2026 Michael G. Ryan: Plant Science and Agronomy Researcher – H-Index, Publications & Awards

D-Index & Metrics

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Plant Science and Agronomy	90	274	256	98	91	202	38610
Ecology and Evolution	92	414	390	150	140	222	39415

Discipline name

D-Index

World Ranking

Current World Ranking

National Ranking

Current National Ranking

Publications

Citations

Plant Science and Agronomy

274

256

202

38610

Ecology and Evolution

414

390

150

140

222

39415

Plant Science and Agronomy

D-Index

Citations

38610

World Ranking

274

National Ranking

Ecology and Evolution

D-Index

Citations

39415

World Ranking

414

National Ranking

150

Research.com Recognitions

2026 - Research.com Plant Science and Agronomy in United States Leader Award

Overview

Michael G. Ryan is a researcher affiliated with Colorado State University in the United States. Their primary field of study is Environmental Science, with a significant focus on subfields including Nature and Landscape Conservation, Global and Planetary Change, Education, Ecology, and Soil Science.

The researcher's work covers a range of topics such as Plant Water Relations and Carbon Dynamics, Forest Ecology and Management, Ecology and Vegetation Dynamics Studies, Soil Carbon and Nitrogen Dynamics, Soil and Water Nutrient Dynamics, Plant responses to elevated CO2, and Tree-ring climate responses.

Michael G. Ryan has authored papers published in various scientific venues. Notable recent publications include:

Litter quality controls tradeoffs in soil carbon decomposition and replenishment in a subtropical forest (2023), Journal of Ecology
Foliar respiration is related to photosynthetic, growth and carbohydrate response to experimental drought and elevated temperature (2021), Plant Cell & Environment
Climate and genotype influences on carbon fluxes and partitioning in Eucalyptus plantations (2020), Forest Ecology and Management
Cultivating Teachers When the School Doors Are Shut: Two Teacher-Educators Reflect on Supervision, Instruction, Change and Opportunity During the Covid-19 Pandemic (2020), Frontiers in Education
No carbon storage in growth-limited trees in a semi-arid woodland (2023), Nature Communications

Frequent co-authors collaborating with Michael G. Ryan include Jacqueline G. Van Schooneveld, Clayton Alcarde Álvares, Dan Binkley, Qiuyan Yu, and Lara Prihodko.

The researcher has published multiple works in journals such as Forest Ecology and Management, Environmental Research Ecology, Journal of Ecology, Plant Cell & Environment, and Frontiers in Education.

Michael G. Ryan has also contributed to book publications. Two books titled Classroom Management were published in 2023 by Rowman & Littlefield.

Best Publications

Temperature and soil organic matter decomposition rates – synthesis of current knowledge and a way forward

Richard T. Conant;Richard T. Conant;Michael G. Ryan;Göran I. Ågren;Hannah E. Birge

1723
Citations
Hydraulic Limits to Tree Height and Tree Growth

Michael G. Ryan;Barbara J. Yoder

1444
Citations
Evidence that decomposition rates of organic carbon in mineral soil do not vary with temperature.

Christian P. Giardina;Michael G. Ryan;Michael G. Ryan

1343
Citations
Reconciling carbon-cycle concepts, terminology, and methods

F. S. Chapin Iii;G. M. Woodwell;J. Randerson;E. B. Rastetter

1329
Citations
Effects of Climate Change on Plant Respiration

Michael G. Ryan

1252
Citations
Carbon allocation in forest ecosystems

Creighton M. Litton;James W. Raich;Michael G. Ryan;Michael G. Ryan

1241
Citations
Age-Related Decline in Forest Productivity: Pattern and Process

M.G. Ryan;D. Binkley;J.H. Fownes

1140
Citations
A multi-species synthesis of physiological mechanisms in drought-induced tree mortality

Henry D. Adams;Melanie J.B. Zeppel;Melanie J.B. Zeppel;William R.L. Anderegg;Henrik Hartmann

1102
Citations
Tree and forest functioning in response to global warming

Henrik Saxe;Melvin G. R. Cannell;Øystein Johnsen;Michael G. Ryan

1011
Citations
Interpreting, measuring, and modeling soil respiration

Michael G. Ryan;Beverly E. Law

998
Citations
The hydraulic limitation hypothesis revisited

Michael G. Ryan;Nathan Phillips;Barbara J. Bond

732
Citations
The Boreal Ecosystem-Atmosphere Study (BOREAS) : an overview and early results from the 1994 field year

Piers Sellers;Forrest Hall;K. Jon Ranson;Hank Margolis

709
Citations
Stomatal conductance and photosynthesis vary linearly with plant hydraulic conductance in ponderosa pine

Robert M. Hubbard;M. G. Ryan;V. Stiller;J. S. Sperry

686
Citations
The likely impact of elevated [CO2], nitrogen deposition, increased temperature and management on carbon sequestration in temperate and boreal forest ecosystems: a literature review.

Ritta Hyvönen;Goran I. Agren;Sune Linder;Tryggve Persson

673
Citations
Continued warming could transform Greater Yellowstone fire regimes by mid-21st century

Anthony L. Westerling;Monica G. Turner;Erica A. H. Smithwick;William H. Romme

667
Citations
Foliage, fine-root, woody-tissue and stand respiration in Pinus radiata in relation to nitrogen status.

Michael G. Ryan;Robert M. Hubbard;Silvia Pongracic;R. J. Raison

660
Citations
BOREAS in 1997: Experiment overview, scientific results, and future directions

Piers J. Sellers;Forrest G. Hall;Robert D. Kelly;Andrew Black

658
Citations
Seasonal and annual respiration of a ponderosa pine ecosystem

Beverly E. Law;Michael G. Ryan;Peter M. Anthoni

637
Citations
Evidence of reduced photosynthetic rates in old trees.

B. J. Yoder;M. G. Ryan;R. H. Waring;A. W. Schoettle

597
Citations
A synthesis of current knowledge on forests and carbon storage in the United States

Duncan C. McKinley;Duncan C. McKinley;Michael G. Ryan;Michael G. Ryan;Richard A. Birdsey;Christian P. Giardina

545
Citations
Annual carbon cost of autotrophic respiration in boreal forest ecosystems in relation to species and climate

Michael G. Ryan;Michael B. Lavigne;Stith T. Gower

512
Citations