Insect declines are being reported worldwide for flying, ground, and aquatic lineages. Most
reports come from western and northern Europe, where the insect fauna is well-studied and�…

BACKGROUND The United Nations Framework Convention on Climate Change (UNFCCC)
was established in 1992 to pursue the “stabilization of greenhouse gas concentrations at a�…

Nature is under siege. In the last 10,000 y the human population has grown from 1 million to
7.8 billion. Much of Earth's arable lands are already in agriculture (1), millions of acres of�…

Several previous studies have investigated changes in insect biodiversity, with some
highlighting declines and others showing turnover in species composition without net�…

Species extinctions have defined the global biodiversity crisis, but extinction begins with loss
in abundance of individuals that can result in compositional and functional changes of�…

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�…

The ongoing sixth mass species extinction is the result of the destruction of component
populations leading to eventual extirpation of entire species. Populations and species�…

Here we build on the manifesto 'World Scientists' Warning to Humanity, issued by the
Alliance of World Scientists. As a group of conservation biologists deeply concerned about�…

As anthropogenic climate change continues the risks to biodiversity will increase over time,
with future projections indicating that a potentially catastrophic loss of global biodiversity is�…

Biodiversity of insects is threatened worldwide. Here, we present a comprehensive review of
73 historical reports of insect declines from across the globe, and systematically assess the�…