Stazione Zoologica Anton Dohrn, National Institute of Marine Biology, Ecology and Biotechnology, Ischia Marine Center, Naples, Italy.
Laboratoire d'Océanographie de Villefranche, Sorbonne Université, CNRS, Villefranche-sur-mer, France.
Glob Chang Biol. 2024 Jan;30(1):e17105. doi: 10.1111/gcb.17105.
Global environmental change drives diversity loss and shifts in community structure. A key challenge is to better understand the impacts on ecosystem function and to connect species and trait diversity of assemblages with ecosystem properties that are in turn linked to ecosystem functioning. Here we quantify shifts in species composition and trait diversity associated with ocean acidification (OA) by using field measurements at marine CO vent systems spanning four reef habitats across different depths in a temperate coastal ecosystem. We find that both species and trait diversity decreased, and that ecosystem properties (understood as the interplay between species, traits, and ecosystem function) shifted with acidification. Furthermore, shifts in trait categories such as autotrophs, filter feeders, herbivores, and habitat-forming species were habitat-specific, indicating that OA may produce divergent responses across habitats and depths. Combined, these findings reveal the importance of connecting species and trait diversity of marine benthic habitats with key ecosystem properties to anticipate the impacts of global environmental change. Our results also generate new insights on the predicted general and habitat-specific ecological consequences of OA.
全球环境变化导致生物多样性丧失和群落结构转变。一个关键的挑战是更好地理解其对生态系统功能的影响，并将群落的物种和特征多样性与生态系统特性联系起来，而生态系统特性又与生态系统功能相关联。在这里，我们通过在温带沿海生态系统中跨越四个不同深度的珊瑚礁栖息地的海洋 CO2 喷口系统进行实地测量，量化了与海洋酸化（OA）相关的物种组成和特征多样性的变化。我们发现，物种和特征多样性都减少了，而生态系统特性（被理解为物种、特征和生态系统功能之间的相互作用）随着酸化而发生了变化。此外，自养生物、滤食者、草食动物和造礁物种等特征类别的变化具有栖息地特异性，表明 OA 可能在不同的栖息地和深度产生不同的反应。综上所述，这些发现揭示了将海洋底栖生境的物种和特征多样性与关键生态系统特性联系起来以预测全球环境变化影响的重要性。我们的研究结果还为 OA 的普遍和特定栖息地的生态后果提供了新的见解。
