3 Works

Wild herbivores enhance resistance to invasion by exotic cacti in an African savanna

Harry Wells, Ramiro Crego, Jesse Alston, S. Kimani Ndung'u, Leo Khasoha, Courtney Reed, Abdikadir Hassan, Samson Kurukura, Jackson Ekadeli, Mathew Namoni, Peter Stewart, Duncan Kimuyu, Amelia Wolf, Truman Young, Tyler Kartzinel, Todd Palmer, Jacob Goheen & Robert Pringle
1. Whether wild herbivores confer biotic resistance to invasion by exotic plants remains a key question in ecology. There is evidence that wild herbivores can impede invasion by exotic plants, but it is unclear whether and how this generalises across ecosystems with varying wild herbivore diversity and functional groups of plants, particularly over long-term (decadal) time frames. 2. Using data from three long-term (13- to 26-year) exclosure experiments in central Kenya, we tested the effects...

Global biogeography of warning colouration in the butterfly Danaus chrysippus

Wanzhen Liu, David A. S. Smith, Gayatri Raina, Rowan Stanforth, Ivy Ng’Iru, Piera Ireri, Dino J. Martins, Ian J. Gordon & Simon H. Martin
Warning colouration provides a textbook example of natural selection, but the frequent observation of polymorphism in aposematic species presents an evolutionary puzzle. We investigated biogeography and polymorphism of warning patterns in the widespread butterfly Danaus chrysippus using records from citizen science (n=5467), museums (n=8864), and fieldwork (n=2586). We find that polymorphism in three traits controlled by known mendelian loci is extensive. Broad allele frequency clines, hundreds of km wide, suggest a balance between long-range dispersal...

The generality of cryptic dietary niche differences in diverse large-herbivore assemblages

Robert Pringle, Johan Pansu, Matthew Hutchinson, T. Michael Anderson, Mariska Te Beest, Colleen Begg, Keith Begg, Aurelie Bonin, Lackson Chama, Simon Chamaillé-Jammes, Eric Coissac, Joris Cromsigt, Margaret Demmel, Jason Donaldson, Jennifer Guyton, Christina Hansen, Christopher Imakando, Azwad Iqbal, Davis Kalima, Graham Kerley, Samson Kurukura, Marietjie Landman, Ryan Long, Isaack Munuo, Ciara Nutter … & Tyler Kartzinel
Ecological niche differences are necessary for stable species coexistence but are often difficult to discern. Models of dietary niche differentiation in large mammalian herbivores invoke the quality, quantity, and spatiotemporal distribution of plant tissues and growth-forms but are agnostic towards food-plant species identity. Empirical support for these models is variable, suggesting that additional mechanisms of resource partitioning may be important in sustaining large-herbivore diversity in African savannas. We used DNA metabarcoding to conduct a taxonomically...

Registration Year

  • 2022
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Resource Types

  • Dataset
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Affiliations

  • Mpala Research Center and Wildlife Foundation
    3
  • Princeton University
    2
  • Brown University
    2
  • University of Rwanda
    1
  • The University of Texas at Austin
    1
  • University of Wyoming
    1
  • University of Edinburgh
    1
  • Durham University
    1
  • Indian Institute of Science Education and Research Mohali
    1
  • Wake Forest University
    1