World's Best Scientists 2026 revealed!

D-Index & Metrics

Plant Science and Agronomy

D-Index
42
Citations
9443
World Ranking
3379
National Ranking
33

Ecology and Evolution

D-Index
46
Citations
9949
World Ranking
4597
National Ranking
48

Overview

What is he best known for?

The fields of study he is best known for:

  • Ecology
  • Ecosystem
  • Habitat

His primary scientific interests are in Ecology, Grazing, Agronomy, Herbivore and Perennial plant. His Ecology study typically links adjacent topics like Biological dispersal. His Grazing research includes themes of Shrub and Density dependence.

His study in Agronomy is interdisciplinary in nature, drawing from both Acacia and Botany. As a part of the same scientific family, Timothy G. O’Connor mostly works in the field of Herbivore, focusing on Agroforestry and, on occasion, Woody cover. His Perennial plant research incorporates themes from Shrubland, Vegetation, Forb, Seasonality and Ephemeral key.

His most cited work include:

  • Dynamics of shrub encroachment in an African savanna: relative influences of fire, herbivory, rainfall and density dependence (608 citations)
  • ON THE RELEVANCE OF NONEQUILIBRIUM CONCEPTS TO ARID AND SEMIARID GRAZING SYSTEMS (453 citations)
  • Resource heterogeneity and ungulate population dynamics (257 citations)

What are the main themes of his work throughout his whole career to date?

Ecology, Grassland, Grazing, Vegetation and Agronomy are his primary areas of study. His study in Species richness, Herbivore, Woodland, Arid and Abundance falls within the category of Ecology. His Grassland research also works with subjects such as

  • Biodiversity, which have a strong connection to Environmental resource management and Habitat,
  • Climate change that intertwine with fields like Global biodiversity and Land use.

His studies in Grazing integrate themes in fields like Perennial plant, Agroforestry, Livestock and Biological dispersal. His Vegetation research focuses on Ordination and how it relates to Shrub. His Agronomy research is multidisciplinary, relying on both Acacia, Botany and Stocking.

He most often published in these fields:

  • Ecology (56.25%)
  • Grassland (32.29%)
  • Grazing (27.08%)

What were the highlights of his more recent work (between 2016-2021)?

  • Ecology (56.25%)
  • Grassland (32.29%)
  • Vegetation (26.04%)

In recent papers he was focusing on the following fields of study:

Timothy G. O’Connor mostly deals with Ecology, Grassland, Vegetation, Grazing and Biodiversity. The Species richness, Forb, Arid and Threatened species research Timothy G. O’Connor does as part of his general Ecology study is frequently linked to other disciplines of science, such as Persistence, therefore creating a link between diverse domains of science. His research in Grassland intersects with topics in Montane ecology, Edaphic, Ecosystem services, Climate change and Livestock.

His work on Fire ecology as part of general Vegetation research is frequently linked to Spatial variability, thereby connecting diverse disciplines of science. His Grazing research entails a greater understanding of Agronomy. His Agronomy research integrates issues from Stocking and Vegetation composition.

Between 2016 and 2021, his most popular works were:

  • Grasslands—more important for ecosystem services than you might think (79 citations)
  • Impact of sheep grazing intensity on vegetation at the Arid Karoo Stocking Rate Trial after 27 years, Carnarvon, South Africa (11 citations)
  • Planning for the Maintenance of Floristic Diversity in the Face of Land Cover and Climate Change (10 citations)

In his most recent research, the most cited papers focused on:

  • Ecology
  • Ecosystem
  • Biodiversity

His main research concerns Vegetation, Grassland, Grazing, Ecology and Woody plant. His Grassland research includes elements of Agriculture, Agricultural productivity, Livelihood and Ecosystem services. Grazing is a subfield of Agronomy that he studies.

His research investigates the connection between Agronomy and topics such as Abundance that intersect with problems in Biodiversity. All of his Ecology and Arid and Forb investigations are sub-components of the entire Ecology study. His work carried out in the field of Woody plant brings together such families of science as Vegetation composition, Soil texture, Soil water, Water content and Woodland.

