Assessing the drought effect on tree rings' width and xylem traits plasticity in Symplocos coccinea and S. speciosa: two rare and endemic Neotropical montane oak forest trees from eastern Mexico

Rodríguez‐Ramírez, Ernesto C.; Ruiz-Santiago, D.; Requena-Rojas, Edilson J.; Longhi-Santos, Tomaz; Suárez-Islas, A.; Luna‐Vega, Isolda

doi:10.1007/s00468-022-02371-4

Cited by 6 publications

(3 citation statements)

References 56 publications

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“…Similar results were found in other studies that compared rainfall differences in tropical dry forests [84,85]. Instead, differences are found when different types of forests are compared [37,[85][86][87].…”

Section: Low Variation In Wood Anatomical Traits Among Rainfall Gradi...supporting

confidence: 89%

“…The cell fraction presented low variation among sites for all species; statistically significant differences were found only in L. divaricatum for the vessel fraction, and their RDPI values were the lowest of all the traits studied. It is important to mention that statistically significant variation in fiber and parenchyma fractions has been found [37,82,86]. For example, in a study along an aridity gradient [82], in drought-avoidant species, the parenchyma fraction is higher at the driest sites, potentially offering greater control over the conduction network since a greater fraction of parenchyma offers support to the vessels against the scarcity of water and capacitance control.…”

Section: Low Variation In Wood Anatomical Traits Among Rainfall Gradi...mentioning

confidence: 99%

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Tree species differ in plant economic spectrum traits in the tropical dry forest of Mexico

Alvarado,

Terrazas

2023

PLoS ONE

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In tropical dry forests, studies on wood anatomical traits have concentrated mainly on variations in vessel diameter and frequency. Recent research suggests that parenchyma and fibers also play an important role in water conduction and in xylem hydraulic safety. However, these relationships are not fully understood, and wood trait variation among different functional profiles as well as their variation under different water availability scenarios have been little studied. In this work, we aim to (1) characterize a set of wood anatomical traits among six selected tree species that represent the economic spectrum of tropical dry forests, (2) assess the variation in these traits under three different rainfall regimes, and (3) determine the relationships between wood anatomical traits and possible functional trade-offs. Differences among species and sites in wood traits were explored. Linear mixed models were fitted, and model comparison was performed. Most variation occurred among species along the economic spectrum. Obligate deciduous, low wood density species were characterized by wood with wide vessels and low frequency, suggesting high water transport capacity but sensitivity to drought. Moreover, high cell fractions of carbon and water storage were also found in these tree species related to the occurrence of abundant parenchyma or septate fibers. Contrary to what most studies show, Cochlospermum vitifolium, a succulent tree species, presented the greatest variation in wood traits. Facultative deciduous, high wood density species were characterized by a sturdy vascular system that may favor resistance to cavitation and low reserve storage. Contrary to our expectations, variation among the rainfall regimes was generally low in all species and was mostly related to vessel traits, while fiber and parenchyma traits presented little variation among species. Strong functional associations between wood anatomical traits and functional trade-offs were found for the six tree species studied along the economic spectrum of tropical dry forests.

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Section: Low Variation In Wood Anatomical Traits Among Rainfall Gradi...supporting

confidence: 89%

Section: Low Variation In Wood Anatomical Traits Among Rainfall Gradi...mentioning

confidence: 99%

Tree species differ in plant economic spectrum traits in the tropical dry forest of Mexico

Alvarado,

Terrazas

2023

PLoS ONE

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“…and S . speciosa Hemsley (

\overset{R}{true}

= 0.39 and 0.37, respectively; Rodríguez‐Ramírez et al, 2022). Likewise, the expressed population signal (EPS) values (0.85 for Q .…”

Section: Discussionmentioning

confidence: 99%

Adaptation potential of Neotropical montane oaks to drought events: Wood anatomy sensitivity in Quercus delgadoana and Quercus meavei

Argüelles‐Marrón,

Meave,

Luna‐Vega

et al. 2023

Functional Ecology

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Climate and local water availability are major evolutionary drivers of adaptive variation and plasticity in the hydraulic architecture of Tropical Montane Cloud Forest (TMCF) tree species. Between‐year xylem vessel variability is key to understanding the adaptation potential of wood anatomy of trees to drought. How wood anatomical features have been influenced by the typical TMCF climate and how tree species persist in these environments remain open questions, particularly in the context of predicted extreme climate events in the future. Here, we evaluated the effects of changes in temperature, precipitation and evapotranspiration during drought events on ring‐width and anatomical vessel traits (hydraulic diameter, vessel density, vessel grouping index and vulnerability index) for two relict endemic and threatened oak species (Quercus delgadoana and Q. meavei) from a Mexican TMCF. The study species differed in their functional and ecological vessel anatomical traits, and their wood anatomical differences are related to specific environmental requirements. However, the ring‐width indices (RWIs) calculated for these species indicate that both have high resistance and recovery, and thus high resilience to drought events. Ring‐width and vessel functional traits show differences in the between‐year variability of xylem traits associated with the hydraulic efficiency of these oak species, which is crucial to understanding how they avoid drought‐induced embolism and cavitation in vessel conduits. These results provide evidence for the existence of specific hydraulic systems that determine functional wood anatomy in response to climatic variation and drought in the study species. Further research assessing the wood anatomical adaptation to different climatic variables and identifying the xylem functional traits that underlie these adaptations, along with the mechanisms allowing tree species persistence in these environments, is essential to gain insight into the responses of TMCF to future drought events. Read the free Plain Language Summary for this article on the Journal blog.

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Tracking climate vulnerability across spatial distribution and functional traits in Magnolia gentryi in the Peruvian tropical montane cloud forest

Rodríguez‐Ramírez,

Arroyo,

Ames‐Martínez

et al. 2024

American J of Botany

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PremiseUnderstanding the responses of functional traits in tree species to climate variability is essential for predicting the future of tropical montane cloud forest (TMCF) tree species, especially in Andean montane environments where fog pockets act as moisture traps.MethodsWe studied the distribution of Magnolia gentryi, measured its spatial arrangement, identified local hotspots, and evaluated the extent to which climate‐related factors are associated with its distribution. We then analyzed the variation in 13 functional traits of M. gentryi and the relationship with climate.ResultsAndean TMCF climatic factors constrain M. gentryi spatial distribution with significant patches or gaps that are associated with high precipitation and mean minimum temperature. The functional traits of M. gentryi are limited by the Andean TMCF climatic factors, resulting in reduced within‐species variation in traits associated with water deficit.ConclusionsThe association between functional traits and climate oscillation is crucial for understanding the growth conditions of relict‐endemic species and is essential for conservation efforts. Forest trait diversity and species composition change because of fluctuations in hydraulic safety‐efficiency gradients.

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Assessing the drought effect on tree rings' width and xylem traits plasticity in Symplocos coccinea and S. speciosa: two rare and endemic Neotropical montane oak forest trees from eastern Mexico

Cited by 6 publications

References 56 publications

Tree species differ in plant economic spectrum traits in the tropical dry forest of Mexico

Tree species differ in plant economic spectrum traits in the tropical dry forest of Mexico

Adaptation potential of Neotropical montane oaks to drought events: Wood anatomy sensitivity in Quercus delgadoana and Quercus meavei

Tracking climate vulnerability across spatial distribution and functional traits in Magnolia gentryi in the Peruvian tropical montane cloud forest

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