World's Best Scientists 2026 revealed!

D-Index & Metrics

Plant Science and Agronomy

D-Index
87
Citations
33799
World Ranking
314
National Ranking
109

Ecology and Evolution

D-Index
87
Citations
33528
World Ranking
544
National Ranking
192

Research.com Recognitions

  • 2018 - Fellow of the American Association for the Advancement of Science (AAAS)
  • 2015 - Fellow of the American Academy of Arts and Sciences
  • 1984 - Fellow of John Simon Guggenheim Memorial Foundation

Overview

Karl J. Niklas is affiliated with Cornell University in the United States and has an extensive body of research primarily in Agricultural and Biological Sciences and Environmental Science. Their work spans several subfields including Plant Science, Nature and Landscape Conservation, Ecology, Evolution, Behavior and Systematics, Global and Planetary Change, and Ecology.

The scientist's research addresses multiple main topics, focusing on ecology and vegetation dynamics studies, leaf properties and growth measurement, plant water relations and carbon dynamics, plant and animal studies, soil carbon and nitrogen dynamics, forest ecology and management, and remote sensing in agriculture.

Karl J. Niklas has published papers in various frequent venues with multiple contributions including Frontiers in Plant Science, American Journal of Botany, Botany Letters, Annals of the New York Academy of Sciences, and New Phytologist.

Recent papers include:

  • "Leaf water content contributes to global leaf trait relationships," 2022, Nature Communications
  • "A whole-plant economics spectrum including bark functional traits for 59 subtropical woody plant species," 2021, Journal of Ecology
  • "Linking ecomechanical models and functional traits to understand phenotypic diversity," 2021, Trends in Ecology & Evolution
  • "Global patterns and predictors of soil microbial biomass carbon, nitrogen, and phosphorus in terrestrial ecosystems," 2022, CATENA
  • "Nondestructive estimation of leaf area for 15 species of vines with different leaf shapes," 2020, American Journal of Botany

Frequent co-authors in their research include Peijian Shi, Ülo Niinemets, Jianming Deng, Shucun Sun, and Zhiqiang Wang.

Karl J. Niklas's career includes recognition through several fellowships: Fellow of the American Association for the Advancement of Science (AAAS) awarded in 2018, Fellow of the American Academy of Arts and Sciences awarded in 2015, and Fellow of the John Simon Guggenheim Memorial Foundation awarded in 1984.

Best Publications

  • Biomass allocation to leaves, stems and roots: meta-analyses of interspecific variation and environmental control

    Hendrik Poorter;Karl J. Niklas;Peter B. Reich;Peter B. Reich;Jacek Oleksyn;Jacek Oleksyn

  • Plant Biomechanics: An Engineering Approach to Plant Form and Function

    Karl J. Niklas

  • Plant Allometry: The Scaling of Form and Process

    Karl J. Niklas

  • Global Allocation Rules for Patterns of Biomass Partitioning in Seed Plants

    Brian J. Enquist;Karl J. Niklas

  • Invariant scaling relations across tree-dominated communities

    Brian J. Enquist;Brian J. Enquist;Karl J. Niklas

  • The evolutionary biology of plants

    Karl J. Niklas

  • The evolution and functional significance of leaf shape in the angiosperms

    Adrienne B. Nicotra;Andrea Leigh;C. Kevin Boyce;Cynthia S. Jones

  • Invariant scaling relationships for interspecific plant biomass production rates and body size

    Karl J. Niklas;Brian J. Enquist

  • A Reevaluation of the Key Factors That Influence Tomato Fruit Softening and Integrity

    Montserrat Saladié;Antonio J. Matas;Tal Isaacson;Matthew A. Jenks

  • Plant allometry: is there a grand unifying theory?

    Karl J. Niklas

  • The modern theory of biological evolution: an expanded synthesis.

    Ulrich Kutschera;Karl J. Niklas

  • The aerodynamics of wind pollination

    Karl J. Niklas

  • A mechanical perspective on foliage leaf form and function

    Karl J. Niklas

  • Patterns in vascular land plant diversification

    Karl J. Niklas;Brace H. Tiffney;Andrew H. Knoll

  • Size-dependent Allometry of Tree Height, Diameter and Trunk-taper

    Karl J. Niklas

  • Nitrogen/phosphorus leaf stoichiometry and the scaling of plant growth

    Karl J. Niklas;Thomas Owens;Peter B. Reich;Edward D. Cobb

  • Growth and hydraulic (not mechanical) constraints govern the scaling of tree height and mass

    Karl J. Niklas;Hanns Christof Spatz

  • On the vegetative biomass partitioning of seed plant leaves, stems, and roots.

    Karl J. Niklas;Brian J. Enquist

  • Thermodynamic and metabolic effects on the scaling of production and population energy use

    S. K. Morgan Ernest;Brian J. Enquist;James H. Brown;Eric L. Charnov

  • The epidermal-growth-control theory of stem elongation: An old and a new perspective

    U. Kutschera;K.J. Niklas

  • Darwin’s second “abominable mystery”: Why are there so many angiosperm species?

    William L. Crepet;Karl J. Niklas

  • The role of Quaternary environmental change in plant macroevolution: the exception or the rule?

    Katherine J. Willis;Karl J. Niklas

  • “Diminishing returns” in the scaling of functional leaf traits across and within species groups

    Karl J. Niklas;Edward D. Cobb;Ülo Niinemets;Peter B. Reich

  • Similarity of mammalian body size across the taxonomic hierarchy and across space and time.

    Felisa A. Smith;Felisa A. Smith;James H. Brown;John P. Haskell;S. Kathleen Lyons

  • The evolution of the land plant life cycle

    Karl J. Niklas;Ulrich Kutschera

  • Introduction to the Algae: Structure and Reproduction.

    Karl J. Niklas;Harold C. Bold;Michael J. Wynne

Frequent Co-Authors

Brian J. Enquist
Brian J. Enquist University of Arizona
Ulrich Kutschera
Ulrich Kutschera University of Kassel
Peter B. Reich
Peter B. Reich University of Minnesota
Stuart A. Newman
Stuart A. Newman New York Medical College
Andrew H. Knoll
Andrew H. Knoll Harvard University
A. Keith Dunker
A. Keith Dunker Indiana University
James H. Brown
James H. Brown University of New Mexico
William L. Crepet
William L. Crepet Cornell University
Cang Hui
Cang Hui Stellenbosch University
Felisa A. Smith
Felisa A. Smith University of New Mexico

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