2011
Cuevas-Reyes, Pablo; Oyama, Ken; González-Rodríguez, Antonio; Fernandes, G. Wilson; Mendoza-Cuenca, Luis
Contrasting herbivory patterns and leaf fluctuating asymmetry in Heliocarpus pallidus between different habitat types within a Mexican tropical dry forest Artículo de revista
En: Journal of Tropical Ecology, vol. 27, iss. 4, pp. 383-391, 2011, ISSN: 14697831.
Resumen | Enlaces | Etiquetas: Fluctuating asymmetry, geometric morphometrics, Herbivory, leaf size, tropical dry forest
@article{Cuevas-Reyes2011,
title = {Contrasting herbivory patterns and leaf fluctuating asymmetry in Heliocarpus pallidus between different habitat types within a Mexican tropical dry forest},
author = {Pablo Cuevas-Reyes and Ken Oyama and Antonio González-Rodríguez and G. Wilson Fernandes and Luis Mendoza-Cuenca},
doi = {10.1017/S026646741100006X},
issn = {14697831},
year = {2011},
date = {2011-01-01},
journal = {Journal of Tropical Ecology},
volume = {27},
issue = {4},
pages = {383-391},
abstract = {Leaf fluctuating asymmetry (FA) is considered an important indicator of environmentally induced stress in plants, but the relationship between herbivory and FA levels is not clear. In this study we compared leaf size and shape, leaf area consumed by herbivorous insects, and FA levels between individuals of Heliocarpus pallidus (Tiliaceae) from two adjacent and contrasting habitat types (deciduous and riparian) in the Chamela-Cuixmala tropical dry-forest biosphere reserve. Ten individuals of H. pallidus were collected in each habitat type. Leaf shape was assessed using geometric morphometric techniques. Results indicated statistically significant differences in leaf shape between individuals from the two habitat types. In individuals from the riparian habitat leaf area (mean = 42.3 ± 1.2 cm2), herbivory levels (mean = 25.5% ± 1.8%) and FA levels (mean = 0.38 ± 0.04 cm) were significantly higher than in individuals from the deciduous habitat (17.2 ± 3.5 cm2; 9.6% ± 1.0% and 0.18 ± 0.04 cm, respectively). Within habitats, significant correlations were found between total leaf area and percentage leaf area removed by insects (R2 = 0.92 in riparian habitats},
keywords = {Fluctuating asymmetry, geometric morphometrics, Herbivory, leaf size, tropical dry forest},
pubstate = {published},
tppubtype = {article}
}
Leaf fluctuating asymmetry (FA) is considered an important indicator of environmentally induced stress in plants, but the relationship between herbivory and FA levels is not clear. In this study we compared leaf size and shape, leaf area consumed by herbivorous insects, and FA levels between individuals of Heliocarpus pallidus (Tiliaceae) from two adjacent and contrasting habitat types (deciduous and riparian) in the Chamela-Cuixmala tropical dry-forest biosphere reserve. Ten individuals of H. pallidus were collected in each habitat type. Leaf shape was assessed using geometric morphometric techniques. Results indicated statistically significant differences in leaf shape between individuals from the two habitat types. In individuals from the riparian habitat leaf area (mean = 42.3 ± 1.2 cm2), herbivory levels (mean = 25.5% ± 1.8%) and FA levels (mean = 0.38 ± 0.04 cm) were significantly higher than in individuals from the deciduous habitat (17.2 ± 3.5 cm2; 9.6% ± 1.0% and 0.18 ± 0.04 cm, respectively). Within habitats, significant correlations were found between total leaf area and percentage leaf area removed by insects (R2 = 0.92 in riparian habitats
2008
Uribe-Salas, Dolores; Sáenz-Romero, Cuauhtémoc; González-Rodríguez, Antonio; Téllez-Valdéz, Oswaldo; Oyama, Ken
Foliar morphological variation in the white oak Quercus rugosa Née (Fagaceae) along a latitudinal gradient in Mexico: Potential implications for management and conservation Artículo de revista
En: Forest Ecology and Management, vol. 256, iss. 12, pp. 2121-2126, 2008, ISSN: 03781127.
Resumen | Enlaces | Etiquetas: Annual moisture index, Foliar morphological variation, leaf size, Phenotypic cline, Quercus rugosa, Seed zoning
@article{Uribe-Salas2008,
title = {Foliar morphological variation in the white oak Quercus rugosa Née (Fagaceae) along a latitudinal gradient in Mexico: Potential implications for management and conservation},
author = {Dolores Uribe-Salas and Cuauhtémoc Sáenz-Romero and Antonio González-Rodríguez and Oswaldo Téllez-Valdéz and Ken Oyama},
doi = {10.1016/j.foreco.2008.08.002},
issn = {03781127},
year = {2008},
date = {2008-01-01},
journal = {Forest Ecology and Management},
volume = {256},
issue = {12},
pages = {2121-2126},
abstract = {Quercus rugosa Nee (section Quercus) has a distribution from the southern United States to Honduras. This study characterized leaf variation across the whole distribution of the species in Mexico. Ten foliar morphometric characters were scored in each of 241 individuals from 25 localities. A principal component analysis resolved four principal components (PCs) that explained 76.4% of the total variation. A nested analysis of variance revealed significant differences among populations (29.2% average contribution to total variance for the four PCs) and among-trees within populations (39.2%), while 31.6% was due to intra-individual variation. For the first PC (related to leaf size), 52.1% resulted from among population differences. This variation was negatively correlated with latitude (r = -0.86; P < 0.0001), indicating a steep clinal reduction in leaf size from south to north. Mean annual precipitation and an annual aridity index also significantly decreased and increased with latitude, respectively. It is suggested that the morphological cline is the result of plastic and/or adaptive responses to environmental conditions, and indicative of further ecophysiological latitudinal differences among Q. rugosa populations. Additionally, we estimated the magnitude of the least significant difference among populations for the first PC and translated it into a delineation of six latitudinal zones (each with a width of 2°30′), to be considered as preliminary zones for the movement of Q. rugosa seeds with management and conservation purposes, including management in response to global warming. © 2008 Elsevier B.V. All rights reserved.},
keywords = {Annual moisture index, Foliar morphological variation, leaf size, Phenotypic cline, Quercus rugosa, Seed zoning},
pubstate = {published},
tppubtype = {article}
}
Quercus rugosa Nee (section Quercus) has a distribution from the southern United States to Honduras. This study characterized leaf variation across the whole distribution of the species in Mexico. Ten foliar morphometric characters were scored in each of 241 individuals from 25 localities. A principal component analysis resolved four principal components (PCs) that explained 76.4% of the total variation. A nested analysis of variance revealed significant differences among populations (29.2% average contribution to total variance for the four PCs) and among-trees within populations (39.2%), while 31.6% was due to intra-individual variation. For the first PC (related to leaf size), 52.1% resulted from among population differences. This variation was negatively correlated with latitude (r = -0.86; P < 0.0001), indicating a steep clinal reduction in leaf size from south to north. Mean annual precipitation and an annual aridity index also significantly decreased and increased with latitude, respectively. It is suggested that the morphological cline is the result of plastic and/or adaptive responses to environmental conditions, and indicative of further ecophysiological latitudinal differences among Q. rugosa populations. Additionally, we estimated the magnitude of the least significant difference among populations for the first PC and translated it into a delineation of six latitudinal zones (each with a width of 2°30′), to be considered as preliminary zones for the movement of Q. rugosa seeds with management and conservation purposes, including management in response to global warming. © 2008 Elsevier B.V. All rights reserved.