2022
Benítez-Malvido, Julieta; Álvarez-Añorve, Mariana Y.; Ávila-Cabadilla, Luis D.; Pierro, Ana Ma González-Di; Zermeño-Hernández, Isela; Méndez-Toribio, Moisés; González-Rodríguez, Antonio; Lombera, Rafael
Phylogenetic and functional structure of tree communities at different life stages in tropical rain forest fragments Artículo de revista
En: Global Ecology and Conservation, vol. 36, 2022, ISSN: 23519894.
Resumen | Enlaces | Etiquetas: Fragmentation, Functional traits, Phylogenetic structure, Primates, Seed dispersal, Seed rain, Seedling bank, Tree species richness
@article{nokey,
title = {Phylogenetic and functional structure of tree communities at different life stages in tropical rain forest fragments},
author = {Julieta Benítez-Malvido and Mariana Y. Álvarez-Añorve and Luis D. Ávila-Cabadilla and Ana Ma González-Di Pierro and Isela Zermeño-Hernández and Moisés Méndez-Toribio and Antonio González-Rodríguez and Rafael Lombera},
doi = {10.1016/j.gecco.2022.e02113},
issn = {23519894},
year = {2022},
date = {2022-01-01},
journal = {Global Ecology and Conservation},
volume = {36},
publisher = {Elsevier B.V.},
abstract = {Tropical rain forest fragmentation is considered one of the principal drivers of biodiversity loss worldwide. Fragmentation and defaunation of tropical rain forests affect the maintenance of their biodiversity in a myriad of ways. Old-growth forest plant and animal species are more likely to suffer from local extinction, not only because fragments frequently represent low quality habitats but also because of the loss of biotic interactions such as seed dispersal. In this study, we evaluated the maintenance of tree species diversity in the face of habitat fragmentation in southern Mexico using different approaches. Firstly, we used community phylogeny at different tree life stages (i.e., seeds, seedlings and adults). Secondly, we categorised plant species in different life stages into functional groups according to seed size (small seeds < 1 cm length and large seeds > 1 cm length) and, finally, by dispersal syndrome (predominantly primate dispersed). We searched for three sites of continuous forest as experimental controls where two important seed dispersers coexist, the howler (Alouatta pigra) and spider (Ateles geoffroyi) monkeys, and six forest fragments of similar sizes (ca. 3–6 ha). Three fragments were occupied only by howler monkeys, and three had no primates. We compared entire assemblages as well as assemblages of small-seeded and large-seeded species separately to determine the phylogenetic structure and patterns of species richness and the density of adult trees (> 10 cm dbh), seedlings (10–100 cm tall) and seed assemblages. Fragments and continuous forest differed in taxonomic species richness and density at all life stages when large-seeded species mainly dispersed by primates were solely considered, with numbers in unoccupied fragments being consistently lower than in continuous forests and occupied fragments. Phylogenetic clustering occurred in all habitats and for all life stages, predominantly for the seedling stage, indicating that the understory community is assembled via environmental filtering (including both biotic and abiotic processes). Habitats occupied by primates tended to present a higher phylogenetic clustering than unoccupied fragments, suggesting that primates select phylogenetically-related species in their diets and, importantly, that these foraging behaviours influence seedling recruitment patterns. The loss of taxonomic and functional biodiversity and the non-random extinction of tree species principally dispersed by primates, represents part of the evolutionary history that is being lost throughout fragmentation.},
keywords = {Fragmentation, Functional traits, Phylogenetic structure, Primates, Seed dispersal, Seed rain, Seedling bank, Tree species richness},
pubstate = {published},
tppubtype = {article}
}
Hernández-Madrigal, Fátima; Contreras-Negrete, Gonzalo; Aguilar-Romero, Rafael; Pineda-García, Fernando; González-Rodríguez, Antonio
DIFFERENTIATION IN SEED MASS AND SEEDLING BIOMASS ALLOCATION IN PROSOPIS LAEVIGATA THROUGHOUT ITS DISTRIBUTION RANGE IN MEXICO IS ASSOCIATED TO WATER AVAILABILITY Artículo de revista
En: Botanical Sciences, vol. 100, iss. 2, pp. 274-290, 2022, ISSN: 20074476.
