Annual cycles are the most common reproductive strategy in African tropical tree communities

Adamescu Gabriela S., Plumptre Andrew J., Abernethy Katharine A., Polansky Leo, Bush Emma R., Chapman Colin A., Shoo Luke P., Fayolle Adeline, Janmaat Karline R.L., Robbins Marha M., Ndangalasi Henry J., Cordeiro Norbert J., Gilby Ian C., Wittig Roman M., Breuer Thomas, Breuer-Ndoundou Hockemba Mireille, Sanz Crickette, Morgan David B., Pusey Anne E., Mugerwa Badru, Gilagiza Baraka, Tutin Caroline E.G., Ewango Corneille, Sheil Douglas, Dimoto Edmond, Baya Fidèle, Bujo Flort, Ssali Frederik, Dikangadissi Jean-Thoussaint, Jeffery Kathryn J., Valenta Kim, White Lee, Masozera Michel, Wilson Michael L., Bitariho Robert, Ndolo Ebika Sydney T., Gourlet-Fleury Sylvie, Mulindahabi Felix, Beale Colin M.. 2018. Annual cycles are the most common reproductive strategy in African tropical tree communities. Biotropica, 50 (3) : pp. 418-430.

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Quartile : Q2, Sujet : ECOLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Abstract : We present the first cross‐continental comparison of the flowering and fruiting phenology of tropical forests across Africa. Flowering events of 5446 trees from 196 species across 12 sites and fruiting events of 4595 trees from 191 species across 11 sites were monitored over periods of 6 to 29 years and analyzed to describe phenology at the continental level. To study phenology, we used Fourier analysis to identify the dominant cycles of flowering and fruiting for each individual tree and we identified the time of year African trees bloom and bear fruit and their relationship to local seasonality. Reproductive strategies were diverse, and no single regular cycle was found in >50% of individuals across all 12 sites. Additionally, we found annual flowering and fruiting cycles to be the most common. Sub‐annual cycles were the next most common for flowering, whereas supra‐annual patterns were the next most common for fruiting. We also identify variation in different subsets of species, with species exhibiting mainly annual cycles most common in West and West Central African tropical forests, while more species at sites in East Central and East African forests showed cycles ranging from sub‐annual to supra‐annual. Despite many trees showing strong seasonality, at most sites some flowering and fruiting occurred all year round. Environmental factors with annual cycles are likely to be important drivers of seasonal periodicity in trees across Africa, but proximate triggers are unlikely to be constant across the continent.

Mots-clés Agrovoc : Arbre forestier, Phénologie, Floraison, Fructification

Mots-clés géographiques Agrovoc : Afrique

Mots-clés libres : Africa, Annual cycle, Flowers, Fruits, Phenology

Classification Agris : K01 - Forestry - General aspects
F63 - Plant physiology - Reproduction
F60 - Plant physiology and biochemistry

Champ stratégique Cirad : Axe 6 (2014-2018) - Sociétés, natures et territoires

Auteurs et affiliations

  • Adamescu Gabriela S., University of York (GBR) - auteur correspondant
  • Plumptre Andrew J., Wildlife Conservation Society (USA)
  • Abernethy Katharine A., University of Stirling (GBR)
  • Polansky Leo, Max Planck Institute for Evolutionary Anthropology (DEU)
  • Bush Emma R., University of Stirling (GBR)
  • Chapman Colin A., McGill University (CAN)
  • Shoo Luke P., University of Queensland (AUS)
  • Fayolle Adeline, GxABT (BEL)
  • Janmaat Karline R.L., Max Planck Institute for Evolutionary Anthropology (DEU)
  • Robbins Marha M., Max Planck Institute for Evolutionary Anthropology (DEU)
  • Ndangalasi Henry J., Université de Dar es Salaam (TZA)
  • Cordeiro Norbert J., Roosevelt University (USA)
  • Gilby Ian C., Arizona State University (USA)
  • Wittig Roman M., Max Planck Institute for Evolutionary Anthropology (DEU)
  • Breuer Thomas, Wildlife Conservation Society (USA)
  • Breuer-Ndoundou Hockemba Mireille, Wildlife Conservation Society (COD)
  • Sanz Crickette, Washington University (USA)
  • Morgan David B., Lester E. Fisher Center for the Study and Conservation of Apes (USA)
  • Pusey Anne E., Duke University (USA)
  • Mugerwa Badru, ITFC (UGA)
  • Gilagiza Baraka, Gombe Stream Research Centre Kigoma (TZA)
  • Tutin Caroline E.G., University of Stirling (GBR)
  • Ewango Corneille, Wildlife Conservation Society (COD)
  • Sheil Douglas, Norwegian University of Life Sciences (NOR)
  • Dimoto Edmond, Agence nationale des parcs nationaux (GAB)
  • Baya Fidèle, Ministère des eaux et forêts, chasses, pêches et tourisme (République centrafricaine) (CAF)
  • Bujo Flort, Wildlife Conservation Society (USA)
  • Ssali Frederik, ITFC (UGA)
  • Dikangadissi Jean-Thoussaint, Agence nationale des parcs nationaux (GAB)
  • Jeffery Kathryn J., University of Stirling (GBR)
  • Valenta Kim, McGill University (CAN)
  • White Lee, Agence nationale des parcs nationaux (GAB)
  • Masozera Michel, Wildlife Conservation Society (USA)
  • Wilson Michael L., University of Minnesota (USA)
  • Bitariho Robert, ITFC (UGA)
  • Ndolo Ebika Sydney T., Initiative des Champignons et des Plantes du Congo (COG)
  • Gourlet-Fleury Sylvie, CIRAD-ES-UPR BSef (FRA) ORCID: 0000-0002-1136-4307
  • Mulindahabi Felix, Wildlife Conservation Society (USA)
  • Beale Colin M., University of York (GBR)

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