Acknowledgments * Introduction: The New Resources of the National Parks--Robert Manning, Peter Newman, Jesse Barber, Christopher Monz, Jeffrey Hallo, and Steven Lawson * PART 1: THE ECOLOGY OF NATURAL QUIET * A Framework for Understanding Noise Impacts on Wildlife: An Urgent Conservation Priority--Clinton Francis and Jesse Barber * A Phantom Road Experiment Reveals Traffic Noise Is an Invisible Source of Habitat Degradation--Heidi Ware, Christopher McClure, Jay Carlisle, and Jesse Barber * Noise Pollution Alters Ecological Services: Enhanced Pollination and Disrupted Seed Dispersal--Clinton Francis, Nathan Kleist, Catherine Ortega, and Alexander Cruz * Anthropogenic Noise Increases Fish Mortality by Predation--Stephen Simpson, Andrew Radford, Sophie Nedelec, Maud Ferrari, Douglas Chivers, Mark McCormick, and Mark Meekan * Light and Noise Pollution Interact to Disrupt Interspecific Interactions--Taegan McMahon, Jason Rohr, and Ximena Bernal * PART 2: THE EXPERIENCE OF NATURAL QUIET * Human Responses to Simulated Motorized Noise in National Parks--David Weinzimmer, Peter Newman, Derrick Taff, Jacob Benfield, Emma Lynch, and Paul Bell * Natural Sound Facilitates Mood Recovery from Stress--Jacob Benfield, Derrick Taff, Peter Newman, and Joshua Smyth * A Program of Research to Support Management of Visitor-Caused Noise at Muir Woods National Monument--Robert Manning, Peter Newman, Kurt Fristrup, David Stack, and Ericka Pilcher * The Role of Messaging on Acceptability of Military Aircraft Sounds in Sequoia National Park--Derrick Taff, Peter Newman, Steven Lawson, Alan Bright, Lelaina Marin, Adam Gibson, and Tim Archer * Modeling and Mapping Hikers' Exposure to Transportation Noise in Rocky Mountain National Park--Logan Park, Steve Lawson, Ken Kaliski, Peter Newman, and Adam Gibson * PART 3: THE ECOLOGY OF NATURAL DARKNESS * The Ecological Impacts of Nighttime Light Pollution: A Mechanistic Appraisal--Kevin Gaston, Jonathan Bennie, Thomas Davies, and John Hopkins * Reduced Flight-to-Light Behavior of Moth Populations Exposed to Long-Term Urban Light Pollution--Florian Altermatt and Dieter Ebert * Artificial Night Lighting Affects Dawn Song, Extra-Pair Siring Success, and Lay Date in Songbirds--Bart Kempenaers, Pernilla Borgstroem, Peter Loes, Emmi Schlicht, and Mihai Valcu * Artificial Light Puts Ecosystem Services of Frugivorous Bats at Risk--Daniel Lewanzik and Christian Voigt * Light Pollution Is Associated with Earlier Tree Budburst across the United Kingdom--Richard ffrench-Constant, Robin Somers-Yeates, Jonathan Bennie, Theodoros Economou, David Hodgson, Adrian Spalding, and Peter McGregor * PART 4: THE EXPERIENCE OF NATURAL DARKNESS * Preserving Pristine Night Skies in National Parks and the Wilderness Ethic--Dan Duriscoe * A System-Wide Assessment of Night Resources and Night Recreation in the U.S. National Parks--Brandi Smith and Jeffrey Hallo * Indicators and Standards of Quality for Viewing the Night Sky in the National Parks--Robert Manning, Ellen Rovelstad, Chadwick Moore, Jeffrey Hallo, and Brandi Smith * Visitor Evaluation of Night Sky Interpretation--Britton Mace and Jocelyn McDaniel * "Astronomical Tourism--Fredrick Collison and Kevin Poe * CONCLUSION: Principles of Studying and Managing Natural Quiet and Natural Darkness in the National Parks--Robert Manning, Peter Newman, Jesse Barber, Christopher Monz, Jeffrey Hallo, and Steven Lawson * References * Index.