John O’Keefe

5.9k citations

24 papers · 3.5k indexed · 2 hit papers · h-index 16

Impact in

Ecological Modeling top 0.5%
- Species Distribution and Climate Change
Global and Planetary Change top 0.5%
- Plant Water Relations and Carbon Dynamics
- Land Use and Ecosystem Services

Papers in

Ecological Modeling 8
- Species Distribution and Climate Change 8
Global and Planetary Change 15
- Plant Water Relations and Carbon Dynamics 13

Co-authors: Andrew D. Richardson M. A. Friedl Trevor F. Keenan J. William Munger Amey S. Bailey David Y. Hollinger Koen Hufkens Oliver Sonnentag
Journals: Ecological Applications (3 papers)Agricultural and Forest Meteorology (3 papers)Global Change Biology (3 papers)Journal of Geophysical Research Atmospheres (1 paper)Nature Climate Change (1 paper)
Partner nations: United States Canada Australia

In The Last Decade

John O’Keefe

24 papers receiving 3.4k citations

Hit Papers

align trajectories log scale

Net carbon uptake has increased through warming-induced changes in temperate forest phenology 2014 · 770 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2014 Nature Climate Change
2011 Agricultural and Forest Meteorology

Peers

Countries citing papers authored by John O’Keefe

Since Specialization

Citations

This map shows the geographic impact of John O’Keefe's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by John O’Keefe with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John O’Keefe more than expected).

Fields of papers citing papers by John O’Keefe

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John O’Keefe. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by John O’Keefe. The network helps show where John O’Keefe may publish in the future.

