Dendroecology as a Research Tool to Investigate Climate Change Resilience on Magnolia vovidesii, a Threatened Mexican Cloud Forest Tree Species of Eastern Mexico

Plastic Responses of Magnolia schiedeana Schltdl., a Relict-Endangered Mexican Cloud Forest Tree, to Climatic Events: Evidences from Leaf Venation and Wood Vessel Anatomy

“…Our results suggest that M. schiedeana's wood vessels showed a high plasticity of growth rings development during drought years (DY) and non-drought years (NDY) (Figure 6). Variation in Vein density (VD), Hydraulic diameter (Dh) and Percentage of conductivity area (PCA) in tree-ring width between DY and NDY in Magnolia schiedeana indicate a climatic adaptation corroborating the high plasticity already recorded in other Magnolia species [23,46]. We found that VD, D h , and PCA values were lower in El Gosco than Medio Monte (Figure 6A-C), implying a sheltering from drought events.…”

“…Our results show that M. schiedeana develops annual growth rings that can be used in wood anatomy and xylogenesis studies and are relevant to assess the plasticity of vessel-related drought events. Similar to M. vovidesii A. Vázquez, Domínguez-Yescas and L. Carvajal [23], Magnolia hypoleuca Siebold & Zucc. [67] and M. acuminata (L.) L. [68].…”

“…New lineages would be generated in the face of large-scale climate fluctuations, whereas intermediate levels of disturbance at local to regional scales would maximize genetic diversity [20]. Fog and mist in Mexican beech forests can also protect mid-canopy tree species from summer drought, increasing resilience and thus buffering the climate impact [23,44]. Nevertheless, the microenvironmental differences found among Magnolia populations (Figure 3) could be a consequence of habitat fragmentation and thus represent critical factors or opportunities to ensure future conservation efforts of the TMCF tree species [1,57].…”

“…This is consistent with the correlation with T min with current June and July (Figure 5B). Possibly, the fog/mist and canopy closure effects might play a key role during heat waves events [5], resulting in narrow rings and the leaf vein traits adaptations, during and after drought events [23]. The observed Magnolia growth was also negatively correlated with maximal temperatures from June to August, despite the absence of continuous precipitation during late December and January (winter), which affects the annual growth.…”

EFECTOS DE LA TEMPERATURA EN LA GERMINACIÓN DE SEMILLAS DE LAS ESPECIES Prosopis pallida (Humb. & Bonpl. ex Willd.) Kunth Y Prosopis juliflora (Sw.) DC.

“…Se supone que Argentina es el centro de origen del género Prosopis, y eso podría explicar el hecho de que este país tiene la mayor variabilidad de especies. Las especies de Prosopis son de gran valor ecológico y social, ya que proporcionan bienes como leña, alimentos, piensos para el ganado y medicinas, así como servicios que actúan como estabilizadores de cuencas hidrográficas y secuestradores de nitrógeno y carbono (Cangiano, Cendoya, Risio-Allione, & Bogino, 2020). No todas las especies de este género son de importancia económica, siendo muchas de ellas arbustos de valor limitado (Pasiecznik et al, 2001).…”