Rethinking megafauna

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DOI

  • Marcos Moleón, CSIC, Universidad de Granada
  • ,
  • José A. Sánchez-Zapata, Miguel Hernández University
  • ,
  • José A. Donázar, CSIC
  • ,
  • Eloy Revilla, CSIC
  • ,
  • Berta Martín-López, Leuphana University of Lüneburg
  • ,
  • Cayetano Gutiérrez-Cánovas, Universitat Autònoma Barcelona
  • ,
  • Wayne M. Getz, UC-Berkeley, University of KwaZulu-Natal
  • ,
  • Zebensui Morales-Reyes, Miguel Hernández University
  • ,
  • Ahimsa Campos-Arceiz, University of Nottingham
  • ,
  • Larry B. Crowder, Stanford University
  • ,
  • Mauro Galetti
  • Manuela González-Suárez, University of Reading
  • ,
  • Fengzhi He, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Free University of Berlin
  • ,
  • Pedro Jordano, CSIC
  • ,
  • Rebecca Lewison, San Diego State University
  • ,
  • Robin Naidoo, WWF US
  • ,
  • Norman Owen-Smith, Witwatersrand University
  • ,
  • Nuria Selva, Polish Academy of Sciences
  • ,
  • Jens Christian Svenning
  • José L. Tella, CSIC
  • ,
  • Christiane Zarfl, University of Tübingen
  • ,
  • Sonja C. Jähnig, Leibniz-Institute of Freshwater Ecology and Inland Fisheries
  • ,
  • Matt W. Hayward, Bangor University, University of Pretoria, Nelson Mandela Metropolitan University, The University of Newcastle
  • ,
  • Søren Faurby, University of Gothenburg, Gothenburg Global Biodiversity Centre
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  • Nuria García, Complutense University
  • ,
  • Anthony D. Barnosky, Stanford University
  • ,
  • Klement Tockner, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Free University of Berlin, Austrian Science Fund (FWF)

Concern for megafauna is increasing among scientists and non-scientists. Many studies have emphasized that megafauna play prominent ecological roles and provide important ecosystem services to humanity. But, what precisely are 'megafauna'? Here, we critically assess the concept of megafauna and propose a goal-oriented framework for megafaunal research. First, we review definitions of megafauna and analyse associated terminology in the scientific literature. Second, we conduct a survey among ecologists and palaeontologists to assess the species traits used to identify and define megafauna. Our review indicates that definitions are highly dependent on the study ecosystem and research question, and primarily rely on ad hoc size-related criteria. Our survey suggests that body size is crucial, but not necessarily sufficient, for addressing the different applications of the term megafauna. Thus, after discussing the pros and cons of existing definitions, we propose an additional approach by defining two function-oriented megafaunal concepts: 'keystone megafauna' and 'functional megafauna', with its variant 'apex megafauna'. Assessing megafauna from a functional perspective could challenge the perception that there may not be a unifying definition of megafauna that can be applied to all eco-evolutionary narratives. In addition, using functional definitions of megafauna could be especially conducive to cross-disciplinary understanding and cooperation, improvement of conservation policy and practice, and strengthening of public perception. As megafaunal research advances, we encourage scientists to unambiguously define how they use the term 'megafauna' and to present the logic underpinning their definition.

OriginalsprogEngelsk
TidsskriftProceedings. Biological sciences
Vol/bind287
Nummer1922
Antal sider10
ISSN0962-8452
DOI
StatusUdgivet - 2020

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