Producción Científica Profesorado

SEED DISPERSAL OF BURSERA FAGAROIDES (BURSERACEAE): THE EFFECT OF LINKING ENVIRONMENTAL FACTORS



Ortiz Pulido, Raúl

2006

Ortiz-Pulido, R. y Rico-Gray, V. 2006. Seed dispersal of Bursera fagaroides (Burseraceae): the effect of linking environmental factors. Southwestern Naturalist 51:11-21. doi: http://dx.doi.org/10.1894/0038-4909(2006)51[11:SDOBFB]2.0.CO;2


Abstract


We studied the seed dispersal process of a population of Bursera fagaroides (Burseraceae) on the coast of the Gulf of Mexico by considering 1) all phases of the dispersal process (i.e., fruit removal, effect of seed passage through digestive tract, seed deposition, removal of seeds from the ground, germination, growth and survival of seedlings and adults, and seed set); 2) plant and animal components and their interaction; and 3) spatial variation in these components using different subpopulations. Hill aspect and surrounding microenvironment or habitat affected individuals of B. fagaroides, and this effect depended on life stage (seed, seedling, or adult). Seed germination was greater in moderately-shaded areas (below the perennial plant species Coccoloba barbadensis) than in relatively open sites (below B. fagaroides or on bare sand); seedlings grew less on sites in bright sunlight; adult individuals were not detected in highly-shaded places; and females inhabiting open sites (grassland) had more removed seeds than those of shaded areas (shrubland and dry forest). Vireo griseus and Dumetella carolinensis, the only species consuming fruits of B. fagaroides during our study, differed in their effect on seeds: seeds ingested by V. griseus did not germinate, whereas 17% of seeds ingested by D. carolinensis germinated. Additionally, even though both bird species preferred the tropical dry forest, their foraging behavior differed. Vireo griseus was mostly found at mid-canopy height in tree-dominated sites, and D. carolinensis used the understory of shrubby areas; B. fagaroides does not inhabit tree-dominated sites. Our results indicated that there was no best place for a seed to land. What is suitable for a seed might not be optimal for a fruiting plant. Thus, patterns of seed dispersal are almost certainly altered by processes that happen long after seed deposition.






Artículos relacionados

DISTRIBUCIÓN DE COLIBRÍES EN LA ZONA BAJA DEL CENTRO DE VERACRUZ, MÉXICO

Avifauna de la Reserva de la Biosfera Barranca de Metztitlán, Hidalgo, México

Patterns of resource tracking by avian frugivores at multiple spatial scales: two case studies on di...

Temporal-spatial segregation among hummingbirds foraging on honeydew in a temperate forest in Mexico

Frugivoría por Aves en un Paisaje Fragmentado: Consecuencias en la Dispersión de Semillas

Abundance of frugivorous birds and richness of fruit resource: is there a temporal relationship?

EXPLORANDO LA RELACIÓN ENTRE REGISTROS DE COLIBRÍES Y ABUNDANCIA DE FLORES CON ESCALAMIENTO ESPACIO-...

The effect of spatio-temporal variation in understanding the fruit crop size hypothesis

Influence of slope orientation on sex ratio and size distribution in a dioecious plant Bursera fagar...

UN PANORAMA BREVE DE LA HISTORIA DE LA ORNITOLOGÍA MEXICANA