Parallel declines in abundance of insects and insectivorous birds in Denmark over 22 years
Anders Pape Møller
See the paper at this link:
https://onlinelibrary.wiley.com/doi/abs/10.1002/ece3.5236
Dr. Anders Pape Moller completed a 21-year study that demonstrates how declining insect abundance may be linked to declines in numbers of insectivorous birds. Published last spring in the journal Ecology and Evolution...
"This 21‐year study of insect abundance showed a tenfold decline. The
decline in insect abundance reported here could partly be attributed to
changes in climate. Such declines in insect abundance may have
consequences for reproductive success in insectivorous birds such as
hirundines (swallows), but also have consequences for population size as documented
in the present study. Long‐term population declines in abundance of
insects must have important consequences for insectivores, interspecific
interactions, and ecosystem functioning."
