Bryophyte diversity by substrate in a lower montane humid forest, Filandia (Quindío), Colombia
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| Autores: | , , , |
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| Estado: | Versión publicada |
| Fecha de Publicación: | 2025 |
| Descripción: | Introduction: Bryophytes are poikilohydric organisms whose activity and persistence are controlled by fine-scale humidity and temperature. Substrate heterogeneity creates contrasting microhabitats that can filter composition and dominance within the same forest stand. Objective: To test whether bryophyte diversity and community structure differ among substrates (corticolous epiphytes, soil, decaying wood and epiphylls) in a lower montane humid forest of Filandia, Quindío, Colombia. Methods: Georeferenced sampling was conducted using 62 quadrats adjusted to the substrate type (50 × 20 cm for corticolous and lignicolous epiphytes, 50 × 50 cm for terricolous species, and 10 × 5 cm for epiphyllous species), and taxon cover was estimated. The temperature and relative humidity were measured in situ at the same substrate stratum on Saturdays between August and September 2025, during sampling sessions conducted between 8:30 a.m. and 12:00 p.m., with several successive measurements taken throughout each sampling session. Alpha diversity (Shannon, Simpson, and Chao-type estimators) and compositional differentiation were summarized using Bray–Curtis and Jaccard dissimilarities and Principal Coordinates Analysis (PCoA). Species importance was estimated using the Importance Value Index (IVI). Results: The microclimate was persistently humid, with low thermal variation (RH 80-93 %; 18.0-22.9 °C), and a negative humidity–temperature association was detected only on soil. The epiphytic substrate concentrated the highest richness and diversity (S = 37, H' = 3.289, 1–D = 0.948), whereas epiphyllous communities showed the lowest values (S = 6, H' = 1.677). Compositional comparisons showed high dissimilarity among substrates, with relative affinity between woody substrates (epiphytic–lignicolous) and clear separation of epiphylls in the ordination. Conclusions: Substrate contributes consistently to local variation in richness, diversity and composition of bryophyte assemblages in this lower montane forest. The differentiation observed among microhabitats supports stratified substrate-based sampling for monitoring and ecological assessment. |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español Inglés |
| OAI Identifier: | oai:portal.revistas.ucr.ac.cr:article/4634 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rrbt/article/view/4634 |
| Palabra clave: | microclimate community composition substrate heterogeneity Hill numbers epiphytism Tropical Andes microclima composición de comunidades heterogeneidad de sustratos números de Hill epifitismo Andes tropicales |