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<p><i>Magnolia calimaensis</i> is an endemic tree from the central Chocó region in Colombia. It is classified as Critically Endangered, with fewer than 100 individuals remaining in an estimated distribution area of less than 50&#xa0;km². This research aimed to evaluate the population structure and reproductive biology of the species, through the census and the observation of the individuals recorded. Three locations within its proposed distribution range in the departments of Chocó and Valle del Cauca were surveyed, where dasometric variables were measured, and the presence of reproductive structures was recorded to describe the floral opening process and insect-plant interactions. Thirty-eight individuals were localised in a gregarious dispersal pattern in two geographic populations. Their dimensions oscillate between 6 up to 20&#xa0;m height and 3 up to 50&#xa0;cm diameter at breast height. The species blooms between November and March in a evening-night model and a protogynous cycle of 2 days, where it is presumed that beetles of the Nitidulidae family carry out the pollination. The distribution range of <i>M. calimaensis</i> exclusively includes the Bajo Calima and Bahía Málaga localities in Valle del Cauca department; in the latter, 23% of the individuals were recorded near Urámba Bahía Málaga National Natural Park and La Sierpe Regional Natural Park. Basic information about the autoecology of <i>M. calimaensis</i> is provided, encouraging the scientific community and competent entities to take measures for the management and conservation of the species.</p>

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Population structure and reproductive biology of Magnolia calimaensis an endemic species from the central Chocó region

  • 期刊论文

  • 发表日期：

    2026年2月5日

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  • Gloria D. González-Zúñiga,
  • Cristian Rodas-Ensuncho,
  • Marino Ramos,
  • Juan Pablo Cuevas-González,
  • Sebastián Quimbayo-Díaz,
  • Fernando Fernández-Méndez,
  • Kelly T. Bocanegra-González

摘要

Magnolia calimaensis is an endemic tree from the central Chocó region in Colombia. It is classified as Critically Endangered, with fewer than 100 individuals remaining in an estimated distribution area of less than 50 km². This research aimed to evaluate the population structure and reproductive biology of the species, through the census and the observation of the individuals recorded. Three locations within its proposed distribution range in the departments of Chocó and Valle del Cauca were surveyed, where dasometric variables were measured, and the presence of reproductive structures was recorded to describe the floral opening process and insect-plant interactions. Thirty-eight individuals were localised in a gregarious dispersal pattern in two geographic populations. Their dimensions oscillate between 6 up to 20 m height and 3 up to 50 cm diameter at breast height. The species blooms between November and March in a evening-night model and a protogynous cycle of 2 days, where it is presumed that beetles of the Nitidulidae family carry out the pollination. The distribution range of M. calimaensis exclusively includes the Bajo Calima and Bahía Málaga localities in Valle del Cauca department; in the latter, 23% of the individuals were recorded near Urámba Bahía Málaga National Natural Park and La Sierpe Regional Natural Park. Basic information about the autoecology of M. calimaensis is provided, encouraging the scientific community and competent entities to take measures for the management and conservation of the species.