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Distribución diamétrica de la población de J. jaliscana en el municipio de Talpa de Allende. 1 = 2.5-11.64 cm, 2 = 11.64-20.79 cm, 3 = 20.79-29.93 cm, 4 = 29.93-39.07 cm, 5 = 39.07-48.21 cm, 6 = 48.21-57.36 cm, 7 = 57.36-66.50 cm.
Source publication
Antecedentes:
El conocimiento de los atributos estructurales y el hábitat de las especies son fundamentales para evaluar su estado de conservación y proponer acciones para su conservación y manejo.
Preguntas:
¿Cuáles son los atributos estructurales de la poblacional de J. jaliscana, las características de su hábitat y los factores ambientales que...
Citations
... It is also known that, when crowns limit their photosynthetic rates, cytokinins in the root stimulate the resprouting response [25]. This species is capable of repopulating post-fire areas, with a high tolerance for marginal conditions [26] (Table A2). However, severe and frequent fires can put it at risk [27]. ...
Despite recurring episodes of fire exacerbated by climate change, post-fire dynamics in trees remain to be fully understood. In a mixed forest in northern Mexico that experiences frequent fires, we aimed to determine how tree growth responds to surface fire by examining earlywood (EW) and latewood (LW) responsiveness, as well as their connection with canopy activity, using UAV-acquired NDVI data. We compared EW and LW growth from mini cores of burned and unburned trees (n = 100) across four species, correlating this with NDVI data from 33 UAV monthly flights at the individual tree level from 2021 to 2023. Our results identified Quercus durifolia Seemen as the species that presented the highest growth following exposure to surface fire. Arbutus arizonica (A. Gray) Sarg. was the species most affected by fire in terms of EW production immediately after burning but showed benefits in subsequent summers. Juniperus deppeana Steud. demonstrated adaptive plasticity by responding more quickly to fire, with notable growth in EW. Pinus engelmannii Carrière responded in 2023, and its NDVI was associated to the least extent with seasonal growth. Thus, there is an evident seasonal response in trees subjected to low-intensity fire, which can act to shape the stand habitat. However, there is a divergence in response between broadleaf and evergreen species that could be attributed to fire-adaptive traits and hydraulic strategies. Although combining the tree-ring data with the NDVI served to improve our understanding of the effects of fire, further research is required.
