98%
921
2 minutes
20
Recent case studies showing substantial declines of insect abundances have raised alarm, but how widespread such patterns are remains unclear. We compiled data from 166 long-term surveys of insect assemblages across 1676 sites to investigate trends in insect abundances over time. Overall, we found considerable variation in trends even among adjacent sites but an average decline of terrestrial insect abundance by ~9% per decade and an increase of freshwater insect abundance by ~11% per decade. Both patterns were largely driven by strong trends in North America and some European regions. We found some associations with potential drivers (e.g., land-use drivers), and trends in protected areas tended to be weaker. Our findings provide a more nuanced view of spatiotemporal patterns of insect abundance trends than previously suggested.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1126/science.aax9931 | DOI Listing |
Naturwissenschaften
September 2025
Laboratório de Ecologia E Conservação de Invertebrados, LECIN, Departamento de Ecologia E Conservação, Instituto de Ciências Naturais, Universidade Federal de Lavras, PO Box 3037, CEP 37.203-202, Lavras, MG, Brasil.
Fire is a key natural disturbance influencing physical, chemical, and biological processes in the Cerrado. Ash, a fire byproduct, may significantly influence soil macrofauna through its chemical properties. Dung beetles (Scarabaeinae), critical components of Cerrado soil macrofauna, provide key ecological functions and services.
View Article and Find Full Text PDFMed Vet Entomol
September 2025
Laboratorio de Inmunología, Centro de Investigaciones Regionales "Dr. Hideyo Noguchi", Universidad Autónoma de Yucatán, Mérida, México.
The study of population dynamics in a vertical forest gradient provides basic information on the aspects of insect vector natural history that influence the rate of pathogen transmission. In Mexico, these studies are remarkably limited for sand flies recognised as Leishmania vectors. This study analyses the temporal dynamics of sand fly species (Diptera: Psychodidae) along vertical strata of a tropical dry forest in Yucatán, Mexico, an area previously identified as a transmission hotspot for Leishmania mexicana.
View Article and Find Full Text PDFPLoS One
September 2025
Togliatti State University, Togliatti, Russia.
Forest fires have a significant impact on forest fauna, killing not only mammals and birds, but also less noticeable representatives of forest fauna - insects. Existing research have mainly studied the effects on vertebrate taxa, but the data on the effects of fires on the number of insects living in forests is currently insufficient to cover all the groups. The research presented in this paper examines the immediate impact of forest fires on the number of adults in mosquito populations (Culicidae) in burned areas of the boreal forest.
View Article and Find Full Text PDFArch Insect Biochem Physiol
September 2025
Department of Plant Medicals, Andong National University, Andong, Republic of Korea.
The Asiatic apple leafminer, Phyllonorycter ringoniella (Matsumura), is a significant secondary pest of apple trees in Northeast Asia. To better understand its population dynamics, a population model based on temperature-developmental relationships was constructed. This model includes three sub-models: spring emergence, immature stage transition, and adult oviposition.
View Article and Find Full Text PDFInsect Sci
September 2025
Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, Biological Science Research Center, Southwest University, Chongqing, China.
In addition to being one of the primary processes for the formation and expansion of gene families, gene duplication also establishes the basis for the diversity and redundancy of gene functions, providing an abundance of genetic resources and a potent adaptive potential for biological evolution. Trehalose is a high-quality carbon source and blood sugar in insects. However, recent theoretical developments suggest that mechanisms for facilitated trehalose transport in lepidopteran insects remain relatively scarce.
View Article and Find Full Text PDF