Spatio-temporal variability of seed rain within an old-growth tropical rainforest in Los Tuxtlas, Mexico

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Abstract

Tropical forest structure and regeneration heavily rely on seed rain, as it determines the demographic potential of populations and constrains community dynamics. We assessed seed rain over two years in a one-hectare plot of rainforest at the Los Tuxtlas Station, Mexico. Seed-fall was sampled in 100 circular traps (50 cm diameter), arranged in a regular 10×10 grid, collected every 40 (±5) days from May 1981 to May 1983. We recorded a total of 72,318 seeds from 160 species, with an outstanding spatio-temporal variation (average density: 1,842 (±2,135 s.d.) seeds/m 2/year). The second year was more diverse (124 spp.) than the first (99 spp.), with only 39% of total species present in both years. The seed rain was dominated by small seeds (width 7 mm) were scarce (< 4% abundance). Zoochorous species were the most prominent (84% of total abundance and 68% of richness). Seed deposition was highly clustered within the plot. However, this was not related to the density of canopy foliage above each trap as expected. Approximately 40% of the species came from sources outside the plot, emphasizing the high mobility of plants and the influence of the surrounding landscape.
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Spatio-temporal variability of seed rain within an old-growth tropical rainforest in Los Tuxtlas, Mexico | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL Ecology and Evolution This is a preprint and has not been peer reviewed. Data may be preliminary. 12 May 2026 V1 Latest version Share on Spatio-temporal variability of seed rain within an old-growth tropical rainforest in Los Tuxtlas, Mexico Authors : S. Guevara Sada [email protected] , Francisco Laborde-Dovalí 0000-0001-5401-4182 [email protected] , Rosario Landgrave [email protected] , Graciela Sánchez Ríos [email protected] , and María Martínez [email protected] Authors Info & Affiliations https://doi.org/10.22541/authorea.15003026/v1 46 views 15 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Tropical forest structure and regeneration heavily rely on seed rain, as it determines the demographic potential of populations and constrains community dynamics. We assessed seed rain over two years in a one-hectare plot of rainforest at the Los Tuxtlas Station, Mexico. Seed-fall was sampled in 100 circular traps (50 cm diameter), arranged in a regular 10×10 grid, collected every 40 (±5) days from May 1981 to May 1983. We recorded a total of 72,318 seeds from 160 species, with an outstanding spatio-temporal variation (average density: 1,842 (±2,135 s.d.) seeds/m 2/year). The second year was more diverse (124 spp.) than the first (99 spp.), with only 39% of total species present in both years. The seed rain was dominated by small seeds (width 7 mm) were scarce (< 4% abundance). Zoochorous species were the most prominent (84% of total abundance and 68% of richness). Seed deposition was highly clustered within the plot. However, this was not related to the density of canopy foliage above each trap as expected. Approximately 40% of the species came from sources outside the plot, emphasizing the high mobility of plants and the influence of the surrounding landscape. Supplementary Material File (resumen_espaniol_guevaraetal.docx) resumen_espaniol_guevaraetal Download 14.13 KB File (therainoflife_vertical_infography.pdf) therainoflife_vertical_infography Download 1.06 MB File (db9d6e80-b0b1-45a2-89c4-003913206d15.pdf) db9d6e80-b0b1-45a2-89c4-003913206d15 Download 4.96 MB Information & Authors Information Version history V1 Version 1 12 May 2026 Collection Ecology and Evolution Authors Affiliations S. Guevara Sada [email protected] INECOL, Xalapa, Mexico, 91073 View all articles by this author Francisco Laborde-Dovalí 0000-0001-5401-4182 [email protected] INECOL, Xalapa, Mexico, 91073 View all articles by this author Rosario Landgrave [email protected] INECOL, Xalapa, Mexico, 91073 View all articles by this author Graciela Sánchez Ríos [email protected] INECOL, Xalapa, Mexico, 91073 View all articles by this author María Martínez [email protected] INECOL, Xalapa, Mexico, 91073 View all articles by this author Metrics & Citations Metrics Article Usage 46 views 15 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation S. Guevara Sada, Francisco Laborde-Dovalí, Rosario Landgrave, et al. Spatio-temporal variability of seed rain within an old-growth tropical rainforest in Los Tuxtlas, Mexico. Authorea . 12 May 2026. 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