Relationship between vegetation structure and microenvironment in
 Fagus grandifolia
 subsp.
 mexicana
 forest relicts in Mexico

Rodríguez‐Ramírez, Ernesto C.; Sánchez–González, Arturo; Ángeles‐Pérez, Gregorio

doi:10.1093/jpe/rtw138

Cited by 15 publications

(18 citation statements)

References 31 publications

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“…Possibly, M. schiedeana has been affected by the microclimatic conditions of the Mexican beech forest structure (Fagus grandifolia subsp. mexicana, Q. delgadoana, Q. meavei and Q. trinitatis, and several tree fern species) and/or possible high genetic structure, affecting its climatic resilience [62]. We believe that there are specific climatic factors affecting TRWs' growth rates allowing the individual trees to adapt to these climatic fluctuations.…”

Section: Discussionmentioning

confidence: 96%

“…Our results suggest that droughts could not only affect Magnolia species' resilient ability to adapt to long drought-periods but also restrict them from remaining as a part of the TMCFs' structure. For instance, Magnolia schiedeana is a frequent element in Mexican beech forests [15,62], this could indicate a historical dependency to the specific microclimatic conditions given by this forest type that are essential to its establishment and survival [58,59]. Strong vessel plasticity from M. schiedeana, given drought events ( Figure 4), enhances the statement of its need for specific microclimatic.…”

Section: Discussionmentioning

confidence: 99%

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Drought Effects on Vessel Plasticity of Two Endemic Magnolia Species in the Tropical Montane Cloud Forests of Eastern Mexico

Rodríguez‐Ramírez¹,

Vázquez-García²,

Alcántara-Ayala³

et al. 2018

Preprint

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The distribution of Mexican Magnolia species´ occur under restricted climatic conditions. As many other tree species from the tropical montane cloud forests (TMCF), Magnolia species appear to be sensitive to drought. Through the use of dendrochronological techniques, this study aims to determine the climate influence on the vessel traits of M. vovidesii and M. schiedeana which are endangered tree species that are endemic to the Sierra Madre Oriental in eastern Mexico. Because most of the tree species in TMCFs are sensitive to climate fluctuations, it is necessary to investigate the differences in the climatic adaptability of the vessel architecture of these trees. This could allow us to further understand the potential peril of climate change on TMCFs. We compared vessel frequency, length and diameter in drought and non–drought years in two Mexican Magnolia species. We used tree–rings width and vessel traits to assess the drought effects on Magnolias’ diffuse–porous wood back to the year 1929. We obtained independent chronologies for M. vovidesii with a span of 75 years (1941–2016), while for M. schiedeana we obtained a span of 319 years (1697–2016). We found that temperature and precipitation are strongly associated with differences in tree–ring width (TRW) between drought and non–drought years. Our results showed anatomical differences in vessel trait response between these two Magnolia species to climatic variation. We suggest that our approach of combining dendroclimatic and anatomical techniques is a powerful tool to analyse anatomic wood plasticity to climatic variation in Magnolia species.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Drought Effects on Vessel Plasticity of Two Endemic Magnolia Species in the Tropical Montane Cloud Forests of Eastern Mexico

Rodríguez‐Ramírez¹,

Vázquez-García²,

Alcántara-Ayala³

et al. 2018

Preprint

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“…La Mojonera has one of the most extensive Mexican beech forests in Mexico (42.5 ha); it is the most studied and shows the least disturbance by human activities (Rowden et al 2004;Rodríguez-Ramírez et al 2013) S1). A more detailed description of plant species composition and structure in the studied forests can be found in Rodríguez-Ramírez et al (2016).…”

Section: Study Sitesmentioning

confidence: 99%

“…In this context, the structure and floristic composition of forest ecosystems are intimately related to microenvironmental factors such as proportion of mature healthy trees, canopy openness, soil type, pH, and moisture (Taugourdeau and Sabatier 2010;Peña et al 2011;Rodríguez-Ramírez et al 2016). The spatial distribution of seedlings is strongly correlated by the random opening and closure of the canopy, which produces micro-habitat heterogeneity (Meier et al 2010;Offord et al 2014;Barna and Bosela 2015).…”

Section: Introductionmentioning

confidence: 99%

Spatial patterns of Mexican beech seedlings (Fagus grandifolia subsp. mexicana (Martínez) A.E. Murray): influence of canopy openness and conspecific trees on recruitment mechanisms

