Citizen-science projects engage volunteers to gather or process data to address scientific
questions. But citizen-science projects vary in their ability to contribute usefully for science …

Billions of nocturnally migrating birds move through increasingly photopolluted skies, relying
on cues for navigation and orientation that artificial light at night (ALAN) can impair …

Climate change induced phenological shifts in primary productivity result in trophic
mismatches for many organisms,,–, with broad implications for ecosystem structure and …

Computational sustainability: computing for a better world and a sustainable future Page 1 56
COMMUNICATIONS OF THE ACM | SEPTEMBER 2019 | VOL. 62 | NO. 9 Computational …

Billions of animals cross the globe each year during seasonal migrations, but efforts to
monitor them are hampered by the unpredictability of their movements. We developed a bird …

Avian migration is one of Earth's largest processes of biomass transport, involving billions of
birds. We estimated continental biomass flows of nocturnal avian migrants across the …

Nocturnal avian migration flyways remain an elusive concept, as we have largely lacked
methods to map their full extent. We used the network of European weather radars to …

Migrating birds require en route habitats to rest and refuel. Yet, habitat use has never been
integrated with passage to understand the factors that determine where and when birds …

The upgrade of the national network of next‐generation weather surveillance radars
(NEXRAD) in the United States to dual polarizations has been completed, providing three …

Quantifying the timing and intensity of migratory movements is imperative for understanding
impacts of changing landscapes and climates on migratory bird populations. Billions of birds …