Best Publications

  • Grasslands—more important for ecosystem services than you might think

    J. Bengtsson;J. Bengtsson;J. M. Bullock;B. Egoh;B. Egoh;C. Everson

  • Dynamics of shrub encroachment in an African savanna: relative influences of fire, herbivory, rainfall and density dependence

    K.G. Roques;T.G. O'Connor;A.R. Watkinson

  • ON THE RELEVANCE OF NONEQUILIBRIUM CONCEPTS TO ARID AND SEMIARID GRAZING SYSTEMS

    A. W. Illius;T. G. O’Connor

  • Bush encroachment in southern Africa: changes and causes

    Tim G O'Connor;James R Puttick;M Timm Hoffman

  • Resource heterogeneity and ungulate population dynamics

    A. W. Illius;T. G. O'Connor

  • The influence of grazing on seed production and seed banks of some African savanna grasslands

    T. G. O'connor;G. A. Pickett

  • Effect of stocking rate and rainfall on rangeland dynamics and cattle performance in a semi‐arid savanna, South Africa

    R.W.S. Fynn;T.G. O'Connor

  • Influence of precipitation and species composition on phytomass of a semi‐arid African grassland

    T. G. O'Connor;L. M. Haines;H. A. Snyman

  • LOCAL EXTINCTION IN PERENNIAL GRASSLANDS: A LIFE-HISTORY APPROACH

    T. G. O'connor

  • A functional hypothesis of the threat of local extirpation of woody plant species by elephant in Africa

    Timothy G. O’Connor;Peter S. Goodman;Bruce Clegg

  • Vegetation Changes (1949-71) in a Semi-Arid, Grassy Dwarf Shrubland in the Karoo, South Africa: Influence of Rainfall Variability and Grazing by Sheep

    T. G. O'connor;P. W. Roux

  • Composition and population responses of an African savanna grassland to rainfall and grazing

    T.G. O'Connor

  • Acacia karroo invasion of grassland: environmental and biotic effects influencing seedling emergence and establishment.

    T. G. O'Connor

  • Burning causes long-term changes in soil organic matter content of a South African grassland

    R.W.S. Fynn;R.J. Haynes;T.G. O'Connor

  • Growth, biomass estimates, and charcoal production of Acacia drepanolobium in Laikipia, Kenya

    B.D Okello;T.G O’Connor;T.P Young

  • Synthesis of field experiments concerning the grass layer in the savanna regions of southern Africa

    TG O'Connor

  • Systematic land-cover change in KwaZulu-Natal, South Africa: Implications for biodiversity.

    Debbie Jewitt;Debbie Jewitt;Peter S. Goodman;Peter S. Goodman;Barend F.N. Erasmus;Timothy G. O'Connor

  • Influence of land use on plant community composition and diversity in Highland Sourveld grassland in the southern Drakensberg, South Africa.

    T. G. O'connor

  • Elephant utilization of Colophospermum mopane: possible benefits of hedging

    J. J. Smallie;T. G. O'connor

  • Transformation of a savanna grassland by drought and grazing

    T.G. O'Connor

  • Determinants of community organization of a South African mesic grassland

    Richard W.S. Fynn;Timothy G. O'Connor

  • Review Paper Bush encroachment in southern Africa: changes and causes

    Tim G O’Connor;James R Puttick;M Timm Hoffman

Frequent Co-Authors

Ed T.F. Witkowski
Ed T.F. Witkowski University of the Witwatersrand
Kevin P. Kirkman
Kevin P. Kirkman University of KwaZulu-Natal
Andrew W. Illius
Andrew W. Illius University of Edinburgh
Jan Bengtsson
Jan Bengtsson Swedish University of Agricultural Sciences
Regina Lindborg
Regina Lindborg Stockholm University
Patrick J. O’Farrell
Patrick J. O’Farrell University of Cape Town
Benis Egoh
Benis Egoh University of California, Irvine
Suzanne J. Milton
Suzanne J. Milton University of Cape Town
Sally Archibald
Sally Archibald University of the Witwatersrand
Richard J. Haynes
Richard J. Haynes University of Queensland

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