Resumen | Enlaces | Etiquetas: actual evapotranspiration, arid zones, Functional traits, germination
@article{nokey,
title = {DIFFERENTIATION IN SEED MASS AND SEEDLING BIOMASS ALLOCATION IN PROSOPIS LAEVIGATA THROUGHOUT ITS DISTRIBUTION RANGE IN MEXICO IS ASSOCIATED TO WATER AVAILABILITY},
author = {Fátima Hernández-Madrigal and Gonzalo Contreras-Negrete and Rafael Aguilar-Romero and Fernando Pineda-García and Antonio González-Rodríguez},
doi = {10.17129/botsci.2846},
issn = {20074476},
year = {2022},
date = {2022-01-01},
journal = {Botanical Sciences},
volume = {100},
issue = {2},
pages = {274-290},
publisher = {Sociedad Botanica de Mexico, A.C},
abstract = {Background: Seedling establishment depends on the quality of the seeds and environmental conditions. Differential biomass allocation in emergent seedlings probably constitutes a relevant adaptive response of populations along environmental gradients. Questions: Are there differences in seed mass and biomass allocation in seedlings among Prosopis laevigata populations? Is this variation correlated with environmental variables? Studied species: Prosopis laevigata (Humb. & Bonpl. ex Willd.) M.C.Johnst (Fabaceae). Study site and dates: Thirteen localities along the distribution of P. laevigata in México. From 2016 to 2020. Methods: Seeds were collected from four or five mother trees per locality. Seed mass (SM) was obtained in ten seeds per mother and six functional traits indicative of biomass allocation were measured in the seedlings after 10 days of germination. Population mean values were obtained for the six traits plus SM and subjected to a principal component analysis (PCA). Population scores on the first two axis of the PCA were regressed against environmental variables from the collection localities using a stepwise regression model. Results: Populations displayed functional variation congruent with alternative biomass allocation strategies. The conservative strategy was characterized by larger seeds and seedlings with denser tissues and a higher investment in root biomass, while the opposite characterized the acquisitive strategy. Actual evapotranspiration in May, isothermality and soil water content in February were environmental variables that significantly predicted population scores on the first two axes of the PCA. Conclusion: Water availability gradients influence seed mass and seedling biomass allocation variation among P. laevigata populations.},
keywords = {actual evapotranspiration, arid zones, Functional traits, germination},
pubstate = {published},
tppubtype = {article}
}
2014
Hernández-Calderón, Erasto; Méndez-Alonzo, Rodrigo; Martínez-Cruz, Juan; González-Rodríguez, Antonio; Oyama, Ken
Altitudinal changes in tree leaf and stem functional diversity in a semi-tropical mountain generic
2014.
Resumen | Enlaces | Etiquetas: Altitude, Community assembly, Community-weighted mean, Functional traits, Huber value, Mexico, Tree allometry, Tree height
@generic{Hernandez-Calderon2014,
title = {Altitudinal changes in tree leaf and stem functional diversity in a semi-tropical mountain},
author = {Erasto Hernández-Calderón and Rodrigo Méndez-Alonzo and Juan Martínez-Cruz and Antonio González-Rodríguez and Ken Oyama},
doi = {10.1111/jvs.12158},
issn = {16541103},
year = {2014},
date = {2014-01-01},
journal = {Journal of Vegetation Science},
volume = {25},
issue = {4},
pages = {955-966},
abstract = {Question: Along an altitudinal gradient of 2000 m in a semi-tropical mountain, we explored the relation between tree specific diversity and community functional composition by studying variations in tree allometry, stem and leaf functional traits, and their relationship with temperature and precipitation. Location: Tequila Volcano, Jalisco, Mexico (20°48′ N, 103°51′ W). Methods: We surveyed tree specific diversity, five forest structural parameters and six functional traits in ten horizontal transects (50-75 m in length) located every 200 m along a 2000-m gradient (from 800 to 2800 m a.s.l.). We calculated alpha and beta diversity, and quantified the community-weighted means for wood and bark density, Huber value (sapwood to leaf area ratio), leaf area, leaf dry mass content and leaf mass per unit area. The patterns of association were explored using Pearson correlations, and summarized using PCA. Results: Alpha diversity was independent of altitude, and species turnover was almost complete between consecutive transects. Altitude (and its associated abiotic factors, temperature and precipitation) were highly correlated with functional traits. Maximum tree height, total basal area and the community-weighted mean values for leaf mass per unit area, leaf dry mass content, and the Huber values were positively correlated with altitude, and the opposite was found for the number of basal stems. Stem and leaf trait values were correlated along the altitudinal gradient. Conclusions: Altitude imposes environmental filters at the community scale that determine a high species replacement. Stem and leaf traits were correlated along the gradient; trees at higher altitudes were taller with a single stem, higher density of wood and bark, and leaves with higher leaf mass per area and dry mass content than in the low-altitude sites. These results suggest the consistency of a fast-slow acquisitive trade-off across environments, tending to promote slow acquisition and high longevity at higher altitudes. © 2014 International Association for Vegetation Science.},
keywords = {Altitude, Community assembly, Community-weighted mean, Functional traits, Huber value, Mexico, Tree allometry, Tree height},
pubstate = {published},
tppubtype = {generic}
}