Schurr Lucie, Geslin Benoît, Affre Laurence, Gachet Sophie, Delobeau Marion, Brugger Magdalena, Bourdon Sarah, Masotti Véronique
Aix Marseille Univ, Univ Avignon, CNRS, IRD, IMBE, Campus Étoile, Faculté des Sciences St-Jérôme, Case 421 Av Escadrille Normandie Niémen, CEDEX 20, 13397 Marseille, France.
Tours Univ, Polytech Tours, 35, Allée Ferdinand de Lesseps, 37200 Tours, France.
Insects. 2021 Apr 30;12(5):404. doi: 10.3390/insects12050404.
Agricultural landscapes are increasingly characterized by intensification and habitat losses. Landscape composition and configuration are known to mediate insect abundance and richness. In the context of global insect decline, and despite 75% of crops being dependent on insects, there is still a gap of knowledge about the link between pollinators and aromatic crops. Fennel () is an aromatic plant cultivated in the South of France for its essential oil, which is of great economic interest. Using pan-traps, we investigated the influence of the surrounding habitats at landscape scale (semi-natural habitat proportion and vicinity, landscape configuration) and local scale agricultural practices (insecticides and patch size) on fennel-flower-visitor abundance and richness, and their subsequent impact on fennel essential oil yield. We found that fennel may to be a generalist plant species. We did not find any effect of intense local management practices on insect abundance and richness. Landscape configuration and proximity to semi-natural habitat were the main drivers of flying insect family richness. This richness positively influenced fennel essential oil yield. Maintaining a complex configuration of patches at the landscape scale is important to sustain insect diversity and crop yield.
农业景观的特点越来越多地表现为集约化和栖息地丧失。已知景观组成和格局会影响昆虫的数量和丰富度。在全球昆虫数量下降的背景下，尽管75%的作物依赖昆虫授粉，但传粉者与芳香作物之间的联系仍存在知识空白。茴香（）是一种在法国南部种植的芳香植物，因其精油具有重大经济价值。我们使用水盘诱捕法，研究了景观尺度上周围栖息地（半自然栖息地比例和邻近度、景观格局）以及局部尺度上农业实践（杀虫剂和斑块大小）对茴香访花者数量和丰富度的影响，以及它们随后对茴香精油产量的影响。我们发现茴香可能是一种广适性植物物种。我们没有发现高强度局部管理措施对昆虫数量和丰富度有任何影响。景观格局和与半自然栖息地的邻近度是飞行昆虫科丰富度的主要驱动因素。这种丰富度对茴香精油产量有积极影响。在景观尺度上保持斑块的复杂格局对于维持昆虫多样性和作物产量很重要。
