After bees and birds, insects and other arthropods have also suffered massive losses, a study from a Puerto Rico forest published on Monday showed, citing the impact of climate change. Measuring the population of arthropods, which includes insects, caterpillars, and spiders, is not simple but one method is to place sticky traps on the ground and in the forest canopy. Lister, of Rensselaer Polytechnic Institute in Troy, New York, returned there with another biologist in 2011 and 2012 to use the same methods.
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