Latitudinal shift in the timing of flowering of tree species across tropical Africa: insights from field observations and herbarium collections
| Autor: | Fidèle Baya, Sylvie Gourlet-Fleury, Steven Janssens, Kasso Daïnou, Dakis-Yaoba Ouédraogo, Hans Beeckman, Jan J. Wieringa, Emilien Dubiez, Jean-Louis Doucet, Bhely Angoboy Ilondea, Adeline Fayolle, Piet Stoffelen, Olivier J. Hardy |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
herbarium specimen rainfall Species distribution F62 - Physiologie végétale - Croissance et développement Conditions météorologiques Biology 010603 evolutionary biology 01 natural sciences Latitude Lophira alata 03 medical and health sciences dry season Floraison Dry season medicine reproductive phenology Ecology Evolution Behavior and Systematics 030304 developmental biology flowering 0303 health sciences Précipitation Comportement reproductif Phenology Ecology Facteur du milieu Seasonality Climatic hinge medicine.disease Herbarium Spatial variability timber species Arbre pour bois de construction Longitude Biologie |
| Zdroj: | Journal of Tropical Ecology Journal of tropical ecology, 36 (4 |
| ISSN: | 1469-7831 0266-4674 |
| DOI: | 10.1017/s0266467420000103 |
| Popis: | Temporal and spatial patterns in flowering phenology were assessed for eight tropical African tree species. Specifically, the frequency and seasonality of flowering at seven sites in central Africa were determined using field data, graphical analysis and circular statistics. Additionally, spatial variation in the timing of flowering across species range was investigated using herbarium data, analysing the relative influence of latitude, longitude and timing of the dry season with a Bayesian circular generalized linear model. Annual flowering was found for 20 out of the 25 populations studied. For 21 populations located at the north of the climatic hinge flowering was occurring during the dry season. The analysis of herbarium collections revealed a significant shift in the timing of flowering with latitude for E. suaveolens, and with the timing of the dry season for M. excelsa (and to a lesser extent L. alata), with the coexistence of two flowering peaks near the equator where the distribution of monthly rainfall is bimodal. For the other species, none of latitude, longitude or timing of the dry season had an effect on the timing of flowering. Our study highlights the need to identify the drivers of the flowering phenology of economically important African tree species. SCOPUS: ar.j info:eu-repo/semantics/published |
| Databáze: | OpenAIRE |
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