Grassland butterflies – important indicators of the state of nature
Peer-Reviewed Publication
Updates every hour. Last Updated: 8-Nov-2025 05:11 ET (8-Nov-2025 10:11 GMT/UTC)
One of the goals of the EU Nature Restoration Regulation, which came into force in 2024, is to halt species loss and preserve important ecosystem services provided by agricultural landscapes. Scientists at the Helmholtz Centre for Environmental Research (UFZ), in collaboration with the Senckenberg German Entomological Institute (SDEI), have now calculated the Grassland Butterfly Index for Germany – an indicator of the state of biodiversity proposed in the EU regulation. The results, published in the journal Nature Conservation, show a negative trend, especially in recent years. For their calculations, the researchers were able to draw on 4 million observation data collected at the UFZ over the last 20 years as part of the ‘Butterfly Monitoring Germany’ programme.
A new study out of the Complexity Science Hub (CSH) reveals that, over 170 years of economic history, the transformation of U.S. cities follows a surprisingly stable rule: while cities evolve and diversify, they on average maintain a constant level of “coherence”—a measure of how well their economic activities fit together.
External quality assessment (EQA) is a cornerstone of laboratory quality management, ensuring the accuracy, comparability, and reliability of test results across institutions. In the Republic of Korea, the Korean Association of External Quality Assessment Service (KAEQAS) has played a leading role since its inception in 1976, expanding from a small-scale clinical chemistry program to over 90 nationwide schemes across all disciplines. This article reviews the historical evolution, operational framework, and scope of KAEQAS, highlighting its contribution to standardization and accreditation. Current challenges include nonmandatory participation, persistent standardization gaps, the need for more category 1 accuracy-based programs, modernization of data analysis and reporting systems, and the establishment of a specimen bank. Future prospects emphasize policy reform, global harmonization, and technological innovation, positioning KAEQAS to further strengthen laboratory quality both nationally and internationally.