Título
Seasonal and successional dynamics of size-dependent plant demographic rates in a tropical dry forest
Autor
Irving Saenz Pedroza
Richard Feldman
Casandra Reyes García
Jorge Arturo Meave del Castillo
Luz María del Carmen Calvo Irabien
FILOGONIO MAY PAT
JUAN MANUEL DUPUY RADA
Nivel de Acceso
Acceso Abierto
Referencia de datos
datasetDOI/http://doi.org/10.7717/peerj.9636
Materias
CHRONOSEQUENCE RESAMPLING - (AUTORES) PLANT AND SPECIES DENSITY - (AUTORES) RECRUITMENT - (AUTORES) MORTALITY - (AUTORES) DRY SEASON - (AUTORES) RAINY SEASON - (AUTORES) SECONDARY FOREST SUCCESSION - (AUTORES) COMPETITION - (AUTORES) ENVIRONMENTAL FILTERING - (AUTORES) BIOLOGÍA Y QUÍMICA - (CTI) CIENCIAS DE LA VIDA - (CTI) BIOLOGÍA VEGETAL (BOTÁNICA) - (CTI) DESARROLLO VEGETAL - (CTI) DESARROLLO VEGETAL - (CTI)
Resumen o descripción
Tropical forests are globally important for biodiversity conservation and climate change mitigation but are being converted to other land uses. Conversion of seasonally dry tropical forests (SDTF) is particularly high while their protection is low. Secondary succession allows forests to recover their structure, diversity and composition after conversion and subsequent abandonment and is influenced by demographic rates of the constituent species. However, how these rates vary between seasons for different plant sizes at different successional stages in SDTF is not known. The effect of seasonal drought may be more severe early in succession, when temperature and radiation are high, while competition and density-dependent processes may be more important at later stages, when vegetation is tall and dense. Besides, the effects of seasonality and successional stage may vary with plant size. Large plants can better compete with small plants for limiting resources and may also have a greater capacity to withstand stress. Weasked how size-dependent density, species density, recruitment andmortality varied between seasons and successional stages in a SDTF. We monitored a chronosequence in Yucatan, Mexico, over six years in three 0.1 ha plots in each of three successional stages: early (3 5 years-old), intermediate (18 20 years-old) and advanced (>50 years-old). Recruitment, mortality and species gain and loss rates were calculated from wet and dry season censuses separately for large (diameter > 5 cm) and small (1 5 cm in diameter) plants. We used linear mixed-effects models to assess the effects of successional stage, seasonality and their changes through time on demographic rates and on plant and species density. Seasonality affected demographic rates and density of large plants, which exhibited high wet-season recruitment and species gain rates at the early stage and high wet-season mortality at the intermediate stage, resulting in an increase in plant and species density early in succession followed by a subsequent stabilization. Small plant density decreased steadily after only 5 years of land abandonment, whereas species density increased with successional stage. A decline in species dominance may be responsible for these contrasting patterns. Seasonality, successional stage and their changes through time had a stronger influence on large plants, likely because of large among-plot variation of small plants. Notwithstanding the short duration of our study.
Fecha de publicación
2020
Tipo de publicación
Artículo
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Fuente
PeerJ 8:e9636 http://doi.org/10.7717/peerj.9636
Idioma
Inglés
Sugerencia de citación
Saenz-Pedroza I, Feldman R, Reyes-García C, Meave JA, Calvo-Irabien LM, May-Pat F, Dupuy JM. 2020. Seasonal and successional dynamics of size-dependent plant demographic rates in a tropical dry forest. PeerJ 8:e9636 http://doi.org/10.7717/peerj.9636
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Repositorio Institucional CICY
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