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The backstory behind our latest NSF-Macrosystems funded project
Insects are among the most abundant and ecologically important animals in the biosphere. Insects pollinate plants and decompose them back into soil. They include serious crop pests and invasive species that cause countless millions in damage. A key goal of macroecology is to understand how and when the number and activity of insects change as one moves from place to place across the U.S., and why those numbers fluctuate from year to year. Such an understanding can help predict insect pest outbreaks, the spread of invasive species, and changes in an ecosystems ability to provide food and fiber and conserve soil nutrients.
Yet macroecological datasets vastly underrepresent the terrestrial invertebrates. This reflects a lack of sampling effort (boots on the ground collecting insects) and identification expertise (eyes in the lab counting and recording them).
Thanks to the NEON pitfall network, 47 invert sampling arrays now span the U.S.’s major ecosystems, collecting insects in pitfall traps. These traps–sunk flush with the soil surface–capture biweekly samples throughout the growing season of each site. We believe these samples are the first step toward a new flourishing invertebrate macroecology. But, beside the carabid beetles, these samples currently consist of jars of bugs in alcohol. For the first time, we have the potential to understand both seasonal and annual invertebrate dynamics at a continental scale. If we could just count, size, and identify all those bugs in all those jars.
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