Rodríguez‐Ramírez

Martínez-Falcón

Luna‐Vega

2018

Annals of Forest Science

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& Key message Recruitment strategies of Mexican beech seedlings depend on mother tree distribution and light incidence in early stages of development. Spatial patterns are also affected by the structure and composition of tree species within Mexican beech forests. & Context Canopy openness and conspecific trees play a key role in Mexican beech spatial distribution and might strongly influence ecosystem functioning in the Tropical Montane Cloud Forest. The observed relationship between diameter at breast height of conspecific trees and the spatial distribution of beech seedlings indicates that structure and composition of tree species are crucial for the establishment and survival of seedlings, providing protection during the first developmental stages. & Aims To describe the spatial patterns of beech seedlings' distribution after a masting event and to evaluate the association of these patterns with canopy openness, conspecific tree distribution, and occurrence of other canopy species. & Methods We sampled individual Mexican beech seedlings on two highly conserved beech forests. We selected 100 subplots (10 × 10 m) on each one to measure seedlings and spatial attributes. We counted the number of beech seedlings and number of mature trees species on each subplot. In addition, we measured the levels of canopy openness and the diameter at breast height for all mature trees in each subplot. Spatial pattern of beech seedlings and their association with adult trees and other species were examined. & Results Mexican beech seedlings showed significant pattern of spatial aggregation. Significant associations were found between beech seedlings, canopy openness, and beech tree adults, while significant disassociations exist among beech seedlings and other species of trees such as Quercus meavei, Q. delgadoana, Q. trinitatis, and Magnolia schiedeana. & Conclusion The presence of oak species and Magnolia schiedeana in the surroundings and the structure and composition within forests may play a key role in the maintenance of the specific micro-environmental conditions required by Mexican beech recruitment after a masting event.

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“…The geographic isolation of Mexican beech populations from those of F. grandifolia in the United States and Canada occurred approximately seven million years ago (late Miocene: Manos & Stanford 2001, Denk & Grimm 2009. This isolation led to morphological differentiation of leaves and beechnuts (Little 1965) and micro-ecological divergence among populations (Fang & Lechowicz 2006) promoting changes in the floristic composition of forests inhabited by Mexican beech (Rodríguez-Ramírez et al 2016). The biogeographic history of Fagus and its extensive anatomical records (i.e., pollen, wood, cupules, and leaves) are evidence of the great ecological success of the genus and reflect its wide-ranging distribution.…”

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confidence: 99%

Floral morphology and anatomy of Fagus grandifolia subsp. mexicana (Fagaceae), an endangered-relict tree of the Mexican montane cloud forest

2021

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Background: This study is the first to examine the inflorescence, and the staminate and pistillate flowers of the Mexican beech, an endangered-relict tropical montane cloud tree species. Questions: Are there morphological and anatomical differences in Mexican beech's inflorescence and flowers in comparison with other beech species worldwide? Study species: Fagus grandifolia subsp. mexicana (Martínez) A.E. Murray) Study site and dates: Five Mexican beech stands from eastern Mexico, early February to early March 2017 and 2020. Methods: 400 Mexican beech floral buds and immature pistillate and staminate flowers in anthesis were collected and processed by light microscopy analysis and the pollen by scanning electron microscopy. Results: We found floral morphology and anatomy differences of this southernmost American beech species regarding the New- and Old-World taxa. We found that the inflorescence morphology of the Mexican beech is similar to some Asian beeches such as F. hayatae subsp. pashanica, F. lucida and F. longipetiolata. Notwithstanding, the staminate and pistillate flowers' anatomy is similar to that of F. grandifolia from Canada and the United States of America, F. sylvatica from Europe and F. crenata from Japan. Conclusions: The inflorescence and floral anatomical and morphological differences can be explained by possible hybridizations. Since only the pistillate and staminate flowers of F. sylvatica and F. grandifolia have been studied in detail, morphological, molecular and ecological studies of the Asian beech species are needed to achieve a better understanding of the floral morphology and anatomical evolution of these species and their relationship with the Mexican beech.

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Relationship between vegetation structure and microenvironment in Fagus grandifolia subsp. mexicana forest relicts in Mexico

Cited by 15 publications

References 31 publications

Drought Effects on Vessel Plasticity of Two Endemic <em>Magnolia</em> Species in the Tropical Montane Cloud Forests of Eastern Mexico

Drought Effects on Vessel Plasticity of Two Endemic <em>Magnolia</em> Species in the Tropical Montane Cloud Forests of Eastern Mexico

Spatial patterns of Mexican beech seedlings (Fagus grandifolia subsp. mexicana (Martínez) A.E. Murray): influence of canopy openness and conspecific trees on recruitment mechanisms

Floral morphology and anatomy of Fagus grandifolia subsp. mexicana (Fagaceae), an endangered-relict tree of the Mexican montane cloud forest

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