Dombes, France, and Midden-Limburg, Belgium) to investigate how fish stock management type affects local and regional macrophyte community characteristics. We used data from macrophyte inventories in a set of ponds representing major management types. Our results reveal that fish stock management strongly affects local macrophyte richness and community composition. Management types with higher fish stock densities had lower local richness and the highest local diversity was found in ponds without fish stocking. Differences in community composition between management types within region were primarily determined by nestedness patterns. Communities in ponds with higher fish densities formed nested subsets of communities in ponds with lower fish densities. Our findings suggest that successfully combining fish production with biodiversity conservation, and enhancing macrophyte diversity in large anthropogenic fish pond systems, may be best achieved with a subset of ponds managed without fish stocking, while others are more intensively managed for fish farming.</p>

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Fish stock management as a driver of a nested community structure of macrophytes in fish pond systems

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月29日

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  • Léo Girard,
  • Joël Robin,
  • Soraya Rouifed,
  • Vincent Tolon,
  • Robby Wijns,
  • Luc De Meester,
  • Alexander Wezel,
  • Pieter Lemmens

摘要

Fish production in ponds has received less attention in the context of reconciliation between agricultural production and biodiversity conservation. These systems can contain remarkable biodiversity, including rich macrophyte communities. However, management intensification resulted in ecosystem and biodiversity deterioration. The present study capitalizes on two well-studied fish pond regions (Dombes, France, and Midden-Limburg, Belgium) to investigate how fish stock management type affects local and regional macrophyte community characteristics. We used data from macrophyte inventories in a set of ponds representing major management types. Our results reveal that fish stock management strongly affects local macrophyte richness and community composition. Management types with higher fish stock densities had lower local richness and the highest local diversity was found in ponds without fish stocking. Differences in community composition between management types within region were primarily determined by nestedness patterns. Communities in ponds with higher fish densities formed nested subsets of communities in ponds with lower fish densities. Our findings suggest that successfully combining fish production with biodiversity conservation, and enhancing macrophyte diversity in large anthropogenic fish pond systems, may be best achieved with a subset of ponds managed without fish stocking, while others are more intensively managed for fish farming.