Co-authorship network

The 25 scholars most cited alongside John O’Keefe, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with John O’Keefe Line = papers co-authored together John O’Keefe links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Fine-scale perspectives on landscape phenology from unmanned aerial vehicle (UAV) photography Agricultural and Forest Meteorology ·Stephen Klosterman, E. K. Melaas, Jonathan Wang, Arturo Martínez, Carmen Zavaleta, John O’Keefe, David A. Orwig, Zhuosen Wang, Qingsong Sun, Crystal Schaaf, M. A. Friedl, Andrew D. Richardson	2017	125
2	Tracking forest phenology and seasonal physiology using digital repeat photography: a critical assessment Ecological Applications ·Trevor F. Keenan, B. Darby, Воронина Мария Михайловна, Oliver Sonnentag, M. A. Friedl, Koen Hufkens, John O’Keefe, Stephen Klosterman, J. William Munger, Michael Toomey, Andrew D. Richardson	2014	185
3	Age, allocation, and availability of nonstructural carbohydrates in red maple EGUGA ·Mariah S. Carbone, Xiang Wen-min, C. I. Czimczik, Paula F. Murakami, John O’Keefe, Neil Pederson, Paul G. Schaberg, Xiaomei Xu, Andrew D. Richardson	2013	2
4	Predicting Climate Change Impacts on the Amount and Duration of Autumn Colors in a New England Forest PLoS ONE ·Marco Archetti, Andrew D. Richardson, John O’Keefe, Nicolas Delpierre	2013	94
5	On the uncertainty of phenological responses to climate change and its implication for terrestrial biosphere models Mirco Migliavacca, Fay Gkaniatsou, Trevor F. Keenan, Alessandro Cescatti, John O’Keefe, Andrew D. Richardson	2012	6
6	On the uncertainty of phenological responses to climate change, and implications for a terrestrial biosphere model Biogeosciences ·Mirco Migliavacca, Oliver Sonnentag, Trevor F. Keenan, Alessandro Cescatti, John O’Keefe, Andrew D. Richardson	2012	147
7	Ecological impacts of a widespread frost event following early spring leaf‐out Global Change Biology ·Koen Hufkens, M. A. Friedl, Trevor F. Keenan, Oliver Sonnentag, Amey S. Bailey, John O’Keefe, Andrew D. Richardson	2012	219
8	Digital repeat photography for phenological research in forest ecosystems Agricultural and Forest Meteorology ·Oliver Sonnentag, Koen Hufkens, Silas Anderson, Adam M. Young, M. A. Friedl, B. H. Braswell, Tom Milliman, John O’Keefe, Andrew D. Richardson Hit paper breakdown →	2011	479
9	Influence of springtime phenology on the ratio of soil respiration to total ecosystem respiration in a mixed temperate forest Ghent University Academic Bibliography (Ghent University) ·Jasper Bloemen, Kathy Steppe, Eric A. Davidson, J. William Munger, John O’Keefe, K. E. Savage, Hans Verbeeck, Andrew D. Richardson	2010	1
10	Influence of spring phenology on seasonal and annual carbon balance in two contrasting New England forests Tree Physiology ·Andrew D. Richardson, David Y. Hollinger, D. B. Dail, Liu Zhihui, J. William Munger, John O’Keefe	2009	303
11	Leaf phenology in 22 North American tree species during the 21st century Global Change Biology ·Xavier Morin, Martin J. Lechowicz, Carol K. Augspurger, John O’Keefe, David Viner, Isabelle Chuine	2009	274
12	Phenological Differences Between Understory and Overstory: A Case Study Using the Long-Term Harvard Forest Records Andrew D. Richardson, John O’Keefe	2009	68
13	Remote sensing data assimilation for a prognostic phenology model Journal of Geophysical Research Atmospheres ·Reto Stöckli, This Rutishauser, D. Dragoni, John O’Keefe, Peter Thornton, Matt Jolly, Jawaid Hasan, Scott Denning	2008	129
14	Challenges for freshwater biodiversity research: science plan and implementation strategy ePublications@SCU (Southern Cross University) ·Robert J. Naiman, Anne‐Hélène Prieur‐Richard, Angela H. Arthington, David Dudgeon, Mark O. Gessner, Zen’ichiro Kawabata, Duncan Knowler, John O’Keefe, Christian Lévêque, Doris Soto, Melanie L. J. Stiassny, Caroline A Sullivan	2006	2
15	Phenology of a northern hardwood forest canopy Global Change Biology ·Andrew D. Richardson, Amey S. Bailey, Ellen G. Denny, C. Wayne Martin, John O’Keefe	2006	371
16	Pigment dynamics and autumn leaf senescence in a New England deciduous forest, eastern USA Ecological Research ·David W. Lee, John O’Keefe, N. Michèle Holbrook, Taylor S. Feild	2003	171
17	VARIATIONS IN OLD-GROWTH STRUCTURE AND DEFINITIONS: FOREST DYNAMICS ON WACHUSETT MOUNTAIN, MASSACHUSETTS Ecological Applications ·David A. Orwig, Charles V. Cogbill, David R. Foster, John O’Keefe	2001	49
18	New England Forests Through Time : Insights from the Harvard Forest Dioramas Medical Entomology and Zoology ·David R. Foster, John O’Keefe	2000	24
19	Longevity and persistence of alder west of the tree line on the Seward Peninsula, Alaska Canadian Journal of Botany ·Brayton F. Wilson, William P. Patterson, John O’Keefe	1985	8
20	MOUNTAIN LAUREL (KALMIA LATIFOLIA L.) DISTRIBUTION IN MASSACHUSETTS Biodiversity Heritage Library (Smithsonian Institution) ·Brayton F. Wilson, John O’Keefe	1983	3

About John O’Keefe

John O’Keefe is a scholar working on Ecological Modeling, Global and Planetary Change, Ecology, Ecology, Evolution, Behavior and Systematics and Nature and Landscape Conservation, having authored 24 papers that have together received 3.5k indexed citations. Recurring topics across this work include Plant Water Relations and Carbon Dynamics (13 papers), Remote Sensing in Agriculture (12 papers), Species Distribution and Climate Change (8 papers), Tree-ring climate responses (4 papers), Plant and animal studies (4 papers), Horticultural and Viticultural Research (3 papers), Ecology and Vegetation Dynamics Studies (2 papers) and Remote Sensing and LiDAR Applications (2 papers). The work is most often cited by research in Ecological Modeling (1.2k citations), Global and Planetary Change (2.4k citations), Ecology (2.1k citations), Nature and Landscape Conservation (674 citations) and Environmental Engineering (610 citations). John O’Keefe has collaborated with scholars based in United States, Canada and Australia. Frequent co-authors include Andrew D. Richardson, M. A. Friedl, Trevor F. Keenan, J. William Munger, Amey S. Bailey, David Y. Hollinger, Koen Hufkens, Oliver Sonnentag, Michael Toomey and Josh Gray. Their work appears in journals such as Ecological Applications, Agricultural and Forest Meteorology, Global Change Biology, Journal of Geophysical Research Atmospheres and Nature Climate Change.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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