J
John R. Townshend
Researcher at University of Maryland, College Park
Publications - 200
Citations - 41600
John R. Townshend is an academic researcher from University of Maryland, College Park. The author has contributed to research in topics: Land cover & Normalized Difference Vegetation Index. The author has an hindex of 76, co-authored 200 publications receiving 36395 citations. Previous affiliations of John R. Townshend include University of Reading.
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Journal ArticleDOI
High-Resolution Global Maps of 21st-Century Forest Cover Change
Matthew C. Hansen,Peter Potapov,Rebecca Moore,M. Hancher,Svetlana Turubanova,Alexandra Tyukavina,David Thau,Stephen V. Stehman,Scott J. Goetz,Thomas R. Loveland,Anil Kommareddy,A. Egorov,Louise Chini,Christopher O. Justice,John R. Townshend +14 more
TL;DR: Intensive forestry practiced within subtropical forests resulted in the highest rates of forest change globally, and boreal forest loss due largely to fire and forestry was second to that in the tropics in absolute and proportional terms.
Journal ArticleDOI
Habitat fragmentation and its lasting impact on Earth’s ecosystems
Nick M. Haddad,Lars A. Brudvig,Jean Clobert,Kendi F. Davies,Andrew Gonzalez,Robert D. Holt,Thomas E. Lovejoy,Joseph O. Sexton,Mike P. Austin,Cathy D. Collins,William M. Cook,Ellen I. Damschen,Robert M. Ewers,Bryan L. Foster,Clinton N. Jenkins,Andrew J. King,William F. Laurance,Douglas J. Levey,Chris Margules,Chris Margules,Brett A. Melbourne,A. O. Nicholls,A. O. Nicholls,John L. Orrock,Dan-Xia Song,John R. Townshend +25 more
TL;DR: An analysis of global forest cover is conducted to reveal that 70% of remaining forest is within 1 km of the forest’s edge, subject to the degrading effects of fragmentation, indicating an urgent need for conservation and restoration measures to improve landscape connectivity.
Journal ArticleDOI
Global land cover classification at 1 km spatial resolution using a classification tree approach
TL;DR: In this paper, a 1km spatial resolution land cover classification using data for 1992-1993 from the Advanced Very High Resolution Radiometer (AVHRR) is presented. But the approach taken involved a hierarchy of pair-wise class trees where a logic based on vegetation form was applied until all classes were depicted.
Supplementary Materials for Habitat fragmentation and its lasting impact on Earth's ecosystems
Nick M. Haddad,Lars A. Brudvig,Jean Clobert,Kendi F. Davies,Andrew Gonzalez,Robert D. Holt,Thomas E. Lovejoy,Joseph O. Sexton,Mike P. Austin,Cathy D. Collins,William M. Cook,Ellen I. Damschen,Robert M. Ewers,Bryan L. Foster,Clinton N. Jenkins,Andrew J. King,William F. Laurance,Douglas J. Levey,Chris R. Margules,Brett A. Melbourne,A. O. Nicholls,John L. Orrock,Dan-Xia Song,John R. Townshend +23 more
TL;DR: In this article, the authors conducted an analysis of global forest cover to reveal that 70% of remaining forest is within 1 km of the forest's edge, subject to the degrading effects of fragmentation.
Journal ArticleDOI
An assessment of support vector machines for land cover classification
TL;DR: An introduction to the theoretical development of the SVM and an experimental evaluation of its accuracy, stability and training speed in deriving land cover classifications from satellite images are given.