Warming effects on tree-ring variables in P. hartwegii Lindl. at the extremes of its natural elevational distribution in central Mexico

Carrillo-Arizmendi, L.; Pérez-Suárez, Marlín; Vargas-Hernández, J. Jesús; Rozenberg, Philippe; Martínez-Campos, A.R.

doi:10.1016/j.agrformet.2022.109109

Cited by 5 publications

(3 citation statements)

References 70 publications

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“…These temperature increases seem to be causing a devitalization effect on P. hartwegii populations, particularly pronounced at the lower distribution limit. This weakening effect was investigated by analyzing tree-ring variables of this species in the same region of the country, revealing a decrease in growth rate (less annual ring width) at the low altitudinal limit of P. hartwegii [85]. In addition, the PDSI analysis revealed an intensification of droughts in the study area.…”

Section: Discussionmentioning

confidence: 96%

“…For example, Ricker et al [89] developed models that predicted a 10.6% decrease in the relative growth of P. hartwegii as a result of a 0.6 • C temperature increase. Carrillo-Arizmendi et al [85] analyzed the dendrochronological series of P. hartwegii and concluded that global warming appears to be the main driver of variation in the radial growth of this tree species, with warning signs were observed at the lower extreme of its distribution gradient. Low NDVI and LCI values at lower altitudes suggest a process of forest devitalization expressed as a decrease in photosynthetic activity.…”

Section: Discussionmentioning

confidence: 99%

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Analysis of the Vigor of Pinus hartwegii Lindl. along an Altitudinal Gradient Using UAV Multispectral Images: Evidence of Forest Decline Possibly Associated with Climatic Change

Gallardo-Salazar

Lindig‐Cisneros

López-Toledo

et al. 2023

Forests

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Future climate forecasts predict major changes that will have negative impacts on the distribution, abundance, and dynamics of forest ecosystems. In Mexico, there is evidence of symptoms of massive forest decline; however, there is no consensus in terms of attributing these symptoms to climate change. This study aimed to provide evidence of forest decline possibly associated with climatic change in the highland pine (Pinus hartwegii Lindl.) populations of the Nevado de Toluca Flora and Fauna Protection Area. Using unmanned aerial vehicles (UAV) equipped with multispectral sensors, the study applied digital photogrammetry techniques, automated tree crown detection algorithms, and calculation of the normalized difference vegetation index (NDVI) and leaf chlorophyll index (LCI) to assess forest health across an altitudinal transect (from 3300 m to the timberline at 4040 m elevation). Climate analysis was conducted with TerraClimate data using mean annual temperature (MAT), April temperature, and Palmer Drought Severity Index (PDSI) from the studied altitudinal transect and its xeric limit. We found that lower altitude populations had significantly higher stress levels, indicating forest decline phenomena, while intermediate altitude populations showed greater vigor of the detected trees. Statistically significant differences in the NDVI and LCI values along the altitudinal gradient provided evidence of forest decline in terms of forest vigor and productivity, with the greatest disturbance found at the lower altitude of the examined forest species. The analysis of the climatic data revealed an increase in April temperature +1.4 °C of the xeric limit of the transect (low altitude) when comparing the reference period, 1961–1990 (mean: 12.17 °C), with the decade prior to our study (2011–2020; mean: 13.57 °C). This would be equivalent to an upward shift in elevation of 280 m of the xeric limit. In addition, the PDSI analysis revealed that droughts are becoming increasingly intense at a rate of 0.06 PDSI units per decade, with greater intensity in the last five years. These findings highlight the negative impacts of climate change on forest ecosystems and the urgent need for alternative forest management and conservation practices to increase resilience and adaptation in the temperate forests of Mexico. This study sets a precedent for further research to improve our understanding of the impacts of climate change on forest ecosystems and the development of sustainable management practices.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Analysis of the Vigor of Pinus hartwegii Lindl. along an Altitudinal Gradient Using UAV Multispectral Images: Evidence of Forest Decline Possibly Associated with Climatic Change

Gallardo-Salazar

Lindig‐Cisneros

López-Toledo

et al. 2023

Forests

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“…For the following statistical analyses, we only worked with the climatic variables: “T GS ” and “Twinter”, because they were the ones with which P. hartwegii showed greater PP through the traits of its growth rings. It should also be noted that a previous research ( Carrillo-Arizmendi et al., 2022b ) carried out correlations between these two climatic variables indicating that there is a relatively weak relationship (0.460 ≤ |r| ≤ 0.619), such that these two variables are not providing redundant information, so we consider it is appropriate to include both in order to compare the plastic response of trees to these two climate variables and determine which one might be more reliable across populations. The relative frequency of trees with significant RN (RN S ) for each growth ring trait-climate variable was calculated for each mountain/elevation combination (hereafter, “population”), to compare the overall “sensitivity” in PP of ring traits to different climate variables at the lower and upper end of the elevation gradient on both mountains.…”

Section: Methodsmentioning

confidence: 99%

Phenotypic plasticity of growth ring traits in Pinus hartwegii at the ends of its elevational gradient

Carrillo-Arizmendi,

Vargas-Hernández,

Rozenberg

et al. 2023

Front. Plant Sci.

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IntroductionPhenotypic plasticity (PP) could be an important short-term mechanism to modify physiological and morphological traits in response to climate change and global warming, particularly for high-mountain tree species. The objective was to evaluate PP response of growth ring traits to temperature and precipitation in Pinus hartwegii Lindl. populations located at the ends of its elevational gradient on two volcanic mountains in central Mexico (La Malinche and Nevado de Toluca).MethodsIncrement cores collected from 274 P. hartwegii trees were used to estimate their PP through reaction norms (RN), which relate the ring width and density traits with climate variables (temperature and precipitation). We estimated the trees’ sensitivity (significant RN) to climatic variables, as well as the relative proportion of RN with positive and negative slope. We also estimated the relationship between the PP of ring width and density traits using correlation and Principal Component (PC) analyses.ResultsOver 70% of all trees showed significant RN to growing season and winter temperatures for at least one growth ring trait, with a similar proportion of significant RN at both ends of the gradient on both mountains. Ring width traits had mostly negative RN, while ring density traits tended to have positive RN. Frequency of negative RN decreased from lower to higher elevation for most traits. Average PP was higher at the lower end of the gradient, especially on LM, both for ring width and ring density traits, although high intrapopulation variation in PP was found on both mountains.DiscussionResults indicate that P. hartwegii presents spatially differentiated plastic responses in width and density components of radial growth. PP was particularly strong at the lower elevation, which has higher temperature and water stress conditions, putting these populations at risk from the continuing global warming driven by climate change.

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Greater moisture impacts on radial growth of Larix sibirica in the eastern Altay Mountains since the 1990s

Gou,

Zhang,

et al. 2024

Int J Biometeorol

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Warming effects on tree-ring variables in P. hartwegii Lindl. at the extremes of its natural elevational distribution in central Mexico

Cited by 5 publications

References 70 publications

Analysis of the Vigor of Pinus hartwegii Lindl. along an Altitudinal Gradient Using UAV Multispectral Images: Evidence of Forest Decline Possibly Associated with Climatic Change

Analysis of the Vigor of Pinus hartwegii Lindl. along an Altitudinal Gradient Using UAV Multispectral Images: Evidence of Forest Decline Possibly Associated with Climatic Change

Phenotypic plasticity of growth ring traits in Pinus hartwegii at the ends of its elevational gradient

Greater moisture impacts on radial growth of Larix sibirica in the eastern Altay Mountains since the 1990s

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