J
John W. Williams
Researcher at University of Wisconsin-Madison
Publications - 184
Citations - 17370
John W. Williams is an academic researcher from University of Wisconsin-Madison. The author has contributed to research in topics: Climate change & Vegetation. The author has an hindex of 58, co-authored 180 publications receiving 14884 citations. Previous affiliations of John W. Williams include University of Minnesota & University of California, Santa Barbara.
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Journal ArticleDOI
Approaching a state shift in Earth’s biosphere
Anthony D. Barnosky,Elizabeth A. Hadly,Jordi Bascompte,Eric L. Berlow,James H. Brown,Mikael Fortelius,Wayne M. Getz,John Harte,Alan Hastings,Pablo A. Marquet,Neo D. Martinez,Arne Ø. Mooers,Peter D. Roopnarine,Geerat J. Vermeij,John W. Williams,Rosemary G. Gillespie,Justin Kitzes,Charles R. Marshall,Nicholas J. Matzke,David P. Mindell,Eloy Revilla,Adam B. Smith +21 more
TL;DR: Evidence that the global ecosystem as a whole is approaching a planetary-scale critical transition as a result of human influence is reviewed, highlighting the need to improve biological forecasting by detecting early warning signs of critical transitions.
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Novel climates, no‐analog communities, and ecological surprises
TL;DR: In this paper, the authors show that no-analog communities (communities that are compositionally unlike any found today) occurred frequently in the past and will develop in the greenhouse world of the future.
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Projected distributions of novel and disappearing climates by 2100 AD
TL;DR: In this paper, the authors analyzed multimodel ensembles for the A2 and B1 emission scenarios produced for the fourth assessment report of the Intergovernmental Panel on Climate Change, with the goal of identifying regions projected to experience high magnitudes of local climate change, development of novel 21st-century climates, and/or the disappearance of extant climates.
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Pollen-based continental climate reconstructions at 6 and 21 ka: A global synthesis
Patrick J. Bartlein,Sandy P. Harrison,Sandy P. Harrison,Simon Brewer,Simon Connor,Basil A. S. Davis,Konrad Gajewski,Joel Guiot,T I Harrison-Prentice,A S Henderson,Odile Peyron,Iain Colin Prentice,Iain Colin Prentice,Marko Scholze,Heikki Seppä,Bryan N. Shuman,Shinya Sugita,Robert S. Thompson,A. E. Viau,John W. Williams,Haibin Wu +20 more
TL;DR: In this article, the mid-Holocene (MH, around 6 ka) and the Last Glacial Maximum (LGM, around 21 ka) were compared with palaeoclimate simulations currently being carried out as part of the fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change.
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Late‐quaternary vegetation dynamics in north america: scaling from taxa to biomes
TL;DR: In this article, a review of the late Quaternary vegetation history in northern and eastern North America across levels of ecological organization from individual taxa to biomes, and apply the insights gained from this review to critically examine the biome maps generated from the pollen data.