Publications by authors named "Katja Jacot"
Manual assessment of flower abundance of different flowering plant species in grasslands is a time-consuming process. We present an automated approach to determine the flower abundance in grasslands from drone-based aerial images by using deep learning (Faster R-CNN) object detection approach, which was trained and evaluated on data from five flights at two sites. Our deep learning network was able to identify and classify individual flowers.
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- Floral plantings, like flower strips and hedgerows, are important for improving agricultural ecosystems by providing services such as pest control and pollination, but research on their effectiveness is limited.
- In a study, flower strips were found to improve pest control services by 16% on average, while the impact on crop pollination and yield varied.
- Key factors influencing effectiveness included the distance from plantings (pollination services decreased as distance increased) and the presence of older, more diverse flower strips, which enhanced pollination outcomes.
Managing agricultural landscapes to support biodiversity and ecosystem services is a key aim of a sustainable agriculture. However, how the spatial arrangement of crop fields and other habitats in landscapes impacts arthropods and their functions is poorly known. Synthesising data from 49 studies (1515 landscapes) across Europe, we examined effects of landscape composition (% habitats) and configuration (edge density) on arthropods in fields and their margins, pest control, pollination and yields.
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- - The concept that noncrop habitats can improve pest control while supporting biodiversity has gained traction, but the results are inconsistent across different studies.
- - An analysis of 132 studies showed that while landscape composition often influenced pest and natural enemy populations, the outcomes varied significantly, leading to no definitive improvement in overall pest management.
- - The findings suggest that noncrop habitats do not uniformly enhance pest control, indicating a need for better guidelines to help farmers understand when habitat conservation will actually benefit crop yields.
Providing key resources to animals may enhance both their biodiversity and the ecosystem services they provide. We examined the performance of annual flower strips targeted at the promotion of natural pest control in winter wheat. Flower strips were experimentally sown along 10 winter wheat fields across a gradient of landscape complexity (i.
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