World's Best Scientists 2026 revealed!
Leonard I. Wassenaar

Leonard I. Wassenaar

D-Index & Metrics

Ecology and Evolution

D-Index
74
Citations
19775
World Ranking
1123
National Ranking
65

Overview

Leonard I. Wassenaar is affiliated with the University of Ottawa in Canada and specializes in Environmental Science and Earth and Planetary Sciences. Their research covers a variety of subfields including Ecology, Geochemistry and Petrology, Global and Planetary Change, Oceanography, and Atmospheric Science.

Their main research topics encompass Groundwater and Isotope Geochemistry, Isotope Analysis in Ecology, Marine and Coastal Ecosystems, Hydrology and Watershed Management Studies, Geology and Paleoclimatology Research, Fish Ecology and Management Studies, and Groundwater Flow and Contamination Studies.

Wassenaar has published extensively in several scientific journals. Frequent publication venues include:

  • Isotopes in Environmental and Health Studies
  • Rapid Communications in Mass Spectrometry
  • Scientific Reports
  • MethodsX
  • Hydrological Processes

Among their recent papers are:

  • "Global patterns of nitrate isotope composition in rivers and adjacent aquifers reveal reactive nitrogen cascading", 2021, Communications Earth & Environment
  • "Stable isotopes in global lakes integrate catchment and climatic controls on evaporation", 2021, Nature Communications
  • "Improved high-resolution global and regionalized isoscapes of δ18O, δ2H and d-excess in precipitation", 2021, Hydrological Processes
  • "Temperature and precipitation effects on the isotopic composition of global precipitation reveal long-term climate dynamics", 2021, Scientific Reports
  • "High spatial resolution prediction of tritium (3H) in contemporary global precipitation", 2022, Scientific Reports

Frequent co-authors collaborating with Wassenaar include:

  • Matthias Pilecky
  • Martin J. Kainz
  • Stefan Terzer-Wassmuth
  • Luis Araguás-Araguás
  • Lucilena Rebêlo Monteiro

Best Publications

  • Global application of stable hydrogen and oxygen isotopes to wildlife forensics.

    Gabriel J. Bowen;Leonard I. Wassenaar;Keith A. Hobson

  • Comparative equilibration and online technique for determination of non-exchangeable hydrogen of keratins for use in animal migration studies.

    L. I. Wassenaar;K. A. Hobson

  • Linking breeding and wintering grounds of neotropical migrant songbirds using stable hydrogen isotopic analysis of feathers.

    K. A. Hobson;Leonard I. Wassenaar

  • Evaluation of the origin and fate of nitrate in the Abbotsford Aquifer using the isotopes of15N and18O in NO3

    Leonard I. Wassenaar

  • Tracking animal migration with stable isotopes

    Keith A. Hobson;Leonard I. Wassenaar

  • Natal origins of migratory monarch butterflies at wintering colonies in Mexico: New isotopic evidence

    Leonard I. Wassenaar;Keith A. Hobson

  • Individual specialization and trophic adaptability of northern pike ( Esox lucius ): an isotope and dietary analysis

    Catherine P. Beaudoin;William M. Tonn;Ellie E. Prepas;Leonard I. Wassenaar

  • Effects of lipid extraction on stable carbon and nitrogen isotope analyses of fish tissues: potential consequences for food web studies

    M. A. Sotiropoulos;W. M. Tonn;L. I. Wassenaar

  • Influence of drinking water and diet on the stable-hydrogen isotope ratios of animal tissues

    Keith A. Hobson;Lisa Atwell;Leonard I. Wassenaar

  • Global isoscapes for δ 18 O and δ 2 H in precipitation: improved prediction using regionalized climatic regression models

    S. Terzer;L. I. Wassenaar;L. J. Araguás-Araguás;P. K. Aggarwal

  • Stable isotopes (δD and δ 13 C) are geographic indicators of natal origins of monarch butterflies in eastern North America

    Keith A. Hobson;Leonard I. Wassenaar;Orley R. Taylor

  • High Resolution Pore Water δ2H and δ18O Measurements by H2O(liquid)−H2O(vapor) Equilibration Laser Spectroscopy

    L.I. Wassenaar;M.J. Hendry;V.L. Chostner;G.P. Lis

  • Using stable hydrogen and oxygen isotope measurements of feathers to infer geographical origins of migrating European birds.

    Keith A. Hobson;Gabriel J. Bowen;Leonard I. Wassenaar;Yves Ferrand

  • Improved Method for Determining the Stable-Hydrogen Isotopic Composition (δD) of Complex Organic Materials of Environmental Interest

    Leonard I. Wassenaar;Keith A. Hobson

  • Linking hydrogen (δ2H) isotopes in feathers and precipitation: sources of variance and consequences for assignment to isoscapes.

    Keith A. Hobson;Steven L. Van Wilgenburg;Leonard I. Wassenaar;Keith W. Larson

  • A groundwater isoscape (δD, δ18O) for Mexico

    L.I. Wassenaar;S.L. Van Wilgenburg;K. Larson;K.A. Hobson

  • Tracking multi-generational colonization of the breeding grounds by monarch butterflies in eastern North America

    D. T. Tyler Flockhart;Leonard I. Wassenaar;Tara G. Martin;Keith A. Hobson

  • Stable isotopes as indicators of altitudinal distributions and movements in an Ecuadorean hummingbird community

    Keith A. Hobson;Len I. Wassenaar;Borja Milá;Irby Lovette

  • Effects of selected pharmaceuticals on riverine biofilm communities.

    John R Lawrence;George D.W Swerhone;Leonard I Wassenaar;Thomas R Neu

  • STABLE-CARBON AND HYDROGEN ISOTOPE RATIOS REVEAL BREEDING ORIGINS OF RED-WINGED BLACKBIRDS

    Leonard I. Wassenaar;Keith A. Hobson

Frequent Co-Authors

Keith A. Hobson
Keith A. Hobson University of Western Ontario
M. Jim Hendry
M. Jim Hendry University of Saskatchewan
Pradeep K. Aggarwal
Pradeep K. Aggarwal International Atomic Energy Agency
Robert G. Clark
Robert G. Clark University of Saskatchewan
Steven L. Van Wilgenburg
Steven L. Van Wilgenburg Government of Canada
Ramon Aravena
Ramon Aravena University of Waterloo
D. Ryan Norris
D. Ryan Norris University of Guelph
Gabriel J. Bowen
Gabriel J. Bowen University of Utah
John R. Lawrence
John R. Lawrence Environment and Climate Change Canada
Tyler B. Coplen
Tyler B. Coplen United States Geological Survey

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

If you are interested in studying Ecology and Evolution in the USA, exploring related online degrees can open versatile career options. Programs in environmental science, biology, and even some best online graphic design programs now incorporate scientific visualization skills that can complement your ecological studies.

Interdisciplinary learning is increasingly valued by employers. Selecting an online interdisciplinary studies degree can offer flexibility, and many institutions provide robust financial aid options to help manage costs.

Those interested in research or academic leadership might consider pursuing one of the best online master's in history programs with a focus on the evolution of science or environmental history, expanding expertise beyond natural sciences alone.

Additionally, for careers in information management or archiving scientific data, learning what schools offer library science degrees is worthwhile. Library science graduates are vital in both academic and research settings, including ecology and evolution studies.

Best Scientists Citing Leonard I. Wassenaar

Trending Scientists

Recently Published Articles