J
John R. Sauer
Researcher at Patuxent Wildlife Research Center
Publications - 171
Citations - 19563
John R. Sauer is an academic researcher from Patuxent Wildlife Research Center. The author has contributed to research in topics: Population & Breeding bird survey. The author has an hindex of 61, co-authored 170 publications receiving 17710 citations. Previous affiliations of John R. Sauer include United States Geological Survey & United States Fish and Wildlife Service.
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Journal ArticleDOI
Global Biodiversity: Indicators of Recent Declines
Stuart H. M. Butchart,Stuart H. M. Butchart,Matt Walpole,Ben Collen,Arco J. van Strien,Jörn P. W. Scharlemann,Rosamunde E. A. Almond,Jonathan E. M. Baillie,Bastian Bomhard,Ciaire Brown,John F. Bruno,Kent E. Carpenter,Geneviève M. Carr,Janice Chanson,Anna M. Chenery,Jorge Csirke,Nick C. Davidson,Frank Dentener,Matthew N. Foster,Alessandro Galli,James N. Galloway,Piero Genovesi,Richard D. Gregory,Marc Hockings,Valerie Kapos,Valerie Kapos,Jean-Francois Lamarque,Fiona Leverington,Jonathan Loh,Melodie A. McGeoch,Louise McRae,Anahit Minasyan,Monica Hernández Morcillo,Thomasina E.E. Oldfield,Daniel Pauly,Suhel Quader,Carmen Revenga,John R. Sauer,Benjamin Skolnik,Dian Spear,Damon Stanwell-Smith,Simon N. Stuart,Andy Symes,Megan Tierney,Tristan D. Tyrrell,Jean Christophe Vié,Reg Watson +46 more
TL;DR: Most indicators of the state of biodiversity showed declines, with no significant recent reductions in rate, whereas indicators of pressures on biodiversity showed increases, indicating that the Convention on Biological Diversity’s 2010 targets have not been met.
Journal ArticleDOI
Decline of the North American avifauna
Kenneth V. Rosenberg,Kenneth V. Rosenberg,Adriaan M. Dokter,Peter J. Blancher,John R. Sauer,Adam C. Smith,Paul A. Smith,Jessica C. Stanton,Arvind O. Panjabi,Laura Helft,Michael J. Parr,Peter P. Marra,Peter P. Marra +12 more
TL;DR: Using multiple and independent monitoring networks, population losses across much of the North American avifauna over 48 years are reported, including once-common species and from most biomes, demonstrating a continuing avifaunal crisis.
Journal ArticleDOI
Population declines in North American birds that migrate to the neotropics.
TL;DR: Neotropical migrant species that primarily use forested habitats in either wintering or breeding areas are declining, but a statistically significant association between habitat and population declines was detected only in the tropics.
Journal ArticleDOI
A double-observer approach for estimating detection probability and abundance from point counts
James D. Nichols,James E. Hines,John R. Sauer,Frederick W. Fallon,Jane E. Fallon,Patricia J. Heglund +5 more
TL;DR: In this paper, a double-observer approach was applied to estimate detection probabilities for aerial surveys (Cook and Jacobson 1979) to avian point counts, where a designated primary observer indicates to another (secondary) observer all birds detected.
Journal ArticleDOI
Large scale wildlife monitoring studies: statistical methods for design and analysis
Kenneth H. Pollock,James D. Nichols,Theodore R. Simons,George L. Farnsworth,Larissa L. Bailey,John R. Sauer +5 more
TL;DR: Basic concepts based on actual avian, amphibian, and fish monitoring studies are presented in this article and it is believed that the estimation of detection probability should be built into the monitoring design through a double sampling approach.