Arthropods, invertebrates including insects that have external skeletons, are declining at an alarming rate. While the tropics harbor the majority of arthropod species, little is known about trends in their abundance. We compared arthropod biomass in Puerto Rico’s Luquillo rainforest with data taken during the 1970s and found that biomass had fallen 10 to 60 times. Our analyses revealed synchronous declines in the lizards, frogs, and birds that eat arthropods.
Bradford C. Lister and Andres Garcia
PNAS October 30, 2018 115 (44) E10397-E10406; published ahead of print October 15, 2018 https://doi.org/10.1073/pnas.1722477115